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/toy/tooDifficultLoopInvariant/ArrayInit02.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:28:45,704 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:28:45,706 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:28:45,718 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:28:45,718 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:28:45,719 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:28:45,721 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:28:45,722 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:28:45,724 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:28:45,725 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:28:45,726 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 12:28:45,748 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 [2018-10-04 12:28:45,762 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:28:45,762 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:28:45,763 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:28:45,763 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:28:45,764 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:28:45,764 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:28:45,764 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:28:45,765 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:28:45,765 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:28:45,765 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:28:45,765 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:28:45,765 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:28:45,765 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:28:45,766 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:28:45,766 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:28:45,766 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:28:45,766 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:28:45,766 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:28:45,767 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:28:45,767 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:28:45,767 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:28:45,767 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:28:45,767 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:28:45,768 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:28:45,768 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:28:45,768 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:28:45,768 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:28:45,768 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:28:45,769 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:28:45,769 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:28:45,813 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:28:45,825 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:28:45,829 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:28:45,830 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:28:45,831 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:28:45,831 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl [2018-10-04 12:28:45,832 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/tooDifficultLoopInvariant/ArrayInit02.bpl' [2018-10-04 12:28:45,882 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:28:45,884 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:28:45,885 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:28:45,885 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:28:45,885 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:28:45,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:45" (1/1) ... [2018-10-04 12:28:45,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:45" (1/1) ... [2018-10-04 12:28:45,926 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:28:45,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:28:45,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:28:45,928 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:28:45,939 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:45" (1/1) ... [2018-10-04 12:28:45,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:45" (1/1) ... [2018-10-04 12:28:45,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:45" (1/1) ... [2018-10-04 12:28:45,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:45" (1/1) ... [2018-10-04 12:28:45,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:45" (1/1) ... [2018-10-04 12:28:45,948 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:45" (1/1) ... [2018-10-04 12:28:45,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:45" (1/1) ... [2018-10-04 12:28:45,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:28:45,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:28:45,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:28:45,951 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:28:45,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:45" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:28:46,025 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2018-10-04 12:28:46,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:28:46,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:28:46,302 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:28:46,303 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:28:46 BoogieIcfgContainer [2018-10-04 12:28:46,303 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:28:46,304 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:28:46,304 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:28:46,308 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:28:46,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:28:45" (1/2) ... [2018-10-04 12:28:46,309 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a11b1c4 and model type ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:28:46, skipping insertion in model container [2018-10-04 12:28:46,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:28:46" (2/2) ... [2018-10-04 12:28:46,311 INFO L112 eAbstractionObserver]: Analyzing ICFG ArrayInit02.bpl [2018-10-04 12:28:46,321 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:28:46,329 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:28:46,380 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:28:46,381 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:28:46,381 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:28:46,381 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:28:46,381 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:28:46,382 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:28:46,382 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:28:46,382 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:28:46,382 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:28:46,398 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2018-10-04 12:28:46,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:28:46,405 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:46,406 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 12:28:46,407 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:46,412 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:46,413 INFO L82 PathProgramCache]: Analyzing trace with hash 900035954, now seen corresponding path program 1 times [2018-10-04 12:28:46,415 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:46,416 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:46,461 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:46,462 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:46,462 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:46,661 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:28:46,661 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:28:46,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:28:46,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:28:46,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:28:46,686 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 4 states. [2018-10-04 12:28:46,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:46,873 INFO L93 Difference]: Finished difference Result 26 states and 34 transitions. [2018-10-04 12:28:46,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:28:46,875 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 12:28:46,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:46,892 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:28:46,892 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:28:46,897 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 [2018-10-04 12:28:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:28:46,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2018-10-04 12:28:46,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:28:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2018-10-04 12:28:46,938 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 6 [2018-10-04 12:28:46,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:46,938 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2018-10-04 12:28:46,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:28:46,938 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2018-10-04 12:28:46,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:28:46,939 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:46,939 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:28:46,939 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:46,939 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:46,940 INFO L82 PathProgramCache]: Analyzing trace with hash 429804648, now seen corresponding path program 1 times [2018-10-04 12:28:46,940 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:46,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:46,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:46,941 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:46,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:47,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:47,029 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:28:47,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2018-10-04 12:28:47,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:28:47,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:28:47,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:28:47,032 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand 4 states. [2018-10-04 12:28:47,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:47,139 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2018-10-04 12:28:47,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:28:47,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2018-10-04 12:28:47,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:47,140 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:28:47,140 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:28:47,142 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:28:47,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:28:47,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2018-10-04 12:28:47,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:28:47,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 26 transitions. [2018-10-04 12:28:47,148 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 26 transitions. Word has length 9 [2018-10-04 12:28:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:47,148 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 26 transitions. [2018-10-04 12:28:47,148 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:28:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 26 transitions. [2018-10-04 12:28:47,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:28:47,149 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:47,149 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:28:47,150 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:47,150 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:47,150 INFO L82 PathProgramCache]: Analyzing trace with hash 429806570, now seen corresponding path program 1 times [2018-10-04 12:28:47,150 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:47,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:47,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:47,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:47,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:47,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2018-10-04 12:28:47,201 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:28:47,202 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:28:47,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:28:47,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:28:47,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:28:47,203 INFO L87 Difference]: Start difference. First operand 19 states and 26 transitions. Second operand 3 states. [2018-10-04 12:28:47,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:47,225 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2018-10-04 12:28:47,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:28:47,225 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2018-10-04 12:28:47,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:47,226 INFO L225 Difference]: With dead ends: 24 [2018-10-04 12:28:47,226 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:28:47,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:28:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:28:47,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2018-10-04 12:28:47,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 12:28:47,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2018-10-04 12:28:47,230 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2018-10-04 12:28:47,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:47,230 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2018-10-04 12:28:47,231 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:28:47,231 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2018-10-04 12:28:47,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:28:47,231 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:47,232 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:28:47,232 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:47,232 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:47,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2090155286, now seen corresponding path program 1 times [2018-10-04 12:28:47,233 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:47,233 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:47,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:47,234 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:47,234 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:47,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:47,564 WARN L178 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 15 [2018-10-04 12:28:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:47,615 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:47,615 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:47,626 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:47,650 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:47,823 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:47,823 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2018-10-04 12:28:47,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:28:47,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:28:47,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:28:47,825 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 7 states. [2018-10-04 12:28:48,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:48,160 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2018-10-04 12:28:48,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:28:48,163 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2018-10-04 12:28:48,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:48,164 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:28:48,164 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:28:48,165 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:28:48,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:28:48,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 14. [2018-10-04 12:28:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:28:48,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2018-10-04 12:28:48,169 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2018-10-04 12:28:48,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:48,170 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2018-10-04 12:28:48,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:28:48,170 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2018-10-04 12:28:48,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 12:28:48,171 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:48,171 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:28:48,172 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:48,172 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:48,172 INFO L82 PathProgramCache]: Analyzing trace with hash -368470767, now seen corresponding path program 1 times [2018-10-04 12:28:48,172 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:48,173 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:48,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:48,174 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:48,174 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:48,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:48,286 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:48,287 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:48,296 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:48,314 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:48,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:48,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2018-10-04 12:28:48,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:28:48,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:28:48,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:28:48,432 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 8 states. [2018-10-04 12:28:48,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:48,829 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2018-10-04 12:28:48,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:28:48,830 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2018-10-04 12:28:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:48,831 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:28:48,831 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:28:48,831 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:28:48,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:28:48,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2018-10-04 12:28:48,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:28:48,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2018-10-04 12:28:48,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2018-10-04 