java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/real-life/threadpooling_product.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-4eac566 [2018-09-23 19:31:24,616 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 19:31:24,619 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 19:31:24,632 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 19:31:24,632 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 19:31:24,633 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 19:31:24,635 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 19:31:24,637 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 19:31:24,642 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 19:31:24,644 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 19:31:24,644 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 19:31:24,645 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 19:31:24,648 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 19:31:24,649 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 19:31:24,650 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 19:31:24,653 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 19:31:24,654 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 19:31:24,661 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 19:31:24,666 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 19:31:24,668 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 19:31:24,671 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 19:31:24,672 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 19:31:24,677 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-09-23 19:31:24,677 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-09-23 19:31:24,677 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-09-23 19:31:24,678 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-09-23 19:31:24,680 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-09-23 19:31:24,681 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-09-23 19:31:24,682 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-09-23 19:31:24,684 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-09-23 19:31:24,685 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-09-23 19:31:24,687 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-09-23 19:31:24,687 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-09-23 19:31:24,687 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-09-23 19:31:24,688 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-09-23 19:31:24,689 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-09-23 19:31:24,690 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 19:31:24,721 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 19:31:24,721 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 19:31:24,722 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 19:31:24,722 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 19:31:24,723 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 19:31:24,723 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 19:31:24,723 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 19:31:24,724 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 19:31:24,724 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 19:31:24,724 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 19:31:24,724 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 19:31:24,724 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 19:31:24,725 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 19:31:24,725 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 19:31:24,725 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 19:31:24,725 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 19:31:24,725 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 19:31:24,726 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 19:31:24,726 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 19:31:24,726 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 19:31:24,726 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 19:31:24,726 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 19:31:24,727 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:31:24,727 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 19:31:24,727 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 19:31:24,727 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 19:31:24,727 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 19:31:24,728 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 19:31:24,728 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 19:31:24,728 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 19:31:24,793 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 19:31:24,808 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 19:31:24,815 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 19:31:24,817 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 19:31:24,818 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 19:31:24,819 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product.bpl [2018-09-23 19:31:24,819 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/real-life/threadpooling_product.bpl' [2018-09-23 19:31:24,887 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 19:31:24,891 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 19:31:24,891 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 19:31:24,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 19:31:24,892 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 19:31:24,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:24,930 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:24,935 WARN L165 Inliner]: Program contained no entry procedure! [2018-09-23 19:31:24,935 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-09-23 19:31:24,935 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-09-23 19:31:24,938 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 19:31:24,938 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 19:31:24,939 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 19:31:24,939 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 19:31:24,952 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:24,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:24,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:24,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:24,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:24,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:24,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... [2018-09-23 19:31:24,967 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 19:31:24,968 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 19:31:24,968 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 19:31:24,969 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 19:31:24,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 19:31:25,052 INFO L124 BoogieDeclarations]: Specification and implementation of procedure product given in one single declaration [2018-09-23 19:31:25,053 INFO L130 BoogieDeclarations]: Found specification of procedure product [2018-09-23 19:31:25,053 INFO L138 BoogieDeclarations]: Found implementation of procedure product [2018-09-23 19:31:25,538 INFO L351 CfgBuilder]: Using library mode [2018-09-23 19:31:25,539 INFO L202 PluginConnector]: Adding new model threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:31:25 BoogieIcfgContainer [2018-09-23 19:31:25,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 19:31:25,540 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 19:31:25,540 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 19:31:25,543 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 19:31:25,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 07:31:24" (1/2) ... [2018-09-23 19:31:25,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cef77b0 and model type threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 07:31:25, skipping insertion in model container [2018-09-23 19:31:25,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 07:31:25" (2/2) ... [2018-09-23 19:31:25,547 INFO L112 eAbstractionObserver]: Analyzing ICFG threadpooling_product.bpl [2018-09-23 19:31:25,565 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 19:31:25,583 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 4 error locations. [2018-09-23 19:31:25,637 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 19:31:25,637 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 19:31:25,638 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 19:31:25,638 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 19:31:25,638 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 19:31:25,638 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 19:31:25,638 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 19:31:25,639 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 19:31:25,639 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 19:31:25,656 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2018-09-23 19:31:25,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:31:25,663 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:25,664 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-23 19:31:25,665 INFO L423 AbstractCegarLoop]: === Iteration 1 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:25,672 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:25,672 INFO L82 PathProgramCache]: Analyzing trace with hash 28755683, now seen corresponding path program 1 times [2018-09-23 19:31:25,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:25,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:25,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:25,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:25,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:25,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:25,887 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:25,887 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 19:31:25,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:31:25,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:31:25,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:31:25,908 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2018-09-23 19:31:26,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:26,513 INFO L93 Difference]: Finished difference Result 49 states and 85 transitions. [2018-09-23 19:31:26,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:31:26,516 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-23 19:31:26,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:26,530 INFO L225 Difference]: With dead ends: 49 [2018-09-23 19:31:26,531 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 19:31:26,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:31:26,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 19:31:26,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 30. [2018-09-23 19:31:26,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-09-23 19:31:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 49 transitions. [2018-09-23 19:31:26,582 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 49 transitions. Word has length 5 [2018-09-23 19:31:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:26,583 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 49 transitions. [2018-09-23 19:31:26,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:31:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 49 transitions. [2018-09-23 19:31:26,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-09-23 19:31:26,584 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:26,584 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-09-23 19:31:26,585 INFO L423 AbstractCegarLoop]: === Iteration 2 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:26,585 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:26,585 INFO L82 PathProgramCache]: Analyzing trace with hash 28971747, now seen corresponding path program 1 times [2018-09-23 19:31:26,586 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:26,586 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:26,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:26,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:26,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:26,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:26,643 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:26,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 19:31:26,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-09-23 19:31:26,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-09-23 19:31:26,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-09-23 19:31:26,646 INFO L87 Difference]: Start difference. First operand 30 states and 49 transitions. Second operand 5 states. [2018-09-23 19:31:26,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:26,971 INFO L93 Difference]: Finished difference Result 57 states and 99 transitions. [2018-09-23 19:31:26,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-09-23 19:31:26,972 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-09-23 19:31:26,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:26,973 INFO L225 Difference]: With dead ends: 57 [2018-09-23 19:31:26,973 INFO L226 Difference]: Without dead ends: 55 [2018-09-23 19:31:26,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-09-23 19:31:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-09-23 19:31:26,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2018-09-23 19:31:26,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-09-23 19:31:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 63 transitions. [2018-09-23 19:31:26,985 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 63 transitions. Word has length 5 [2018-09-23 19:31:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:26,986 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 63 transitions. [2018-09-23 19:31:26,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-09-23 19:31:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 63 transitions. [2018-09-23 19:31:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:31:26,987 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:26,987 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:26,988 INFO L423 AbstractCegarLoop]: === Iteration 3 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:26,988 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:26,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1864688358, now seen corresponding path program 1 times [2018-09-23 19:31:26,988 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:26,989 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:26,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:26,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:26,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:27,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:27,170 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:27,170 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-09-23 19:31:27,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:31:27,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:31:27,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:31:27,174 INFO L87 Difference]: Start difference. First operand 38 states and 63 transitions. Second operand 7 states. [2018-09-23 19:31:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:28,388 INFO L93 Difference]: Finished difference Result 84 states and 147 transitions. [2018-09-23 19:31:28,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 19:31:28,389 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-09-23 19:31:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:28,392 INFO L225 Difference]: With dead ends: 84 [2018-09-23 19:31:28,392 INFO L226 Difference]: Without dead ends: 82 [2018-09-23 19:31:28,393 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:31:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2018-09-23 19:31:28,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 51. [2018-09-23 19:31:28,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-09-23 19:31:28,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 86 transitions. [2018-09-23 19:31:28,406 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 86 transitions. Word has length 7 [2018-09-23 19:31:28,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:28,406 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 86 transitions. [2018-09-23 19:31:28,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:31:28,406 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 86 transitions. [2018-09-23 19:31:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-09-23 19:31:28,407 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:28,408 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2018-09-23 19:31:28,408 INFO L423 AbstractCegarLoop]: === Iteration 4 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:28,408 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:28,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1865765160, now seen corresponding path program 1 times [2018-09-23 19:31:28,409 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:28,409 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:28,410 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:28,410 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:28,411 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:28,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:28,505 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:28,505 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:28,517 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:28,555 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:28,697 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:31:28,698 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2018-09-23 19:31:28,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-09-23 19:31:28,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-09-23 19:31:28,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:31:28,699 INFO L87 Difference]: Start difference. First operand 51 states and 86 transitions. Second operand 9 states. [2018-09-23 19:31:29,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:29,587 INFO L93 Difference]: Finished difference Result 142 states and 245 transitions. [2018-09-23 19:31:29,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:31:29,589 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 7 [2018-09-23 19:31:29,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:29,591 INFO L225 Difference]: With dead ends: 142 [2018-09-23 19:31:29,591 INFO L226 Difference]: Without dead ends: 108 [2018-09-23 19:31:29,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2018-09-23 19:31:29,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2018-09-23 19:31:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 73. [2018-09-23 19:31:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-09-23 19:31:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 120 transitions. [2018-09-23 19:31:29,609 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 120 transitions. Word has length 7 [2018-09-23 19:31:29,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:29,610 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 120 transitions. [2018-09-23 19:31:29,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-09-23 19:31:29,610 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 120 transitions. [2018-09-23 19:31:29,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-09-23 19:31:29,611 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:29,612 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:29,612 INFO L423 AbstractCegarLoop]: === Iteration 5 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:29,612 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:29,613 INFO L82 PathProgramCache]: Analyzing trace with hash 964893579, now seen corresponding path program 1 times [2018-09-23 19:31:29,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:29,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:29,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:29,614 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:29,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:29,809 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:29,809 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:29,816 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:29,827 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:29,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:29,873 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:31:29,873 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2018-09-23 19:31:29,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:31:29,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:31:29,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:31:29,875 INFO L87 Difference]: Start difference. First operand 73 states and 120 transitions. Second operand 11 states. [2018-09-23 19:31:30,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:30,731 INFO L93 Difference]: Finished difference Result 148 states and 240 transitions. [2018-09-23 19:31:30,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:31:30,731 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 9 [2018-09-23 19:31:30,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:30,735 INFO L225 Difference]: With dead ends: 148 [2018-09-23 19:31:30,735 INFO L226 Difference]: Without dead ends: 97 [2018-09-23 19:31:30,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=466, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:31:30,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2018-09-23 19:31:30,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2018-09-23 19:31:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2018-09-23 19:31:30,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 119 transitions. [2018-09-23 19:31:30,752 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 119 transitions. Word has length 9 [2018-09-23 19:31:30,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:30,752 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 119 transitions. [2018-09-23 19:31:30,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:31:30,752 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 119 transitions. [2018-09-23 19:31:30,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:31:30,753 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:30,753 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:30,754 INFO L423 AbstractCegarLoop]: === Iteration 6 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:30,754 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:30,754 INFO L82 PathProgramCache]: Analyzing trace with hash 101966393, now seen corresponding path program 1 times [2018-09-23 19:31:30,754 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:30,755 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:30,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:30,756 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:30,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:30,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:30,946 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:30,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:30,958 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:30,967 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:31,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:31,090 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:31,091 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 19:31:31,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:31:31,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:31:31,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:31,092 INFO L87 Difference]: Start difference. First operand 78 states and 119 transitions. Second operand 14 states. [2018-09-23 19:31:31,363 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 15 [2018-09-23 19:31:32,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:32,007 INFO L93 Difference]: Finished difference Result 124 states and 193 transitions. [2018-09-23 19:31:32,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:31:32,008 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-23 19:31:32,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:32,009 INFO L225 Difference]: With dead ends: 124 [2018-09-23 19:31:32,009 INFO L226 Difference]: Without dead ends: 123 [2018-09-23 19:31:32,010 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:31:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2018-09-23 19:31:32,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 107. [2018-09-23 19:31:32,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2018-09-23 19:31:32,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 173 transitions. [2018-09-23 19:31:32,029 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 173 transitions. Word has length 10 [2018-09-23 19:31:32,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:32,030 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 173 transitions. [2018-09-23 19:31:32,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:31:32,030 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 173 transitions. [2018-09-23 19:31:32,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:31:32,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:32,031 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:32,032 INFO L423 AbstractCegarLoop]: === Iteration 7 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:32,032 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:32,032 INFO L82 PathProgramCache]: Analyzing trace with hash 103259259, now seen corresponding path program 1 times [2018-09-23 19:31:32,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:32,033 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:32,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:32,034 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:32,034 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:32,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:32,189 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:32,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-23 19:31:32,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:31:32,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:31:32,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:31:32,190 INFO L87 Difference]: Start difference. First operand 107 states and 173 transitions. Second operand 8 states. [2018-09-23 19:31:33,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:33,025 INFO L93 Difference]: Finished difference Result 132 states and 203 transitions. [2018-09-23 19:31:33,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:31:33,026 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-23 19:31:33,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:33,027 INFO L225 Difference]: With dead ends: 132 [2018-09-23 19:31:33,027 INFO L226 Difference]: Without dead ends: 130 [2018-09-23 19:31:33,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:31:33,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2018-09-23 19:31:33,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2018-09-23 19:31:33,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2018-09-23 19:31:33,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 196 