java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-bd42740 [2018-09-23 21:29:51,726 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-09-23 21:29:51,728 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-09-23 21:29:51,744 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-09-23 21:29:51,744 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-09-23 21:29:51,745 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-09-23 21:29:51,746 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-09-23 21:29:51,748 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-09-23 21:29:51,750 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-09-23 21:29:51,751 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-09-23 21:29:51,752 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-09-23 21:29:51,752 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-09-23 21:29:51,753 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-09-23 21:29:51,754 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-09-23 21:29:51,755 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-09-23 21:29:51,756 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-09-23 21:29:51,757 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-09-23 21:29:51,759 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-09-23 21:29:51,761 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-09-23 21:29:51,763 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-09-23 21:29:51,764 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-09-23 21:29:51,765 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-09-23 21:29:51,770 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-09-23 21:29:51,787 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf [2018-09-23 21:29:51,811 INFO L110 SettingsManager]: Loading preferences was successful [2018-09-23 21:29:51,812 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-09-23 21:29:51,812 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-09-23 21:29:51,813 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-09-23 21:29:51,813 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-09-23 21:29:51,813 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-09-23 21:29:51,814 INFO L133 SettingsManager]: * Use SBE=true [2018-09-23 21:29:51,814 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-09-23 21:29:51,814 INFO L133 SettingsManager]: * sizeof long=4 [2018-09-23 21:29:51,814 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-09-23 21:29:51,815 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-09-23 21:29:51,815 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-09-23 21:29:51,815 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-09-23 21:29:51,815 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-09-23 21:29:51,815 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-09-23 21:29:51,816 INFO L133 SettingsManager]: * sizeof long double=12 [2018-09-23 21:29:51,816 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-09-23 21:29:51,816 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-09-23 21:29:51,816 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-09-23 21:29:51,816 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-09-23 21:29:51,817 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-09-23 21:29:51,817 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-09-23 21:29:51,817 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:29:51,817 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-09-23 21:29:51,817 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-09-23 21:29:51,818 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-09-23 21:29:51,818 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-09-23 21:29:51,818 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-09-23 21:29:51,818 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-09-23 21:29:51,818 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-09-23 21:29:51,864 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-09-23 21:29:51,879 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-09-23 21:29:51,886 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-09-23 21:29:51,888 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-09-23 21:29:51,888 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-09-23 21:29:51,889 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl [2018-09-23 21:29:51,890 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl' [2018-09-23 21:29:51,956 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-09-23 21:29:51,959 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-09-23 21:29:51,959 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-09-23 21:29:51,959 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-09-23 21:29:51,960 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-09-23 21:29:51,979 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:29:51" (1/1) ... [2018-09-23 21:29:51,992 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:29:51" (1/1) ... [2018-09-23 21:29:51,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-09-23 21:29:52,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-09-23 21:29:52,000 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-09-23 21:29:52,000 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-09-23 21:29:52,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:29:51" (1/1) ... [2018-09-23 21:29:52,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:29:51" (1/1) ... [2018-09-23 21:29:52,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:29:51" (1/1) ... [2018-09-23 21:29:52,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:29:51" (1/1) ... [2018-09-23 21:29:52,016 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:29:51" (1/1) ... [2018-09-23 21:29:52,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:29:51" (1/1) ... [2018-09-23 21:29:52,019 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:29:51" (1/1) ... [2018-09-23 21:29:52,022 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-09-23 21:29:52,022 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-09-23 21:29:52,023 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-09-23 21:29:52,023 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-09-23 21:29:52,024 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:29:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-09-23 21:29:52,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-09-23 21:29:52,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-09-23 21:29:52,385 INFO L354 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-09-23 21:29:52,385 INFO L202 PluginConnector]: Adding new model nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:29:52 BoogieIcfgContainer [2018-09-23 21:29:52,385 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-09-23 21:29:52,386 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-09-23 21:29:52,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-09-23 21:29:52,390 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-09-23 21:29:52,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 23.09 09:29:51" (1/2) ... [2018-09-23 21:29:52,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@261c7eb0 and model type nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.09 09:29:52, skipping insertion in model container [2018-09-23 21:29:52,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.09 09:29:52" (2/2) ... [2018-09-23 21:29:52,395 INFO L112 eAbstractionObserver]: Analyzing ICFG nested.i_4.bpl [2018-09-23 21:29:52,405 INFO L137 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-09-23 21:29:52,413 INFO L149 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-09-23 21:29:52,466 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-09-23 21:29:52,467 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-09-23 21:29:52,467 INFO L382 AbstractCegarLoop]: Hoare is true [2018-09-23 21:29:52,468 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-09-23 21:29:52,468 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-09-23 21:29:52,468 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-09-23 21:29:52,468 INFO L386 AbstractCegarLoop]: Difference is false [2018-09-23 21:29:52,468 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-09-23 21:29:52,469 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-09-23 21:29:52,485 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-09-23 21:29:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-09-23 21:29:52,491 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:52,492 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-09-23 21:29:52,493 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:52,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:52,500 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-09-23 21:29:52,503 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:52,503 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:52,562 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:52,563 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:29:52,563 