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-c372c2b [2018-10-02 11:47:20,593 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-02 11:47:20,594 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-02 11:47:20,610 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-02 11:47:20,611 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-02 11:47:20,612 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-02 11:47:20,613 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-02 11:47:20,615 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-02 11:47:20,617 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-02 11:47:20,618 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-02 11:47:20,619 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-02 11:47:20,644 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 [2018-10-02 11:47:20,667 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-02 11:47:20,667 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-02 11:47:20,668 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-02 11:47:20,668 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-02 11:47:20,669 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-02 11:47:20,669 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-02 11:47:20,669 INFO L133 SettingsManager]: * Use SBE=true [2018-10-02 11:47:20,670 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-02 11:47:20,670 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-02 11:47:20,670 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-02 11:47:20,670 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-02 11:47:20,670 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-02 11:47:20,671 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-02 11:47:20,671 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-02 11:47:20,671 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-02 11:47:20,671 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-02 11:47:20,671 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-02 11:47:20,672 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-02 11:47:20,672 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-02 11:47:20,672 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-02 11:47:20,672 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-02 11:47:20,673 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-02 11:47:20,673 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:47:20,673 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-02 11:47:20,673 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-02 11:47:20,673 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-02 11:47:20,674 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-02 11:47:20,674 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-02 11:47:20,674 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-02 11:47:20,674 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-02 11:47:20,717 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-02 11:47:20,732 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-02 11:47:20,739 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-02 11:47:20,741 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-02 11:47:20,742 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-02 11:47:20,744 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl [2018-10-02 11:47:20,745 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl' [2018-10-02 11:47:20,812 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-02 11:47:20,816 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-02 11:47:20,817 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-02 11:47:20,817 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-02 11:47:20,817 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-02 11:47:20,838 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 02.10 11:47:20" (1/1) ... [2018-10-02 11:47:20,851 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 02.10 11:47:20" (1/1) ... [2018-10-02 11:47:20,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-02 11:47:20,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-02 11:47:20,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-02 11:47:20,860 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-02 11:47:20,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:47:20" (1/1) ... [2018-10-02 11:47:20,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:47:20" (1/1) ... [2018-10-02 11:47:20,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:47:20" (1/1) ... [2018-10-02 11:47:20,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:47:20" (1/1) ... [2018-10-02 11:47:20,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:47:20" (1/1) ... [2018-10-02 11:47:20,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:47:20" (1/1) ... [2018-10-02 11:47:20,879 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:47:20" (1/1) ... [2018-10-02 11:47:20,881 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-02 11:47:20,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-02 11:47:20,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-02 11:47:20,882 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-02 11:47:20,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:47:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-02 11:47:20,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-02 11:47:20,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-02 11:47:21,262 INFO L340 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-02 11:47:21,262 INFO L202 PluginConnector]: Adding new model nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:47:21 BoogieIcfgContainer [2018-10-02 11:47:21,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-02 11:47:21,263 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-02 11:47:21,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-02 11:47:21,266 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-02 11:47:21,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 02.10 11:47:20" (1/2) ... [2018-10-02 11:47:21,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20febc77 and model type nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 11:47:21, skipping insertion in model container [2018-10-02 11:47:21,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 11:47:21" (2/2) ... [2018-10-02 11:47:21,270 INFO L112 eAbstractionObserver]: Analyzing ICFG nested.i_4.bpl [2018-10-02 11:47:21,279 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-02 11:47:21,287 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-02 11:47:21,340 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-02 11:47:21,340 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-02 11:47:21,341 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-02 11:47:21,341 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-02 11:47:21,341 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-02 11:47:21,341 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-02 11:47:21,341 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-02 11:47:21,342 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-02 11:47:21,342 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-02 11:47:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-02 11:47:21,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-02 11:47:21,362 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:21,371 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-02 11:47:21,372 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:21,377 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:21,378 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-02 11:47:21,380 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:21,381 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:21,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:21,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:47:21,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:21,527 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:47:21,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-02 11:47:21,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-02 11:47:21,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-02 11:47:21,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-02 11:47:21,545 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-02 11:47:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:21,621 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-02 11:47:21,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-02 11:47:21,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-02 11:47:21,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:21,632 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:47:21,633 