transitions. [2018-09-23 19:31:33,047 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 196 transitions. Word has length 10 [2018-09-23 19:31:33,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:33,047 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 196 transitions. [2018-09-23 19:31:33,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:31:33,048 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 196 transitions. [2018-09-23 19:31:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:31:33,049 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:33,049 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:33,049 INFO L423 AbstractCegarLoop]: === Iteration 8 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:33,049 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:33,050 INFO L82 PathProgramCache]: Analyzing trace with hash -176034144, now seen corresponding path program 1 times [2018-09-23 19:31:33,050 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:33,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:33,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:33,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:33,051 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:33,214 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:33,214 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:33,224 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:33,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:33,799 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:33,800 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-23 19:31:33,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:31:33,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:31:33,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:33,801 INFO L87 Difference]: Start difference. First operand 121 states and 196 transitions. Second operand 14 states. [2018-09-23 19:31:35,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:35,300 INFO L93 Difference]: Finished difference Result 162 states and 262 transitions. [2018-09-23 19:31:35,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:31:35,301 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-23 19:31:35,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:35,303 INFO L225 Difference]: With dead ends: 162 [2018-09-23 19:31:35,303 INFO L226 Difference]: Without dead ends: 160 [2018-09-23 19:31:35,304 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:31:35,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-09-23 19:31:35,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 129. [2018-09-23 19:31:35,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-09-23 19:31:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 209 transitions. [2018-09-23 19:31:35,324 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 209 transitions. Word has length 10 [2018-09-23 19:31:35,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:35,325 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 209 transitions. [2018-09-23 19:31:35,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:31:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 209 transitions. [2018-09-23 19:31:35,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:31:35,326 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:35,326 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:35,327 INFO L423 AbstractCegarLoop]: === Iteration 9 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:35,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:35,327 INFO L82 PathProgramCache]: Analyzing trace with hash -176034432, now seen corresponding path program 1 times [2018-09-23 19:31:35,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:35,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:35,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:35,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:35,329 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:35,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:35,398 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:35,398 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:35,408 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:35,415 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:35,658 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:35,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-09-23 19:31:35,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:31:35,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:31:35,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:31:35,660 INFO L87 Difference]: Start difference. First operand 129 states and 209 transitions. Second operand 13 states. [2018-09-23 19:31:37,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:37,629 INFO L93 Difference]: Finished difference Result 223 states and 343 transitions. [2018-09-23 19:31:37,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:31:37,631 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 10 [2018-09-23 19:31:37,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:37,633 INFO L225 Difference]: With dead ends: 223 [2018-09-23 19:31:37,633 INFO L226 Difference]: Without dead ends: 221 [2018-09-23 19:31:37,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:31:37,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-23 19:31:37,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 167. [2018-09-23 19:31:37,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-09-23 19:31:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 274 transitions. [2018-09-23 19:31:37,678 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 274 transitions. Word has length 10 [2018-09-23 19:31:37,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:37,679 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 274 transitions. [2018-09-23 19:31:37,679 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:31:37,679 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 274 transitions. [2018-09-23 19:31:37,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:31:37,681 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:37,682 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:37,682 INFO L423 AbstractCegarLoop]: === Iteration 10 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:37,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:37,682 INFO L82 PathProgramCache]: Analyzing trace with hash -184622601, now seen corresponding path program 1 times [2018-09-23 19:31:37,682 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:37,683 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:37,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:37,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:37,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:37,817 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:37,817 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:37,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:37,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:37,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:37,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:37,935 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 19:31:37,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:31:37,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:31:37,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:37,936 INFO L87 Difference]: Start difference. First operand 167 states and 274 transitions. Second operand 14 states. [2018-09-23 19:31:39,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:39,336 INFO L93 Difference]: Finished difference Result 222 states and 351 transitions. [2018-09-23 19:31:39,340 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:31:39,340 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-23 19:31:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:39,341 INFO L225 Difference]: With dead ends: 222 [2018-09-23 19:31:39,342 INFO L226 Difference]: Without dead ends: 221 [2018-09-23 19:31:39,343 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:31:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2018-09-23 19:31:39,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 181. [2018-09-23 19:31:39,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2018-09-23 19:31:39,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 297 transitions. [2018-09-23 19:31:39,372 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 297 transitions. Word has length 10 [2018-09-23 19:31:39,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:39,372 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 297 transitions. [2018-09-23 19:31:39,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:31:39,372 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 297 transitions. [2018-09-23 19:31:39,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:31:39,373 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:39,376 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:39,377 INFO L423 AbstractCegarLoop]: === Iteration 11 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:39,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:39,377 INFO L82 PathProgramCache]: Analyzing trace with hash -184621319, now seen corresponding path program 1 times [2018-09-23 19:31:39,377 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:39,377 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:39,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:39,378 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:39,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:39,551 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:39,552 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-23 19:31:39,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:31:39,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:31:39,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:31:39,553 INFO L87 Difference]: Start difference. First operand 181 states and 297 transitions. Second operand 8 states. [2018-09-23 19:31:39,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:39,899 INFO L93 Difference]: Finished difference Result 203 states and 320 transitions. [2018-09-23 19:31:39,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:31:39,904 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-23 19:31:39,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:39,905 INFO L225 Difference]: With dead ends: 203 [2018-09-23 19:31:39,906 INFO L226 Difference]: Without dead ends: 201 [2018-09-23 19:31:39,906 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:31:39,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2018-09-23 19:31:39,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2018-09-23 19:31:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2018-09-23 19:31:39,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 301 transitions. [2018-09-23 19:31:39,938 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 301 transitions. Word has length 10 [2018-09-23 19:31:39,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:39,938 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 301 transitions. [2018-09-23 19:31:39,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:31:39,938 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 301 transitions. [2018-09-23 19:31:39,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:31:39,939 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:39,939 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:39,940 INFO L423 AbstractCegarLoop]: === Iteration 12 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:39,940 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:39,940 INFO L82 PathProgramCache]: Analyzing trace with hash -973282432, now seen corresponding path program 1 times [2018-09-23 19:31:39,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:39,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:39,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:39,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:39,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:40,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:40,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:40,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:40,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:40,197 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:40,197 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 19:31:40,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:31:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:31:40,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:40,198 INFO L87 Difference]: Start difference. First operand 183 states and 301 transitions. Second operand 14 states. [2018-09-23 19:31:41,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:41,551 INFO L93 Difference]: Finished difference Result 241 states and 385 transitions. [2018-09-23 19:31:41,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-09-23 19:31:41,552 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-23 19:31:41,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:41,553 INFO L225 Difference]: With dead ends: 241 [2018-09-23 19:31:41,553 INFO L226 Difference]: Without dead ends: 240 [2018-09-23 19:31:41,554 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:31:41,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2018-09-23 19:31:41,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 202. [2018-09-23 19:31:41,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2018-09-23 19:31:41,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 336 transitions. [2018-09-23 19:31:41,580 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 336 transitions. Word has length 10 [2018-09-23 19:31:41,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:41,580 INFO L480 AbstractCegarLoop]: Abstraction has 202 states and 336 transitions. [2018-09-23 19:31:41,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:31:41,580 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 336 transitions. [2018-09-23 19:31:41,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:31:41,581 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:41,581 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:41,581 INFO L423 AbstractCegarLoop]: === Iteration 13 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:41,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:41,582 INFO L82 PathProgramCache]: Analyzing trace with hash -973281662, now seen corresponding path program 1 times [2018-09-23 19:31:41,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:41,582 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:41,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:41,583 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:41,583 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:41,715 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:41,716 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-23 19:31:41,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:31:41,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:31:41,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:31:41,717 INFO L87 Difference]: Start difference. First operand 202 states and 336 transitions. Second operand 8 states. [2018-09-23 19:31:42,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:42,032 INFO L93 Difference]: Finished difference Result 220 states and 353 transitions. [2018-09-23 19:31:42,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 19:31:42,033 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-23 19:31:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:42,034 INFO L225 Difference]: With dead ends: 220 [2018-09-23 19:31:42,035 INFO L226 Difference]: Without dead ends: 218 [2018-09-23 19:31:42,035 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:31:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2018-09-23 19:31:42,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2018-09-23 19:31:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2018-09-23 19:31:42,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 348 transitions. [2018-09-23 19:31:42,063 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 348 transitions. Word has length 10 [2018-09-23 19:31:42,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:42,063 INFO L480 AbstractCegarLoop]: Abstraction has 210 states and 348 transitions. [2018-09-23 19:31:42,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:31:42,063 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 348 transitions. [2018-09-23 19:31:42,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:31:42,064 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:42,064 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:42,064 INFO L423 AbstractCegarLoop]: === Iteration 14 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:42,065 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:42,065 INFO L82 PathProgramCache]: Analyzing trace with hash -981870601, now seen corresponding path program 1 times [2018-09-23 19:31:42,065 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:42,065 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:42,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:42,066 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:42,066 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:42,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:42,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:42,210 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:42,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:42,218 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:42,229 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:42,339 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:42,339 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-09-23 19:31:42,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:31:42,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:31:42,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:31:42,341 INFO L87 Difference]: Start difference. First operand 210 states and 348 transitions. Second operand 13 states. [2018-09-23 19:31:43,638 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-09-23 19:31:44,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:44,576 INFO L93 Difference]: Finished difference Result 320 states and 507 transitions. [2018-09-23 19:31:44,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:31:44,577 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 10 [2018-09-23 19:31:44,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:44,579 INFO L225 Difference]: With dead ends: 320 [2018-09-23 19:31:44,580 INFO L226 Difference]: Without dead ends: 318 [2018-09-23 19:31:44,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=349, Invalid=1631, Unknown=0, NotChecked=0, Total=1980 [2018-09-23 19:31:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2018-09-23 19:31:44,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 259. [2018-09-23 19:31:44,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2018-09-23 19:31:44,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 430 transitions. [2018-09-23 19:31:44,613 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 430 transitions. Word has length 10 [2018-09-23 19:31:44,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:44,613 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 430 transitions. [2018-09-23 19:31:44,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:31:44,613 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 430 transitions. [2018-09-23 19:31:44,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:31:44,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:44,614 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:44,615 INFO L423 AbstractCegarLoop]: === Iteration 15 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:44,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:44,615 INFO L82 PathProgramCache]: Analyzing trace with hash -981870889, now seen corresponding path program 1 times [2018-09-23 19:31:44,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:44,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:44,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:44,616 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:44,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:44,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:44,714 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:44,714 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:44,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:44,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:44,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:44,911 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:44,911 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2018-09-23 19:31:44,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:31:44,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:31:44,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:44,912 INFO L87 Difference]: Start difference. First operand 259 states and 430 transitions. Second operand 14 states. [2018-09-23 19:31:45,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:45,463 INFO L93 Difference]: Finished difference Result 304 states and 503 transitions. [2018-09-23 19:31:45,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 19:31:45,463 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-23 19:31:45,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:45,465 INFO L225 Difference]: With dead ends: 304 [2018-09-23 19:31:45,465 INFO L226 Difference]: Without dead ends: 302 [2018-09-23 19:31:45,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:31:45,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2018-09-23 19:31:45,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 270. [2018-09-23 19:31:45,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-09-23 19:31:45,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 448 transitions. [2018-09-23 19:31:45,504 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 448 transitions. Word has length 10 [2018-09-23 19:31:45,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:45,504 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 448 transitions. [2018-09-23 19:31:45,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:31:45,504 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 448 transitions. [2018-09-23 19:31:45,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:31:45,505 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:45,505 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:45,505 INFO L423 AbstractCegarLoop]: === Iteration 16 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:45,505 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:45,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1101306322, now seen corresponding path program 1 times [2018-09-23 19:31:45,506 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:45,506 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:45,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:45,507 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:45,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:45,860 WARN L178 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2018-09-23 19:31:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:45,908 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:45,908 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:45,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:45,925 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:46,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:46,049 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:46,049 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 19:31:46,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:31:46,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:31:46,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:46,050 INFO L87 Difference]: Start difference. First operand 270 states and 448 transitions. Second operand 14 states. [2018-09-23 19:31:46,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:46,557 INFO L93 Difference]: Finished difference Result 281 states and 455 transitions. [2018-09-23 19:31:46,557 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:31:46,557 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 10 [2018-09-23 19:31:46,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:46,559 INFO L225 Difference]: With dead ends: 281 [2018-09-23 19:31:46,559 INFO L226 Difference]: Without dead ends: 280 [2018-09-23 19:31:46,560 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2018-09-23 19:31:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2018-09-23 19:31:46,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 270. [2018-09-23 19:31:46,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2018-09-23 19:31:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 447 transitions. [2018-09-23 19:31:46,599 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 447 transitions. Word has length 10 [2018-09-23 19:31:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:46,600 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 447 transitions. [2018-09-23 19:31:46,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:31:46,600 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 447 transitions. [2018-09-23 19:31:46,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 19:31:46,600 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:46,601 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:46,601 INFO L423 AbstractCegarLoop]: === Iteration 17 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:46,601 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:46,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1102106644, now seen corresponding path program 1 times [2018-09-23 19:31:46,601 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:46,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:46,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:46,602 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:46,602 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:47,124 WARN L178 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 7 [2018-09-23 19:31:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:47,141 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 19:31:47,141 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2018-09-23 19:31:47,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 19:31:47,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 19:31:47,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2018-09-23 19:31:47,141 INFO L87 Difference]: Start difference. First operand 270 states and 447 transitions. Second operand 8 states. [2018-09-23 19:31:47,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:47,570 INFO L93 Difference]: Finished difference Result 286 states and 460 transitions. [2018-09-23 19:31:47,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-09-23 19:31:47,570 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2018-09-23 19:31:47,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:47,572 INFO L225 Difference]: With dead ends: 286 [2018-09-23 19:31:47,572 INFO L226 Difference]: Without dead ends: 284 [2018-09-23 19:31:47,573 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:31:47,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2018-09-23 19:31:47,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 