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:52,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:52,725 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:29:52,725 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-09-23 21:29:52,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-09-23 21:29:52,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-09-23 21:29:52,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:29:52,752 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-09-23 21:29:52,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:52,852 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-09-23 21:29:52,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-09-23 21:29:52,854 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-09-23 21:29:52,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:52,869 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:29:52,870 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 21:29:52,873 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-09-23 21:29:52,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 21:29:52,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-09-23 21:29:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-09-23 21:29:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-09-23 21:29:52,942 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-09-23 21:29:52,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:52,942 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-09-23 21:29:52,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-09-23 21:29:52,942 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-09-23 21:29:52,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-09-23 21:29:52,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:52,943 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-09-23 21:29:52,944 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:52,944 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:52,944 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-09-23 21:29:52,944 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:52,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:52,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:52,946 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:29:52,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:53,029 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:29:53,030 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-09-23 21:29:53,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-09-23 21:29:53,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-09-23 21:29:53,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-09-23 21:29:53,032 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-09-23 21:29:53,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:53,101 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-09-23 21:29:53,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-09-23 21:29:53,102 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-09-23 21:29:53,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:53,102 INFO L225 Difference]: With dead ends: 17 [2018-09-23 21:29:53,103 INFO L226 Difference]: Without dead ends: 11 [2018-09-23 21:29:53,104 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-09-23 21:29:53,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-09-23 21:29:53,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-09-23 21:29:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-09-23 21:29:53,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-09-23 21:29:53,108 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-09-23 21:29:53,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:53,109 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-09-23 21:29:53,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-09-23 21:29:53,109 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-09-23 21:29:53,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-09-23 21:29:53,110 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:53,110 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-09-23 21:29:53,110 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:53,110 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:53,110 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-09-23 21:29:53,111 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:53,111 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:53,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:53,112 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:29:53,112 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:53,212 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:53,213 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:53,225 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:29:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:53,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:53,396 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:53,396 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-09-23 21:29:53,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-09-23 21:29:53,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-09-23 21:29:53,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:29:53,398 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-09-23 21:29:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:53,469 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-09-23 21:29:53,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-09-23 21:29:53,470 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-09-23 21:29:53,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:53,471 INFO L225 Difference]: With dead ends: 21 [2018-09-23 21:29:53,471 INFO L226 Difference]: Without dead ends: 13 [2018-09-23 21:29:53,472 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-09-23 21:29:53,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-09-23 21:29:53,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-09-23 21:29:53,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-09-23 21:29:53,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-09-23 21:29:53,485 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-09-23 21:29:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:53,485 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-09-23 21:29:53,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-09-23 21:29:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-09-23 21:29:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-09-23 21:29:53,489 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:53,489 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-09-23 21:29:53,489 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:53,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:53,491 INFO L82 PathProgramCache]: Analyzing trace with hash -928778543, now seen corresponding path program 2 times [2018-09-23 21:29:53,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:53,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:53,494 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:53,494 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:29:53,495 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-09-23 21:29:53,620 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:53,620 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:53,637 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:29:53,689 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:29:53,689 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:29:53,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-09-23 21:29:53,936 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:53,936 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2018-09-23 21:29:53,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-09-23 21:29:53,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-09-23 21:29:53,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-09-23 21:29:53,938 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-09-23 21:29:54,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:54,410 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2018-09-23 21:29:54,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-09-23 21:29:54,411 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-09-23 21:29:54,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:54,413 INFO L225 Difference]: With dead ends: 43 [2018-09-23 21:29:54,413 INFO L226 Difference]: Without dead ends: 33 [2018-09-23 21:29:54,415 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:29:54,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-09-23 21:29:54,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2018-09-23 21:29:54,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-09-23 21:29:54,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-09-23 21:29:54,424 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2018-09-23 21:29:54,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:54,425 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-09-23 21:29:54,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-09-23 