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_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f-m [2018-10-04 14:30:07,707 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 14:30:07,709 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 14:30:07,721 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 14:30:07,721 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 14:30:07,722 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 14:30:07,724 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 14:30:07,725 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 14:30:07,727 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 14:30:07,728 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 14:30:07,729 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 14:30:07,729 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 14:30:07,730 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 14:30:07,731 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 14:30:07,732 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 14:30:07,733 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 14:30:07,734 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 14:30:07,736 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 14:30:07,738 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 14:30:07,739 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 14:30:07,741 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 14:30:07,742 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 14:30:07,744 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-04 14:30:07,745 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-04 14:30:07,745 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-04 14:30:07,746 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-04 14:30:07,747 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-04 14:30:07,748 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-04 14:30:07,749 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-04 14:30:07,750 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-04 14:30:07,750 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-04 14:30:07,751 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-04 14:30:07,751 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-04 14:30:07,751 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-04 14:30:07,752 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-04 14:30:07,753 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-04 14:30:07,753 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 14:30:07,782 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 14:30:07,783 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 14:30:07,784 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 14:30:07,784 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 14:30:07,785 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 14:30:07,785 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 14:30:07,786 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 14:30:07,786 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 14:30:07,786 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 14:30:07,786 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 14:30:07,786 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 14:30:07,787 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 14:30:07,787 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 14:30:07,787 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 14:30:07,787 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 14:30:07,787 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 14:30:07,789 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 14:30:07,789 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 14:30:07,789 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 14:30:07,789 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 14:30:07,790 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 14:30:07,790 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 14:30:07,790 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:30:07,790 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 14:30:07,791 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 14:30:07,791 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 14:30:07,791 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 14:30:07,791 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 14:30:07,791 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 14:30:07,792 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 14:30:07,792 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 14:30:07,859 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 14:30:07,873 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 14:30:07,879 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 14:30:07,881 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 14:30:07,881 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 14:30:07,882 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl [2018-10-04 14:30:07,882 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested1.i_4.bpl' [2018-10-04 14:30:07,952 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 14:30:07,954 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 14:30:07,955 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 14:30:07,955 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 14:30:07,955 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 14:30:07,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:30:07" (1/1) ... [2018-10-04 14:30:07,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:30:07" (1/1) ... [2018-10-04 14:30:07,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 14:30:07,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 14:30:07,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 14:30:07,999 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 14:30:08,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:30:07" (1/1) ... [2018-10-04 14:30:08,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:30:07" (1/1) ... [2018-10-04 14:30:08,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:30:07" (1/1) ... [2018-10-04 14:30:08,012 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:30:07" (1/1) ... [2018-10-04 14:30:08,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:30:07" (1/1) ... [2018-10-04 14:30:08,019 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:30:07" (1/1) ... [2018-10-04 14:30:08,020 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:30:07" (1/1) ... [2018-10-04 14:30:08,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 14:30:08,023 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 14:30:08,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 14:30:08,024 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 14:30:08,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:30:07" (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 [2018-10-04 14:30:08,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 14:30:08,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 14:30:08,339 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 14:30:08,339 INFO L202 PluginConnector]: Adding new model nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:30:08 BoogieIcfgContainer [2018-10-04 14:30:08,340 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 14:30:08,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 14:30:08,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 14:30:08,344 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 14:30:08,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:30:07" (1/2) ... [2018-10-04 14:30:08,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214ac336 and model type nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 02:30:08, skipping insertion in model container [2018-10-04 14:30:08,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested1.