268. [2018-09-23 19:31:47,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 268 states. [2018-09-23 19:31:47,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 443 transitions. [2018-09-23 19:31:47,616 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 443 transitions. Word has length 10 [2018-09-23 19:31:47,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:47,616 INFO L480 AbstractCegarLoop]: Abstraction has 268 states and 443 transitions. [2018-09-23 19:31:47,616 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 19:31:47,616 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 443 transitions. [2018-09-23 19:31:47,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:31:47,617 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:47,617 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:47,618 INFO L423 AbstractCegarLoop]: === Iteration 18 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:47,618 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:47,618 INFO L82 PathProgramCache]: Analyzing trace with hash 240543358, now seen corresponding path program 1 times [2018-09-23 19:31:47,618 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:47,618 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:47,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:47,619 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:47,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:48,537 WARN L178 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 13 [2018-09-23 19:31:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:48,841 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:48,841 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:48,862 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:48,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:48,871 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:49,043 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:49,043 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2018-09-23 19:31:49,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:31:49,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:31:49,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:31:49,044 INFO L87 Difference]: Start difference. First operand 268 states and 443 transitions. Second operand 16 states. [2018-09-23 19:31:49,832 WARN L178 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2018-09-23 19:31:51,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:51,840 INFO L93 Difference]: Finished difference Result 515 states and 842 transitions. [2018-09-23 19:31:51,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:31:51,840 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-09-23 19:31:51,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:51,843 INFO L225 Difference]: With dead ends: 515 [2018-09-23 19:31:51,843 INFO L226 Difference]: Without dead ends: 513 [2018-09-23 19:31:51,845 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:31:51,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2018-09-23 19:31:51,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 338. [2018-09-23 19:31:51,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2018-09-23 19:31:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 568 transitions. [2018-09-23 19:31:51,897 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 568 transitions. Word has length 12 [2018-09-23 19:31:51,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:51,898 INFO L480 AbstractCegarLoop]: Abstraction has 338 states and 568 transitions. [2018-09-23 19:31:51,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:31:51,898 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 568 transitions. [2018-09-23 19:31:51,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 19:31:51,899 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:51,899 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:51,899 INFO L423 AbstractCegarLoop]: === Iteration 19 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:51,899 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:51,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1525011273, now seen corresponding path program 1 times [2018-09-23 19:31:51,900 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:51,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:51,900 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:51,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:51,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:52,163 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:52,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:52,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:52,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:52,186 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:52,313 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:52,314 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 15 [2018-09-23 19:31:52,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:31:52,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:31:52,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:31:52,315 INFO L87 Difference]: Start difference. First operand 338 states and 568 transitions. Second operand 16 states. [2018-09-23 19:31:53,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:53,825 INFO L93 Difference]: Finished difference Result 631 states and 1050 transitions. [2018-09-23 19:31:53,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-09-23 19:31:53,825 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2018-09-23 19:31:53,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:53,828 INFO L225 Difference]: With dead ends: 631 [2018-09-23 19:31:53,828 INFO L226 Difference]: Without dead ends: 629 [2018-09-23 19:31:53,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:31:53,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2018-09-23 19:31:53,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 403. [2018-09-23 19:31:53,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2018-09-23 19:31:53,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 685 transitions. [2018-09-23 19:31:53,909 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 685 transitions. Word has length 12 [2018-09-23 19:31:53,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:53,909 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 685 transitions. [2018-09-23 19:31:53,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:31:53,909 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 685 transitions. [2018-09-23 19:31:53,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:31:53,910 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:53,910 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:53,911 INFO L423 AbstractCegarLoop]: === Iteration 20 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:53,911 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:53,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1000080215, now seen corresponding path program 1 times [2018-09-23 19:31:53,911 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:53,911 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:53,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:53,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:53,912 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:53,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:54,001 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:54,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:54,008 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:54,014 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:54,127 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:31:54,127 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-23 19:31:54,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:31:54,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:31:54,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:54,128 INFO L87 Difference]: Start difference. First operand 403 states and 685 transitions. Second operand 14 states. [2018-09-23 19:31:56,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:56,339 INFO L93 Difference]: Finished difference Result 1330 states and 2225 transitions. [2018-09-23 19:31:56,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:31:56,340 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-23 19:31:56,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:56,343 INFO L225 Difference]: With dead ends: 1330 [2018-09-23 19:31:56,343 INFO L226 Difference]: Without dead ends: 929 [2018-09-23 19:31:56,346 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=660, Invalid=3122, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:31:56,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2018-09-23 19:31:56,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 694. [2018-09-23 19:31:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2018-09-23 19:31:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1171 transitions. [2018-09-23 19:31:56,475 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1171 transitions. Word has length 13 [2018-09-23 19:31:56,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:56,475 INFO L480 AbstractCegarLoop]: Abstraction has 694 states and 1171 transitions. [2018-09-23 19:31:56,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:31:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1171 transitions. [2018-09-23 19:31:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:31:56,476 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:56,477 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:56,477 INFO L423 AbstractCegarLoop]: === Iteration 21 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:56,477 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:56,477 INFO L82 PathProgramCache]: Analyzing trace with hash -86603521, now seen corresponding path program 1 times [2018-09-23 19:31:56,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:56,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:56,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:56,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:56,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:56,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:56,630 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:56,630 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:56,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:56,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:56,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:56,798 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:56,798 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-23 19:31:56,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:31:56,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:31:56,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:31:56,800 INFO L87 Difference]: Start difference. First operand 694 states and 1171 transitions. Second operand 14 states. [2018-09-23 19:31:57,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:57,989 INFO L93 Difference]: Finished difference Result 1557 states and 2604 transitions. [2018-09-23 19:31:57,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:31:57,989 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-23 19:31:57,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:57,993 INFO L225 Difference]: With dead ends: 1557 [2018-09-23 19:31:57,993 INFO L226 Difference]: Without dead ends: 864 [2018-09-23 19:31:57,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:31:57,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2018-09-23 19:31:58,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 741. [2018-09-23 19:31:58,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2018-09-23 19:31:58,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 1247 transitions. [2018-09-23 19:31:58,142 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 1247 transitions. Word has length 13 [2018-09-23 19:31:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:58,143 INFO L480 AbstractCegarLoop]: Abstraction has 741 states and 1247 transitions. [2018-09-23 19:31:58,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:31:58,143 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 1247 transitions. [2018-09-23 19:31:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:31:58,144 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:58,144 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:58,144 INFO L423 AbstractCegarLoop]: === Iteration 22 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:58,144 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:58,145 INFO L82 PathProgramCache]: Analyzing trace with hash -63701769, now seen corresponding path program 1 times [2018-09-23 19:31:58,145 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:58,145 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:58,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:58,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:58,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:58,280 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:58,280 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:31:58,288 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:58,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:58,486 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:58,486 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2018-09-23 19:31:58,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:31:58,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:31:58,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:31:58,487 INFO L87 Difference]: Start difference. First operand 741 states and 1247 transitions. Second operand 13 states. [2018-09-23 19:31:59,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:31:59,496 INFO L93 Difference]: Finished difference Result 1655 states and 2757 transitions. [2018-09-23 19:31:59,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:31:59,498 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-23 19:31:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:31:59,502 INFO L225 Difference]: With dead ends: 1655 [2018-09-23 19:31:59,502 INFO L226 Difference]: Without dead ends: 915 [2018-09-23 19:31:59,504 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:31:59,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 915 states. [2018-09-23 19:31:59,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 915 to 809. [2018-09-23 19:31:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2018-09-23 19:31:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 1353 transitions. [2018-09-23 19:31:59,639 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 1353 transitions. Word has length 13 [2018-09-23 19:31:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:31:59,639 INFO L480 AbstractCegarLoop]: Abstraction has 809 states and 1353 transitions. [2018-09-23 19:31:59,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:31:59,639 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 1353 transitions. [2018-09-23 19:31:59,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:31:59,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:31:59,640 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:31:59,640 INFO L423 AbstractCegarLoop]: === Iteration 23 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:31:59,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:31:59,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1761298639, now seen corresponding path program 1 times [2018-09-23 19:31:59,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:31:59,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:31:59,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:59,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:59,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:31:59,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:59,736 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:31:59,737 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 [2018-09-23 19:31:59,745 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:31:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:31:59,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:31:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:31:59,821 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:31:59,821 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-09-23 19:31:59,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:31:59,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:31:59,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:31:59,822 INFO L87 Difference]: Start difference. First operand 809 states and 1353 transitions. Second operand 10 states. [2018-09-23 19:32:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:00,618 INFO L93 Difference]: Finished difference Result 939 states and 1541 transitions. [2018-09-23 19:32:00,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:32:00,618 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-09-23 19:32:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:00,622 INFO L225 Difference]: With dead ends: 939 [2018-09-23 19:32:00,622 INFO L226 Difference]: Without dead ends: 937 [2018-09-23 19:32:00,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:32:00,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2018-09-23 19:32:00,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 820. [2018-09-23 19:32:00,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 820 states. [2018-09-23 19:32:00,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 1367 transitions. [2018-09-23 19:32:00,754 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 1367 transitions. Word has length 13 [2018-09-23 19:32:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:00,754 INFO L480 AbstractCegarLoop]: Abstraction has 820 states and 1367 transitions. [2018-09-23 19:32:00,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:32:00,754 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 1367 transitions. [2018-09-23 19:32:00,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:32:00,755 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:00,755 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:00,755 INFO L423 AbstractCegarLoop]: === Iteration 24 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:00,756 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:00,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1799471129, now seen corresponding path program 1 times [2018-09-23 19:32:00,756 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:00,756 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:00,756 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:00,757 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:00,757 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:00,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:00,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:00,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:00,844 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:00,865 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:01,266 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:32:01,266 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-23 19:32:01,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:32:01,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:32:01,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:32:01,267 INFO L87 Difference]: Start difference. First operand 820 states and 1367 transitions. Second operand 14 states. [2018-09-23 19:32:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:03,121 INFO L93 Difference]: Finished difference Result 2058 states and 3403 transitions. [2018-09-23 19:32:03,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:32:03,121 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-23 19:32:03,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:03,127 INFO L225 Difference]: With dead ends: 2058 [2018-09-23 19:32:03,127 INFO L226 Difference]: Without dead ends: 1239 [2018-09-23 19:32:03,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=436, Invalid=2426, Unknown=0, NotChecked=0, Total=2862 [2018-09-23 19:32:03,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1239 states. [2018-09-23 19:32:03,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1239 to 899. [2018-09-23 19:32:03,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2018-09-23 19:32:03,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1500 transitions. [2018-09-23 19:32:03,354 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1500 transitions. Word has length 13 [2018-09-23 19:32:03,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:03,354 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 1500 transitions. [2018-09-23 19:32:03,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:32:03,354 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1500 transitions. [2018-09-23 19:32:03,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:32:03,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:03,355 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:03,355 INFO L423 AbstractCegarLoop]: === Iteration 25 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:03,356 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:03,356 INFO L82 PathProgramCache]: Analyzing trace with hash 267374077, now seen corresponding path program 1 times [2018-09-23 19:32:03,356 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:03,356 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:03,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:03,357 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:03,357 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:03,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:03,834 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:03,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:03,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:03,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:04,408 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:04,409 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2018-09-23 19:32:04,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 19:32:04,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 19:32:04,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2018-09-23 19:32:04,411 INFO L87 Difference]: Start difference. First operand 899 states and 1500 transitions. Second operand 10 states. [2018-09-23 19:32:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:05,452 INFO L93 Difference]: Finished difference Result 1038 states and 1712 transitions. [2018-09-23 19:32:05,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:32:05,452 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2018-09-23 19:32:05,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:05,456 INFO L225 Difference]: With dead ends: 1038 [2018-09-23 19:32:05,457 INFO L226 Difference]: Without dead ends: 1036 [2018-09-23 19:32:05,457 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2018-09-23 19:32:05,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2018-09-23 19:32:05,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 897. [2018-09-23 19:32:05,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 897 states. [2018-09-23 19:32:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1498 transitions. [2018-09-23 19:32:05,617 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1498 transitions. Word has length 13 [2018-09-23 19:32:05,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:05,618 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1498 transitions. [2018-09-23 19:32:05,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 19:32:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1498 transitions. [2018-09-23 19:32:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:32:05,618 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:05,619 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:05,619 INFO L423 AbstractCegarLoop]: === Iteration 26 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:05,619 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:05,619 INFO L82 PathProgramCache]: Analyzing trace with hash 290277111, now seen corresponding path program 1 times [2018-09-23 19:32:05,619 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:05,620 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:05,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:05,620 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:05,620 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:05,777 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:05,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:05,788 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:05,795 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:05,885 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:32:05,885 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-23 19:32:05,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:32:05,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:32:05,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:32:05,886 INFO L87 Difference]: Start difference. First operand 897 states and 1498 transitions. Second operand 14 states. [2018-09-23 19:32:06,172 WARN L178 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 11 [2018-09-23 19:32:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:08,194 INFO L93 Difference]: Finished difference Result 2193 states and 3616 transitions. [2018-09-23 19:32:08,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-09-23 19:32:08,194 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-23 19:32:08,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:08,200 INFO L225 Difference]: With dead ends: 2193 [2018-09-23 19:32:08,200 INFO L226 Difference]: Without dead ends: 1286 [2018-09-23 19:32:08,203 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 834 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=445, Invalid=2525, Unknown=0, NotChecked=0, Total=2970 [2018-09-23 19:32:08,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2018-09-23 19:32:08,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 995. [2018-09-23 19:32:08,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 995 states. [2018-09-23 19:32:08,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1646 transitions. [2018-09-23 19:32:08,398 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1646 transitions. Word has length 13 [2018-09-23 19:32:08,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:08,398 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 1646 transitions. [2018-09-23 19:32:08,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:32:08,398 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1646 transitions. [2018-09-23 19:32:08,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:32:08,399 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:08,399 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:08,399 INFO L423 AbstractCegarLoop]: === Iteration 27 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:08,400 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:08,400 INFO L82 PathProgramCache]: Analyzing trace with hash 2115278289, now seen corresponding path program 1 times [2018-09-23 19:32:08,400 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:08,400 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:08,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:08,401 