21:29:54,425 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-09-23 21:29:54,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-09-23 21:29:54,426 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:54,426 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 3, 2, 2, 1, 1, 1] [2018-09-23 21:29:54,427 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:54,427 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:54,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1778757007, now seen corresponding path program 3 times [2018-09-23 21:29:54,427 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:54,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:54,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:54,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:29:54,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:54,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:54,699 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-09-23 21:29:54,699 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:54,699 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:54,715 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:29:54,771 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-09-23 21:29:54,771 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:29:54,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-09-23 21:29:54,977 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:54,978 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2018-09-23 21:29:54,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-09-23 21:29:54,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-09-23 21:29:54,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-09-23 21:29:54,979 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-09-23 21:29:55,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:55,594 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2018-09-23 21:29:55,596 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-09-23 21:29:55,596 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-09-23 21:29:55,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:55,597 INFO L225 Difference]: With dead ends: 65 [2018-09-23 21:29:55,597 INFO L226 Difference]: Without dead ends: 51 [2018-09-23 21:29:55,598 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2018-09-23 21:29:55,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-09-23 21:29:55,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-09-23 21:29:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-09-23 21:29:55,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-09-23 21:29:55,612 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 24 [2018-09-23 21:29:55,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:55,613 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-09-23 21:29:55,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-09-23 21:29:55,613 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-09-23 21:29:55,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-09-23 21:29:55,614 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:55,614 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-09-23 21:29:55,615 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:55,615 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:55,615 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-09-23 21:29:55,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:55,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:55,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:55,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:29:55,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 106 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-09-23 21:29:55,784 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:55,784 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:55,802 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:29:55,834 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:29:55,835 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:29:55,838 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:55,934 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 106 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-09-23 21:29:55,954 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:55,955 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-09-23 21:29:55,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-09-23 21:29:55,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-09-23 21:29:55,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:29:55,956 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 13 states. [2018-09-23 21:29:56,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:56,009 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2018-09-23 21:29:56,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:29:56,009 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2018-09-23 21:29:56,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:56,010 INFO L225 Difference]: With dead ends: 75 [2018-09-23 21:29:56,010 INFO L226 Difference]: Without dead ends: 47 [2018-09-23 21:29:56,011 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-09-23 21:29:56,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-09-23 21:29:56,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-09-23 21:29:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-09-23 21:29:56,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-09-23 21:29:56,025 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2018-09-23 21:29:56,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:56,025 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-09-23 21:29:56,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-09-23 21:29:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-09-23 21:29:56,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-09-23 21:29:56,027 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:56,027 INFO L375 BasicCegarLoop]: trace histogram [18, 15, 4, 3, 3, 1, 1, 1] [2018-09-23 21:29:56,027 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:56,028 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:56,028 INFO L82 PathProgramCache]: Analyzing trace with hash -254509681, now seen corresponding path program 5 times [2018-09-23 21:29:56,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:56,031 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:56,032 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:56,033 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:29:56,033 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:56,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 150 proven. 30 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-09-23 21:29:56,293 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:56,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2018-09-23 21:29:56,311 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:56,368 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-09-23 21:29:56,368 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:29:56,371 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 150 proven. 30 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-09-23 21:29:56,598 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:56,598 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-09-23 21:29:56,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-09-23 21:29:56,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-09-23 21:29:56,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:29:56,600 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 15 states. [2018-09-23 21:29:56,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:56,661 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2018-09-23 21:29:56,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:29:56,662 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2018-09-23 21:29:56,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:56,663 INFO L225 Difference]: With dead ends: 85 [2018-09-23 21:29:56,663 INFO L226 Difference]: Without dead ends: 53 [2018-09-23 21:29:56,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-09-23 21:29:56,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-09-23 21:29:56,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-09-23 21:29:56,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-09-23 21:29:56,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2018-09-23 21:29:56,676 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2018-09-23 21:29:56,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:56,676 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2018-09-23 21:29:56,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-09-23 21:29:56,677 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2018-09-23 21:29:56,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-09-23 21:29:56,678 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:56,678 INFO L375 BasicCegarLoop]: trace histogram [21, 18, 4, 3, 3, 1, 1, 1] [2018-09-23 21:29:56,679 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:56,679 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:56,679 INFO L82 PathProgramCache]: Analyzing trace with hash -996261859, now seen corresponding path program 6 times [2018-09-23 21:29:56,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:56,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:56,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:56,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:29:56,681 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 202 proven. 