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:30:08" (2/2) ... [2018-10-04 14:30:08,347 INFO L112 eAbstractionObserver]: Analyzing ICFG nested1.i_4.bpl [2018-10-04 14:30:08,357 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 14:30:08,368 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 14:30:08,418 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 14:30:08,419 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 14:30:08,419 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 14:30:08,419 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 14:30:08,420 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 14:30:08,420 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 14:30:08,420 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 14:30:08,420 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 14:30:08,420 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 14:30:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 14:30:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 14:30:08,440 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:08,441 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 14:30:08,442 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:08,448 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:08,449 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 14:30:08,451 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:08,452 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:08,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:08,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:08,498 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:08,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:08,614 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:30:08,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 14:30:08,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 14:30:08,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 14:30:08,632 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:08,634 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 14:30:08,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:08,716 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-04 14:30:08,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 14:30:08,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 14:30:08,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:08,751 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:30:08,751 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 14:30:08,761 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 14:30:08,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 14:30:08,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-10-04 14:30:08,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 14:30:08,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 14:30:08,806 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-10-04 14:30:08,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:08,806 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 14:30:08,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 14:30:08,807 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 14:30:08,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 14:30:08,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:08,807 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 14:30:08,808 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:08,808 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:08,808 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-10-04 14:30:08,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:08,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:08,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:08,810 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:08,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:08,865 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:30:08,865 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 14:30:08,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 14:30:08,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 14:30:08,868 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:08,868 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2018-10-04 14:30:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:08,896 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-10-04 14:30:08,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 14:30:08,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2018-10-04 14:30:08,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:08,897 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:30:08,898 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 14:30:08,898 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 1 [2018-10-04 14:30:08,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 14:30:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 14:30:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 14:30:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 14:30:08,903 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-04 14:30:08,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:08,904 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 14:30:08,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 14:30:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 14:30:08,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 14:30:08,905 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:08,905 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 14:30:08,905 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:08,905 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:08,906 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-10-04 14:30:08,906 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:08,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:08,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:08,907 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:08,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:08,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:09,014 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:09,014 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 [2018-10-04 14:30:09,024 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:09,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:09,052 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:09,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 14:30:09,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:09,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2018-10-04 14:30:09,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 14:30:09,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 14:30:09,206 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:09,206 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-10-04 14:30:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:09,591 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2018-10-04 14:30:09,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:30:09,592 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-10-04 14:30:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:09,594 INFO L225 Difference]: With dead ends: 35 [2018-10-04 14:30:09,594 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 14:30:09,594 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 6 [2018-10-04 14:30:09,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 14:30:09,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2018-10-04 14:30:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 14:30:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2018-10-04 14:30:09,611 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2018-10-04 14:30:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:09,612 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2018-10-04 14:30:09,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 14:30:09,612 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2018-10-04 14:30:09,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 14:30:09,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:09,613 INFO L375 BasicCegarLoop]: trace histogram [6, 4, 3, 2, 2, 1, 1, 1] [2018-10-04 14:30:09,613 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:09,614 