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 11:47:21,636 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 [2018-10-02 11:47:21,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 11:47:21,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-10-02 11:47:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-02 11:47:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-02 11:47:21,672 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-10-02 11:47:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:21,673 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-02 11:47:21,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-02 11:47:21,673 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-02 11:47:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-02 11:47:21,674 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:21,674 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-02 11:47:21,674 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:21,674 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:21,675 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-10-02 11:47:21,675 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:21,675 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:21,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:21,676 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:47:21,676 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:21,812 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:47:21,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-02 11:47:21,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-02 11:47:21,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-02 11:47:21,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-02 11:47:21,816 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-10-02 11:47:21,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:21,907 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-10-02 11:47:21,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-02 11:47:21,908 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-02 11:47:21,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:21,909 INFO L225 Difference]: With dead ends: 17 [2018-10-02 11:47:21,909 INFO L226 Difference]: Without dead ends: 11 [2018-10-02 11:47:21,910 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-02 11:47:21,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-02 11:47:21,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-02 11:47:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-02 11:47:21,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-02 11:47:21,915 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-02 11:47:21,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:21,915 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-02 11:47:21,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-02 11:47:21,915 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-02 11:47:21,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-02 11:47:21,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:21,916 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-02 11:47:21,916 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:21,917 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:21,917 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-10-02 11:47:21,917 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:21,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:21,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:21,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:47:21,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:21,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:22,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:22,027 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:22,027 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:22,042 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:47:22,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:22,098 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:22,467 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:22,467 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-10-02 11:47:22,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-02 11:47:22,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-02 11:47:22,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:47:22,469 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-10-02 11:47:22,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:22,571 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-02 11:47:22,572 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-02 11:47:22,573 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-10-02 11:47:22,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:22,573 INFO L225 Difference]: With dead ends: 21 [2018-10-02 11:47:22,574 INFO L226 Difference]: Without dead ends: 13 [2018-10-02 11:47:22,574 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-02 11:47:22,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-02 11:47:22,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-02 11:47:22,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-02 11:47:22,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-02 11:47:22,580 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-02 11:47:22,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:22,580 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-02 11:47:22,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-02 11:47:22,580 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-02 11:47:22,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-02 11:47:22,581 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:22,581 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-10-02 11:47:22,582 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:22,582 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:22,582 INFO L82 PathProgramCache]: Analyzing trace with hash -928778543, now seen corresponding path program 2 times [2018-10-02 11:47:22,582 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:22,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:22,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:22,584 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:47:22,584 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-02 11:47:22,864 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:22,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:22,874 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:47:22,895 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:47:22,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:22,898 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:23,058 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-02 11:47:23,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:23,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2018-10-02 11:47:23,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-02 11:47:23,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-02 11:47:23,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-02 11:47:23,082 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-10-02 11:47:23,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:23,574 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2018-10-02 11:47:23,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-02 11:47:23,576 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-10-02 11:47:23,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:23,577 INFO L225 Difference]: With dead ends: 43 [2018-10-02 11:47:23,579 INFO L226 Difference]: Without dead ends: 33 [2018-10-02 11:47:23,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:47:23,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-02 11:47:23,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2018-10-02 11:47:23,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-02 11:47:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-02 11:47:23,590 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2018-10-02 11:47:23,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:23,591 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-02 11:47:23,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-02 11:47:23,591 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-02 11:47:23,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-02 11:47:23,592 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:23,592 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 3, 2, 2, 1, 1, 1] [2018-10-02 11:47:23,593 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:23,593 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:23,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1778757007, now seen corresponding path program 3 times [2018-10-02 