42 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-09-23 21:29:56,832 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:56,832 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:56,839 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:29:56,867 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-09-23 21:29:56,868 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:29:56,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-09-23 21:29:57,031 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:57,031 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2018-09-23 21:29:57,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:29:57,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:29:57,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:29:57,033 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 14 states. [2018-09-23 21:29:57,500 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-09-23 21:29:58,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:58,975 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2018-09-23 21:29:58,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-09-23 21:29:58,976 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2018-09-23 21:29:58,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:58,978 INFO L225 Difference]: With dead ends: 129 [2018-09-23 21:29:58,978 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 21:29:58,981 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=850, Invalid=1906, Unknown=0, NotChecked=0, Total=2756 [2018-09-23 21:29:58,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 21:29:58,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2018-09-23 21:29:58,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-09-23 21:29:59,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2018-09-23 21:29:59,000 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 52 [2018-09-23 21:29:59,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:59,001 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2018-09-23 21:29:59,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:29:59,001 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2018-09-23 21:29:59,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-09-23 21:29:59,003 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:59,004 INFO L375 BasicCegarLoop]: trace histogram [32, 28, 5, 4, 4, 1, 1, 1] [2018-09-23 21:29:59,004 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:59,004 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:59,004 INFO L82 PathProgramCache]: Analyzing trace with hash -252111625, now seen corresponding path program 7 times [2018-09-23 21:29:59,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:59,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:59,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:59,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:29:59,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 392 proven. 56 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2018-09-23 21:29:59,337 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:29:59,337 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:29:59,356 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:29:59,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:29:59,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:29:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 392 proven. 56 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2018-09-23 21:29:59,881 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:29:59,881 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-09-23 21:29:59,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-09-23 21:29:59,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-09-23 21:29:59,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:29:59,883 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 19 states. [2018-09-23 21:29:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:29:59,935 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2018-09-23 21:29:59,940 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:29:59,941 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2018-09-23 21:29:59,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:29:59,942 INFO L225 Difference]: With dead ends: 143 [2018-09-23 21:29:59,942 INFO L226 Difference]: Without dead ends: 85 [2018-09-23 21:29:59,943 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2018-09-23 21:29:59,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-09-23 21:29:59,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-09-23 21:29:59,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-09-23 21:29:59,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2018-09-23 21:29:59,975 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 76 [2018-09-23 21:29:59,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:29:59,976 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2018-09-23 21:29:59,976 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-09-23 21:29:59,976 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2018-09-23 21:29:59,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-09-23 21:29:59,977 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:29:59,978 INFO L375 BasicCegarLoop]: trace histogram [36, 32, 5, 4, 4, 1, 1, 1] [2018-09-23 21:29:59,978 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:29:59,978 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:29:59,978 INFO L82 PathProgramCache]: Analyzing trace with hash 771511391, now seen corresponding path program 8 times [2018-09-23 21:29:59,981 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:29:59,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:29:59,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:29:59,983 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:29:59,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:30:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 494 proven. 72 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-09-23 21:30:00,195 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:30:00,196 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:30:00,206 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:30:00,263 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:30:00,263 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:30:00,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:30:00,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 494 proven. 72 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-09-23 21:30:00,464 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:30:00,464 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-09-23 21:30:00,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-09-23 21:30:00,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-09-23 21:30:00,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:30:00,466 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 21 states. [2018-09-23 21:30:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:30:00,519 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2018-09-23 21:30:00,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-09-23 21:30:00,524 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2018-09-23 21:30:00,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:30:00,525 INFO L225 Difference]: With dead ends: 157 [2018-09-23 21:30:00,525 INFO L226 Difference]: Without dead ends: 93 [2018-09-23 21:30:00,526 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2018-09-23 21:30:00,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-09-23 21:30:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-09-23 21:30:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-09-23 21:30:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2018-09-23 21:30:00,544 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 84 [2018-09-23 21:30:00,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:30:00,544 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2018-09-23 21:30:00,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-09-23 21:30:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2018-09-23 21:30:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-09-23 21:30:00,546 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:30:00,546 INFO L375 BasicCegarLoop]: trace histogram [40, 36, 5, 4, 4, 1, 1, 1] [2018-09-23 21:30:00,546 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:30:00,547 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:30:00,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1630563271, now seen corresponding path program 9 times [2018-09-23 21:30:00,547 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:30:00,547 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:30:00,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:00,548 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:30:00,548 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:30:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 608 proven. 