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:09,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1881088987, now seen corresponding path program 2 times [2018-10-04 14:30:09,616 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:09,616 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:09,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:09,618 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:09,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2018-10-04 14:30:09,738 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:09,739 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 [2018-10-04 14:30:09,752 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:30:09,787 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:30:09,788 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:09,790 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:09,925 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2018-10-04 14:30:09,953 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:09,953 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2018-10-04 14:30:09,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:30:09,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:30:09,954 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:09,955 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 8 states. [2018-10-04 14:30:10,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:10,530 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2018-10-04 14:30:10,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:30:10,531 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2018-10-04 14:30:10,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:10,532 INFO L225 Difference]: With dead ends: 55 [2018-10-04 14:30:10,532 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 14:30:10,533 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 11 [2018-10-04 14:30:10,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 14:30:10,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2018-10-04 14:30:10,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 14:30:10,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2018-10-04 14:30:10,544 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 20 [2018-10-04 14:30:10,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:10,544 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2018-10-04 14:30:10,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:30:10,545 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2018-10-04 14:30:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 14:30:10,546 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:10,546 INFO L375 BasicCegarLoop]: trace histogram [12, 9, 4, 3, 3, 1, 1, 1] [2018-10-04 14:30:10,547 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:10,547 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:10,547 INFO L82 PathProgramCache]: Analyzing trace with hash 501354739, now seen corresponding path program 3 times [2018-10-04 14:30:10,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:10,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:10,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:10,549 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:10,549 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-04 14:30:10,927 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:10,927 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 [2018-10-04 14:30:10,939 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:30:10,966 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2018-10-04 14:30:10,966 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:10,969 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 70 proven. 12 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2018-10-04 14:30:11,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:11,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2018-10-04 14:30:11,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 14:30:11,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 14:30:11,053 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:11,053 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 6 states. [2018-10-04 14:30:11,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:11,117 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2018-10-04 14:30:11,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:30:11,120 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2018-10-04 14:30:11,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:11,121 INFO L225 Difference]: With dead ends: 65 [2018-10-04 14:30:11,121 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 14:30:11,124 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.1s impTime 4 [2018-10-04 14:30:11,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 14:30:11,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 14:30:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 14:30:11,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-10-04 14:30:11,137 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2018-10-04 14:30:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:11,139 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-10-04 14:30:11,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 14:30:11,139 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-10-04 14:30:11,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 14:30:11,140 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:11,141 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-10-04 14:30:11,141 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:11,142 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:11,142 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-10-04 14:30:11,142 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:11,142 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:11,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:11,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:11,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:11,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2018-10-04 14:30:11,382 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:11,382 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 [2018-10-04 14:30:11,398 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:30:11,436 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:30:11,437 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:11,440 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2018-10-04 14:30:11,643 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:11,643 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 9 [2018-10-04 14:30:11,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:30:11,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:30:11,645 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:11,645 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 10 states. [2018-10-04 14:30:11,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:11,868 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2018-10-04 14:30:11,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:30:11,869 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2018-10-04 14:30:11,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:11,871 INFO L225 Difference]: With dead ends: 65 [2018-10-04 14:30:11,871 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 14:30:11,871 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.0s impTime 8 [2018-10-04 14:30:11,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 14:30:11,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 53. [2018-10-04 14:30:11,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 14:30:11,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2018-10-04 14:30:11,886 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 40 [2018-10-04 14:30:11,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:11,886 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2018-10-04 14:30:11,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:30:11,887 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2018-10-04 