12:28:48,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:48,836 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2018-10-04 12:28:48,836 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:28:48,836 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2018-10-04 12:28:48,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:28:48,837 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:48,837 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2018-10-04 12:28:48,838 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:48,838 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:48,838 INFO L82 PathProgramCache]: Analyzing trace with hash -256855911, now seen corresponding path program 2 times [2018-10-04 12:28:48,838 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:48,838 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:48,839 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:48,840 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:48,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:48,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:49,107 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:49,107 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:49,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:28:49,138 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:28:49,138 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:28:49,142 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:49,416 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:49,417 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2018-10-04 12:28:49,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:28:49,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:28:49,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:28:49,418 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 15 states. [2018-10-04 12:28:50,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:50,207 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2018-10-04 12:28:50,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:28:50,208 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2018-10-04 12:28:50,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:50,209 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:28:50,209 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:28:50,211 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:28:50,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:28:50,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2018-10-04 12:28:50,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 12:28:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2018-10-04 12:28:50,216 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2018-10-04 12:28:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:50,216 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2018-10-04 12:28:50,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:28:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2018-10-04 12:28:50,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 12:28:50,217 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:50,218 INFO L375 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 12:28:50,218 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:50,218 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:50,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1324912968, now seen corresponding path program 3 times [2018-10-04 12:28:50,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:50,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:50,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:50,220 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:28:50,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:50,448 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:50,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:50,467 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:28:50,477 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:28:50,477 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:28:50,480 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:50,726 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:50,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2018-10-04 12:28:50,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:28:50,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:28:50,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:28:50,728 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 14 states. [2018-10-04 12:28:51,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:51,224 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2018-10-04 12:28:51,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:28:51,232 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 23 [2018-10-04 12:28:51,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:51,233 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:28:51,233 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:28:51,234 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:28:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:28:51,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2018-10-04 12:28:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 12:28:51,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2018-10-04 12:28:51,240 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2018-10-04 12:28:51,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:51,240 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2018-10-04 12:28:51,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:28:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2018-10-04 12:28:51,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 12:28:51,242 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:51,242 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 12:28:51,242 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:51,242 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:51,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1588570591, now seen corresponding path program 4 times [2018-10-04 12:28:51,243 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:51,243 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:51,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:51,244 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:28:51,244 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:51,354 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:51,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:51,354 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:51,363 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:28:51,375 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:28:51,375 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:28:51,377 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:51,487 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:51,487 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2018-10-04 12:28:51,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:28:51,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:28:51,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:28:51,490 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 14 states. [2018-10-04 12:28:51,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:51,973 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2018-10-04 12:28:51,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:28:51,973 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2018-10-04 12:28:51,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:51,974 INFO L225 Difference]: With dead ends: 60 [2018-10-04 12:28:51,974 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:28:51,975 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:28:51,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:28:51,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2018-10-04 12:28:51,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:28:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2018-10-04 12:28:51,981 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2018-10-04 12:28:51,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:51,981 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2018-10-04 12:28:51,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:28:51,982 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2018-10-04 12:28:51,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:28:51,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:51,983 INFO L375 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2018-10-04 12:28:51,984 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:51,984 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:51,984 INFO L82 PathProgramCache]: Analyzing trace with hash 366737255, now seen corresponding path program 5 times [2018-10-04 12:28:51,984 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:51,984 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:51,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:51,985 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:28:51,985 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:52,209 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:52,210 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:52,210 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:52,219 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:28:52,231 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2018-10-04 12:28:52,232 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:28:52,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:52,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:52,454 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2018-10-04 12:28:52,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:28:52,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:28:52,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:28:52,455 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 17 states. [2018-10-04 12:28:53,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:53,143 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2018-10-04 12:28:53,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:28:53,143 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2018-10-04 12:28:53,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:53,144 INFO L225 Difference]: With dead ends: 64 [2018-10-04 12:28:53,144 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 12:28:53,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:28:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 12:28:53,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2018-10-04 12:28:53,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:28:53,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2018-10-04 12:28:53,152 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2018-10-04 12:28:53,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:53,152 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2018-10-04 12:28:53,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:28:53,152 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2018-10-04 12:28:53,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:28:53,153 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:53,153 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-04 12:28:53,154 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:53,154 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:53,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1079885042, now seen corresponding path program 6 times [2018-10-04 12:28:53,154 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:53,154 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:53,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:53,155 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:28:53,155 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:53,320 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:53,320 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:53,338 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:28:53,356 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 12:28:53,356 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:28:53,358 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:53,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:53,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2018-10-04 12:28:53,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:28:53,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:28:53,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:28:53,536 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 17 states. [2018-10-04 12:28:53,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:53,755 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2018-10-04 12:28:53,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:28:53,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2018-10-04 12:28:53,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:53,756 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:28:53,756 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 12:28:53,757 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:28:53,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 12:28:53,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2018-10-04 12:28:53,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 12:28:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2018-10-04 12:28:53,764 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2018-10-04 12:28:53,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:53,764 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2018-10-04 12:28:53,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:28:53,765 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2018-10-04 12:28:53,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 12:28:53,766 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:53,766 INFO L375 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2018-10-04 12:28:53,766 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:53,766 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:53,767 INFO L82 PathProgramCache]: Analyzing trace with hash -921359226, now seen corresponding path program 7 times [2018-10-04 12:28:53,767 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:53,767 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:53,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:53,768 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:28:53,768 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:53,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:54,525 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:54,526 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:54,533 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:54,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:54,554 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:54,688 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 4 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:54,709 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:54,709 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2018-10-04 12:28:54,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:28:54,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:28:54,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:28:54,711 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 20 states. [2018-10-04 12:28:55,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:55,417 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2018-10-04 12:28:55,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:28:55,417 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 37 [2018-10-04 12:28:55,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:55,418 INFO L225 Difference]: With dead ends: 79 [2018-10-04 12:28:55,419 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:28:55,420 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:28:55,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:28:55,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 42. [2018-10-04 12:28:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 12:28:55,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2018-10-04 12:28:55,429 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2018-10-04 12:28:55,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:55,429 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2018-10-04 12:28:55,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:28:55,429 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2018-10-04 12:28:55,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 12:28:55,430 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:55,430 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-04 12:28:55,431 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:55,431 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:55,431 INFO L82 PathProgramCache]: Analyzing trace with hash 451793069, now seen corresponding path program 8 times [2018-10-04 12:28:55,431 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:55,431 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:55,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:55,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:28:55,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:55,604 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:55,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:55,605 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:55,615 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:28:55,624 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:28:55,624 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:28:55,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:56,006 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 55 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:56,026 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:56,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2018-10-04 12:28:56,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:28:56,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:28:56,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:28:56,028 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 20 states. [2018-10-04 12:28:56,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:28:56,555 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2018-10-04 12:28:56,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:28:56,556 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2018-10-04 12:28:56,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:28:56,557 INFO L225 Difference]: With dead ends: 90 [2018-10-04 12:28:56,557 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:28:56,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:28:56,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:28:56,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2018-10-04 12:28:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:28:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2018-10-04 12:28:56,566 