90 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-09-23 21:30:00,730 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:30:00,730 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:30:00,741 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:30:00,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-09-23 21:30:00,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:30:00,825 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:30:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 608 proven. 90 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-09-23 21:30:01,182 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:30:01,182 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-09-23 21:30:01,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-09-23 21:30:01,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-09-23 21:30:01,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:30:01,184 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 23 states. [2018-09-23 21:30:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:30:01,249 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2018-09-23 21:30:01,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:30:01,257 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2018-09-23 21:30:01,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:30:01,257 INFO L225 Difference]: With dead ends: 171 [2018-09-23 21:30:01,258 INFO L226 Difference]: Without dead ends: 101 [2018-09-23 21:30:01,258 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-09-23 21:30:01,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-09-23 21:30:01,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-09-23 21:30:01,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-09-23 21:30:01,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2018-09-23 21:30:01,278 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2018-09-23 21:30:01,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:30:01,278 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2018-09-23 21:30:01,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-09-23 21:30:01,278 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2018-09-23 21:30:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-09-23 21:30:01,280 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:30:01,280 INFO L375 BasicCegarLoop]: trace histogram [44, 40, 5, 4, 4, 1, 1, 1] [2018-09-23 21:30:01,280 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:30:01,280 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:30:01,280 INFO L82 PathProgramCache]: Analyzing trace with hash -220374225, now seen corresponding path program 10 times [2018-09-23 21:30:01,281 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:30:01,281 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:30:01,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:01,282 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:30:01,282 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:30:01,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1472 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-23 21:30:01,421 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:30:01,421 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:30:01,430 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-09-23 21:30:01,492 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-09-23 21:30:01,492 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:30:01,496 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:30:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1472 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-09-23 21:30:01,616 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:30:01,616 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-09-23 21:30:01,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-09-23 21:30:01,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-09-23 21:30:01,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:30:01,617 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 12 states. [2018-09-23 21:30:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:30:01,900 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-09-23 21:30:01,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-09-23 21:30:01,903 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2018-09-23 21:30:01,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:30:01,906 INFO L225 Difference]: With dead ends: 149 [2018-09-23 21:30:01,907 INFO L226 Difference]: Without dead ends: 147 [2018-09-23 21:30:01,907 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-09-23 21:30:01,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-09-23 21:30:01,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 125. [2018-09-23 21:30:01,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-09-23 21:30:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2018-09-23 21:30:01,939 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 100 [2018-09-23 21:30:01,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:30:01,940 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2018-09-23 21:30:01,940 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-09-23 21:30:01,940 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2018-09-23 21:30:01,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-09-23 21:30:01,943 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:30:01,943 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 6, 5, 5, 1, 1, 1] [2018-09-23 21:30:01,946 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:30:01,946 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:30:01,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1446024969, now seen corresponding path program 11 times [2018-09-23 21:30:01,947 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:30:01,947 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:30:01,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:01,948 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:30:01,948 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:01,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:30:02,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-23 21:30:02,385 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:30:02,385 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:30:02,395 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-09-23 21:30:02,475 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-09-23 21:30:02,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:30:02,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:30:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-09-23 21:30:02,657 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:30:02,658 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-09-23 21:30:02,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-09-23 21:30:02,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-09-23 21:30:02,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:30:02,659 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand 14 states. [2018-09-23 21:30:02,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:30:02,826 INFO L93 Difference]: Finished difference Result 173 states and 180 transitions. [2018-09-23 21:30:02,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-09-23 21:30:02,827 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 124 [2018-09-23 21:30:02,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:30:02,828 INFO L225 Difference]: With dead ends: 173 [2018-09-23 21:30:02,828 INFO L226 Difference]: Without dead ends: 171 [2018-09-23 21:30:02,829 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-09-23 21:30:02,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-09-23 21:30:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 149. [2018-09-23 21:30:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-09-23 21:30:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 155 transitions. [2018-09-23 21:30:02,861 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 155 transitions. Word has length 124 [2018-09-23 21:30:02,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:30:02,861 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 155 transitions. [2018-09-23 21:30:02,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-09-23 21:30:02,862 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 155 transitions. [2018-09-23 21:30:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-09-23 21:30:02,864 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:30:02,864 INFO L375 BasicCegarLoop]: trace histogram [66, 60, 7, 6, 6, 1, 1, 1] [2018-09-23 21:30:02,864 