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:08,401 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:08,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:08,470 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:08,471 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:08,479 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:08,485 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:08,617 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:08,617 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-09-23 19:32:08,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:32:08,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:32:08,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:32:08,618 INFO L87 Difference]: Start difference. First operand 995 states and 1646 transitions. Second operand 14 states. [2018-09-23 19:32:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:09,790 INFO L93 Difference]: Finished difference Result 2165 states and 3551 transitions. [2018-09-23 19:32:09,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:32:09,797 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-23 19:32:09,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:09,802 INFO L225 Difference]: With dead ends: 2165 [2018-09-23 19:32:09,802 INFO L226 Difference]: Without dead ends: 1153 [2018-09-23 19:32:09,804 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=928, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:32:09,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2018-09-23 19:32:09,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1001. [2018-09-23 19:32:09,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1001 states. [2018-09-23 19:32:09,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1642 transitions. [2018-09-23 19:32:09,973 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1642 transitions. Word has length 13 [2018-09-23 19:32:09,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:09,973 INFO L480 AbstractCegarLoop]: Abstraction has 1001 states and 1642 transitions. [2018-09-23 19:32:09,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:32:09,974 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1642 transitions. [2018-09-23 19:32:09,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:32:09,975 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:09,975 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:09,975 INFO L423 AbstractCegarLoop]: === Iteration 28 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:09,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:09,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2141517287, now seen corresponding path program 1 times [2018-09-23 19:32:09,976 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:09,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:09,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:09,976 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:09,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:10,062 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:10,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:10,071 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:10,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:10,211 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:10,211 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2018-09-23 19:32:10,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:32:10,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:32:10,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:32:10,212 INFO L87 Difference]: Start difference. First operand 1001 states and 1642 transitions. Second operand 13 states. [2018-09-23 19:32:11,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:11,875 INFO L93 Difference]: Finished difference Result 1397 states and 2244 transitions. [2018-09-23 19:32:11,878 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:32:11,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-09-23 19:32:11,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:11,883 INFO L225 Difference]: With dead ends: 1397 [2018-09-23 19:32:11,883 INFO L226 Difference]: Without dead ends: 1125 [2018-09-23 19:32:11,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:32:11,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2018-09-23 19:32:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 995. [2018-09-23 19:32:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 995 states. [2018-09-23 19:32:12,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 1627 transitions. [2018-09-23 19:32:12,057 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 1627 transitions. Word has length 13 [2018-09-23 19:32:12,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:12,058 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 1627 transitions. [2018-09-23 19:32:12,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:32:12,058 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 1627 transitions. [2018-09-23 19:32:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-09-23 19:32:12,058 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:12,058 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:12,059 INFO L423 AbstractCegarLoop]: === Iteration 29 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:12,059 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:12,059 INFO L82 PathProgramCache]: Analyzing trace with hash 2129075237, now seen corresponding path program 1 times [2018-09-23 19:32:12,059 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:12,059 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:12,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:12,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:12,060 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:12,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:12,159 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:12,160 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:12,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:12,174 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:12,267 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:32:12,268 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 14 [2018-09-23 19:32:12,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:32:12,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:32:12,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:32:12,269 INFO L87 Difference]: Start difference. First operand 995 states and 1627 transitions. Second operand 14 states. [2018-09-23 19:32:14,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:14,540 INFO L93 Difference]: Finished difference Result 2724 states and 4397 transitions. [2018-09-23 19:32:14,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-09-23 19:32:14,540 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 13 [2018-09-23 19:32:14,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:14,546 INFO L225 Difference]: With dead ends: 2724 [2018-09-23 19:32:14,546 INFO L226 Difference]: Without dead ends: 1719 [2018-09-23 19:32:14,549 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=660, Invalid=3122, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:32:14,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1719 states. [2018-09-23 19:32:14,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1719 to 1241. [2018-09-23 19:32:14,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1241 states. [2018-09-23 19:32:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2017 transitions. [2018-09-23 19:32:14,784 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2017 transitions. Word has length 13 [2018-09-23 19:32:14,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:14,784 INFO L480 AbstractCegarLoop]: Abstraction has 1241 states and 2017 transitions. [2018-09-23 19:32:14,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:32:14,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2017 transitions. [2018-09-23 19:32:14,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:32:14,785 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:14,785 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:14,785 INFO L423 AbstractCegarLoop]: === Iteration 30 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:14,786 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:14,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1374164806, now seen corresponding path program 1 times [2018-09-23 19:32:14,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:14,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:14,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:14,787 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:14,787 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:14,900 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:14,900 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) [2018-09-23 19:32:14,916 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:14,932 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:15,047 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:15,047 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2018-09-23 19:32:15,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:32:15,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:32:15,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:15,048 INFO L87 Difference]: Start difference. First operand 1241 states and 2017 transitions. Second operand 15 states. [2018-09-23 19:32:16,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:16,481 INFO L93 Difference]: Finished difference Result 1442 states and 2324 transitions. [2018-09-23 19:32:16,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-09-23 19:32:16,482 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-09-23 19:32:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:16,486 INFO L225 Difference]: With dead ends: 1442 [2018-09-23 19:32:16,486 INFO L226 Difference]: Without dead ends: 1440 [2018-09-23 19:32:16,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:32:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2018-09-23 19:32:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1225. [2018-09-23 19:32:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1225 states. [2018-09-23 19:32:16,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1225 states to 1225 states and 1983 transitions. [2018-09-23 19:32:16,721 INFO L78 Accepts]: Start accepts. Automaton has 1225 states and 1983 transitions. Word has length 15 [2018-09-23 19:32:16,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:16,721 INFO L480 AbstractCegarLoop]: Abstraction has 1225 states and 1983 transitions. [2018-09-23 19:32:16,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:32:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 1225 states and 1983 transitions. [2018-09-23 19:32:16,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-09-23 19:32:16,722 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:16,722 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:16,723 INFO L423 AbstractCegarLoop]: === Iteration 31 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:16,723 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:16,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1511389740, now seen corresponding path program 1 times [2018-09-23 19:32:16,723 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:16,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:16,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:16,724 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:16,724 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:16,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:16,844 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:16,844 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:16,851 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:16,859 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:16,960 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:16,961 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2018-09-23 19:32:16,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:32:16,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:32:16,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:32:16,961 INFO L87 Difference]: Start difference. First operand 1225 states and 1983 transitions. Second operand 12 states. [2018-09-23 19:32:18,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:18,035 INFO L93 Difference]: Finished difference Result 1389 states and 2225 transitions. [2018-09-23 19:32:18,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:32:18,035 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2018-09-23 19:32:18,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:18,040 INFO L225 Difference]: With dead ends: 1389 [2018-09-23 19:32:18,040 INFO L226 Difference]: Without dead ends: 1387 [2018-09-23 19:32:18,040 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2018-09-23 19:32:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2018-09-23 19:32:18,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1211. [2018-09-23 19:32:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1211 states. [2018-09-23 19:32:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1953 transitions. [2018-09-23 19:32:18,273 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1953 transitions. Word has length 15 [2018-09-23 19:32:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:18,273 INFO L480 AbstractCegarLoop]: Abstraction has 1211 states and 1953 transitions. [2018-09-23 19:32:18,273 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:32:18,273 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1953 transitions. [2018-09-23 19:32:18,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:32:18,274 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:18,274 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:18,275 INFO L423 AbstractCegarLoop]: === Iteration 32 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:18,275 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:18,275 INFO L82 PathProgramCache]: Analyzing trace with hash -593242831, now seen corresponding path program 1 times [2018-09-23 19:32:18,275 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:18,275 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:18,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:18,276 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:18,276 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:18,475 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:18,475 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:18,482 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:18,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:18,488 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:18,590 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:18,590 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2018-09-23 19:32:18,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 19:32:18,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 19:32:18,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2018-09-23 19:32:18,591 INFO L87 Difference]: Start difference. First operand 1211 states and 1953 transitions. Second operand 14 states. [2018-09-23 19:32:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:20,243 INFO L93 Difference]: Finished difference Result 1445 states and 2303 transitions. [2018-09-23 19:32:20,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:32:20,244 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 16 [2018-09-23 19:32:20,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:20,250 INFO L225 Difference]: With dead ends: 1445 [2018-09-23 19:32:20,250 INFO L226 Difference]: Without dead ends: 1443 [2018-09-23 19:32:20,251 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=239, Invalid=1093, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:32:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2018-09-23 19:32:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1205. [2018-09-23 19:32:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2018-09-23 19:32:20,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1938 transitions. [2018-09-23 19:32:20,530 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1938 transitions. Word has length 16 [2018-09-23 19:32:20,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:20,531 INFO L480 AbstractCegarLoop]: Abstraction has 1205 states and 1938 transitions. [2018-09-23 19:32:20,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 19:32:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1938 transitions. [2018-09-23 19:32:20,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:32:20,532 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:20,532 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:20,532 INFO L423 AbstractCegarLoop]: === Iteration 33 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:20,532 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:20,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1223170690, now seen corresponding path program 1 times [2018-09-23 19:32:20,533 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:20,533 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:20,533 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:20,534 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:20,534 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:20,657 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:20,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:20,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:20,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:20,722 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:20,742 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:20,743 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2018-09-23 19:32:20,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:32:20,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:32:20,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:32:20,743 INFO L87 Difference]: Start difference. First operand 1205 states and 1938 transitions. Second operand 12 states. [2018-09-23 19:32:22,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:22,388 INFO L93 Difference]: Finished difference Result 1420 states and 2265 transitions. [2018-09-23 19:32:22,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:32:22,388 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-09-23 19:32:22,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:22,393 INFO L225 Difference]: With dead ends: 1420 [2018-09-23 19:32:22,393 INFO L226 Difference]: Without dead ends: 1418 [2018-09-23 19:32:22,394 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:32:22,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2018-09-23 19:32:22,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1213. [2018-09-23 19:32:22,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1213 states. [2018-09-23 19:32:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 1951 transitions. [2018-09-23 19:32:22,639 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 1951 transitions. Word has length 16 [2018-09-23 19:32:22,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:22,639 INFO L480 AbstractCegarLoop]: Abstraction has 1213 states and 1951 transitions. [2018-09-23 19:32:22,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:32:22,639 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 1951 transitions. [2018-09-23 19:32:22,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:32:22,640 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:22,640 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:22,640 INFO L423 AbstractCegarLoop]: === Iteration 34 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:22,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:22,641 INFO L82 PathProgramCache]: Analyzing trace with hash -767609008, now seen corresponding path program 2 times [2018-09-23 19:32:22,641 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:22,641 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:22,641 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:22,642 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:22,642 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:22,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:22,708 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:22,708 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:22,719 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:22,733 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:22,733 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:22,734 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:22,786 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:22,786 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-23 19:32:22,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:32:22,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:32:22,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:32:22,787 INFO L87 Difference]: Start difference. First operand 1213 states and 1951 transitions. Second operand 11 states. [2018-09-23 19:32:23,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:23,668 INFO L93 Difference]: Finished difference Result 1334 states and 2129 transitions. [2018-09-23 19:32:23,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:32:23,669 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2018-09-23 19:32:23,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:23,674 INFO L225 Difference]: With dead ends: 1334 [2018-09-23 19:32:23,674 INFO L226 Difference]: Without dead ends: 1332 [2018-09-23 19:32:23,675 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:32:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2018-09-23 19:32:23,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 1205. [2018-09-23 19:32:23,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2018-09-23 19:32:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1938 transitions. [2018-09-23 19:32:23,921 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1938 transitions. Word has length 16 [2018-09-23 19:32:23,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:23,921 INFO L480 AbstractCegarLoop]: Abstraction has 1205 states and 1938 transitions. [2018-09-23 19:32:23,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:32:23,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1938 transitions. [2018-09-23 19:32:23,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:32:23,922 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:23,922 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:23,923 INFO L423 AbstractCegarLoop]: === Iteration 35 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:23,923 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:23,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1823106549, now seen corresponding path program 1 times [2018-09-23 19:32:23,923 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:23,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:23,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:23,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:23,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:24,093 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:24,093 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:24,102 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:24,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:24,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:24,190 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:24,190 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2018-09-23 19:32:24,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-09-23 19:32:24,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-09-23 19:32:24,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2018-09-23 19:32:24,191 INFO L87 Difference]: Start difference. First operand 1205 states and 1938 transitions. Second operand 11 states. [2018-09-23 19:32:25,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:25,029 INFO L93 Difference]: Finished difference Result 1330 states and 2118 transitions. [2018-09-23 19:32:25,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-09-23 19:32:25,029 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 16 [2018-09-23 19:32:25,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:25,035 INFO L225 Difference]: With dead ends: 1330 [2018-09-23 19:32:25,035 INFO L226 Difference]: Without dead ends: 1328 [2018-09-23 19:32:25,036 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:32:25,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1328 states. [2018-09-23 19:32:25,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1328 to 1211. [2018-09-23 19:32:25,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1211 states. [2018-09-23 19:32:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1948 transitions. [2018-09-23 19:32:25,311 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1948 transitions. Word has length 16 [2018-09-23 19:32:25,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:25,311 INFO L480 AbstractCegarLoop]: Abstraction has 1211 states and 1948 transitions. [2018-09-23 19:32:25,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-09-23 19:32:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1948 transitions. [2018-09-23 19:32:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:32:25,312 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:25,312 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:25,313 INFO L423 AbstractCegarLoop]: === Iteration 36 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:25,313 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:25,313 INFO L82 PathProgramCache]: Analyzing trace with hash 481081049, now seen corresponding path program 2 times [2018-09-23 19:32:25,313 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:25,313 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:25,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:25,314 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:25,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:25,422 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:25,422 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:25,431 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:32:25,436 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:32:25,436 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:32:25,438 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:25,551 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:25,551 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2018-09-23 19:32:25,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:32:25,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:32:25,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:32:25,552 INFO L87 Difference]: Start difference. First operand 1211 states and 1948 transitions. Second operand 12 states. [2018-09-23 19:32:26,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:26,937 INFO L93 Difference]: Finished difference Result 1430 states and 2273 transitions. [2018-09-23 19:32:26,937 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-09-23 19:32:26,937 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2018-09-23 19:32:26,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:26,942 INFO L225 Difference]: With dead ends: 1430 [2018-09-23 19:32:26,942 INFO L226 Difference]: Without dead ends: 1428 [2018-09-23 19:32:26,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2018-09-23 19:32:26,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2018-09-23 19:32:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1205. [2018-09-23 19:32:27,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2018-09-23 19:32:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1938 transitions. [2018-09-23 19:32:27,193 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1938 transitions. Word has length 16 [2018-09-23 19:32:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:27,193 INFO L480 AbstractCegarLoop]: Abstraction has 1205 states and 1938 transitions. [2018-09-23 19:32:27,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:32:27,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1938 transitions. [2018-09-23 19:32:27,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-09-23 19:32:27,194 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:27,194 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:27,195 INFO L423 AbstractCegarLoop]: === Iteration 37 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:27,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:27,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1936399254, now seen corresponding path program 1 times [2018-09-23 19:32:27,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:27,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:27,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:27,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:32:27,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:27,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:27,846 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:27,847 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:27,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:27,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:27,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:28,329 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:28,329 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2018-09-23 19:32:28,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:32:28,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:32:28,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:32:28,330 INFO L87 Difference]: Start difference. First operand 1205 states and 1938 transitions. Second operand 13 states. [2018-09-23 19:32:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:30,082 INFO L93 Difference]: Finished difference Result 1432 states and 2278 transitions. [2018-09-23 19:32:30,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-09-23 19:32:30,083 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2018-09-23 19:32:30,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:30,087 INFO L225 Difference]: With dead ends: 1432 [2018-09-23 19:32:30,087 INFO L226 Difference]: Without dead ends: 1430 [2018-09-23 19:32:30,089 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2018-09-23 19:32:30,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2018-09-23 19:32:30,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1199. [2018-09-23 19:32:30,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1199 states. [2018-09-23 19:32:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1923 transitions. [2018-09-23 19:32:30,341 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1923 transitions. Word has length 16 [2018-09-23 19:32:30,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:30,341 INFO L480 AbstractCegarLoop]: Abstraction has 1199 states and 1923 transitions. [2018-09-23 19:32:30,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:32:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1923 transitions. [2018-09-23 19:32:30,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:30,342 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:30,342 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:30,343 INFO L423 AbstractCegarLoop]: === Iteration 38 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:30,343 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:30,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1085218294, now seen corresponding path program 1 times [2018-09-23 19:32:30,343 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:30,343 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:30,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:30,344 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:30,344 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:30,903 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:30,904 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:30,931 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:30,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:31,026 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2018-09-23 19:32:31,026 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 17 [2018-09-23 19:32:31,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:32:31,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:32:31,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:32:31,027 INFO L87 Difference]: Start difference. First operand 1199 states and 1923 transitions. Second operand 17 states. [2018-09-23 19:32:33,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:33,810 INFO L93 Difference]: Finished difference Result 1695 states and 2653 transitions. [2018-09-23 19:32:33,810 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:32:33,810 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2018-09-23 19:32:33,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:33,813 INFO L225 Difference]: With dead ends: 1695 [2018-09-23 19:32:33,813 INFO L226 Difference]: Without dead ends: 1376 [2018-09-23 19:32:33,814 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=596, Invalid=4660, Unknown=0, NotChecked=0, Total=5256 [2018-09-23 19:32:33,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2018-09-23 19:32:34,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1028. [2018-09-23 19:32:34,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1028 states. [2018-09-23 19:32:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1643 transitions. [2018-09-23 19:32:34,040 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1643 transitions. Word has length 18 [2018-09-23 19:32:34,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:34,040 INFO L480 AbstractCegarLoop]: Abstraction has 1028 states and 1643 transitions. [2018-09-23 19:32:34,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:32:34,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1643 transitions. [2018-09-23 19:32:34,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:34,041 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:34,041 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:34,042 INFO L423 AbstractCegarLoop]: === Iteration 39 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:34,042 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:34,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1597439053, now seen corresponding path program 1 times [2018-09-23 19:32:34,042 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:34,042 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:34,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:34,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:34,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:34,174 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:34,174 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:34,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:34,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:34,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:34,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:34,285 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2018-09-23 19:32:34,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:32:34,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:32:34,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:32:34,285 INFO L87 Difference]: Start difference. First operand 1028 states and 1643 transitions. Second operand 16 states. [2018-09-23 19:32:36,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:36,257 INFO L93 Difference]: Finished difference Result 1514 states and 2354 transitions. [2018-09-23 19:32:36,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-09-23 19:32:36,261 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-23 19:32:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:36,263 INFO L225 Difference]: With dead ends: 1514 [2018-09-23 19:32:36,263 INFO L226 Difference]: Without dead ends: 1219 [2018-09-23 19:32:36,265 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=383, Invalid=2067, Unknown=0, NotChecked=0, Total=2450 [2018-09-23 19:32:36,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2018-09-23 19:32:36,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1024. [2018-09-23 19:32:36,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2018-09-23 19:32:36,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1632 transitions. [2018-09-23 19:32:36,662 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1632 transitions. Word has length 18 [2018-09-23 19:32:36,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:36,662 INFO L480 AbstractCegarLoop]: Abstraction has 1024 states and 1632 transitions. [2018-09-23 19:32:36,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:32:36,663 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1632 transitions. [2018-09-23 19:32:36,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:36,664 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:36,664 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:36,664 INFO L423 AbstractCegarLoop]: === Iteration 40 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:36,664 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:36,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1672170852, now seen corresponding path program 1 times [2018-09-23 19:32:36,665 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:36,665 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:36,665 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:36,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:36,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:36,886 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2018-09-23 19:32:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:32:37,263 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:37,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:37,272 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:37,280 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:37,414 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:37,414 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2018-09-23 19:32:37,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:32:37,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:32:37,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:32:37,415 INFO L87 Difference]: Start difference. First operand 1024 states and 1632 transitions. Second operand 16 states. [2018-09-23 19:32:39,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:39,168 INFO L93 Difference]: Finished difference Result 2556 states and 4045 transitions. [2018-09-23 19:32:39,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-09-23 19:32:39,169 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2018-09-23 19:32:39,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:39,171 INFO L225 Difference]: With dead ends: 2556 [2018-09-23 19:32:39,171 INFO L226 Difference]: Without dead ends: 1529 [2018-09-23 19:32:39,174 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2018-09-23 19:32:39,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1529 states. [2018-09-23 19:32:39,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1529 to 1073. [2018-09-23 19:32:39,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1073 states. [2018-09-23 19:32:39,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 1703 transitions. [2018-09-23 19:32:39,442 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 1703 transitions. Word has length 18 [2018-09-23 19:32:39,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:39,442 INFO L480 AbstractCegarLoop]: Abstraction has 1073 states and 1703 transitions. [2018-09-23 19:32:39,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:32:39,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 1703 transitions. [2018-09-23 19:32:39,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:39,443 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:39,443 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:39,444 INFO L423 AbstractCegarLoop]: === Iteration 41 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:39,444 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:39,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1136854538, now seen corresponding path program 1 times [2018-09-23 19:32:39,444 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:39,444 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:39,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:39,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:39,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:39,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:39,573 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:39,574 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:39,574 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:39,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:39,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:39,592 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:39,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:39,698 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:39,699 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2018-09-23 19:32:39,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:32:39,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:32:39,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:39,699 INFO L87 Difference]: Start difference. First operand 1073 states and 1703 transitions. Second operand 15 states. [2018-09-23 19:32:41,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:41,312 INFO L93 Difference]: Finished difference Result 1546 states and 2389 transitions. [2018-09-23 19:32:41,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:32:41,313 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2018-09-23 19:32:41,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:41,315 INFO L225 Difference]: With dead ends: 1546 [2018-09-23 19:32:41,315 INFO L226 Difference]: Without dead ends: 1291 [2018-09-23 19:32:41,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2018-09-23 19:32:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2018-09-23 19:32:41,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 1056. [2018-09-23 19:32:41,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1056 states. [2018-09-23 19:32:41,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1674 transitions. [2018-09-23 19:32:41,659 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1674 transitions. Word has length 18 [2018-09-23 19:32:41,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:41,659 INFO L480 AbstractCegarLoop]: Abstraction has 1056 states and 1674 transitions. [2018-09-23 19:32:41,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:32:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1674 transitions. [2018-09-23 19:32:41,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-09-23 19:32:41,660 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:41,660 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:41,660 INFO L423 AbstractCegarLoop]: === Iteration 42 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:41,661 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:41,661 INFO L82 PathProgramCache]: Analyzing trace with hash 975863549, now seen corresponding path program 1 times [2018-09-23 19:32:41,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:41,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:41,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:41,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:41,662 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:41,724 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:41,724 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:41,731 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:41,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:41,739 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:41,763 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:41,763 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:32:41,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:32:41,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:32:41,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:32:41,765 INFO L87 Difference]: Start difference. First operand 1056 states and 1674 transitions. Second operand 7 states. [2018-09-23 19:32:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:42,501 INFO L93 Difference]: Finished difference Result 1635 states and 2515 transitions. [2018-09-23 19:32:42,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 19:32:42,502 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2018-09-23 19:32:42,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:42,505 INFO L225 Difference]: With dead ends: 1635 [2018-09-23 19:32:42,505 INFO L226 Difference]: Without dead ends: 1494 [2018-09-23 19:32:42,505 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:32:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2018-09-23 19:32:42,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1094. [2018-09-23 19:32:42,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1094 states. [2018-09-23 19:32:42,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1728 transitions. [2018-09-23 19:32:42,924 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1728 transitions. Word has length 18 [2018-09-23 19:32:42,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:42,925 INFO L480 AbstractCegarLoop]: Abstraction has 1094 states and 1728 transitions. [2018-09-23 19:32:42,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:32:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1728 transitions. [2018-09-23 19:32:42,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:32:42,926 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:42,926 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:32:42,926 INFO L423 AbstractCegarLoop]: === Iteration 43 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:42,926 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:42,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1152261854, now seen corresponding path program 1 times [2018-09-23 19:32:42,927 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:42,927 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:42,927 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:42,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:42,928 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:43,077 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:43,078 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:43,078 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:43,085 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:43,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:43,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:43,177 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:43,198 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:43,198 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 16 [2018-09-23 19:32:43,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:32:43,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:32:43,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:32:43,199 INFO L87 Difference]: Start difference. First operand 1094 states and 1728 transitions. Second operand 17 states. [2018-09-23 19:32:46,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:46,630 INFO L93 Difference]: Finished difference Result 2230 states and 3534 transitions. [2018-09-23 19:32:46,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:32:46,630 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2018-09-23 19:32:46,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:46,635 INFO L225 Difference]: With dead ends: 2230 [2018-09-23 19:32:46,635 INFO L226 Difference]: Without dead ends: 2180 [2018-09-23 19:32:46,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1477, Invalid=4529, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:32:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2018-09-23 19:32:47,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1150. [2018-09-23 19:32:47,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1150 states. [2018-09-23 19:32:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1853 transitions. [2018-09-23 19:32:47,113 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1853 transitions. Word has length 20 [2018-09-23 19:32:47,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:47,113 INFO L480 AbstractCegarLoop]: Abstraction has 1150 states and 1853 transitions. [2018-09-23 19:32:47,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:32:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1853 transitions. [2018-09-23 19:32:47,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:32:47,114 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:47,114 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:47,114 INFO L423 AbstractCegarLoop]: === Iteration 44 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:47,114 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:47,114 INFO L82 PathProgramCache]: Analyzing trace with hash -79326665, now seen corresponding path program 1 times [2018-09-23 19:32:47,115 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:47,115 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:47,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:47,115 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:47,115 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:47,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:32:47,234 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:47,234 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:47,241 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:47,252 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:32:47,277 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:47,277 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2018-09-23 19:32:47,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 19:32:47,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 19:32:47,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-09-23 19:32:47,278 INFO L87 Difference]: Start difference. First operand 1150 states and 1853 transitions. Second operand 7 states. [2018-09-23 19:32:47,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:47,873 INFO L93 Difference]: Finished difference Result 1760 states and 2751 transitions. [2018-09-23 19:32:47,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 19:32:47,873 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2018-09-23 19:32:47,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:47,875 INFO L225 Difference]: With dead ends: 1760 [2018-09-23 19:32:47,876 INFO L226 Difference]: Without dead ends: 1507 [2018-09-23 19:32:47,876 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2018-09-23 19:32:47,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2018-09-23 19:32:48,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 1026. [2018-09-23 19:32:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1026 states. [2018-09-23 19:32:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1655 transitions. [2018-09-23 19:32:48,139 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1655 transitions. Word has length 20 [2018-09-23 19:32:48,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:48,139 INFO L480 AbstractCegarLoop]: Abstraction has 1026 states and 1655 transitions. [2018-09-23 19:32:48,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 19:32:48,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1655 transitions. [2018-09-23 19:32:48,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-09-23 19:32:48,140 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:48,140 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-09-23 19:32:48,140 INFO L423 AbstractCegarLoop]: === Iteration 45 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:48,141 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:48,141 INFO L82 PathProgramCache]: Analyzing trace with hash -79325383, now seen corresponding path program 1 times [2018-09-23 19:32:48,141 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:48,141 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:48,141 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:48,141 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:48,142 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:48,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:48,367 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:48,367 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:48,375 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:48,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:48,488 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:48,488 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2018-09-23 19:32:48,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:32:48,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:32:48,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:32:48,489 INFO L87 Difference]: Start difference. First operand 1026 states and 1655 transitions. Second operand 13 states. [2018-09-23 19:32:50,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:50,567 INFO L93 Difference]: Finished difference Result 1878 states and 3019 transitions. [2018-09-23 19:32:50,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-09-23 19:32:50,568 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2018-09-23 19:32:50,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:50,571 INFO L225 Difference]: With dead ends: 1878 [2018-09-23 19:32:50,571 INFO L226 Difference]: Without dead ends: 1729 [2018-09-23 19:32:50,572 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=392, Invalid=1090, Unknown=0, NotChecked=0, Total=1482 [2018-09-23 19:32:50,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2018-09-23 19:32:50,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1013. [2018-09-23 19:32:50,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1013 states. [2018-09-23 19:32:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 1646 transitions. [2018-09-23 19:32:50,885 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 1646 transitions. Word has length 20 [2018-09-23 19:32:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:50,885 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 1646 transitions. [2018-09-23 19:32:50,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:32:50,886 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 1646 transitions. [2018-09-23 19:32:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:32:50,886 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:50,886 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:50,886 INFO L423 AbstractCegarLoop]: === Iteration 46 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:50,887 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:50,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1614386347, now seen corresponding path program 1 times [2018-09-23 19:32:50,887 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:50,887 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:50,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:50,888 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:50,888 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:32:51,008 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:51,008 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:51,017 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:51,027 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:51,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:51,201 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:51,202 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-23 19:32:51,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:32:51,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:32:51,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:32:51,202 INFO L87 Difference]: Start difference. First operand 1013 states and 1646 transitions. Second operand 20 states. [2018-09-23 19:32:54,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:54,856 INFO L93 Difference]: Finished difference Result 2738 states and 4441 transitions. [2018-09-23 19:32:54,856 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2018-09-23 19:32:54,856 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-23 19:32:54,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:54,858 INFO L225 Difference]: With dead ends: 2738 [2018-09-23 19:32:54,859 INFO L226 Difference]: Without dead ends: 1726 [2018-09-23 19:32:54,860 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2615 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1197, Invalid=6813, Unknown=0, NotChecked=0, Total=8010 [2018-09-23 19:32:54,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2018-09-23 19:32:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1481. [2018-09-23 19:32:55,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1481 states. [2018-09-23 19:32:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 2418 transitions. [2018-09-23 19:32:55,211 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 2418 transitions. Word has length 21 [2018-09-23 19:32:55,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:32:55,211 INFO L480 AbstractCegarLoop]: Abstraction has 1481 states and 2418 transitions. [2018-09-23 19:32:55,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:32:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 2418 transitions. [2018-09-23 19:32:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:32:55,212 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:32:55,212 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:32:55,213 INFO L423 AbstractCegarLoop]: === Iteration 47 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:32:55,213 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:32:55,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1615679213, now seen corresponding path program 1 times [2018-09-23 19:32:55,213 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:32:55,213 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:32:55,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:55,214 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:55,214 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:32:55,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:55,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:55,362 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:32:55,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:32:55,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:32:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:32:55,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:32:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:32:55,521 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:32:55,522 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-23 19:32:55,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:32:55,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:32:55,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:32:55,522 INFO L87 Difference]: Start difference. First operand 1481 states and 2418 transitions. Second operand 18 states. [2018-09-23 19:32:59,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:32:59,784 INFO L93 Difference]: Finished difference Result 2759 states and 4491 transitions. [2018-09-23 19:32:59,785 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-09-23 19:32:59,785 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-23 19:32:59,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:32:59,787 INFO L225 Difference]: With dead ends: 2759 [2018-09-23 19:32:59,787 INFO L226 Difference]: Without dead ends: 2757 [2018-09-23 19:32:59,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=899, Invalid=4503, Unknown=0, NotChecked=0, Total=5402 [2018-09-23 19:32:59,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2757 states. [2018-09-23 19:33:00,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2757 to 1886. [2018-09-23 19:33:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2018-09-23 19:33:00,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 3096 transitions. [2018-09-23 19:33:00,326 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 3096 transitions. Word has length 21 [2018-09-23 19:33:00,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:00,326 INFO L480 AbstractCegarLoop]: Abstraction has 1886 states and 3096 transitions. [2018-09-23 19:33:00,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:33:00,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 3096 transitions. [2018-09-23 19:33:00,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:33:00,327 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:00,327 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:00,327 INFO L423 AbstractCegarLoop]: === Iteration 48 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:00,327 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:00,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1336385522, now seen corresponding path program 1 times [2018-09-23 19:33:00,327 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:00,328 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:00,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:00,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:00,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:00,804 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:00,804 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:00,804 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:00,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:00,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:00,935 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:00,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2018-09-23 19:33:00,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:33:00,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:33:00,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:33:00,936 INFO L87 Difference]: Start difference. First operand 1886 states and 3096 transitions. Second operand 16 states. [2018-09-23 19:33:04,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:04,425 INFO L93 Difference]: Finished difference Result 2657 states and 4320 transitions. [2018-09-23 19:33:04,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-09-23 19:33:04,425 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2018-09-23 19:33:04,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:04,428 INFO L225 Difference]: With dead ends: 2657 [2018-09-23 19:33:04,428 INFO L226 Difference]: Without dead ends: 2655 [2018-09-23 19:33:04,429 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=659, Invalid=2647, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:33:04,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2655 states. [2018-09-23 19:33:04,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2655 to 1726. [2018-09-23 19:33:04,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1726 states. [2018-09-23 19:33:04,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1726 states to 1726 states and 2827 transitions. [2018-09-23 19:33:04,905 INFO L78 Accepts]: Start accepts. Automaton has 1726 states and 2827 transitions. Word has length 21 [2018-09-23 19:33:04,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:04,905 INFO L480 AbstractCegarLoop]: Abstraction has 1726 states and 2827 transitions. [2018-09-23 19:33:04,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:33:04,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1726 states and 2827 transitions. [2018-09-23 19:33:04,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:33:04,906 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:04,906 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:04,906 INFO L423 AbstractCegarLoop]: === Iteration 49 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:04,906 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:04,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1327798635, now seen corresponding path program 1 times [2018-09-23 19:33:04,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:04,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:04,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:04,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:04,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:04,998 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:04,998 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:05,006 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:05,015 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:05,189 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:05,189 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2018-09-23 19:33:05,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:33:05,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:33:05,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:33:05,190 INFO L87 Difference]: Start difference. First operand 1726 states and 2827 transitions. Second operand 17 states. [2018-09-23 19:33:09,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:09,132 INFO L93 Difference]: Finished difference Result 2434 states and 3937 transitions. [2018-09-23 19:33:09,132 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-09-23 19:33:09,132 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2018-09-23 19:33:09,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:09,135 INFO L225 Difference]: With dead ends: 2434 [2018-09-23 19:33:09,135 INFO L226 Difference]: Without dead ends: 2432 [2018-09-23 19:33:09,137 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=632, Invalid=3150, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:33:09,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2432 states. [2018-09-23 19:33:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2432 to 1872. [2018-09-23 19:33:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2018-09-23 19:33:09,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 3060 transitions. [2018-09-23 19:33:09,976 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 3060 transitions. Word has length 21 [2018-09-23 19:33:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:09,976 INFO L480 AbstractCegarLoop]: Abstraction has 1872 states and 3060 transitions. [2018-09-23 19:33:09,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:33:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 3060 transitions. [2018-09-23 19:33:09,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:33:09,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:09,978 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:09,978 INFO L423 AbstractCegarLoop]: === Iteration 50 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:09,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:09,978 INFO L82 PathProgramCache]: Analyzing trace with hash 133649308, now seen corresponding path program 2 times [2018-09-23 19:33:09,978 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:09,978 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:09,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:09,979 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:09,979 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:10,964 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:10,964 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:10,976 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:10,986 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:10,987 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:10,987 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:11,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:33:11,109 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:11,109 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 16 [2018-09-23 19:33:11,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:33:11,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:33:11,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:33:11,110 INFO L87 Difference]: Start difference. First operand 1872 states and 3060 transitions. Second operand 16 states. [2018-09-23 19:33:14,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:14,111 INFO L93 Difference]: Finished difference Result 2526 states and 4072 transitions. [2018-09-23 19:33:14,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-09-23 19:33:14,111 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 21 [2018-09-23 19:33:14,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:14,113 INFO L225 Difference]: With dead ends: 2526 [2018-09-23 19:33:14,113 INFO L226 Difference]: Without dead ends: 2334 [2018-09-23 19:33:14,114 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=543, Invalid=2763, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:33:14,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2018-09-23 19:33:14,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 2001. [2018-09-23 19:33:14,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2001 states. [2018-09-23 19:33:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2001 states to 2001 states and 3219 transitions. [2018-09-23 19:33:14,589 INFO L78 Accepts]: Start accepts. Automaton has 2001 states and 3219 transitions. Word has length 21 [2018-09-23 19:33:14,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:14,589 INFO L480 AbstractCegarLoop]: Abstraction has 2001 states and 3219 transitions. [2018-09-23 19:33:14,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:33:14,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2001 states and 3219 transitions. [2018-09-23 19:33:14,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:33:14,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:14,590 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:14,591 INFO L423 AbstractCegarLoop]: === Iteration 51 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:14,591 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:14,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1958649716, now seen corresponding path program 1 times [2018-09-23 19:33:14,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:14,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:14,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:14,592 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:14,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:14,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:14,688 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:14,688 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:14,696 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:14,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:14,704 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:15,174 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:15,174 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2018-09-23 19:33:15,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:33:15,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:33:15,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:33:15,175 INFO L87 Difference]: Start difference. First operand 2001 states and 3219 transitions. Second operand 18 states. [2018-09-23 19:33:20,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:20,062 INFO L93 Difference]: Finished difference Result 2607 states and 4131 transitions. [2018-09-23 19:33:20,062 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-09-23 19:33:20,062 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-23 19:33:20,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:20,065 INFO L225 Difference]: With dead ends: 2607 [2018-09-23 19:33:20,065 INFO L226 Difference]: Without dead ends: 2605 [2018-09-23 19:33:20,066 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1198, Invalid=4808, Unknown=0, NotChecked=0, Total=6006 [2018-09-23 19:33:20,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2018-09-23 19:33:20,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1559. [2018-09-23 19:33:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1559 states. [2018-09-23 19:33:20,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1559 states to 1559 states and 2486 transitions. [2018-09-23 19:33:20,527 INFO L78 Accepts]: Start accepts. Automaton has 1559 states and 2486 transitions. Word has length 21 [2018-09-23 19:33:20,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:20,527 INFO L480 AbstractCegarLoop]: Abstraction has 1559 states and 2486 transitions. [2018-09-23 19:33:20,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:33:20,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1559 states and 2486 transitions. [2018-09-23 19:33:20,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:33:20,529 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:20,529 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:20,529 INFO L423 AbstractCegarLoop]: === Iteration 52 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:20,529 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:20,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1950062829, now seen corresponding path program 1 times [2018-09-23 19:33:20,530 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:20,530 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:20,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:20,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:20,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:20,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:20,628 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:20,629 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:20,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:20,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:20,643 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:20,796 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:20,796 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2018-09-23 19:33:20,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:33:20,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:33:20,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:33:20,797 INFO L87 Difference]: Start difference. First operand 1559 states and 2486 transitions. Second operand 18 states. [2018-09-23 19:33:26,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:26,090 INFO L93 Difference]: Finished difference Result 2107 states and 3306 transitions. [2018-09-23 19:33:26,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2018-09-23 19:33:26,091 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-23 19:33:26,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:26,093 INFO L225 Difference]: With dead ends: 2107 [2018-09-23 19:33:26,093 INFO L226 Difference]: Without dead ends: 2105 [2018-09-23 19:33:26,094 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1282, Invalid=6200, Unknown=0, NotChecked=0, Total=7482 [2018-09-23 19:33:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2105 states. [2018-09-23 19:33:26,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2105 to 1432. [2018-09-23 19:33:26,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1432 states. [2018-09-23 19:33:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1432 states to 1432 states and 2283 transitions. [2018-09-23 19:33:26,534 INFO L78 Accepts]: Start accepts. Automaton has 1432 states and 2283 transitions. Word has length 21 [2018-09-23 19:33:26,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:26,534 INFO L480 AbstractCegarLoop]: Abstraction has 1432 states and 2283 transitions. [2018-09-23 19:33:26,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:33:26,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1432 states and 2283 transitions. [2018-09-23 19:33:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:33:26,535 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:26,536 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:26,536 INFO L423 AbstractCegarLoop]: === Iteration 53 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:26,536 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:26,536 INFO L82 PathProgramCache]: Analyzing trace with hash 830618954, now seen corresponding path program 2 times [2018-09-23 19:33:26,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:26,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:26,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:26,537 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:26,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:26,643 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:26,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:26,653 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:26,661 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:26,661 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:26,662 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:26,719 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:33:26,740 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:26,740 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2018-09-23 19:33:26,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:33:26,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:33:26,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:33:26,741 INFO L87 Difference]: Start difference. First operand 1432 states and 2283 transitions. Second operand 15 states. [2018-09-23 19:33:29,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:29,938 INFO L93 Difference]: Finished difference Result 1886 states and 2991 transitions. [2018-09-23 19:33:29,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:33:29,939 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2018-09-23 19:33:29,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:29,940 INFO L225 Difference]: With dead ends: 1886 [2018-09-23 19:33:29,941 INFO L226 Difference]: Without dead ends: 1884 [2018-09-23 19:33:29,941 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=644, Invalid=3138, Unknown=0, NotChecked=0, Total=3782 [2018-09-23 19:33:29,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2018-09-23 19:33:30,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1404. [2018-09-23 19:33:30,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1404 states. [2018-09-23 19:33:30,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 2237 transitions. [2018-09-23 19:33:30,354 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 2237 transitions. Word has length 21 [2018-09-23 19:33:30,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:30,354 INFO L480 AbstractCegarLoop]: Abstraction has 1404 states and 2237 transitions. [2018-09-23 19:33:30,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:33:30,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 2237 transitions. [2018-09-23 19:33:30,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:33:30,355 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:30,355 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:30,355 INFO L423 AbstractCegarLoop]: === Iteration 54 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:30,355 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:30,355 INFO L82 PathProgramCache]: Analyzing trace with hash 822030785, now seen corresponding path program 1 times [2018-09-23 19:33:30,355 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:30,355 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:30,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:30,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:30,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:33:30,545 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:30,545 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:30,553 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:30,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:30,748 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:30,748 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-09-23 19:33:30,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 19:33:30,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 19:33:30,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2018-09-23 19:33:30,749 INFO L87 Difference]: Start difference. First operand 1404 states and 2237 transitions. Second operand 20 states. [2018-09-23 19:33:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:35,781 INFO L93 Difference]: Finished difference Result 2676 states and 4218 transitions. [2018-09-23 19:33:35,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2018-09-23 19:33:35,781 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 21 [2018-09-23 19:33:35,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:35,783 INFO L225 Difference]: With dead ends: 2676 [2018-09-23 19:33:35,783 INFO L226 Difference]: Without dead ends: 1637 [2018-09-23 19:33:35,784 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1444, Invalid=7486, Unknown=0, NotChecked=0, Total=8930 [2018-09-23 19:33:35,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1637 states. [2018-09-23 19:33:36,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1637 to 1391. [2018-09-23 19:33:36,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1391 states. [2018-09-23 19:33:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1391 states to 1391 states and 2209 transitions. [2018-09-23 19:33:36,250 INFO L78 Accepts]: Start accepts. Automaton has 1391 states and 2209 transitions. Word has length 21 [2018-09-23 19:33:36,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:36,250 INFO L480 AbstractCegarLoop]: Abstraction has 1391 states and 2209 transitions. [2018-09-23 19:33:36,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 19:33:36,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1391 states and 2209 transitions. [2018-09-23 19:33:36,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:33:36,251 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:36,252 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:36,252 INFO L423 AbstractCegarLoop]: === Iteration 55 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:36,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:36,252 INFO L82 PathProgramCache]: Analyzing trace with hash 822032067, now seen corresponding path program 2 times [2018-09-23 19:33:36,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:36,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:36,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:36,253 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:36,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:36,349 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:36,350 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:36,357 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:36,365 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:36,365 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:36,366 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:33:36,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:36,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 17 [2018-09-23 19:33:36,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 19:33:36,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 19:33:36,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2018-09-23 19:33:36,525 INFO L87 Difference]: Start difference. First operand 1391 states and 2209 transitions. Second operand 18 states. [2018-09-23 19:33:41,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:41,098 INFO L93 Difference]: Finished difference Result 2169 states and 3390 transitions. [2018-09-23 19:33:41,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2018-09-23 19:33:41,098 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2018-09-23 19:33:41,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:41,100 INFO L225 Difference]: With dead ends: 2169 [2018-09-23 19:33:41,100 INFO L226 Difference]: Without dead ends: 2167 [2018-09-23 19:33:41,101 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1116, Invalid=5856, Unknown=0, NotChecked=0, Total=6972 [2018-09-23 19:33:41,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2167 states. [2018-09-23 19:33:41,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2167 to 1375. [2018-09-23 19:33:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1375 states. [2018-09-23 19:33:41,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 2186 transitions. [2018-09-23 19:33:41,589 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 2186 transitions. Word has length 21 [2018-09-23 19:33:41,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:41,589 INFO L480 AbstractCegarLoop]: Abstraction has 1375 states and 2186 transitions. [2018-09-23 19:33:41,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 19:33:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 2186 transitions. [2018-09-23 19:33:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:33:41,590 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:41,590 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:41,590 INFO L423 AbstractCegarLoop]: === Iteration 56 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:41,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:41,591 INFO L82 PathProgramCache]: Analyzing trace with hash -97849607, now seen corresponding path program 1 times [2018-09-23 19:33:41,591 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:41,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:41,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:41,591 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:41,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:33:41,715 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:41,715 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:41,723 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:41,731 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:41,895 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:41,895 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-23 19:33:41,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:33:41,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:33:41,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:33:41,896 INFO L87 Difference]: Start difference. First operand 1375 states and 2186 transitions. Second operand 19 states. [2018-09-23 19:33:45,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:45,142 INFO L93 Difference]: Finished difference Result 3096 states and 4913 transitions. [2018-09-23 19:33:45,142 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:33:45,142 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2018-09-23 19:33:45,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:45,144 INFO L225 Difference]: With dead ends: 3096 [2018-09-23 19:33:45,144 INFO L226 Difference]: Without dead ends: 1770 [2018-09-23 19:33:45,146 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=571, Invalid=2735, Unknown=0, NotChecked=0, Total=3306 [2018-09-23 19:33:45,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2018-09-23 19:33:45,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1381. [2018-09-23 19:33:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1381 states. [2018-09-23 19:33:45,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 2193 transitions. [2018-09-23 19:33:45,666 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 2193 transitions. Word has length 21 [2018-09-23 19:33:45,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:45,666 INFO L480 AbstractCegarLoop]: Abstraction has 1381 states and 2193 transitions. [2018-09-23 19:33:45,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:33:45,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 2193 transitions. [2018-09-23 19:33:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:33:45,667 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:45,667 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:45,667 INFO L423 AbstractCegarLoop]: === Iteration 57 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:45,667 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:45,668 INFO L82 PathProgramCache]: Analyzing trace with hash 437466707, now seen corresponding path program 1 times [2018-09-23 19:33:45,668 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:45,668 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:45,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:45,668 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:45,668 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:45,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:45,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:45,761 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:45,761 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:45,770 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:45,777 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:33:45,860 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:45,860 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2018-09-23 19:33:45,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:33:45,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:33:45,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:33:45,861 INFO L87 Difference]: Start difference. First operand 1381 states and 2193 transitions. Second operand 13 states. [2018-09-23 19:33:47,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:47,743 INFO L93 Difference]: Finished difference Result 1858 states and 2972 transitions. [2018-09-23 19:33:47,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:33:47,743 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2018-09-23 19:33:47,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:47,745 INFO L225 Difference]: With dead ends: 1858 [2018-09-23 19:33:47,745 INFO L226 Difference]: Without dead ends: 1856 [2018-09-23 19:33:47,746 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2018-09-23 19:33:47,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2018-09-23 19:33:48,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1551. [2018-09-23 19:33:48,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1551 states. [2018-09-23 19:33:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 2486 transitions. [2018-09-23 19:33:48,297 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 2486 transitions. Word has length 21 [2018-09-23 19:33:48,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:48,297 INFO L480 AbstractCegarLoop]: Abstraction has 1551 states and 2486 transitions. [2018-09-23 19:33:48,297 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:33:48,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 2486 transitions. [2018-09-23 19:33:48,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:33:48,298 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:48,298 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:48,298 INFO L423 AbstractCegarLoop]: === Iteration 58 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:48,299 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:48,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2130898623, now seen corresponding path program 2 times [2018-09-23 19:33:48,299 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:48,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:48,299 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:48,299 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:48,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:33:48,411 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:48,411 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:48,429 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:48,439 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:48,440 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:48,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:33:48,643 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:48,643 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-09-23 19:33:48,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 19:33:48,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 19:33:48,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2018-09-23 19:33:48,644 INFO L87 Difference]: Start difference. First operand 1551 states and 2486 transitions. Second operand 19 states. [2018-09-23 19:33:52,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:52,235 INFO L93 Difference]: Finished difference Result 1901 states and 3071 transitions. [2018-09-23 19:33:52,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-09-23 19:33:52,235 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2018-09-23 19:33:52,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:52,237 INFO L225 Difference]: With dead ends: 1901 [2018-09-23 19:33:52,237 INFO L226 Difference]: Without dead ends: 1899 [2018-09-23 19:33:52,238 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=509, Invalid=3031, Unknown=0, NotChecked=0, Total=3540 [2018-09-23 19:33:52,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2018-09-23 19:33:52,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1583. [2018-09-23 19:33:52,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1583 states. [2018-09-23 19:33:52,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2523 transitions. [2018-09-23 19:33:52,796 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2523 transitions. Word has length 21 [2018-09-23 19:33:52,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:52,796 INFO L480 AbstractCegarLoop]: Abstraction has 1583 states and 2523 transitions. [2018-09-23 19:33:52,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 19:33:52,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2523 transitions. [2018-09-23 19:33:52,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:33:52,797 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:52,797 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:52,798 INFO L423 AbstractCegarLoop]: === Iteration 59 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:52,798 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:52,798 INFO L82 PathProgramCache]: Analyzing trace with hash -2139486792, now seen corresponding path program 1 times [2018-09-23 19:33:52,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:52,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:52,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:52,799 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:33:52,799 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:53,150 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:53,150 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:53,159 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:53,168 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:53,229 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:33:53,250 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:53,250 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2018-09-23 19:33:53,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 19:33:53,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 19:33:53,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-09-23 19:33:53,251 INFO L87 Difference]: Start difference. First operand 1583 states and 2523 transitions. Second operand 13 states. [2018-09-23 19:33:56,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:33:56,231 INFO L93 Difference]: Finished difference Result 2207 states and 3564 transitions. [2018-09-23 19:33:56,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:33:56,231 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2018-09-23 19:33:56,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:33:56,233 INFO L225 Difference]: With dead ends: 2207 [2018-09-23 19:33:56,233 INFO L226 Difference]: Without dead ends: 2205 [2018-09-23 19:33:56,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2018-09-23 19:33:56,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2205 states. [2018-09-23 19:33:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2205 to 1741. [2018-09-23 19:33:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1741 states. [2018-09-23 19:33:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 2777 transitions. [2018-09-23 19:33:56,835 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 2777 transitions. Word has length 21 [2018-09-23 19:33:56,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:33:56,835 INFO L480 AbstractCegarLoop]: Abstraction has 1741 states and 2777 transitions. [2018-09-23 19:33:56,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 19:33:56,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 2777 transitions. [2018-09-23 19:33:56,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:33:56,836 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:33:56,836 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:33:56,836 INFO L423 AbstractCegarLoop]: === Iteration 60 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:33:56,836 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:33:56,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1673653662, now seen corresponding path program 2 times [2018-09-23 19:33:56,836 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:33:56,837 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:33:56,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:56,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:33:56,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:33:56,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:33:56,914 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:56,914 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:33:56,914 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:33:56,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:33:56,930 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:33:56,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:33:56,931 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:33:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:33:57,052 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:33:57,053 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-09-23 19:33:57,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:33:57,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:33:57,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:33:57,053 INFO L87 Difference]: Start difference. First operand 1741 states and 2777 transitions. Second operand 15 states. [2018-09-23 19:34:01,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:01,410 INFO L93 Difference]: Finished difference Result 3370 states and 5507 transitions. [2018-09-23 19:34:01,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-09-23 19:34:01,411 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 21 [2018-09-23 19:34:01,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:01,414 INFO L225 Difference]: With dead ends: 3370 [2018-09-23 19:34:01,414 INFO L226 Difference]: Without dead ends: 3368 [2018-09-23 19:34:01,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=719, Invalid=2941, Unknown=0, NotChecked=0, Total=3660 [2018-09-23 19:34:01,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3368 states. [2018-09-23 19:34:02,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3368 to 2044. [2018-09-23 19:34:02,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2044 states. [2018-09-23 19:34:02,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2044 states to 2044 states and 3284 transitions. [2018-09-23 19:34:02,116 INFO L78 Accepts]: Start accepts. Automaton has 2044 states and 3284 transitions. Word has length 21 [2018-09-23 19:34:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:02,116 INFO L480 AbstractCegarLoop]: Abstraction has 2044 states and 3284 transitions. [2018-09-23 19:34:02,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:34:02,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2044 states and 3284 transitions. [2018-09-23 19:34:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-09-23 19:34:02,117 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:02,117 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:34:02,117 INFO L423 AbstractCegarLoop]: === Iteration 61 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:02,117 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:02,117 INFO L82 PathProgramCache]: Analyzing trace with hash 212422270, now seen corresponding path program 2 times [2018-09-23 19:34:02,117 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:02,117 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:02,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:02,118 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:02,118 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:02,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-09-23 19:34:02,181 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:02,181 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:02,189 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 19:34:02,198 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 19:34:02,198 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:02,199 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2018-09-23 19:34:02,284 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:02,284 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-09-23 19:34:02,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 19:34:02,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 19:34:02,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2018-09-23 19:34:02,285 INFO L87 Difference]: Start difference. First operand 2044 states and 3284 transitions. Second operand 12 states. [2018-09-23 19:34:05,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:05,026 INFO L93 Difference]: Finished difference Result 5216 states and 8321 transitions. [2018-09-23 19:34:05,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 19:34:05,027 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 21 [2018-09-23 19:34:05,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:05,030 INFO L225 Difference]: With dead ends: 5216 [2018-09-23 19:34:05,030 INFO L226 Difference]: Without dead ends: 3229 [2018-09-23 19:34:05,032 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=517, Invalid=1835, Unknown=0, NotChecked=0, Total=2352 [2018-09-23 19:34:05,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3229 states. [2018-09-23 19:34:06,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3229 to 2942. [2018-09-23 19:34:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2942 states. [2018-09-23 19:34:06,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 4622 transitions. [2018-09-23 19:34:06,153 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 4622 transitions. Word has length 21 [2018-09-23 19:34:06,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:06,153 INFO L480 AbstractCegarLoop]: Abstraction has 2942 states and 4622 transitions. [2018-09-23 19:34:06,153 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 19:34:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 4622 transitions. [2018-09-23 19:34:06,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:34:06,155 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:06,155 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:34:06,155 INFO L423 AbstractCegarLoop]: === Iteration 62 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:06,155 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:06,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1977173104, now seen corresponding path program 1 times [2018-09-23 19:34:06,155 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:06,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:06,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:06,156 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:06,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:06,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:06,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:06,301 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:06,301 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:06,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:06,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:06,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:06,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:06,524 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:06,524 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 21 [2018-09-23 19:34:06,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:34:06,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:34:06,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:34:06,525 INFO L87 Difference]: Start difference. First operand 2942 states and 4622 transitions. Second operand 22 states. [2018-09-23 19:34:14,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:14,936 INFO L93 Difference]: Finished difference Result 4706 states and 7339 transitions. [2018-09-23 19:34:14,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2018-09-23 19:34:14,936 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2018-09-23 19:34:14,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:14,941 INFO L225 Difference]: With dead ends: 4706 [2018-09-23 19:34:14,941 INFO L226 Difference]: Without dead ends: 4704 [2018-09-23 19:34:14,942 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5067 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2033, Invalid=12009, Unknown=0, NotChecked=0, Total=14042 [2018-09-23 19:34:14,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2018-09-23 19:34:16,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3514. [2018-09-23 19:34:16,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3514 states. [2018-09-23 19:34:16,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3514 states to 3514 states and 5500 transitions. [2018-09-23 19:34:16,404 INFO L78 Accepts]: Start accepts. Automaton has 3514 states and 5500 transitions. Word has length 23 [2018-09-23 19:34:16,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:16,405 INFO L480 AbstractCegarLoop]: Abstraction has 3514 states and 5500 transitions. [2018-09-23 19:34:16,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:34:16,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3514 states and 5500 transitions. [2018-09-23 19:34:16,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:34:16,406 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:16,406 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:34:16,406 INFO L423 AbstractCegarLoop]: === Iteration 63 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:16,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:16,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1266805704, now seen corresponding path program 1 times [2018-09-23 19:34:16,407 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:16,407 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:16,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:16,407 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:16,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:16,555 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:16,555 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:16,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:16,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:16,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:34:16,741 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:16,742 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 20 [2018-09-23 19:34:16,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 19:34:16,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 19:34:16,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2018-09-23 19:34:16,742 INFO L87 Difference]: Start difference. First operand 3514 states and 5500 transitions. Second operand 21 states. [2018-09-23 19:34:23,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:23,673 INFO L93 Difference]: Finished difference Result 4911 states and 7636 transitions. [2018-09-23 19:34:23,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-09-23 19:34:23,674 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2018-09-23 19:34:23,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:23,677 INFO L225 Difference]: With dead ends: 4911 [2018-09-23 19:34:23,678 INFO L226 Difference]: Without dead ends: 4904 [2018-09-23 19:34:23,678 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=802, Invalid=3890, Unknown=0, NotChecked=0, Total=4692 [2018-09-23 19:34:23,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4904 states. [2018-09-23 19:34:25,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4904 to 2925. [2018-09-23 19:34:25,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2925 states. [2018-09-23 19:34:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2925 states to 2925 states and 4501 transitions. [2018-09-23 19:34:25,409 INFO L78 Accepts]: Start accepts. Automaton has 2925 states and 4501 transitions. Word has length 23 [2018-09-23 19:34:25,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:25,409 INFO L480 AbstractCegarLoop]: Abstraction has 2925 states and 4501 transitions. [2018-09-23 19:34:25,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 19:34:25,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2925 states and 4501 transitions. [2018-09-23 19:34:25,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-09-23 19:34:25,411 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:25,411 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:34:25,411 INFO L423 AbstractCegarLoop]: === Iteration 64 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:25,411 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:25,411 INFO L82 PathProgramCache]: Analyzing trace with hash -407447728, now seen corresponding path program 1 times [2018-09-23 19:34:25,411 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:25,412 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:25,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:25,412 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:25,412 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:25,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:25,682 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:25,682 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:25,689 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:25,698 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:34:25,863 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:25,863 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2018-09-23 19:34:25,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 19:34:25,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 19:34:25,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2018-09-23 19:34:25,864 INFO L87 Difference]: Start difference. First operand 2925 states and 4501 transitions. Second operand 22 states. [2018-09-23 19:34:31,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:31,242 INFO L93 Difference]: Finished difference Result 3641 states and 5640 transitions. [2018-09-23 19:34:31,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-09-23 19:34:31,243 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 23 [2018-09-23 19:34:31,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:31,246 INFO L225 Difference]: With dead ends: 3641 [2018-09-23 19:34:31,246 INFO L226 Difference]: Without dead ends: 3634 [2018-09-23 19:34:31,246 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=768, Invalid=3788, Unknown=0, NotChecked=0, Total=4556 [2018-09-23 19:34:31,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3634 states. [2018-09-23 19:34:32,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3634 to 2472. [2018-09-23 19:34:32,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2472 states. [2018-09-23 19:34:32,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 3826 transitions. [2018-09-23 19:34:32,463 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 3826 transitions. Word has length 23 [2018-09-23 19:34:32,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:32,463 INFO L480 AbstractCegarLoop]: Abstraction has 2472 states and 3826 transitions. [2018-09-23 19:34:32,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 19:34:32,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 3826 transitions. [2018-09-23 19:34:32,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:34:32,465 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:32,465 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:34:32,465 INFO L423 AbstractCegarLoop]: === Iteration 65 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:32,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:32,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1545525427, now seen corresponding path program 1 times [2018-09-23 19:34:32,466 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:32,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:32,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:32,466 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:32,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:32,599 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:32,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:32,611 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:32,620 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:32,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:34:32,766 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:32,766 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 14 [2018-09-23 19:34:32,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:34:32,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:34:32,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:34:32,766 INFO L87 Difference]: Start difference. First operand 2472 states and 3826 transitions. Second operand 15 states. [2018-09-23 19:34:36,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:36,687 INFO L93 Difference]: Finished difference Result 3028 states and 4680 transitions. [2018-09-23 19:34:36,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-09-23 19:34:36,688 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2018-09-23 19:34:36,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:36,691 INFO L225 Difference]: With dead ends: 3028 [2018-09-23 19:34:36,691 INFO L226 Difference]: Without dead ends: 3026 [2018-09-23 19:34:36,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2018-09-23 19:34:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3026 states. [2018-09-23 19:34:38,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3026 to 2443. [2018-09-23 19:34:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2443 states. [2018-09-23 19:34:38,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 3774 transitions. [2018-09-23 19:34:38,030 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 3774 transitions. Word has length 24 [2018-09-23 19:34:38,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:38,030 INFO L480 AbstractCegarLoop]: Abstraction has 2443 states and 3774 transitions. [2018-09-23 19:34:38,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:34:38,030 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 3774 transitions. [2018-09-23 19:34:38,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:34:38,031 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:38,031 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2018-09-23 19:34:38,031 INFO L423 AbstractCegarLoop]: === Iteration 66 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:38,031 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:38,032 INFO L82 PathProgramCache]: Analyzing trace with hash -136248690, now seen corresponding path program 3 times [2018-09-23 19:34:38,032 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:38,032 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:38,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:38,032 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:38,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:38,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:38,258 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-09-23 19:34:38,259 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:38,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:38,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 19:34:38,273 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2018-09-23 19:34:38,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:34:38,274 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2018-09-23 19:34:38,423 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:38,423 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2018-09-23 19:34:38,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 19:34:38,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 19:34:38,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2018-09-23 19:34:38,424 INFO L87 Difference]: Start difference. First operand 2443 states and 3774 transitions. Second operand 15 states. [2018-09-23 19:34:41,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:41,443 INFO L93 Difference]: Finished difference Result 2592 states and 4005 transitions. [2018-09-23 19:34:41,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-09-23 19:34:41,443 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2018-09-23 19:34:41,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:41,446 INFO L225 Difference]: With dead ends: 2592 [2018-09-23 19:34:41,446 INFO L226 Difference]: Without dead ends: 2590 [2018-09-23 19:34:41,446 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=319, Invalid=1087, Unknown=0, NotChecked=0, Total=1406 [2018-09-23 19:34:41,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2590 states. [2018-09-23 19:34:42,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2590 to 2279. [2018-09-23 19:34:42,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2279 states. [2018-09-23 19:34:42,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2279 states to 2279 states and 3506 transitions. [2018-09-23 19:34:42,790 INFO L78 Accepts]: Start accepts. Automaton has 2279 states and 3506 transitions. Word has length 24 [2018-09-23 19:34:42,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:42,790 INFO L480 AbstractCegarLoop]: Abstraction has 2279 states and 3506 transitions. [2018-09-23 19:34:42,790 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 19:34:42,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2279 states and 3506 transitions. [2018-09-23 19:34:42,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 19:34:42,791 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:42,791 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:34:42,791 INFO L423 AbstractCegarLoop]: === Iteration 67 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:42,791 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:42,792 INFO L82 PathProgramCache]: Analyzing trace with hash -518454402, now seen corresponding path program 1 times [2018-09-23 19:34:42,792 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:42,792 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:42,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:42,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:34:42,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:42,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 19:34:42,938 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:42,938 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:42,949 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:42,959 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:34:43,048 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:43,048 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2018-09-23 19:34:43,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:34:43,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:34:43,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:34:43,049 INFO L87 Difference]: Start difference. First operand 2279 states and 3506 transitions. Second operand 16 states. [2018-09-23 19:34:46,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:46,346 INFO L93 Difference]: Finished difference Result 2414 states and 3709 transitions. [2018-09-23 19:34:46,346 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:34:46,346 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 24 [2018-09-23 19:34:46,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:46,348 INFO L225 Difference]: With dead ends: 2414 [2018-09-23 19:34:46,348 INFO L226 Difference]: Without dead ends: 2412 [2018-09-23 19:34:46,349 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=236, Invalid=1404, Unknown=0, NotChecked=0, Total=1640 [2018-09-23 19:34:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2018-09-23 19:34:47,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 2274. [2018-09-23 19:34:47,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2274 states. [2018-09-23 19:34:47,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2274 states to 2274 states and 3496 transitions. [2018-09-23 19:34:47,703 INFO L78 Accepts]: Start accepts. Automaton has 2274 states and 3496 transitions. Word has length 24 [2018-09-23 19:34:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:47,703 INFO L480 AbstractCegarLoop]: Abstraction has 2274 states and 3496 transitions. [2018-09-23 19:34:47,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:34:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2274 states and 3496 transitions. [2018-09-23 19:34:47,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:34:47,705 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:47,705 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:34:47,705 INFO L423 AbstractCegarLoop]: === Iteration 68 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:47,705 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:47,705 INFO L82 PathProgramCache]: Analyzing trace with hash -916627202, now seen corresponding path program 1 times [2018-09-23 19:34:47,705 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:47,706 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:47,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:47,706 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:47,706 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:34:48,024 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:48,025 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:48,038 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:48,053 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-23 19:34:48,151 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:48,151 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2018-09-23 19:34:48,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 19:34:48,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 19:34:48,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2018-09-23 19:34:48,152 INFO L87 Difference]: Start difference. First operand 2274 states and 3496 transitions. Second operand 16 states. [2018-09-23 19:34:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:34:51,850 INFO L93 Difference]: Finished difference Result 2734 states and 4210 transitions. [2018-09-23 19:34:51,850 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-09-23 19:34:51,850 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 29 [2018-09-23 19:34:51,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:34:51,852 INFO L225 Difference]: With dead ends: 2734 [2018-09-23 19:34:51,852 INFO L226 Difference]: Without dead ends: 2732 [2018-09-23 19:34:51,853 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=309, Invalid=1497, Unknown=0, NotChecked=0, Total=1806 [2018-09-23 19:34:51,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2018-09-23 19:34:53,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2357. [2018-09-23 19:34:53,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2357 states. [2018-09-23 19:34:53,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 3634 transitions. [2018-09-23 19:34:53,313 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 3634 transitions. Word has length 29 [2018-09-23 19:34:53,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:34:53,313 INFO L480 AbstractCegarLoop]: Abstraction has 2357 states and 3634 transitions. [2018-09-23 19:34:53,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 19:34:53,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 3634 transitions. [2018-09-23 19:34:53,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:34:53,315 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:34:53,315 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:34:53,315 INFO L423 AbstractCegarLoop]: === Iteration 69 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:34:53,315 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:34:53,315 INFO L82 PathProgramCache]: Analyzing trace with hash 524508242, now seen corresponding path program 1 times [2018-09-23 19:34:53,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:34:53,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:34:53,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:53,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:53,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:34:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:34:53,440 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:34:53,440 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:34:53,449 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:34:53,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:34:53,460 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:34:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:34:53,591 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:34:53,591 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-09-23 19:34:53,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:34:53,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:34:53,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:34:53,592 INFO L87 Difference]: Start difference. First operand 2357 states and 3634 transitions. Second operand 17 states. [2018-09-23 19:35:02,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:02,972 INFO L93 Difference]: Finished difference Result 5146 states and 8058 transitions. [2018-09-23 19:35:02,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2018-09-23 19:35:02,972 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2018-09-23 19:35:02,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:02,976 INFO L225 Difference]: With dead ends: 5146 [2018-09-23 19:35:02,976 INFO L226 Difference]: Without dead ends: 5144 [2018-09-23 19:35:02,977 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1591, Invalid=7915, Unknown=0, NotChecked=0, Total=9506 [2018-09-23 19:35:02,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2018-09-23 19:35:04,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 3465. [2018-09-23 19:35:04,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3465 states. [2018-09-23 19:35:04,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3465 states to 3465 states and 5438 transitions. [2018-09-23 19:35:04,917 INFO L78 Accepts]: Start accepts. Automaton has 3465 states and 5438 transitions. Word has length 29 [2018-09-23 19:35:04,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:04,917 INFO L480 AbstractCegarLoop]: Abstraction has 3465 states and 5438 transitions. [2018-09-23 19:35:04,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:35:04,917 INFO L276 IsEmpty]: Start isEmpty. Operand 3465 states and 5438 transitions. [2018-09-23 19:35:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-09-23 19:35:04,919 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:04,919 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 19:35:04,919 INFO L423 AbstractCegarLoop]: === Iteration 70 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:04,919 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:04,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1958472419, now seen corresponding path program 4 times [2018-09-23 19:35:04,919 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:04,919 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:04,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:04,920 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:04,920 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:35:05,099 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:05,099 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:05,108 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 19:35:05,119 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 19:35:05,119 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 19:35:05,121 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:35:05,405 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:05,406 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-09-23 19:35:05,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-09-23 19:35:05,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-09-23 19:35:05,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2018-09-23 19:35:05,406 INFO L87 Difference]: Start difference. First operand 3465 states and 5438 transitions. Second operand 17 states. [2018-09-23 19:35:14,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 19:35:14,479 INFO L93 Difference]: Finished difference Result 4974 states and 7795 transitions. [2018-09-23 19:35:14,480 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2018-09-23 19:35:14,480 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 29 [2018-09-23 19:35:14,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 19:35:14,484 INFO L225 Difference]: With dead ends: 4974 [2018-09-23 19:35:14,484 INFO L226 Difference]: Without dead ends: 4972 [2018-09-23 19:35:14,484 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1978 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1292, Invalid=5350, Unknown=0, NotChecked=0, Total=6642 [2018-09-23 19:35:14,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4972 states. [2018-09-23 19:35:16,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4972 to 3050. [2018-09-23 19:35:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3050 states. [2018-09-23 19:35:16,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3050 states to 3050 states and 4722 transitions. [2018-09-23 19:35:16,246 INFO L78 Accepts]: Start accepts. Automaton has 3050 states and 4722 transitions. Word has length 29 [2018-09-23 19:35:16,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 19:35:16,246 INFO L480 AbstractCegarLoop]: Abstraction has 3050 states and 4722 transitions. [2018-09-23 19:35:16,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-09-23 19:35:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3050 states and 4722 transitions. [2018-09-23 19:35:16,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-09-23 19:35:16,248 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 19:35:16,248 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-09-23 19:35:16,248 INFO L423 AbstractCegarLoop]: === Iteration 71 === [productErr1ASSERT_VIOLATIONASSERT, productErr3ASSERT_VIOLATIONASSERT, productErr2ASSERT_VIOLATIONASSERT, productErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 19:35:16,248 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 19:35:16,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1748672885, now seen corresponding path program 1 times [2018-09-23 19:35:16,248 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 19:35:16,248 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 19:35:16,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:16,249 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 19:35:16,249 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 19:35:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:35:16,528 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 19:35:16,528 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 19:35:16,538 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 19:35:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 19:35:16,552 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 19:35:16,750 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2018-09-23 19:35:16,770 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 19:35:16,771 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 23 [2018-09-23 19:35:16,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-09-23 19:35:16,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-09-23 19:35:16,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=491, Unknown=0, NotChecked=0, Total=552 [2018-09-23 19:35:16,771 INFO L87 Difference]: Start difference. First operand 3050 states and 4722 transitions. Second operand 24 states. Received shutdown request... [2018-09-23 19:35:34,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2018-09-23 19:35:34,885 WARN L549 AbstractCegarLoop]: Verification canceled [2018-09-23 19:35:34,890 WARN L206 ceAbstractionStarter]: Timeout [2018-09-23 19:35:34,891 INFO L202 PluginConnector]: Adding new model threadpooling_product.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.09 07:35:34 BoogieIcfgContainer [2018-09-23 19:35:34,891 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-09-23 19:35:34,892 INFO L168 Benchmark]: Toolchain (without parser) took 250004.13 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 785.4 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -147.7 MB). Peak memory consumption was 637.7 MB. Max. memory is 7.1 GB. [2018-09-23 19:35:34,892 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:35:34,893 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.75 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:35:34,893 INFO L168 Benchmark]: Boogie Preprocessor took 29.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 19:35:34,893 INFO L168 Benchmark]: RCFGBuilder took 570.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 19:35:34,893 INFO L168 Benchmark]: TraceAbstraction took 249350.79 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 785.4 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -168.8 MB). Peak memory consumption was 616.6 MB. Max. memory is 7.1 GB. [2018-09-23 19:35:34,895 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 0.21 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 46.75 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.16 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 570.95 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 249350.79 ms. Allocated memory was 1.5 GB in the beginning and 2.3 GB in the end (delta: 785.4 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -168.8 MB). Peak memory consumption was 616.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 74). Cancelled while BasicCegarLoop was constructing difference of abstraction (3050states) and FLOYD_HOARE automaton (currently 198 states, 24 states before enhancement), while ReachableStatesComputation was computing reachable states (4184 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 94). Cancelled while BasicCegarLoop was constructing difference of abstraction (3050states) and FLOYD_HOARE automaton (currently 198 states, 24 states before enhancement), while ReachableStatesComputation was computing reachable states (4184 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 85). Cancelled while BasicCegarLoop was constructing difference of abstraction (3050states) and FLOYD_HOARE automaton (currently 198 states, 24 states before enhancement), while ReachableStatesComputation was computing reachable states (4184 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 45). Cancelled while BasicCegarLoop was constructing difference of abstraction (3050states) and FLOYD_HOARE automaton (currently 198 states, 24 states before enhancement), while ReachableStatesComputation was computing reachable states (4184 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 23 locations, 4 error locations. TIMEOUT Result, 249.2s OverallTime, 71 OverallIterations, 5 TraceHistogramMax, 193.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 2671 SDtfs, 13871 SDslu, 9542 SDs, 0 SdLazy, 78570 SolverSat, 7621 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4000 GetRequests, 787 SyntacticMatches, 22 SemanticMatches, 3191 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 67809 ImplicationChecksByTransitivity, 86.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3514occurred in iteration=62, 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: 29.5s AutomataMinimizationTime, 70 MinimizatonAttempts, 26954 StatesRemovedByMinimization, 70 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 22.7s InterpolantComputationTime, 2299 NumberOfCodeBlocks, 2293 NumberOfCodeBlocksAsserted, 144 NumberOfCheckSat, 2164 ConstructedInterpolants, 169 QuantifiedInterpolants, 272436 SizeOfPredicates, 299 NumberOfNonLiveVariables, 3148 ConjunctsInSsa, 635 ConjunctsInUnsatCore, 135 InterpolantComputations, 14 PerfectInterpolantSequences, 245/1300 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_19-35-34-904.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/threadpooling_product.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-09-23_19-35-34-904.csv Completed graceful shutdown