14:30:11,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 14:30:11,888 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:11,888 INFO L375 BasicCegarLoop]: trace histogram [20, 16, 5, 4, 4, 1, 1, 1] [2018-10-04 14:30:11,889 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:11,889 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:11,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1874565441, now seen corresponding path program 5 times [2018-10-04 14:30:11,889 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:11,889 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:11,890 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:11,890 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:11,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:12,049 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2018-10-04 14:30:12,050 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:12,050 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 [2018-10-04 14:30:12,060 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:30:12,079 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 14:30:12,079 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:12,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 262 proven. 20 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2018-10-04 14:30:12,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:12,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2018-10-04 14:30:12,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:30:12,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:30:12,259 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:12,259 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 12 states. [2018-10-04 14:30:13,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:13,686 INFO L93 Difference]: Finished difference Result 127 states and 143 transitions. [2018-10-04 14:30:13,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 14:30:13,687 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 52 [2018-10-04 14:30:13,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:13,688 INFO L225 Difference]: With dead ends: 127 [2018-10-04 14:30:13,688 INFO L226 Difference]: Without dead ends: 87 [2018-10-04 14:30:13,689 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 29 [2018-10-04 14:30:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2018-10-04 14:30:13,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2018-10-04 14:30:13,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2018-10-04 14:30:13,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 80 transitions. [2018-10-04 14:30:13,710 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 80 transitions. Word has length 52 [2018-10-04 14:30:13,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:13,710 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 80 transitions. [2018-10-04 14:30:13,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:30:13,710 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 80 transitions. [2018-10-04 14:30:13,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2018-10-04 14:30:13,713 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:13,713 INFO L375 BasicCegarLoop]: trace histogram [30, 25, 6, 5, 5, 1, 1, 1] [2018-10-04 14:30:13,713 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:13,713 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:13,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1734028097, now seen corresponding path program 6 times [2018-10-04 14:30:13,714 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:13,714 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:13,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:13,715 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:13,715 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 750 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2018-10-04 14:30:14,221 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:14,222 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 [2018-10-04 14:30:14,232 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:30:14,325 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2018-10-04 14:30:14,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:14,330 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:14,450 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 520 proven. 30 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2018-10-04 14:30:14,471 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:14,472 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-10-04 14:30:14,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:30:14,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:30:14,473 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:14,473 INFO L87 Difference]: Start difference. First operand 75 states and 80 transitions. Second operand 14 states. [2018-10-04 14:30:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:16,762 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2018-10-04 14:30:16,762 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 14:30:16,763 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 74 [2018-10-04 14:30:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:16,763 INFO L225 Difference]: With dead ends: 175 [2018-10-04 14:30:16,764 INFO L226 Difference]: Without dead ends: 115 [2018-10-04 14:30:16,767 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.4s impTime 41 [2018-10-04 14:30:16,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2018-10-04 14:30:16,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 101. [2018-10-04 14:30:16,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 14:30:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2018-10-04 14:30:16,787 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 74 [2018-10-04 14:30:16,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:16,788 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2018-10-04 14:30:16,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:30:16,788 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2018-10-04 14:30:16,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 14:30:16,790 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:16,790 INFO L375 BasicCegarLoop]: trace histogram [42, 36, 7, 6, 6, 1, 1, 1] [2018-10-04 14:30:16,790 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:16,790 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:16,791 INFO L82 PathProgramCache]: Analyzing trace with hash 883432563, now seen corresponding path program 7 times [2018-10-04 14:30:16,791 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:16,791 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:16,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:16,792 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:16,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:17,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1512 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2018-10-04 14:30:17,049 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:17,049 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 [2018-10-04 14:30:17,058 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:17,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:17,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:17,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1554 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2018-10-04 14:30:17,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:17,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 14] total 14 [2018-10-04 14:30:17,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 14:30:17,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 14:30:17,781 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:17,782 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 15 states. [2018-10-04 14:30:18,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:18,219 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2018-10-04 14:30:18,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:30:18,219 