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:30:02,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:30:02,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1667523811, now seen corresponding path program 12 times [2018-09-23 21:30:02,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:30:02,865 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:30:02,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:02,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:30:02,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:30:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 3672 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-23 21:30:03,112 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:30:03,112 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:30:03,121 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-09-23 21:30:03,236 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-09-23 21:30:03,236 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:30:03,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:30:03,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 3672 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-09-23 21:30:03,429 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:30:03,429 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-09-23 21:30:03,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-09-23 21:30:03,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-09-23 21:30:03,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:30:03,430 INFO L87 Difference]: Start difference. First operand 149 states and 155 transitions. Second operand 16 states. [2018-09-23 21:30:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:30:03,564 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2018-09-23 21:30:03,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-09-23 21:30:03,565 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 148 [2018-09-23 21:30:03,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:30:03,566 INFO L225 Difference]: With dead ends: 197 [2018-09-23 21:30:03,566 INFO L226 Difference]: Without dead ends: 195 [2018-09-23 21:30:03,567 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-09-23 21:30:03,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-09-23 21:30:03,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2018-09-23 21:30:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-09-23 21:30:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 180 transitions. [2018-09-23 21:30:03,602 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 180 transitions. Word has length 148 [2018-09-23 21:30:03,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:30:03,603 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 180 transitions. [2018-09-23 21:30:03,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-09-23 21:30:03,603 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 180 transitions. [2018-09-23 21:30:03,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-09-23 21:30:03,604 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:30:03,605 INFO L375 BasicCegarLoop]: trace histogram [77, 70, 8, 7, 7, 1, 1, 1] [2018-09-23 21:30:03,605 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:30:03,605 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:30:03,605 INFO L82 PathProgramCache]: Analyzing trace with hash 107136189, now seen corresponding path program 13 times [2018-09-23 21:30:03,605 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:30:03,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:30:03,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:03,606 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:30:03,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:30:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 5138 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-23 21:30:03,855 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:30:03,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:30:03,866 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:30:03,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:30:03,941 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:30:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 5138 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-09-23 21:30:04,156 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:30:04,156 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-09-23 21:30:04,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-09-23 21:30:04,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-09-23 21:30:04,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:30:04,157 INFO L87 Difference]: Start difference. First operand 173 states and 180 transitions. Second operand 18 states. [2018-09-23 21:30:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:30:04,282 INFO L93 Difference]: Finished difference Result 221 states and 230 transitions. [2018-09-23 21:30:04,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-09-23 21:30:04,282 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 172 [2018-09-23 21:30:04,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:30:04,283 INFO L225 Difference]: With dead ends: 221 [2018-09-23 21:30:04,284 INFO L226 Difference]: Without dead ends: 219 [2018-09-23 21:30:04,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-09-23 21:30:04,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-09-23 21:30:04,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 197. [2018-09-23 21:30:04,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-09-23 21:30:04,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 205 transitions. [2018-09-23 21:30:04,317 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 205 transitions. Word has length 172 [2018-09-23 21:30:04,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:30:04,318 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 205 transitions. [2018-09-23 21:30:04,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-09-23 21:30:04,318 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 205 transitions. [2018-09-23 21:30:04,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-09-23 21:30:04,320 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:30:04,320 INFO L375 BasicCegarLoop]: trace histogram [88, 80, 9, 8, 8, 1, 1, 1] [2018-09-23 21:30:04,320 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:30:04,321 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:30:04,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1927956841, now seen corresponding path program 14 times [2018-09-23 21:30:04,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:30:04,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:30:04,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:04,322 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-09-23 21:30:04,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:30:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 0 proven. 6848 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-23 21:30:05,117 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:30:05,117 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:30:05,125 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-09-23 21:30:05,211 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-09-23 21:30:05,211 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:30:05,217 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:30:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 0 proven. 6848 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-09-23 21:30:05,476 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:30:05,476 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-09-23 21:30:05,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-09-23 21:30:05,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-09-23 21:30:05,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:30:05,477 INFO L87 Difference]: Start difference. First operand 197 states and 205 transitions. Second operand 20 states. [2018-09-23 21:30:05,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:30:05,645 INFO L93 Difference]: Finished difference Result 245 states and 255 transitions. [2018-09-23 21:30:05,645 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-09-23 21:30:05,646 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 196 [2018-09-23 21:30:05,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:30:05,647 INFO L225 Difference]: With dead ends: 245 [2018-09-23 21:30:05,647 INFO L226 Difference]: Without dead ends: 243 [2018-09-23 21:30:05,648 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-09-23 21:30:05,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-09-23 21:30:05,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2018-09-23 21:30:05,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-09-23 21:30:05,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 230 transitions. [2018-09-23 21:30:05,686 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 230 transitions. Word has length 196 [2018-09-23 21:30:05,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:30:05,686 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 230 transitions. [2018-09-23 21:30:05,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-09-23 21:30:05,687 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 230 transitions. [2018-09-23 21:30:05,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-09-23 21:30:05,689 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:30:05,689 INFO L375 BasicCegarLoop]: trace histogram [99, 90, 10, 9, 9, 1, 1, 1] [2018-09-23 21:30:05,690 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:30:05,690 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:30:05,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1486407055, now seen corresponding path program 15 times [2018-09-23 21:30:05,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:30:05,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:30:05,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:05,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:30:05,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:05,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:30:06,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9792 backedges. 