11:47:23,593 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:23,593 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:23,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:23,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:23,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:23,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-02 11:47:23,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:23,754 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:23,773 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:47:23,833 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-02 11:47:23,834 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:23,837 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-02 11:47:24,125 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:24,125 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2018-10-02 11:47:24,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-02 11:47:24,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-02 11:47:24,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-02 11:47:24,126 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-10-02 11:47:24,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:24,800 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2018-10-02 11:47:24,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-02 11:47:24,801 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-10-02 11:47:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:24,802 INFO L225 Difference]: With dead ends: 65 [2018-10-02 11:47:24,802 INFO L226 Difference]: Without dead ends: 51 [2018-10-02 11:47:24,803 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 [2018-10-02 11:47:24,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-02 11:47:24,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-10-02 11:47:24,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-02 11:47:24,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-10-02 11:47:24,816 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 24 [2018-10-02 11:47:24,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:24,816 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-10-02 11:47:24,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-02 11:47:24,817 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-10-02 11:47:24,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-02 11:47:24,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:24,818 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-10-02 11:47:24,819 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:24,819 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:24,819 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-10-02 11:47:24,819 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:24,820 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:24,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:24,821 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:24,821 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:24,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 106 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-02 11:47:25,057 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:25,057 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:25,065 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:47:25,100 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:47:25,100 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:25,105 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:25,219 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 106 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-02 11:47:25,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:25,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-10-02 11:47:25,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-02 11:47:25,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-02 11:47:25,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:47:25,241 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 13 states. [2018-10-02 11:47:25,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:25,287 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2018-10-02 11:47:25,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:47:25,291 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2018-10-02 11:47:25,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:25,292 INFO L225 Difference]: With dead ends: 75 [2018-10-02 11:47:25,292 INFO L226 Difference]: Without dead ends: 47 [2018-10-02 11:47:25,293 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-10-02 11:47:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-02 11:47:25,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-02 11:47:25,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-02 11:47:25,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-10-02 11:47:25,306 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2018-10-02 11:47:25,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:25,306 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-10-02 11:47:25,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-02 11:47:25,307 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-10-02 11:47:25,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-02 11:47:25,309 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:25,309 INFO L375 BasicCegarLoop]: trace histogram [18, 15, 4, 3, 3, 1, 1, 1] [2018-10-02 11:47:25,309 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:25,310 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:25,310 INFO L82 PathProgramCache]: Analyzing trace with hash -254509681, now seen corresponding path program 5 times [2018-10-02 11:47:25,310 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:25,310 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:25,311 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:25,311 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:25,312 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 150 proven. 30 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-10-02 11:47:25,444 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:25,444 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:25,459 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:47:25,506 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-02 11:47:25,506 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:25,510 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 150 proven. 30 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-10-02 11:47:25,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:25,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-10-02 11:47:25,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-02 11:47:25,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-02 11:47:25,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:47:25,753 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 15 states. [2018-10-02 11:47:25,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:25,828 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2018-10-02 11:47:25,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:47:25,828 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2018-10-02 11:47:25,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:25,829 INFO L225 Difference]: With dead ends: 85 [2018-10-02 11:47:25,829 INFO L226 Difference]: Without dead ends: 53 [2018-10-02 11:47:25,830 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-10-02 11:47:25,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-02 11:47:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-02 11:47:25,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-02 11:47:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2018-10-02 11:47:25,844 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2018-10-02 11:47:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:25,844 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2018-10-02 11:47:25,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-02 11:47:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2018-10-02 11:47:25,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-02 11:47:25,846 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:25,846 INFO L375 BasicCegarLoop]: trace histogram [21, 18, 4, 3, 3, 1, 1, 1] [2018-10-02 11:47:25,846 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:25,846 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:25,847 INFO L82 PathProgramCache]: Analyzing trace with hash -996261859, now seen corresponding path program 6 times [2018-10-02 11:47:25,847 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:25,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:25,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:25,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:25,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:25,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:25,995 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 202 proven. 