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2018-10-04 12:28:56,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:28:56,567 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2018-10-04 12:28:56,567 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:28:56,567 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2018-10-04 12:28:56,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:28:56,568 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:28:56,568 INFO L375 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1] [2018-10-04 12:28:56,568 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:28:56,568 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:28:56,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1868574667, now seen corresponding path program 9 times [2018-10-04 12:28:56,569 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:28:56,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:28:56,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:56,570 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:28:56,570 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:28:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:28:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 5 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:56,853 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:28:56,853 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:28:56,867 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:28:56,885 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-10-04 12:28:56,885 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:28:56,887 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:28:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 50 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:28:57,422 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:28:57,423 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2018-10-04 12:28:57,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:28:57,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:28:57,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:28:57,424 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 31 states. [2018-10-04 12:28:58,117 WARN L178 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 10 DAG size of output: 8 [2018-10-04 12:29:00,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:00,529 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2018-10-04 12:29:00,530 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:29:00,530 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 44 [2018-10-04 12:29:00,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:00,531 INFO L225 Difference]: With dead ends: 116 [2018-10-04 12:29:00,532 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:29:00,534 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 919 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=469, Invalid=3953, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:29:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:29:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2018-10-04 12:29:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 12:29:00,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2018-10-04 12:29:00,545 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 44 [2018-10-04 12:29:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:00,546 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2018-10-04 12:29:00,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:29:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2018-10-04 12:29:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 12:29:00,551 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:00,552 INFO L375 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1] [2018-10-04 12:29:00,552 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:00,552 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:00,552 INFO L82 PathProgramCache]: Analyzing trace with hash 2089942100, now seen corresponding path program 10 times [2018-10-04 12:29:00,552 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:00,552 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:00,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:00,553 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:29:00,553 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:01,156 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:01,156 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:01,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:01,165 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:29:01,185 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:29:01,186 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:29:01,190 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:01,513 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 6 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:01,534 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:01,535 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 25 [2018-10-04 12:29:01,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:29:01,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:29:01,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:29:01,536 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 26 states. [2018-10-04 12:29:02,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:02,522 INFO L93 Difference]: Finished difference Result 109 states and 114 transitions. [2018-10-04 12:29:02,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:29:02,523 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2018-10-04 12:29:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:02,524 INFO L225 Difference]: With dead ends: 109 [2018-10-04 12:29:02,524 INFO L226 Difference]: Without dead ends: 83 [2018-10-04 12:29:02,525 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=179, Invalid=1381, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:29:02,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2018-10-04 12:29:02,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2018-10-04 12:29:02,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 12:29:02,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2018-10-04 12:29:02,535 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2018-10-04 12:29:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:02,535 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2018-10-04 12:29:02,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:29:02,535 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2018-10-04 12:29:02,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 12:29:02,536 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:02,536 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-04 12:29:02,537 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:02,537 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:02,537 INFO L82 PathProgramCache]: Analyzing trace with hash 549587323, now seen corresponding path program 11 times [2018-10-04 12:29:02,537 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:02,537 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:02,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:02,538 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:29:02,538 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:02,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:02,705 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:02,705 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:02,712 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:29:02,794 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2018-10-04 12:29:02,794 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:29:02,797 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 105 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:03,127 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:03,127 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2018-10-04 12:29:03,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:29:03,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:29:03,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:29:03,128 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 26 states. [2018-10-04 12:29:03,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:03,659 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2018-10-04 12:29:03,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:29:03,659 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2018-10-04 12:29:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:03,660 INFO L225 Difference]: With dead ends: 120 [2018-10-04 12:29:03,661 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:29:03,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:29:03,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:29:03,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2018-10-04 12:29:03,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:29:03,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2018-10-04 12:29:03,671 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 55 [2018-10-04 12:29:03,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:03,672 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2018-10-04 12:29:03,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:29:03,672 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2018-10-04 12:29:03,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:29:03,673 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:03,673 INFO L375 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1] [2018-10-04 12:29:03,673 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:03,673 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:03,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1743111421, now seen corresponding path program 12 times [2018-10-04 12:29:03,674 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:03,674 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:03,674 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:03,675 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:29:03,675 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:03,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:04,038 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:04,038 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:04,046 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:29:04,065 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2018-10-04 12:29:04,065 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:29:04,069 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:04,418 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:04,418 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 28 [2018-10-04 12:29:04,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:29:04,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:29:04,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=738, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:29:04,420 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 29 states. [2018-10-04 12:29:06,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:06,240 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2018-10-04 12:29:06,248 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:29:06,248 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2018-10-04 12:29:06,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:06,249 INFO L225 Difference]: With dead ends: 124 [2018-10-04 12:29:06,249 INFO L226 Difference]: Without dead ends: 94 [2018-10-04 12:29:06,250 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:29:06,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2018-10-04 12:29:06,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2018-10-04 12:29:06,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:29:06,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2018-10-04 12:29:06,266 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 58 [2018-10-04 12:29:06,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:06,266 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2018-10-04 12:29:06,266 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:29:06,266 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2018-10-04 12:29:06,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:29:06,267 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:06,268 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-04 12:29:06,268 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:06,268 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:06,268 INFO L82 PathProgramCache]: Analyzing trace with hash -1415751510, now seen corresponding path program 13 times [2018-10-04 12:29:06,268 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:06,268 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:06,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:06,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:29:06,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:06,521 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:06,521 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:06,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:29:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:06,551 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:06,783 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:06,783 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2018-10-04 12:29:06,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:29:06,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:29:06,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=604, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:29:06,784 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 29 states. [2018-10-04 12:29:07,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:07,224 INFO L93 Difference]: Finished difference Result 135 states and 139 transitions. [2018-10-04 12:29:07,224 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:29:07,225 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2018-10-04 12:29:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:07,225 INFO L225 Difference]: With dead ends: 135 [2018-10-04 12:29:07,226 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 12:29:07,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:29:07,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 12:29:07,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2018-10-04 12:29:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 12:29:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2018-10-04 12:29:07,235 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 62 [2018-10-04 12:29:07,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:07,235 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2018-10-04 12:29:07,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:29:07,236 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2018-10-04 12:29:07,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 12:29:07,236 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:07,237 INFO L375 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1] [2018-10-04 12:29:07,237 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:07,237 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:07,237 INFO L82 PathProgramCache]: Analyzing trace with hash 175889954, now seen corresponding path program 14 times [2018-10-04 12:29:07,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:07,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:07,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:07,238 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:29:07,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 8 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:07,911 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:07,911 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:07,918 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:29:07,935 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:29:07,936 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:29:07,938 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 128 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:08,764 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:08,764 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 42 [2018-10-04 12:29:08,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:29:08,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:29:08,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:29:08,765 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand 43 states. [2018-10-04 12:29:09,876 WARN L178 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2018-10-04 12:29:11,452 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2018-10-04 12:29:11,999 WARN L178 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2018-10-04 12:29:12,930 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 20 [2018-10-04 12:29:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:13,771 INFO L93 Difference]: Finished difference Result 173 states and 179 transitions. [2018-10-04 12:29:13,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:29:13,772 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 65 [2018-10-04 12:29:13,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:13,773 INFO L225 Difference]: With dead ends: 173 [2018-10-04 12:29:13,773 INFO L226 Difference]: Without dead ends: 102 [2018-10-04 12:29:13,777 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1993 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=829, Invalid=8483, Unknown=0, NotChecked=0, Total=9312 [2018-10-04 12:29:13,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2018-10-04 12:29:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2018-10-04 12:29:13,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2018-10-04 12:29:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2018-10-04 12:29:13,788 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 65 [2018-10-04 12:29:13,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:13,788 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2018-10-04 12:29:13,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:29:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2018-10-04 12:29:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2018-10-04 12:29:13,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:13,789 INFO L375 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1] [2018-10-04 12:29:13,789 INFO L423 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:13,790 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:13,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2036938705, now seen corresponding path program 15 times [2018-10-04 12:29:13,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:13,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:13,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:13,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:29:13,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 9 proven. 