0 proven. 8802 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-23 21:30:06,088 INFO L301 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-09-23 21:30:06,088 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-09-23 21:30:06,097 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-09-23 21:30:06,242 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2018-09-23 21:30:06,243 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-09-23 21:30:06,248 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-09-23 21:30:06,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9792 backedges. 0 proven. 8802 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-09-23 21:30:06,496 INFO L313 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-09-23 21:30:06,496 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-09-23 21:30:06,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-09-23 21:30:06,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-09-23 21:30:06,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:30:06,497 INFO L87 Difference]: Start difference. First operand 221 states and 230 transitions. Second operand 22 states. [2018-09-23 21:30:06,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:30:06,808 INFO L93 Difference]: Finished difference Result 269 states and 280 transitions. [2018-09-23 21:30:06,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-09-23 21:30:06,809 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 220 [2018-09-23 21:30:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:30:06,811 INFO L225 Difference]: With dead ends: 269 [2018-09-23 21:30:06,811 INFO L226 Difference]: Without dead ends: 267 [2018-09-23 21:30:06,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-09-23 21:30:06,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-09-23 21:30:06,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 245. [2018-09-23 21:30:06,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-09-23 21:30:06,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 255 transitions. [2018-09-23 21:30:06,855 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 255 transitions. Word has length 220 [2018-09-23 21:30:06,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:30:06,855 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 255 transitions. [2018-09-23 21:30:06,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-09-23 21:30:06,856 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 255 transitions. [2018-09-23 21:30:06,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-09-23 21:30:06,857 INFO L367 BasicCegarLoop]: Found error trace [2018-09-23 21:30:06,857 INFO L375 BasicCegarLoop]: trace histogram [110, 100, 11, 10, 10, 1, 1, 1] [2018-09-23 21:30:06,857 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-09-23 21:30:06,858 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-09-23 21:30:06,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1732333643, now seen corresponding path program 16 times [2018-09-23 21:30:06,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-09-23 21:30:06,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-09-23 21:30:06,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:06,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-09-23 21:30:06,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-09-23 21:30:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-09-23 21:30:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 12082 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-09-23 21:30:12,361 INFO L313 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-09-23 21:30:12,361 INFO L328 seRefinementStrategy]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2018-09-23 21:30:12,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-09-23 21:30:12,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-09-23 21:30:12,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 21:30:12,366 INFO L87 Difference]: Start difference. First operand 245 states and 255 transitions. Second operand 103 states. [2018-09-23 21:30:15,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-09-23 21:30:15,251 INFO L93 Difference]: Finished difference Result 10235 states and 10695 transitions. [2018-09-23 21:30:15,252 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-09-23 21:30:15,252 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 244 [2018-09-23 21:30:15,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-09-23 21:30:15,252 INFO L225 Difference]: With dead ends: 10235 [2018-09-23 21:30:15,253 INFO L226 Difference]: Without dead ends: 0 [2018-09-23 21:30:15,268 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-09-23 21:30:15,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-09-23 21:30:15,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-09-23 21:30:15,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-09-23 21:30:15,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-09-23 21:30:15,269 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 244 [2018-09-23 21:30:15,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-09-23 21:30:15,269 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-09-23 21:30:15,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-09-23 21:30:15,269 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-09-23 21:30:15,269 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-09-23 21:30:15,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-09-23 21:30:21,493 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:21,496 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:21,511 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:21,637 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:21,714 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:21,764 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:21,833 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:21,865 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:22,027 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:22,090 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:22,230 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:22,276 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:22,503 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:22,537 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:22,667 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:22,811 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:22,967 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:23,087 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:23,188 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:23,423 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:23,508 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:24,103 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:24,204 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:24,310 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:24,567 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:24,891 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:25,420 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:25,860 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:26,176 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:26,368 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:26,530 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:26,708 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:27,576 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:27,704 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:28,002 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:28,132 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:28,771 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:28,998 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:29,122 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:29,616 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:29,806 