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 100 [2018-10-04 14:30:18,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:18,221 INFO L225 Difference]: With dead ends: 133 [2018-10-04 14:30:18,221 INFO L226 Difference]: Without dead ends: 131 [2018-10-04 14:30:18,223 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.2s impTime 12 [2018-10-04 14:30:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2018-10-04 14:30:18,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 117. [2018-10-04 14:30:18,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2018-10-04 14:30:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2018-10-04 14:30:18,254 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 100 [2018-10-04 14:30:18,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:18,256 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2018-10-04 14:30:18,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 14:30:18,256 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2018-10-04 14:30:18,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2018-10-04 14:30:18,259 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:18,261 INFO L375 BasicCegarLoop]: trace histogram [49, 42, 8, 7, 7, 1, 1, 1] [2018-10-04 14:30:18,261 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:18,261 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:18,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1346298395, now seen corresponding path program 8 times [2018-10-04 14:30:18,263 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:18,263 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:18,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:18,264 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:18,264 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-10-04 14:30:18,588 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:18,588 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 [2018-10-04 14:30:18,601 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:30:18,646 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:30:18,646 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:18,653 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2408 backedges. 0 proven. 2114 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2018-10-04 14:30:18,954 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:18,955 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2018-10-04 14:30:18,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:30:18,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:30:18,955 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:18,956 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand 10 states. [2018-10-04 14:30:19,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:19,193 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2018-10-04 14:30:19,194 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:30:19,194 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 116 [2018-10-04 14:30:19,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:19,196 INFO L225 Difference]: With dead ends: 149 [2018-10-04 14:30:19,196 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 14:30:19,196 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.1s impTime 8 [2018-10-04 14:30:19,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 14:30:19,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 133. [2018-10-04 14:30:19,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 14:30:19,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 141 transitions. [2018-10-04 14:30:19,221 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 141 transitions. Word has length 116 [2018-10-04 14:30:19,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:19,221 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 141 transitions. [2018-10-04 14:30:19,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:30:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 141 transitions. [2018-10-04 14:30:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 14:30:19,223 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:19,223 INFO L375 BasicCegarLoop]: trace histogram [56, 48, 9, 8, 8, 1, 1, 1] [2018-10-04 14:30:19,224 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:19,224 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:19,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1851587415, now seen corresponding path program 9 times [2018-10-04 14:30:19,224 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:19,224 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:19,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:19,225 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:19,225 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 0 proven. 2816 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2018-10-04 14:30:19,546 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:19,546 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 [2018-10-04 14:30:19,560 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:30:19,665 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2018-10-04 14:30:19,666 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:19,670 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3152 backedges. 702 proven. 42 refuted. 0 times theorem prover too weak. 2408 trivial. 0 not checked. [2018-10-04 14:30:19,855 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:19,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2018-10-04 14:30:19,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:30:19,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:30:19,856 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:19,856 INFO L87 Difference]: Start difference. First operand 133 states and 141 transitions. Second operand 18 states. [2018-10-04 14:30:23,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:23,433 INFO L93 Difference]: Finished difference Result 299 states and 327 transitions. [2018-10-04 14:30:23,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2018-10-04 14:30:23,434 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 132 [2018-10-04 14:30:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:23,435 INFO L225 Difference]: With dead ends: 299 [2018-10-04 14:30:23,435 INFO L226 Difference]: Without dead ends: 183 [2018-10-04 14:30:23,436 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.8s impTime 71 [2018-10-04 14:30:23,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2018-10-04 14:30:23,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 167. [2018-10-04 14:30:23,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2018-10-04 14:30:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 176 transitions. [2018-10-04 14:30:23,460 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 176 transitions. Word has length 132 [2018-10-04 14:30:23,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:23,461 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 176 transitions. [2018-10-04 14:30:23,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:30:23,461 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 176 transitions. [2018-10-04 14:30:23,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2018-10-04 14:30:23,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:23,463 INFO L375 BasicCegarLoop]: trace histogram [72, 63, 10, 9, 9, 1, 1, 1] [2018-10-04 14:30:23,464 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:23,464 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:23,464 INFO L82 PathProgramCache]: Analyzing trace with hash -132347917, now seen corresponding path program 10 times [2018-10-04 14:30:23,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:23,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:23,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:23,465 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:23,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 0 proven. 