307 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:14,230 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:14,230 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:14,237 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:29:14,256 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-04 12:29:14,256 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:29:14,258 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 162 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:15,241 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:15,241 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 46 [2018-10-04 12:29:15,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:29:15,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:29:15,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1902, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:29:15,243 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 47 states. [2018-10-04 12:29:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:19,475 INFO L93 Difference]: Finished difference Result 192 states and 198 transitions. [2018-10-04 12:29:19,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2018-10-04 12:29:19,475 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2018-10-04 12:29:19,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:19,477 INFO L225 Difference]: With dead ends: 192 [2018-10-04 12:29:19,477 INFO L226 Difference]: Without dead ends: 113 [2018-10-04 12:29:19,480 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2443 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=969, Invalid=10373, Unknown=0, NotChecked=0, Total=11342 [2018-10-04 12:29:19,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2018-10-04 12:29:19,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2018-10-04 12:29:19,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2018-10-04 12:29:19,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2018-10-04 12:29:19,490 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 72 [2018-10-04 12:29:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:19,490 INFO L480 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2018-10-04 12:29:19,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:29:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2018-10-04 12:29:19,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2018-10-04 12:29:19,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:19,491 INFO L375 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1] [2018-10-04 12:29:19,491 INFO L423 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:19,491 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:19,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1070649840, now seen corresponding path program 16 times [2018-10-04 12:29:19,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:19,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:19,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:19,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:29:19,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:20,702 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:20,702 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:20,702 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:20,713 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:29:20,729 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:29:20,730 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:29:20,732 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:21,098 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 10 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:21,119 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:21,119 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 37 [2018-10-04 12:29:21,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:29:21,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:29:21,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:29:21,120 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 38 states. [2018-10-04 12:29:23,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:23,633 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2018-10-04 12:29:23,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:29:23,634 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2018-10-04 12:29:23,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:23,636 INFO L225 Difference]: With dead ends: 169 [2018-10-04 12:29:23,636 INFO L226 Difference]: Without dead ends: 127 [2018-10-04 12:29:23,638 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=319, Invalid=3221, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:29:23,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2018-10-04 12:29:23,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 84. [2018-10-04 12:29:23,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2018-10-04 12:29:23,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2018-10-04 12:29:23,652 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 79 [2018-10-04 12:29:23,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:23,653 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2018-10-04 12:29:23,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:29:23,653 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2018-10-04 12:29:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2018-10-04 12:29:23,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:23,654 INFO L375 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-04 12:29:23,654 INFO L423 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:23,655 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:23,655 INFO L82 PathProgramCache]: Analyzing trace with hash -685461225, now seen corresponding path program 17 times [2018-10-04 12:29:23,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:23,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:23,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:23,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:29:23,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:24,001 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:24,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:24,008 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:29:24,030 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2018-10-04 12:29:24,030 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:29:24,032 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 253 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:24,345 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:24,346 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2018-10-04 12:29:24,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:29:24,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:29:24,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=1057, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:29:24,347 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand 38 states. [2018-10-04 12:29:24,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:24,843 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2018-10-04 12:29:24,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:29:24,844 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 83 [2018-10-04 12:29:24,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:24,845 INFO L225 Difference]: With dead ends: 180 [2018-10-04 12:29:24,845 INFO L226 Difference]: Without dead ends: 89 [2018-10-04 12:29:24,846 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=607, Invalid=1843, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:29:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2018-10-04 12:29:24,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2018-10-04 12:29:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2018-10-04 12:29:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2018-10-04 12:29:24,855 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 83 [2018-10-04 12:29:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:24,855 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2018-10-04 12:29:24,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:29:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2018-10-04 12:29:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2018-10-04 12:29:24,856 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:24,856 INFO L375 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1] [2018-10-04 12:29:24,856 INFO L423 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:24,856 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:24,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1750415713, now seen corresponding path program 18 times [2018-10-04 12:29:24,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:24,857 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:24,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:24,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:29:24,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:24,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:25,372 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:25,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:25,373 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:25,381 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:29:25,403 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:29:25,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:29:25,405 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 11 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:25,905 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:25,905 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 40 [2018-10-04 12:29:25,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:29:25,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:29:25,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1534, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:29:25,906 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 41 states. [2018-10-04 12:29:28,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:28,882 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2018-10-04 12:29:28,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:29:28,885 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2018-10-04 12:29:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:28,887 INFO L225 Difference]: With dead ends: 184 [2018-10-04 12:29:28,887 INFO L226 Difference]: Without dead ends: 138 [2018-10-04 12:29:28,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=359, Invalid=3801, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:29:28,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-04 12:29:28,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 91. [2018-10-04 12:29:28,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2018-10-04 12:29:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2018-10-04 12:29:28,902 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 86 [2018-10-04 12:29:28,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:28,902 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2018-10-04 12:29:28,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:29:28,902 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2018-10-04 12:29:28,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2018-10-04 12:29:28,903 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:28,903 INFO L375 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-04 12:29:28,903 INFO L423 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:28,904 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:28,904 INFO L82 PathProgramCache]: Analyzing trace with hash 310818374, now seen corresponding path program 19 times [2018-10-04 12:29:28,904 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:28,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:28,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:28,905 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:29:28,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:29,334 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:29,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:29,335 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:29,342 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:29:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:29,363 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:29,756 INFO L134 CoverageAnalysis]: Checked inductivity of 510 backedges. 300 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:29,777 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:29,777 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2018-10-04 12:29:29,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:29:29,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:29:29,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:29:29,778 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 41 states. [2018-10-04 12:29:30,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:30,353 INFO L93 Difference]: Finished difference Result 195 states and 199 transitions. [2018-10-04 12:29:30,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:29:30,355 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2018-10-04 12:29:30,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:30,356 INFO L225 Difference]: With dead ends: 195 [2018-10-04 12:29:30,356 INFO L226 Difference]: Without dead ends: 96 [2018-10-04 12:29:30,357 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=703, Invalid=2159, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:29:30,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2018-10-04 12:29:30,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2018-10-04 12:29:30,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2018-10-04 12:29:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2018-10-04 12:29:30,368 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 90 [2018-10-04 12:29:30,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:30,369 INFO L480 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2018-10-04 12:29:30,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:29:30,369 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2018-10-04 12:29:30,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-10-04 12:29:30,370 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:30,370 INFO L375 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1] [2018-10-04 12:29:30,370 INFO L423 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:30,370 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:30,370 INFO L82 PathProgramCache]: Analyzing trace with hash 2005850046, now seen corresponding path program 20 times [2018-10-04 12:29:30,370 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:30,371 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:30,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:30,371 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:29:30,371 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:30,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:30,967 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 12 proven. 535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:30,967 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:30,967 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:30,974 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:29:30,996 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:29:30,996 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:29:30,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:32,470 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 288 proven. 259 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:32,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:32,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30] total 58 [2018-10-04 12:29:32,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:29:32,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:29:32,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=3030, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:29:32,493 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand 59 states. [2018-10-04 12:29:38,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:38,844 INFO L93 Difference]: Finished difference Result 249 states and 255 transitions. [2018-10-04 12:29:38,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2018-10-04 12:29:38,844 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 93 [2018-10-04 12:29:38,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:38,845 INFO L225 Difference]: With dead ends: 249 [2018-10-04 12:29:38,845 INFO L226 Difference]: Without dead ends: 146 [2018-10-04 12:29:38,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4069 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1449, Invalid=17183, Unknown=0, NotChecked=0, Total=18632 [2018-10-04 12:29:38,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2018-10-04 12:29:38,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2018-10-04 12:29:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 12:29:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2018-10-04 12:29:38,863 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 93 [2018-10-04 12:29:38,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:38,864 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2018-10-04 12:29:38,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:29:38,864 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2018-10-04 12:29:38,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 12:29:38,865 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:38,865 INFO L375 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1] [2018-10-04 12:29:38,865 INFO L423 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:38,865 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:38,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1811736429, now seen corresponding path program 21 times [2018-10-04 12:29:38,865 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:38,866 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:38,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:38,866 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:29:38,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:38,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:39,754 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:39,755 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:39,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:29:39,790 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 12:29:39,790 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:29:39,792 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 13 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:40,538 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:40,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 46 [2018-10-04 12:29:40,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:29:40,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:29:40,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2040, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:29:40,540 