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:29,983 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:30,117 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:30,671 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:30,815 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:30,860 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:30,974 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:31,021 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:31,134 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:31,285 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:32,580 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:32,594 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:33,074 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:33,739 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:34,259 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:34,734 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:35,233 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:37,601 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:39,834 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:40,001 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:40,503 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:40,519 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:43,771 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:44,936 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:45,146 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:45,756 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:46,724 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:49,242 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:51,085 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:53,806 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:30:56,361 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:00,464 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:00,639 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:08,600 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:33,298 WARN L178 SmtUtils]: Spent 1.30 m on a formula simplification. DAG size of input: 5105 DAG size of output: 1935 [2018-09-23 21:31:38,228 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:38,228 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:38,233 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:38,301 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:38,346 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:38,371 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:38,590 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:38,607 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:38,690 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:38,725 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:38,840 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:38,879 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:39,040 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:39,067 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:39,191 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:39,248 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:39,374 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:39,487 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:39,585 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:39,819 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:39,906 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:40,595 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:40,701 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:40,811 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:41,079 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:41,375 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:41,814 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:42,303 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:42,776 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:42,964 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:43,135 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:43,331 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:44,150 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:44,291 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:44,605 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:44,737 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:45,407 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:45,634 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:45,757 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:46,250 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:46,576 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:46,711 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:46,743 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:47,286 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:47,425 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:47,469 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:47,578 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:47,622 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:47,733 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:47,878 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:49,120 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:49,133 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:49,525 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:50,408 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:50,935 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:51,426 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:51,964 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:54,180 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:56,710 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:56,914 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:57,539 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:31:57,556 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:32:01,043 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:32:02,326 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:32:02,704 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:32:03,327 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:32:04,333 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:32:06,836 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:32:08,584 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:32:11,157 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:32:13,624 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:32:17,440 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:32:17,607 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:32:25,036 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-09-23 21:32:48,222 WARN L178 SmtUtils]: Spent 1.25 m on a formula simplification. DAG size of input: 5105 DAG size of output: 1935 [2018-09-23 21:32:49,057 WARN L178 SmtUtils]: Spent 830.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-09-23 21:32:49,896 WARN L178 SmtUtils]: Spent 837.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-09-23 21:34:05,031 WARN L178 SmtUtils]: Spent 1.25 m on a formula simplification. DAG size of input: 1932 DAG size of output: 362 Received shutdown request... [2018-09-23 21:34:09,436 WARN L186 SmtUtils]: Removed 2 from assertion stack [2018-09-23 21:34:09,436 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-09-23 21:34:09,437 INFO L168 Benchmark]: Toolchain (without parser) took 257481.21 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.5 GB in the beginning and 2.1 GB in the end (delta: -608.9 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-09-23 21:34:09,439 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.93 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:34:09,439 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.43 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:34:09,440 INFO L168 Benchmark]: Boogie Preprocessor took 21.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-09-23 21:34:09,440 INFO L168 Benchmark]: RCFGBuilder took 363.32 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-09-23 21:34:09,441 INFO L168 Benchmark]: TraceAbstraction took 257050.21 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -630.0 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-09-23 21:34:09,445 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.93 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.43 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.85 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 363.32 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 257050.21 ms. Allocated memory was 1.5 GB in the beginning and 3.5 GB in the end (delta: 1.9 GB). Free memory was 1.4 GB in the beginning and 2.1 GB in the end (delta: -630.0 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: assertion always holds For all program executions holds that assertion always holds at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 1932. RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-09-23_21-34-09-460.csv Completed graceful shutdown