42 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-10-02 11:47:25,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:25,996 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:26,003 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:47:26,021 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-02 11:47:26,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:26,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-02 11:47:26,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:26,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2018-10-02 11:47:26,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:47:26,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:47:26,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:47:26,162 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 14 states. [2018-10-02 11:47:26,639 WARN L178 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-02 11:47:27,315 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-02 11:47:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:28,419 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2018-10-02 11:47:28,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-02 11:47:28,419 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2018-10-02 11:47:28,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:28,420 INFO L225 Difference]: With dead ends: 129 [2018-10-02 11:47:28,420 INFO L226 Difference]: Without dead ends: 93 [2018-10-02 11:47:28,423 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=850, Invalid=1906, Unknown=0, NotChecked=0, Total=2756 [2018-10-02 11:47:28,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-02 11:47:28,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2018-10-02 11:47:28,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-02 11:47:28,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2018-10-02 11:47:28,443 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 52 [2018-10-02 11:47:28,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:28,443 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2018-10-02 11:47:28,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:47:28,444 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2018-10-02 11:47:28,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-02 11:47:28,445 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:28,445 INFO L375 BasicCegarLoop]: trace histogram [32, 28, 5, 4, 4, 1, 1, 1] [2018-10-02 11:47:28,446 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:28,446 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:28,446 INFO L82 PathProgramCache]: Analyzing trace with hash -252111625, now seen corresponding path program 7 times [2018-10-02 11:47:28,446 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:28,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:28,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:28,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:28,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:28,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 392 proven. 56 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2018-10-02 11:47:28,808 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:28,808 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:28,823 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:47:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:28,873 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 392 proven. 56 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2018-10-02 11:47:29,284 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:29,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-10-02 11:47:29,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-02 11:47:29,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-02 11:47:29,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2018-10-02 11:47:29,285 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 19 states. [2018-10-02 11:47:29,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:29,363 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2018-10-02 11:47:29,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:47:29,371 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2018-10-02 11:47:29,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:29,372 INFO L225 Difference]: With dead ends: 143 [2018-10-02 11:47:29,372 INFO L226 Difference]: Without dead ends: 85 [2018-10-02 11:47:29,373 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 [2018-10-02 11:47:29,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-02 11:47:29,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-02 11:47:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-02 11:47:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2018-10-02 11:47:29,392 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 76 [2018-10-02 11:47:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:29,392 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2018-10-02 11:47:29,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-02 11:47:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2018-10-02 11:47:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-02 11:47:29,394 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:29,394 INFO L375 BasicCegarLoop]: trace histogram [36, 32, 5, 4, 4, 1, 1, 1] [2018-10-02 11:47:29,394 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:29,394 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:29,395 INFO L82 PathProgramCache]: Analyzing trace with hash 771511391, now seen corresponding path program 8 times [2018-10-02 11:47:29,395 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:29,395 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:29,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:29,396 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:47:29,396 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 494 proven. 72 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-10-02 11:47:29,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:29,651 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:29,662 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:47:29,722 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:47:29,723 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:29,727 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 494 proven. 72 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-10-02 11:47:29,896 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:29,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-10-02 11:47:29,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-02 11:47:29,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-02 11:47:29,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:47:29,897 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 21 states. [2018-10-02 11:47:29,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:29,943 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2018-10-02 11:47:29,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-02 11:47:29,950 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2018-10-02 11:47:29,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:29,951 INFO L225 Difference]: With dead ends: 157 [2018-10-02 11:47:29,952 INFO L226 Difference]: Without dead ends: 93 [2018-10-02 11:47:29,952 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2018-10-02 11:47:29,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-02 11:47:29,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-02 11:47:29,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-02 11:47:29,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2018-10-02 11:47:29,972 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 84 [2018-10-02 11:47:29,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:29,973 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2018-10-02 11:47:29,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-02 11:47:29,973 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2018-10-02 11:47:29,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-02 11:47:29,974 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:29,975 INFO L375 BasicCegarLoop]: trace histogram [40, 36, 5, 4, 4, 1, 1, 1] [2018-10-02 11:47:29,975 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:29,975 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:29,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1630563271, now seen corresponding path program 9 times [2018-10-02 11:47:29,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:29,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:29,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:29,977 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:29,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 608 proven. 