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 47 states. [2018-10-04 12:29:43,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:43,932 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2018-10-04 12:29:43,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:29:43,932 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 100 [2018-10-04 12:29:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:43,934 INFO L225 Difference]: With dead ends: 214 [2018-10-04 12:29:43,934 INFO L226 Difference]: Without dead ends: 160 [2018-10-04 12:29:43,935 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=445, Invalid=5105, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 12:29:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2018-10-04 12:29:43,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 105. [2018-10-04 12:29:43,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2018-10-04 12:29:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2018-10-04 12:29:43,950 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 100 [2018-10-04 12:29:43,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:43,951 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2018-10-04 12:29:43,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:29:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2018-10-04 12:29:43,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2018-10-04 12:29:43,951 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:43,951 INFO L375 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-04 12:29:43,952 INFO L423 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:43,952 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:43,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1008713748, now seen corresponding path program 22 times [2018-10-04 12:29:43,952 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:43,952 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:43,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:43,953 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:29:43,953 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:44,377 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:44,377 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:44,377 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:44,384 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:29:44,401 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:29:44,401 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:29:44,403 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 406 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:44,854 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:44,854 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2018-10-04 12:29:44,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:29:44,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:29:44,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=526, Invalid=1636, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:29:44,856 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 47 states. [2018-10-04 12:29:45,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:45,622 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2018-10-04 12:29:45,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:29:45,622 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 104 [2018-10-04 12:29:45,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:45,623 INFO L225 Difference]: With dead ends: 225 [2018-10-04 12:29:45,623 INFO L226 Difference]: Without dead ends: 110 [2018-10-04 12:29:45,624 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=916, Invalid=2866, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:29:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2018-10-04 12:29:45,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2018-10-04 12:29:45,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2018-10-04 12:29:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2018-10-04 12:29:45,641 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2018-10-04 12:29:45,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:45,641 INFO L480 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2018-10-04 12:29:45,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:29:45,641 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2018-10-04 12:29:45,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2018-10-04 12:29:45,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:45,642 INFO L375 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1] [2018-10-04 12:29:45,642 INFO L423 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:45,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:45,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1699483764, now seen corresponding path program 23 times [2018-10-04 12:29:45,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:45,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:45,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:45,643 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:29:45,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:46,647 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:46,647 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:46,647 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:46,655 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:29:46,686 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 12:29:46,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:29:46,688 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 14 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:47,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:47,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 49 [2018-10-04 12:29:47,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:29:47,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:29:47,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2320, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:29:47,656 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand 50 states. [2018-10-04 12:29:51,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:51,549 INFO L93 Difference]: Finished difference Result 229 states and 234 transitions. [2018-10-04 12:29:51,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:29:51,556 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 107 [2018-10-04 12:29:51,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:51,557 INFO L225 Difference]: With dead ends: 229 [2018-10-04 12:29:51,557 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 12:29:51,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=491, Invalid=5829, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:29:51,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 12:29:51,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 112. [2018-10-04 12:29:51,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2018-10-04 12:29:51,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2018-10-04 12:29:51,581 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2018-10-04 12:29:51,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:51,581 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2018-10-04 12:29:51,582 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:29:51,582 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2018-10-04 12:29:51,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2018-10-04 12:29:51,582 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:51,582 INFO L375 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-04 12:29:51,583 INFO L423 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:51,583 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:51,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1446534989, now seen corresponding path program 24 times [2018-10-04 12:29:51,583 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:51,583 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:51,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:51,585 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:29:51,585 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:52,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:52,063 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:52,075 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:29:52,106 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 12:29:52,106 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:29:52,109 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 795 backedges. 465 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:52,727 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:52,727 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2018-10-04 12:29:52,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:29:52,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:29:52,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=1857, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:29:52,728 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand 50 states. [2018-10-04 12:29:54,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:29:54,239 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2018-10-04 12:29:54,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:29:54,239 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 111 [2018-10-04 12:29:54,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:29:54,240 INFO L225 Difference]: With dead ends: 240 [2018-10-04 12:29:54,240 INFO L226 Difference]: Without dead ends: 117 [2018-10-04 12:29:54,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1033, Invalid=3257, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:29:54,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2018-10-04 12:29:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 115. [2018-10-04 12:29:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2018-10-04 12:29:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2018-10-04 12:29:54,256 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 111 [2018-10-04 12:29:54,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:29:54,257 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2018-10-04 12:29:54,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:29:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2018-10-04 12:29:54,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2018-10-04 12:29:54,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:29:54,257 INFO L375 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1] [2018-10-04 12:29:54,258 INFO L423 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:29:54,258 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:29:54,258 INFO L82 PathProgramCache]: Analyzing trace with hash -2055366085, now seen corresponding path program 25 times [2018-10-04 12:29:54,258 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:29:54,258 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:29:54,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:54,259 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:29:54,259 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:29:54,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:55,035 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:29:55,036 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:29:55,045 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:29:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:29:55,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:29:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 15 proven. 826 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:29:55,943 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:29:55,943 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 52 [2018-10-04 12:29:55,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:29:55,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:29:55,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2618, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:29:55,944 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 53 states. [2018-10-04 12:30:00,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:00,351 INFO L93 Difference]: Finished difference Result 244 states and 249 transitions. [2018-10-04 12:30:00,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:30:00,352 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2018-10-04 12:30:00,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:00,353 INFO L225 Difference]: With dead ends: 244 [2018-10-04 12:30:00,353 INFO L226 Difference]: Without dead ends: 182 [2018-10-04 12:30:00,354 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=539, Invalid=6601, Unknown=0, NotChecked=0, Total=7140 [2018-10-04 12:30:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2018-10-04 12:30:00,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 119. [2018-10-04 12:30:00,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2018-10-04 12:30:00,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2018-10-04 12:30:00,376 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2018-10-04 12:30:00,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:00,377 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2018-10-04 12:30:00,377 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:30:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2018-10-04 12:30:00,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2018-10-04 12:30:00,377 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:00,377 INFO L375 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-04 12:30:00,378 INFO L423 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:00,378 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:00,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1833851874, now seen corresponding path program 26 times [2018-10-04 12:30:00,378 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:00,378 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:00,378 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:00,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:00,379 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:00,973 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:00,973 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:30:00,989 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:30:01,014 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:30:01,014 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:01,018 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 904 backedges. 528 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:01,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:01,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2018-10-04 12:30:01,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:30:01,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:30:01,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=664, Invalid=2092, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:30:01,533 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 53 states. [2018-10-04 12:30:02,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:02,763 INFO L93 Difference]: Finished difference Result 255 states and 259 transitions. [2018-10-04 12:30:02,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:30:02,763 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 118 [2018-10-04 12:30:02,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:02,764 INFO L225 Difference]: With dead ends: 255 [2018-10-04 12:30:02,764 INFO L226 Difference]: Without dead ends: 124 [2018-10-04 12:30:02,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1157, Invalid=3673, Unknown=0, NotChecked=0, Total=4830 [2018-10-04 12:30:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2018-10-04 12:30:02,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2018-10-04 12:30:02,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2018-10-04 12:30:02,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 124 transitions. [2018-10-04 12:30:02,784 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 124 transitions. Word has length 118 [2018-10-04 12:30:02,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:02,784 INFO L480 AbstractCegarLoop]: Abstraction has 122 states and 124 transitions. [2018-10-04 12:30:02,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:30:02,784 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 124 transitions. [2018-10-04 12:30:02,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2018-10-04 12:30:02,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:02,785 INFO L375 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1] [2018-10-04 12:30:02,785 INFO L423 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:02,785 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:02,786 INFO L82 PathProgramCache]: Analyzing trace with hash 540940634, now seen corresponding path program 27 times [2018-10-04 12:30:02,786 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:02,786 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:02,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:02,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:02,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 16 proven. 937 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:03,842 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:03,842 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:30:03,850 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:30:03,882 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 12:30:03,882 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:03,884 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:05,847 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 512 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:05,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:05,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38] total 74 [2018-10-04 12:30:05,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2018-10-04 12:30:05,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2018-10-04 12:30:05,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=4940, Unknown=0, NotChecked=0, Total=5550 [2018-10-04 12:30:05,870 INFO L87 Difference]: Start difference. First operand 122 states and 124 transitions. Second operand 75 states. [2018-10-04 12:30:15,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:15,899 INFO L93 Difference]: Finished difference Result 325 states and 331 transitions. [2018-10-04 12:30:15,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2018-10-04 12:30:15,905 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 121 [2018-10-04 12:30:15,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:15,906 INFO L225 Difference]: With dead ends: 325 [2018-10-04 12:30:15,906 INFO L226 Difference]: Without dead ends: 190 [2018-10-04 12:30:15,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6881 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=2229, Invalid=28923, Unknown=0, NotChecked=0, Total=31152 [2018-10-04 12:30:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2018-10-04 12:30:15,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2018-10-04 12:30:15,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2018-10-04 12:30:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 131 transitions. [2018-10-04 12:30:15,933 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 131 transitions. Word has length 121 [2018-10-04 12:30:15,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:15,933 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 131 transitions. [2018-10-04 12:30:15,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has 75 states. [2018-10-04 12:30:15,933 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 131 transitions. [2018-10-04 12:30:15,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2018-10-04 12:30:15,934 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:15,934 INFO L375 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1] [2018-10-04 12:30:15,934 INFO L423 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:15,935 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:15,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1991581943, now seen corresponding path program 28 times [2018-10-04 12:30:15,935 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:15,935 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:15,935 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:15,936 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:15,936 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:16,981 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:16,981 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:30:16,990 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:30:17,010 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:30:17,011 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:17,013 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 17 proven. 1055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:18,187 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:18,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 58 [2018-10-04 12:30:18,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:30:18,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:30:18,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:30:18,189 INFO L87 Difference]: Start difference. First operand 129 states and 131 transitions. Second operand 59 states. [2018-10-04 12:30:23,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:23,947 INFO L93 Difference]: Finished difference Result 274 states and 279 transitions. [2018-10-04 12:30:23,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2018-10-04 12:30:23,947 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 128 [2018-10-04 12:30:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:23,949 INFO L225 Difference]: With dead ends: 274 [2018-10-04 12:30:23,949 INFO L226 Difference]: Without dead ends: 204 [2018-10-04 12:30:23,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=641, Invalid=8289, Unknown=0, NotChecked=0, Total=8930 [2018-10-04 12:30:23,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2018-10-04 12:30:23,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2018-10-04 12:30:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2018-10-04 12:30:23,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2018-10-04 12:30:23,980 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 128 [2018-10-04 12:30:23,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:23,980 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2018-10-04 12:30:23,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:30:23,980 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2018-10-04 12:30:23,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2018-10-04 12:30:23,981 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:23,981 INFO L375 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-04 12:30:23,982 INFO L423 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:23,982 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:23,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1942976080, now seen corresponding path program 29 times [2018-10-04 12:30:23,982 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:23,982 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:23,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:23,983 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:23,983 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:25,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:25,322 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:25,322 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:30:25,330 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:30:25,361 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 12:30:25,361 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:25,365 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1143 backedges. 666 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:26,055 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:26,055 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2018-10-04 12:30:26,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:30:26,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:30:26,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=818, Invalid=2604, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:30:26,057 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand 59 states. [2018-10-04 12:30:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:27,115 INFO L93 Difference]: Finished difference Result 285 states and 289 transitions. [2018-10-04 12:30:27,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:30:27,116 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 132 [2018-10-04 12:30:27,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:27,118 INFO L225 Difference]: With dead ends: 285 [2018-10-04 12:30:27,118 INFO L226 Difference]: Without dead ends: 138 [2018-10-04 12:30:27,119 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1426, Invalid=4580, Unknown=0, NotChecked=0, Total=6006 [2018-10-04 12:30:27,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2018-10-04 12:30:27,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2018-10-04 12:30:27,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2018-10-04 12:30:27,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2018-10-04 12:30:27,147 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 132 [2018-10-04 12:30:27,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:27,147 INFO L480 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2018-10-04 12:30:27,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:30:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2018-10-04 12:30:27,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2018-10-04 12:30:27,148 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:27,148 INFO L375 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1] [2018-10-04 12:30:27,148 INFO L423 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:27,148 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:27,148 INFO L82 PathProgramCache]: Analyzing trace with hash 220943656, now seen corresponding path program 30 times [2018-10-04 12:30:27,149 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:27,149 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:27,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:27,149 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:27,150 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 18 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:28,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:28,539 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:30:28,547 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:30:28,610 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-10-04 12:30:28,611 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:28,614 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:31,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 648 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:31,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:31,431 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 82 [2018-10-04 12:30:31,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 12:30:31,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 12:30:31,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=737, Invalid=6069, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 12:30:31,433 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand 83 states. [2018-10-04 12:30:40,447 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-10-04 12:30:40,687 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-10-04 12:30:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:42,863 INFO L93 Difference]: Finished difference Result 363 states and 369 transitions. [2018-10-04 12:30:42,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2018-10-04 12:30:42,863 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 135 [2018-10-04 12:30:42,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:42,864 INFO L225 Difference]: With dead ends: 363 [2018-10-04 12:30:42,864 INFO L226 Difference]: Without dead ends: 212 [2018-10-04 12:30:42,866 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8563 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=2679, Invalid=35933, Unknown=0, NotChecked=0, Total=38612 [2018-10-04 12:30:42,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2018-10-04 12:30:42,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 143. [2018-10-04 12:30:42,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2018-10-04 12:30:42,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2018-10-04 12:30:42,893 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 135 [2018-10-04 12:30:42,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:42,894 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2018-10-04 12:30:42,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 12:30:42,894 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2018-10-04 12:30:42,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2018-10-04 12:30:42,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:42,895 INFO L375 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1] [2018-10-04 12:30:42,895 INFO L423 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:42,895 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:42,895 INFO L82 PathProgramCache]: Analyzing trace with hash 847427031, now seen corresponding path program 31 times [2018-10-04 12:30:42,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:42,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:42,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:42,896 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:42,896 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:42,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:45,144 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:45,144 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:30:45,152 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:45,181 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 19 proven. 1312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:47,360 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:47,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 64 [2018-10-04 12:30:47,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:30:47,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:30:47,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3990, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:30:47,361 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 65 states. [2018-10-04 12:30:52,470 WARN L178 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-10-04 12:30:52,746 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-10-04 12:30:53,007 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2018-10-04 12:30:53,522 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 84 [2018-10-04 12:30:53,733 WARN L178 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2018-10-04 12:30:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:54,970 INFO L93 Difference]: Finished difference Result 304 states and 309 transitions. [2018-10-04 12:30:54,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2018-10-04 12:30:54,970 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 142 [2018-10-04 12:30:54,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:54,972 INFO L225 Difference]: With dead ends: 304 [2018-10-04 12:30:54,972 INFO L226 Difference]: Without dead ends: 226 [2018-10-04 12:30:54,972 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=751, Invalid=10169, Unknown=0, NotChecked=0, Total=10920 [2018-10-04 12:30:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2018-10-04 12:30:54,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 147. [2018-10-04 12:30:54,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2018-10-04 12:30:54,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2018-10-04 12:30:54,998 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 142 [2018-10-04 12:30:54,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:54,998 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2018-10-04 12:30:54,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:30:54,998 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2018-10-04 12:30:54,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2018-10-04 12:30:54,999 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:54,999 INFO L375 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-04 12:30:54,999 INFO L423 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:54,999 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:54,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1796978306, now seen corresponding path program 32 times [2018-10-04 12:30:55,000 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:55,000 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:55,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:55,000 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:30:55,000 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:56,165 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:56,165 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:30:56,175 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:30:56,206 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:30:56,206 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:56,209 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:30:57,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1410 backedges. 820 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:57,135 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:30:57,135 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2018-10-04 12:30:57,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:30:57,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:30:57,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=988, Invalid=3172, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:30:57,136 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 65 states. [2018-10-04 12:30:58,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:30:58,458 INFO L93 Difference]: Finished difference Result 315 states and 319 transitions. [2018-10-04 12:30:58,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:30:58,458 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 146 [2018-10-04 12:30:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:30:58,459 INFO L225 Difference]: With dead ends: 315 [2018-10-04 12:30:58,460 INFO L226 Difference]: Without dead ends: 152 [2018-10-04 12:30:58,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1723, Invalid=5587, Unknown=0, NotChecked=0, Total=7310 [2018-10-04 12:30:58,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2018-10-04 12:30:58,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2018-10-04 12:30:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2018-10-04 12:30:58,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2018-10-04 12:30:58,504 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 146 [2018-10-04 12:30:58,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:30:58,505 INFO L480 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2018-10-04 12:30:58,505 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:30:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2018-10-04 12:30:58,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2018-10-04 12:30:58,506 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:30:58,506 INFO L375 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1] [2018-10-04 12:30:58,506 INFO L423 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:30:58,506 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:30:58,506 INFO L82 PathProgramCache]: Analyzing trace with hash -193355018, now seen corresponding path program 33 times [2018-10-04 12:30:58,507 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:30:58,507 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:30:58,507 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:58,508 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:30:58,508 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:30:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:30:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 20 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:30:59,751 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:30:59,751 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:30:59,758 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:30:59,820 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2018-10-04 12:30:59,820 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:30:59,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 800 proven. 671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:02,660 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:02,660 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46] total 90 [2018-10-04 12:31:02,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2018-10-04 12:31:02,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2018-10-04 12:31:02,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=876, Invalid=7314, Unknown=0, NotChecked=0, Total=8190 [2018-10-04 12:31:02,661 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 91 states. [2018-10-04 12:31:13,372 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-10-04 12:31:13,648 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-10-04 12:31:13,919 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2018-10-04 12:31:14,222 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-04 12:31:16,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:16,574 INFO L93 Difference]: Finished difference Result 401 states and 407 transitions. [2018-10-04 12:31:16,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2018-10-04 12:31:16,574 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 149 [2018-10-04 12:31:16,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:16,575 INFO L225 Difference]: With dead ends: 401 [2018-10-04 12:31:16,575 INFO L226 Difference]: Without dead ends: 234 [2018-10-04 12:31:16,577 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10429 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=3169, Invalid=43703, Unknown=0, NotChecked=0, Total=46872 [2018-10-04 12:31:16,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2018-10-04 12:31:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 157. [2018-10-04 12:31:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2018-10-04 12:31:16,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2018-10-04 12:31:16,614 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 149 [2018-10-04 12:31:16,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:16,615 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2018-10-04 12:31:16,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has 91 states. [2018-10-04 12:31:16,615 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2018-10-04 12:31:16,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2018-10-04 12:31:16,616 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:16,616 INFO L375 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1] [2018-10-04 12:31:16,616 INFO L423 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:16,616 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:16,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1380130469, now seen corresponding path program 34 times [2018-10-04 12:31:16,617 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:16,617 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:16,617 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:16,617 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:16,618 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:18,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:18,293 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:18,293 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:18,301 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:31:18,329 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:31:18,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:18,332 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:19,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 21 proven. 1597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:19,872 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:19,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 70 [2018-10-04 12:31:19,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:31:19,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:31:19,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=4784, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:31:19,874 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand 71 states. [2018-10-04 12:31:25,021 WARN L178 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-10-04 12:31:25,333 WARN L178 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-10-04 12:31:25,620 WARN L178 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2018-10-04 12:31:25,816 WARN L178 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-04 12:31:26,005 WARN L178 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-04 12:31:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:27,990 INFO L93 Difference]: Finished difference Result 334 states and 339 transitions. [2018-10-04 12:31:27,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2018-10-04 12:31:27,991 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 156 [2018-10-04 12:31:27,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:27,993 INFO L225 Difference]: With dead ends: 334 [2018-10-04 12:31:27,993 INFO L226 Difference]: Without dead ends: 248 [2018-10-04 12:31:27,994 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=869, Invalid=12241, Unknown=0, NotChecked=0, Total=13110 [2018-10-04 12:31:27,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2018-10-04 12:31:28,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 161. [2018-10-04 12:31:28,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2018-10-04 12:31:28,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2018-10-04 12:31:28,025 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 156 [2018-10-04 12:31:28,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:28,026 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2018-10-04 12:31:28,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:31:28,026 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2018-10-04 12:31:28,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2018-10-04 12:31:28,027 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:28,027 INFO L375 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-04 12:31:28,027 INFO L423 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:28,027 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:28,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1719166132, now seen corresponding path program 35 times [2018-10-04 12:31:28,028 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:28,028 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:28,028 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:28,029 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:28,029 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:28,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:28,820 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:28,820 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:28,829 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:31:28,876 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2018-10-04 12:31:28,876 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:28,879 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 990 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:30,075 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:30,075 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2018-10-04 12:31:30,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2018-10-04 12:31:30,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2018-10-04 12:31:30,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1174, Invalid=3796, Unknown=0, NotChecked=0, Total=4970 [2018-10-04 12:31:30,076 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand 71 states. [2018-10-04 12:31:31,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:31,664 INFO L93 Difference]: Finished difference Result 345 states and 349 transitions. [2018-10-04 12:31:31,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:31:31,665 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 160 [2018-10-04 12:31:31,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:31,666 INFO L225 Difference]: With dead ends: 345 [2018-10-04 12:31:31,666 INFO L226 Difference]: Without dead ends: 166 [2018-10-04 12:31:31,667 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2048, Invalid=6694, Unknown=0, NotChecked=0, Total=8742 [2018-10-04 12:31:31,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2018-10-04 12:31:31,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2018-10-04 12:31:31,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2018-10-04 12:31:31,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 166 transitions. [2018-10-04 12:31:31,706 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 166 transitions. Word has length 160 [2018-10-04 12:31:31,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:31,706 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 166 transitions. [2018-10-04 12:31:31,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has 71 states. [2018-10-04 12:31:31,707 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 166 transitions. [2018-10-04 12:31:31,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2018-10-04 12:31:31,707 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:31,708 INFO L375 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1] [2018-10-04 12:31:31,708 INFO L423 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:31,708 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:31,708 INFO L82 PathProgramCache]: Analyzing trace with hash -148438332, now seen corresponding path program 36 times [2018-10-04 12:31:31,708 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:31,708 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:31,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:31,709 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:31,709 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:33,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:33,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:33,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:33,519 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:31:33,573 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2018-10-04 12:31:33,573 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:33,576 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 22 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:35,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:35,224 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48] total 73 [2018-10-04 12:31:35,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:31:35,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:31:35,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=5208, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:31:35,225 INFO L87 Difference]: Start difference. First operand 164 states and 166 transitions. Second operand 74 states. [2018-10-04 12:31:41,837 WARN L178 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-10-04 12:31:42,179 WARN L178 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-10-04 12:31:42,497 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2018-10-04 12:31:42,711 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-04 12:31:42,918 WARN L178 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-04 12:31:43,117 WARN L178 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-04 12:31:45,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:45,306 INFO L93 Difference]: Finished difference Result 349 states and 354 transitions. [2018-10-04 12:31:45,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2018-10-04 12:31:45,306 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 163 [2018-10-04 12:31:45,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:45,309 INFO L225 Difference]: With dead ends: 349 [2018-10-04 12:31:45,309 INFO L226 Difference]: Without dead ends: 259 [2018-10-04 12:31:45,310 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=931, Invalid=13349, Unknown=0, NotChecked=0, Total=14280 [2018-10-04 12:31:45,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2018-10-04 12:31:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 168. [2018-10-04 12:31:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2018-10-04 12:31:45,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2018-10-04 12:31:45,340 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 163 [2018-10-04 12:31:45,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:45,340 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2018-10-04 12:31:45,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:31:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2018-10-04 12:31:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2018-10-04 12:31:45,341 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:45,341 INFO L375 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-04 12:31:45,341 INFO L423 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:45,341 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:45,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1550952469, now seen corresponding path program 37 times [2018-10-04 12:31:45,341 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:45,341 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:45,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:45,342 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:31:45,342 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:46,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:46,654 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:46,654 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:46,662 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:46,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1863 backedges. 1081 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:47,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:47,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2018-10-04 12:31:47,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2018-10-04 12:31:47,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2018-10-04 12:31:47,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1273, Invalid=4129, Unknown=0, NotChecked=0, Total=5402 [2018-10-04 12:31:47,792 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 74 states. [2018-10-04 12:31:49,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:31:49,520 INFO L93 Difference]: Finished difference Result 360 states and 364 transitions. [2018-10-04 12:31:49,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:31:49,520 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 167 [2018-10-04 12:31:49,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:31:49,521 INFO L225 Difference]: With dead ends: 360 [2018-10-04 12:31:49,521 INFO L226 Difference]: Without dead ends: 173 [2018-10-04 12:31:49,522 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1886 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2221, Invalid=7285, Unknown=0, NotChecked=0, Total=9506 [2018-10-04 12:31:49,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2018-10-04 12:31:49,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2018-10-04 12:31:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2018-10-04 12:31:49,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2018-10-04 12:31:49,559 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 167 [2018-10-04 12:31:49,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:31:49,559 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2018-10-04 12:31:49,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 74 states. [2018-10-04 12:31:49,559 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2018-10-04 12:31:49,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2018-10-04 12:31:49,560 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:31:49,560 INFO L375 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1] [2018-10-04 12:31:49,560 INFO L423 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:31:49,560 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:31:49,561 INFO L82 PathProgramCache]: Analyzing trace with hash -810935949, now seen corresponding path program 38 times [2018-10-04 12:31:49,561 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:31:49,561 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:31:49,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:49,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:31:49,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:31:49,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:31:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:51,362 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:31:51,362 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:31:51,369 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:31:51,405 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:31:51,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:31:51,408 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:31:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 23 proven. 1910 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:31:53,021 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:31:53,021 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 76 [2018-10-04 12:31:53,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:31:53,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:31:53,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=5650, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 12:31:53,022 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 77 states. [2018-10-04 12:31:59,505 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-10-04 12:31:59,860 WARN L178 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-10-04 12:32:00,252 WARN L178 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2018-10-04 12:32:00,488 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-10-04 12:32:00,703 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-04 12:32:00,928 WARN L178 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-04 12:32:01,151 WARN L178 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-04 12:32:03,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:03,250 INFO L93 Difference]: Finished difference Result 364 states and 369 transitions. [2018-10-04 12:32:03,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2018-10-04 12:32:03,250 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 170 [2018-10-04 12:32:03,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:03,252 INFO L225 Difference]: With dead ends: 364 [2018-10-04 12:32:03,252 INFO L226 Difference]: Without dead ends: 270 [2018-10-04 12:32:03,253 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2405 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=995, Invalid=14505, Unknown=0, NotChecked=0, Total=15500 [2018-10-04 12:32:03,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2018-10-04 12:32:03,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 175. [2018-10-04 12:32:03,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2018-10-04 12:32:03,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2018-10-04 12:32:03,287 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 170 [2018-10-04 12:32:03,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:03,287 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2018-10-04 12:32:03,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:32:03,288 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2018-10-04 12:32:03,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2018-10-04 12:32:03,288 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:03,288 INFO L375 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-04 12:32:03,289 INFO L423 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:03,289 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:03,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1036484838, now seen corresponding path program 39 times [2018-10-04 12:32:03,289 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:03,289 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:03,289 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:03,290 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:03,290 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:05,490 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:05,490 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:05,498 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:32:05,545 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2018-10-04 12:32:05,545 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:05,548 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:06,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 1176 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:06,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:06,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2018-10-04 12:32:06,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2018-10-04 12:32:06,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2018-10-04 12:32:06,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1376, Invalid=4476, Unknown=0, NotChecked=0, Total=5852 [2018-10-04 12:32:06,699 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 77 states. [2018-10-04 12:32:08,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:08,527 INFO L93 Difference]: Finished difference Result 375 states and 379 transitions. [2018-10-04 12:32:08,527 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:32:08,527 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 174 [2018-10-04 12:32:08,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:08,529 INFO L225 Difference]: With dead ends: 375 [2018-10-04 12:32:08,529 INFO L226 Difference]: Without dead ends: 180 [2018-10-04 12:32:08,530 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2052 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2401, Invalid=7901, Unknown=0, NotChecked=0, Total=10302 [2018-10-04 12:32:08,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2018-10-04 12:32:08,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 178. [2018-10-04 12:32:08,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2018-10-04 12:32:08,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 180 transitions. [2018-10-04 12:32:08,564 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 180 transitions. Word has length 174 [2018-10-04 12:32:08,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:08,564 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 180 transitions. [2018-10-04 12:32:08,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has 77 states. [2018-10-04 12:32:08,564 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 180 transitions. [2018-10-04 12:32:08,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-10-04 12:32:08,565 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:08,565 INFO L375 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1] [2018-10-04 12:32:08,565 INFO L423 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:08,565 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:08,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1003391854, now seen corresponding path program 40 times [2018-10-04 12:32:08,565 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:08,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:08,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:08,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:08,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:10,777 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:10,777 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:10,787 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:32:10,819 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:32:10,819 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:10,823 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:12,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 24 proven. 2077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:12,493 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:12,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 79 [2018-10-04 12:32:12,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:32:12,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:32:12,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6110, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:32:12,495 INFO L87 Difference]: Start difference. First operand 178 states and 180 transitions. Second operand 80 states. [2018-10-04 12:32:19,486 WARN L178 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-10-04 12:32:19,859 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-10-04 12:32:20,220 WARN L178 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2018-10-04 12:32:20,466 WARN L178 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-10-04 12:32:20,748 WARN L178 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-10-04 12:32:21,000 WARN L178 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-04 12:32:21,217 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-04 12:32:21,423 WARN L178 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-04 12:32:21,619 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-10-04 12:32:23,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:23,589 INFO L93 Difference]: Finished difference Result 379 states and 384 transitions. [2018-10-04 12:32:23,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 12:32:23,589 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 177 [2018-10-04 12:32:23,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:23,590 INFO L225 Difference]: With dead ends: 379 [2018-10-04 12:32:23,591 INFO L226 Difference]: Without dead ends: 281 [2018-10-04 12:32:23,592 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2605 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1061, Invalid=15709, Unknown=0, NotChecked=0, Total=16770 [2018-10-04 12:32:23,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2018-10-04 12:32:23,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 182. [2018-10-04 12:32:23,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2018-10-04 12:32:23,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2018-10-04 12:32:23,641 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 177 [2018-10-04 12:32:23,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:23,642 INFO L480 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2018-10-04 12:32:23,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:32:23,642 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2018-10-04 12:32:23,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-10-04 12:32:23,643 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:23,643 INFO L375 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-04 12:32:23,643 INFO L423 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:23,643 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:23,644 INFO L82 PathProgramCache]: Analyzing trace with hash 525284025, now seen corresponding path program 41 times [2018-10-04 12:32:23,644 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:23,644 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:23,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:23,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:23,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:26,642 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:26,643 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:26,650 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:32:26,694 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2018-10-04 12:32:26,695 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:26,697 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:27,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2200 backedges. 1275 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:27,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:27,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2018-10-04 12:32:27,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2018-10-04 12:32:27,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2018-10-04 12:32:27,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4837, Unknown=0, NotChecked=0, Total=6320 [2018-10-04 12:32:27,831 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 80 states. [2018-10-04 12:32:29,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:29,818 INFO L93 Difference]: Finished difference Result 390 states and 394 transitions. [2018-10-04 12:32:29,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:32:29,819 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 181 [2018-10-04 12:32:29,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:29,821 INFO L225 Difference]: With dead ends: 390 [2018-10-04 12:32:29,821 INFO L226 Difference]: Without dead ends: 187 [2018-10-04 12:32:29,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2225 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2588, Invalid=8542, Unknown=0, NotChecked=0, Total=11130 [2018-10-04 12:32:29,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2018-10-04 12:32:29,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2018-10-04 12:32:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2018-10-04 12:32:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2018-10-04 12:32:29,872 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 181 [2018-10-04 12:32:29,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:29,873 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2018-10-04 12:32:29,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 80 states. [2018-10-04 12:32:29,873 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2018-10-04 12:32:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2018-10-04 12:32:29,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:29,874 INFO L375 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1] [2018-10-04 12:32:29,874 INFO L423 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:29,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:29,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1479170495, now seen corresponding path program 42 times [2018-10-04 12:32:29,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:29,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:29,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:29,875 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:29,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:29,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:32,436 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:32,436 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:32,443 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:32:32,500 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2018-10-04 12:32:32,500 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:32:32,504 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 25 proven. 2251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:34,415 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:34,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54] total 82 [2018-10-04 12:32:34,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 12:32:34,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 12:32:34,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=6588, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 12:32:34,417 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand 83 states. [2018-10-04 12:32:41,729 WARN L178 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-10-04 12:32:42,110 WARN L178 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2018-10-04 12:32:42,494 WARN L178 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2018-10-04 12:32:42,755 WARN L178 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2018-10-04 12:32:42,999 WARN L178 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 119 [2018-10-04 12:32:43,239 WARN L178 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2018-10-04 12:32:43,463 WARN L178 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2018-10-04 12:32:43,676 WARN L178 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 104 [2018-10-04 12:32:43,900 WARN L178 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 99 [2018-10-04 12:32:44,114 WARN L178 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2018-10-04 12:32:46,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:32:46,196 INFO L93 Difference]: Finished difference Result 394 states and 399 transitions. [2018-10-04 12:32:46,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2018-10-04 12:32:46,197 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 184 [2018-10-04 12:32:46,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:32:46,199 INFO L225 Difference]: With dead ends: 394 [2018-10-04 12:32:46,199 INFO L226 Difference]: Without dead ends: 292 [2018-10-04 12:32:46,200 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2813 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1129, Invalid=16961, Unknown=0, NotChecked=0, Total=18090 [2018-10-04 12:32:46,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2018-10-04 12:32:46,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 189. [2018-10-04 12:32:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2018-10-04 12:32:46,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 191 transitions. [2018-10-04 12:32:46,238 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 191 transitions. Word has length 184 [2018-10-04 12:32:46,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:32:46,238 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 191 transitions. [2018-10-04 12:32:46,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has 83 states. [2018-10-04 12:32:46,238 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 191 transitions. [2018-10-04 12:32:46,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2018-10-04 12:32:46,239 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:32:46,239 INFO L375 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1] [2018-10-04 12:32:46,239 INFO L423 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:32:46,239 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:32:46,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1293219048, now seen corresponding path program 43 times [2018-10-04 12:32:46,240 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:32:46,240 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:32:46,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:46,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:32:46,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:32:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:48,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:48,062 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:32:48,062 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:32:48,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:32:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:32:48,108 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:32:49,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2379 backedges. 1378 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:32:49,312 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:32:49,312 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2018-10-04 12:32:49,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2018-10-04 12:32:49,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2018-10-04 12:32:49,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1594, Invalid=5212, Unknown=0, NotChecked=0, Total=6806 [2018-10-04 12:32:49,314 INFO L87 Difference]: Start difference. First operand 189 states and 191 transitions. Second operand 83 states. Received shutdown request... [2018-10-04 12:32:49,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:32:49,738 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:32:49,743 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:32:49,744 INFO L202 PluginConnector]: Adding new model ArrayInit02.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:32:49 BoogieIcfgContainer [2018-10-04 12:32:49,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:32:49,745 INFO L168 Benchmark]: Toolchain (without parser) took 243861.73 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -104.3 MB). Free memory was 1.5 GB in the beginning and 1.1 GB in the end (delta: 404.6 MB). Peak memory consumption was 300.3 MB. Max. memory is 7.1 GB. [2018-10-04 12:32:49,746 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 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. [2018-10-04 12:32:49,746 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.82 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. [2018-10-04 12:32:49,746 INFO L168 Benchmark]: Boogie Preprocessor took 23.29 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. [2018-10-04 12:32:49,747 INFO L168 Benchmark]: RCFGBuilder took 352.16 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. [2018-10-04 12:32:49,747 INFO L168 Benchmark]: TraceAbstraction took 243439.82 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -104.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 383.5 MB). Peak memory consumption was 279.2 MB. Max. memory is 7.1 GB. [2018-10-04 12:32:49,749 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 0.20 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 41.82 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 23.29 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 352.16 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 243439.82 ms. Allocated memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: -104.3 MB). Free memory was 1.4 GB in the beginning and 1.1 GB in the end (delta: 383.5 MB). Peak memory consumption was 279.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 34]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 34). Cancelled while BasicCegarLoop was constructing difference of abstraction (189states) and FLOYD_HOARE automaton (currently 33 states, 83 states before enhancement), while ReachableStatesComputation was computing reachable states (109 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. TIMEOUT Result, 243.3s OverallTime, 47 OverallIterations, 27 TraceHistogramMax, 159.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 824 SDtfs, 4007 SDslu, 22172 SDs, 0 SdLazy, 108892 SolverSat, 1555 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7044 GetRequests, 3621 SyntacticMatches, 18 SemanticMatches, 3405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71820 ImplicationChecksByTransitivity, 157.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=189occurred in iteration=46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 46 MinimizatonAttempts, 1375 StatesRemovedByMinimization, 46 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 78.9s InterpolantComputationTime, 8814 NumberOfCodeBlocks, 8712 NumberOfCodeBlocksAsserted, 402 NumberOfCheckSat, 8723 ConstructedInterpolants, 0 QuantifiedInterpolants, 8209326 SizeOfPredicates, 140 NumberOfNonLiveVariables, 6387 ConjunctsInSsa, 1892 ConjunctsInUnsatCore, 91 InterpolantComputations, 3 PerfectInterpolantSequences, 22541/74298 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-32-49-759.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/ArrayInit02.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-32-49-759.csv Completed graceful shutdown