4698 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2018-10-04 14:30:23,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:23,785 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 [2018-10-04 14:30:23,793 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:30:23,853 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:30:23,853 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:23,857 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5202 backedges. 1952 proven. 56 refuted. 0 times theorem prover too weak. 3194 trivial. 0 not checked. [2018-10-04 14:30:24,118 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:24,118 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2018-10-04 14:30:24,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:30:24,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:30:24,119 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:24,120 INFO L87 Difference]: Start difference. First operand 167 states and 176 transitions. Second operand 20 states. [2018-10-04 14:30:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:27,286 INFO L93 Difference]: Finished difference Result 371 states and 402 transitions. [2018-10-04 14:30:27,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2018-10-04 14:30:27,288 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 166 [2018-10-04 14:30:27,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:27,289 INFO L225 Difference]: With dead ends: 371 [2018-10-04 14:30:27,289 INFO L226 Difference]: Without dead ends: 223 [2018-10-04 14:30:27,290 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 1.9s impTime 89 [2018-10-04 14:30:27,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2018-10-04 14:30:27,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 205. [2018-10-04 14:30:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2018-10-04 14:30:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 215 transitions. [2018-10-04 14:30:27,318 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 215 transitions. Word has length 166 [2018-10-04 14:30:27,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:27,318 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 215 transitions. [2018-10-04 14:30:27,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:30:27,318 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 215 transitions. [2018-10-04 14:30:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2018-10-04 14:30:27,321 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:27,321 INFO L375 BasicCegarLoop]: trace histogram [90, 80, 11, 10, 10, 1, 1, 1] [2018-10-04 14:30:27,321 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:27,321 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:27,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1568317117, now seen corresponding path program 11 times [2018-10-04 14:30:27,322 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:27,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:27,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:27,323 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:27,323 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 0 proven. 7400 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2018-10-04 14:30:27,711 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:27,711 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 [2018-10-04 14:30:27,719 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:30:27,926 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2018-10-04 14:30:27,926 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:27,929 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:28,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8120 backedges. 3774 proven. 72 refuted. 0 times theorem prover too weak. 4274 trivial. 0 not checked. [2018-10-04 14:30:28,212 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:28,212 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2018-10-04 14:30:28,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:30:28,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:30:28,213 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:28,213 INFO L87 Difference]: Start difference. First operand 205 states and 215 transitions. Second operand 22 states. [2018-10-04 14:30:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:31,615 INFO L93 Difference]: Finished difference Result 451 states and 485 transitions. [2018-10-04 14:30:31,615 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-04 14:30:31,615 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 204 [2018-10-04 14:30:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:31,617 INFO L225 Difference]: With dead ends: 451 [2018-10-04 14:30:31,617 INFO L226 Difference]: Without dead ends: 267 [2018-10-04 14:30:31,618 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.6s impTime 109 [2018-10-04 14:30:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-04 14:30:31,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 247. [2018-10-04 14:30:31,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2018-10-04 14:30:31,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 258 transitions. [2018-10-04 14:30:31,653 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 258 transitions. Word has length 204 [2018-10-04 14:30:31,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:31,653 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 258 transitions. [2018-10-04 14:30:31,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:30:31,653 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 258 transitions. [2018-10-04 14:30:31,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2018-10-04 14:30:31,657 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:31,657 INFO L375 BasicCegarLoop]: trace histogram [110, 99, 12, 11, 11, 1, 1, 1] [2018-10-04 14:30:31,657 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:31,657 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:31,658 INFO L82 PathProgramCache]: Analyzing trace with hash 915329223, now seen corresponding path program 12 times [2018-10-04 14:30:31,658 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:31,658 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:31,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:31,659 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:31,659 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 0 proven. 11132 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-04 14:30:32,766 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:32,766 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 [2018-10-04 14:30:32,774 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:30:37,620 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2018-10-04 14:30:37,620 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:37,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12122 backedges. 2022 proven. 90 refuted. 0 times theorem prover too weak. 10010 trivial. 0 not checked. [2018-10-04 14:30:37,948 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:37,949 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2018-10-04 14:30:37,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 14:30:37,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 14:30:37,950 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:37,950 INFO L87 Difference]: Start difference. First operand 247 states and 258 transitions. Second operand 24 states. [2018-10-04 14:30:44,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:44,422 INFO L93 Difference]: Finished difference Result 539 states and 576 transitions. [2018-10-04 14:30:44,422 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2018-10-04 14:30:44,423 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 246 [2018-10-04 14:30:44,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:44,425 INFO L225 Difference]: With dead ends: 539 [2018-10-04 14:30:44,425 INFO L226 Difference]: Without dead ends: 315 [2018-10-04 14:30:44,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s Time 4.0s impTime 131 [2018-10-04 14:30:44,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2018-10-04 14:30:44,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 293. [2018-10-04 14:30:44,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2018-10-04 