90 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-10-02 11:47:30,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:30,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:30,167 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:47:30,261 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-02 11:47:30,261 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:30,267 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 608 proven. 90 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-10-02 11:47:30,666 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:30,666 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-10-02 11:47:30,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-02 11:47:30,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-02 11:47:30,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-02 11:47:30,667 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 23 states. [2018-10-02 11:47:30,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:30,746 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2018-10-02 11:47:30,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:47:30,748 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2018-10-02 11:47:30,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:30,749 INFO L225 Difference]: With dead ends: 171 [2018-10-02 11:47:30,749 INFO L226 Difference]: Without dead ends: 101 [2018-10-02 11:47:30,750 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 [2018-10-02 11:47:30,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-02 11:47:30,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-02 11:47:30,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-02 11:47:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2018-10-02 11:47:30,768 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2018-10-02 11:47:30,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:30,769 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2018-10-02 11:47:30,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-02 11:47:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2018-10-02 11:47:30,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-02 11:47:30,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:30,770 INFO L375 BasicCegarLoop]: trace histogram [44, 40, 5, 4, 4, 1, 1, 1] [2018-10-02 11:47:30,771 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:30,771 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:30,771 INFO L82 PathProgramCache]: Analyzing trace with hash -220374225, now seen corresponding path program 10 times [2018-10-02 11:47:30,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:30,771 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:30,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:30,772 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:30,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:30,946 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1472 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-02 11:47:30,947 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:30,947 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:30,954 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-02 11:47:31,016 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-02 11:47:31,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:31,020 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:31,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1472 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-02 11:47:31,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:31,149 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-10-02 11:47:31,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-02 11:47:31,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-02 11:47:31,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-02 11:47:31,150 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 12 states. [2018-10-02 11:47:31,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:31,406 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-10-02 11:47:31,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-02 11:47:31,407 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2018-10-02 11:47:31,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:31,409 INFO L225 Difference]: With dead ends: 149 [2018-10-02 11:47:31,409 INFO L226 Difference]: Without dead ends: 147 [2018-10-02 11:47:31,410 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 [2018-10-02 11:47:31,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-02 11:47:31,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 125. [2018-10-02 11:47:31,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-02 11:47:31,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2018-10-02 11:47:31,447 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 100 [2018-10-02 11:47:31,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:31,448 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2018-10-02 11:47:31,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-02 11:47:31,448 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2018-10-02 11:47:31,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-02 11:47:31,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:31,449 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 6, 5, 5, 1, 1, 1] [2018-10-02 11:47:31,450 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:31,450 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:31,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1446024969, now seen corresponding path program 11 times [2018-10-02 11:47:31,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:31,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:31,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:31,451 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:31,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:31,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:31,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-02 11:47:31,703 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:31,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:31,713 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-02 11:47:31,791 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-02 11:47:31,791 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:31,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:31,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-02 11:47:31,992 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:31,992 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-02 11:47:31,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-02 11:47:31,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-02 11:47:31,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:47:31,993 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand 14 states. [2018-10-02 11:47:32,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:32,155 INFO L93 Difference]: Finished difference Result 173 states and 180 transitions. [2018-10-02 11:47:32,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-02 11:47:32,156 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 124 [2018-10-02 11:47:32,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:32,158 INFO L225 Difference]: With dead ends: 173 [2018-10-02 11:47:32,158 INFO L226 Difference]: Without dead ends: 171 [2018-10-02 11:47:32,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-02 11:47:32,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-02 11:47:32,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 149. [2018-10-02 11:47:32,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-02 11:47:32,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 155 transitions. [2018-10-02 11:47:32,191 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 155 transitions. Word has length 124 [2018-10-02 11:47:32,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:32,191 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 155 transitions. [2018-10-02 11:47:32,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-02 11:47:32,192 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 155 transitions. [2018-10-02 11:47:32,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-02 11:47:32,194 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:32,195 INFO L375 BasicCegarLoop]: trace histogram [66, 60, 7, 6, 6, 1, 1, 1] [2018-10-02 11:47:32,195 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:32,195 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:32,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1667523811, now seen corresponding path program 12 times [2018-10-02 11:47:32,195 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:32,195 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:32,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:32,196 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:32,197 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:32,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 3672 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-02 11:47:32,716 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:32,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:32,726 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-02 11:47:32,841 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-02 11:47:32,841 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:32,845 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 3672 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-02 11:47:33,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:33,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-10-02 11:47:33,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-02 11:47:33,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-02 11:47:33,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:47:33,043 INFO L87 Difference]: Start difference. First operand 149 states and 155 transitions. Second operand 16 states. [2018-10-02 11:47:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:33,216 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2018-10-02 11:47:33,217 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-02 11:47:33,217 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 148 [2018-10-02 11:47:33,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:33,218 INFO L225 Difference]: With dead ends: 197 [2018-10-02 11:47:33,218 INFO L226 Difference]: Without dead ends: 195 [2018-10-02 11:47:33,219 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-02 11:47:33,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-02 11:47:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2018-10-02 11:47:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-02 11:47:33,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 180 transitions. [2018-10-02 11:47:33,248 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 180 transitions. Word has length 148 [2018-10-02 11:47:33,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:33,249 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 180 transitions. [2018-10-02 11:47:33,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-02 11:47:33,249 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 180 transitions. [2018-10-02 11:47:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-02 11:47:33,250 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:33,251 INFO L375 BasicCegarLoop]: trace histogram [77, 70, 8, 7, 7, 1, 1, 1] [2018-10-02 11:47:33,251 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:33,251 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:33,251 INFO L82 PathProgramCache]: Analyzing trace with hash 107136189, now seen corresponding path program 13 times [2018-10-02 11:47:33,251 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:33,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:33,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:33,252 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:33,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 5138 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-02 11:47:33,540 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:33,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:33,548 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:47:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:33,622 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:33,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 5138 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-02 11:47:33,871 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:33,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-02 11:47:33,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-02 11:47:33,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-02 11:47:33,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:47:33,873 INFO L87 Difference]: Start difference. First operand 173 states and 180 transitions. Second operand 18 states. [2018-10-02 11:47:33,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:33,987 INFO L93 Difference]: Finished difference Result 221 states and 230 transitions. [2018-10-02 11:47:33,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-02 11:47:33,988 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 172 [2018-10-02 11:47:33,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:33,989 INFO L225 Difference]: With dead ends: 221 [2018-10-02 11:47:33,989 INFO L226 Difference]: Without dead ends: 219 [2018-10-02 11:47:33,990 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-02 11:47:33,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-02 11:47:34,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 197. [2018-10-02 11:47:34,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-02 11:47:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 205 transitions. [2018-10-02 11:47:34,023 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 205 transitions. Word has length 172 [2018-10-02 11:47:34,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:34,023 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 205 transitions. [2018-10-02 11:47:34,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-02 11:47:34,023 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 205 transitions. [2018-10-02 11:47:34,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-02 11:47:34,025 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:34,026 INFO L375 BasicCegarLoop]: trace histogram [88, 80, 9, 8, 8, 1, 1, 1] [2018-10-02 11:47:34,026 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:34,026 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:34,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1927956841, now seen corresponding path program 14 times [2018-10-02 11:47:34,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:34,027 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:34,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:34,027 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-02 11:47:34,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 0 proven. 6848 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-02 11:47:34,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:34,826 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:34,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-02 11:47:34,921 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-02 11:47:34,922 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:34,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:35,112 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 0 proven. 6848 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-02 11:47:35,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:35,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-10-02 11:47:35,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-02 11:47:35,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-02 11:47:35,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:47:35,134 INFO L87 Difference]: Start difference. First operand 197 states and 205 transitions. Second operand 20 states. [2018-10-02 11:47:35,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:35,282 INFO L93 Difference]: Finished difference Result 245 states and 255 transitions. [2018-10-02 11:47:35,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-02 11:47:35,283 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 196 [2018-10-02 11:47:35,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:35,284 INFO L225 Difference]: With dead ends: 245 [2018-10-02 11:47:35,284 INFO L226 Difference]: Without dead ends: 243 [2018-10-02 11:47:35,285 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-02 11:47:35,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-02 11:47:35,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2018-10-02 11:47:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-02 11:47:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 230 transitions. [2018-10-02 11:47:35,329 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 230 transitions. Word has length 196 [2018-10-02 11:47:35,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:35,330 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 230 transitions. [2018-10-02 11:47:35,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-02 11:47:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 230 transitions. [2018-10-02 11:47:35,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-02 11:47:35,332 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:35,332 INFO L375 BasicCegarLoop]: trace histogram [99, 90, 10, 9, 9, 1, 1, 1] [2018-10-02 11:47:35,333 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:35,333 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:35,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1486407055, now seen corresponding path program 15 times [2018-10-02 11:47:35,333 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:35,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:35,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:35,334 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:35,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:35,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:35,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9792 backedges. 0 proven. 8802 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-02 11:47:35,727 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-02 11:47:35,728 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-02 11:47:35,736 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-02 11:47:35,888 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2018-10-02 11:47:35,888 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-02 11:47:35,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-02 11:47:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9792 backedges. 0 proven. 8802 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-02 11:47:36,122 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-02 11:47:36,122 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-02 11:47:36,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-02 11:47:36,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-02 11:47:36,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-02 11:47:36,125 INFO L87 Difference]: Start difference. First operand 221 states and 230 transitions. Second operand 22 states. [2018-10-02 11:47:36,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:36,405 INFO L93 Difference]: Finished difference Result 269 states and 280 transitions. [2018-10-02 11:47:36,406 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-02 11:47:36,406 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 220 [2018-10-02 11:47:36,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:36,408 INFO L225 Difference]: With dead ends: 269 [2018-10-02 11:47:36,408 INFO L226 Difference]: Without dead ends: 267 [2018-10-02 11:47:36,409 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 [2018-10-02 11:47:36,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-02 11:47:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 245. [2018-10-02 11:47:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-02 11:47:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 255 transitions. [2018-10-02 11:47:36,452 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 255 transitions. Word has length 220 [2018-10-02 11:47:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:36,452 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 255 transitions. [2018-10-02 11:47:36,452 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-02 11:47:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 255 transitions. [2018-10-02 11:47:36,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-02 11:47:36,454 INFO L367 BasicCegarLoop]: Found error trace [2018-10-02 11:47:36,454 INFO L375 BasicCegarLoop]: trace histogram [110, 100, 11, 10, 10, 1, 1, 1] [2018-10-02 11:47:36,454 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-02 11:47:36,454 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-02 11:47:36,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1732333643, now seen corresponding path program 16 times [2018-10-02 11:47:36,455 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-02 11:47:36,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-02 11:47:36,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:36,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-02 11:47:36,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-02 11:47:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-02 11:47:41,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 12082 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-02 11:47:41,727 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-02 11:47:41,728 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2018-10-02 11:47:41,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-02 11:47:41,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-02 11:47:41,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-02 11:47:41,732 INFO L87 Difference]: Start difference. First operand 245 states and 255 transitions. Second operand 103 states. [2018-10-02 11:47:44,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-02 11:47:44,714 INFO L93 Difference]: Finished difference Result 10235 states and 10695 transitions. [2018-10-02 11:47:44,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-02 11:47:44,715 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 244 [2018-10-02 11:47:44,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-02 11:47:44,716 INFO L225 Difference]: With dead ends: 10235 [2018-10-02 11:47:44,716 INFO L226 Difference]: Without dead ends: 0 [2018-10-02 11:47:44,731 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-02 11:47:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-02 11:47:44,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-02 11:47:44,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-02 11:47:44,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-02 11:47:44,732 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 244 [2018-10-02 11:47:44,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-02 11:47:44,733 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-02 11:47:44,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-02 11:47:44,733 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-02 11:47:44,733 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-02 11:47:44,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-02 11:47:51,995 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:51,997 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:52,007 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:52,155 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:52,239 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:52,286 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:52,386 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:52,421 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:52,589 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:52,667 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:52,872 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:52,943 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:53,253 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:53,302 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:53,669 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:53,772 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:54,024 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:54,235 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:54,418 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:54,800 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:54,905 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:55,623 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:55,728 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:55,834 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:56,087 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:56,447 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:57,010 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:57,470 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:57,771 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:57,961 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:58,132 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:58,324 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:59,286 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:59,419 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:59,743 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:47:59,882 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:00,521 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:00,738 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:00,868 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:01,330 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:01,506 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:01,671 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:01,710 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:02,306 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:02,438 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:02,477 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:02,579 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:02,619 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:02,719 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:02,852 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:03,969 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:03,980 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:04,420 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:05,026 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:05,490 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:05,916 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:06,373 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:08,565 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:10,482 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:10,786 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:11,275 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:11,289 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:14,009 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:15,298 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:15,491 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:16,066 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:16,977 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:19,314 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:21,084 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:23,649 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:26,147 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:29,963 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:30,127 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:48:37,797 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:01,625 WARN L178 SmtUtils]: Spent 1.28 m on a formula simplification. DAG size of input: 5105 DAG size of output: 1935 [2018-10-02 11:49:06,137 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:06,138 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:06,142 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:06,205 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:06,245 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:06,267 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:06,315 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:06,332 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:06,415 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:06,457 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:06,570 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:06,608 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:06,899 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:06,924 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:07,023 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:07,073 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:07,192 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:07,292 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:07,380 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:07,579 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:07,645 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:08,150 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:08,238 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:08,328 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:08,549 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:08,798 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:09,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:09,538 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:09,791 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:09,950 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:10,230 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:10,389 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:11,090 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:11,206 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:11,471 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:11,593 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:12,166 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:12,362 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:12,464 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:12,878 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:13,005 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:13,124 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:13,152 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:13,764 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:13,886 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:13,924 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:14,020 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:14,058 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:14,153 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:14,280 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:15,368 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:15,379 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:15,700 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:16,277 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:16,856 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:17,271 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:17,708 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:19,557 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:21,504 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:21,664 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:22,152 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:22,165 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:24,973 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:26,137 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:26,356 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:27,069 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:28,083 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:30,483 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:32,238 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:34,734 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:37,010 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:40,787 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:40,946 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:49:48,200 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-02 11:50:11,307 WARN L178 SmtUtils]: Spent 1.16 m on a formula simplification. DAG size of input: 5105 DAG size of output: 1935 [2018-10-02 11:50:12,108 WARN L178 SmtUtils]: Spent 797.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-10-02 11:50:12,918 WARN L178 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-10-02 11:51:26,133 WARN L178 SmtUtils]: Spent 1.22 m on a formula simplification. DAG size of input: 1932 DAG size of output: 362 Received shutdown request... [2018-10-02 11:51:35,322 WARN L186 SmtUtils]: Removed 1196 from assertion stack [2018-10-02 11:51:35,323 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-10-02 11:51:35,324 INFO L168 Benchmark]: Toolchain (without parser) took 254510.53 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 1.3 GB in the end (delta: 134.2 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-10-02 11:51:35,325 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.32 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. [2018-10-02 11:51:35,325 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.75 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-02 11:51:35,328 INFO L168 Benchmark]: Boogie Preprocessor took 21.41 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. [2018-10-02 11:51:35,329 INFO L168 Benchmark]: RCFGBuilder took 381.13 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. [2018-10-02 11:51:35,329 INFO L168 Benchmark]: TraceAbstraction took 254059.65 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 1.3 GB in the end (delta: 113.1 MB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-10-02 11:51:35,336 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 0.32 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 42.75 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.41 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 381.13 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 254059.65 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 1.3 GB in the end (delta: 113.1 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-0-2018-10-02_11-51-35-354.csv Completed graceful shutdown