14:30:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 305 transitions. [2018-10-04 14:30:44,462 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 305 transitions. Word has length 246 [2018-10-04 14:30:44,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:44,463 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 305 transitions. [2018-10-04 14:30:44,463 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 14:30:44,463 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 305 transitions. [2018-10-04 14:30:44,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2018-10-04 14:30:44,464 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:44,465 INFO L375 BasicCegarLoop]: trace histogram [132, 120, 13, 12, 12, 1, 1, 1] [2018-10-04 14:30:44,465 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:44,465 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:44,465 INFO L82 PathProgramCache]: Analyzing trace with hash 154612223, now seen corresponding path program 13 times [2018-10-04 14:30:44,465 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:44,466 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:44,466 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:44,466 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:44,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-04 14:30:44,931 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:44,931 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 [2018-10-04 14:30:44,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:45,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:45,043 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:45,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17448 backedges. 0 proven. 16128 refuted. 0 times theorem prover too weak. 1320 trivial. 0 not checked. [2018-10-04 14:30:45,685 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:45,685 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2018-10-04 14:30:45,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 14:30:45,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 14:30:45,686 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:45,686 INFO L87 Difference]: Start difference. First operand 293 states and 305 transitions. Second operand 15 states. [2018-10-04 14:30:46,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:46,034 INFO L93 Difference]: Finished difference Result 341 states and 355 transitions. [2018-10-04 14:30:46,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:30:46,035 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 292 [2018-10-04 14:30:46,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:46,037 INFO L225 Difference]: With dead ends: 341 [2018-10-04 14:30:46,037 INFO L226 Difference]: Without dead ends: 339 [2018-10-04 14:30:46,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.1s impTime 13 [2018-10-04 14:30:46,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2018-10-04 14:30:46,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 317. [2018-10-04 14:30:46,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2018-10-04 14:30:46,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 330 transitions. [2018-10-04 14:30:46,088 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 330 transitions. Word has length 292 [2018-10-04 14:30:46,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:46,089 INFO L480 AbstractCegarLoop]: Abstraction has 317 states and 330 transitions. [2018-10-04 14:30:46,089 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 14:30:46,089 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 330 transitions. [2018-10-04 14:30:46,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2018-10-04 14:30:46,091 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:46,091 INFO L375 BasicCegarLoop]: trace histogram [143, 130, 14, 13, 13, 1, 1, 1] [2018-10-04 14:30:46,092 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:46,092 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:46,092 INFO L82 PathProgramCache]: Analyzing trace with hash -114885159, now seen corresponding path program 14 times [2018-10-04 14:30:46,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:46,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:46,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:46,093 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:30:46,093 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-04 14:30:46,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:46,905 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 [2018-10-04 14:30:46,920 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:30:47,032 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:30:47,033 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:30:47,042 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:30:47,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20488 backedges. 0 proven. 19058 refuted. 0 times theorem prover too weak. 1430 trivial. 0 not checked. [2018-10-04 14:30:47,796 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 14:30:47,796 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2018-10-04 14:30:47,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:30:47,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:30:47,797 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:30:47,797 INFO L87 Difference]: Start difference. First operand 317 states and 330 transitions. Second operand 16 states. [2018-10-04 14:30:48,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:30:48,137 INFO L93 Difference]: Finished difference Result 365 states and 380 transitions. [2018-10-04 14:30:48,137 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 14:30:48,138 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 316 [2018-10-04 14:30:48,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:30:48,140 INFO L225 Difference]: With dead ends: 365 [2018-10-04 14:30:48,140 INFO L226 Difference]: Without dead ends: 363 [2018-10-04 14:30:48,140 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 315 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.3s impTime 14 [2018-10-04 14:30:48,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2018-10-04 14:30:48,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341. [2018-10-04 14:30:48,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2018-10-04 14:30:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 355 transitions. [2018-10-04 14:30:48,190 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 355 transitions. Word has length 316 [2018-10-04 14:30:48,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:30:48,190 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 355 transitions. [2018-10-04 14:30:48,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:30:48,191 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 355 transitions. [2018-10-04 14:30:48,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2018-10-04 14:30:48,193 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:30:48,193 INFO L375 BasicCegarLoop]: trace histogram [154, 140, 15, 14, 14, 1, 1, 1] [2018-10-04 14:30:48,193 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 14:30:48,193 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:30:48,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1438164045, now seen corresponding path program 15 times [2018-10-04 14:30:48,194 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:30:48,194 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:30:48,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:48,194 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:30:48,195 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:30:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:30:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 23772 backedges. 0 proven. 22232 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2018-10-04 14:30:48,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 14:30:48,716 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 [2018-10-04 14:30:48,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown