java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:26:12,112 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:26:12,114 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:26:12,128 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:26:12,128 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:26:12,131 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:26:12,133 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:26:12,136 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:26:12,137 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:26:12,138 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:26:12,140 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 12:26:12,189 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 12:26:12,218 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:26:12,218 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:26:12,220 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:26:12,220 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:26:12,220 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:26:12,221 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:26:12,221 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:26:12,221 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:26:12,221 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:26:12,221 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:26:12,222 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:26:12,223 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:26:12,223 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:26:12,223 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:26:12,223 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:26:12,224 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:26:12,225 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:26:12,225 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:26:12,226 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:26:12,226 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:26:12,226 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:26:12,226 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:26:12,226 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:26:12,227 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:26:12,227 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:26:12,227 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:26:12,227 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:26:12,228 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:26:12,228 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:26:12,228 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:26:12,294 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:26:12,310 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:26:12,316 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:26:12,318 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:26:12,319 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:26:12,319 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl [2018-10-04 12:26:12,320 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/nested.i_4.bpl' [2018-10-04 12:26:12,373 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:26:12,375 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:26:12,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:26:12,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:26:12,376 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:26:12,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:12" (1/1) ... [2018-10-04 12:26:12,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:12" (1/1) ... [2018-10-04 12:26:12,415 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:26:12,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:26:12,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:26:12,416 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:26:12,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:12" (1/1) ... [2018-10-04 12:26:12,425 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:12" (1/1) ... [2018-10-04 12:26:12,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:12" (1/1) ... [2018-10-04 12:26:12,426 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:12" (1/1) ... [2018-10-04 12:26:12,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:12" (1/1) ... [2018-10-04 12:26:12,430 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:12" (1/1) ... [2018-10-04 12:26:12,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:12" (1/1) ... [2018-10-04 12:26:12,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:26:12,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:26:12,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:26:12,434 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:26:12,435 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:12" (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 12:26:12,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:26:12,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:26:12,816 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:26:12,816 INFO L202 PluginConnector]: Adding new model nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:26:12 BoogieIcfgContainer [2018-10-04 12:26:12,816 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:26:12,817 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:26:12,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:26:12,821 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:26:12,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:26:12" (1/2) ... [2018-10-04 12:26:12,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@729ef200 and model type nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:26:12, skipping insertion in model container [2018-10-04 12:26:12,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "nested.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:26:12" (2/2) ... [2018-10-04 12:26:12,826 INFO L112 eAbstractionObserver]: Analyzing ICFG nested.i_4.bpl [2018-10-04 12:26:12,837 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:26:12,846 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:26:12,903 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:26:12,904 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:26:12,905 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:26:12,905 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:26:12,905 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:26:12,905 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:26:12,905 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:26:12,906 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:26:12,906 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:26:12,921 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 12:26:12,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:26:12,928 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:12,929 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:26:12,930 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:12,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:12,937 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 12:26:12,939 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:12,939 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:12,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:12,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:26:12,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:13,083 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 12:26:13,087 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:26:13,088 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:26:13,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:26:13,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:26:13,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:26:13,107 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 12:26:13,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:13,175 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2018-10-04 12:26:13,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:26:13,177 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 12:26:13,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:13,187 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:26:13,187 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:26:13,190 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2018-10-04 12:26:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:26:13,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 9. [2018-10-04 12:26:13,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:26:13,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 12:26:13,226 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 4 [2018-10-04 12:26:13,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:13,227 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 12:26:13,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:26:13,227 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 12:26:13,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:26:13,227 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:13,228 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:26:13,228 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:13,228 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:13,229 INFO L82 PathProgramCache]: Analyzing trace with hash 209100445, now seen corresponding path program 1 times [2018-10-04 12:26:13,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:13,229 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:13,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:13,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:26:13,232 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:13,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:26:13,354 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:26:13,354 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:26:13,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:26:13,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:26:13,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2018-10-04 12:26:13,358 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2018-10-04 12:26:13,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:13,458 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2018-10-04 12:26:13,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:26:13,465 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2018-10-04 12:26:13,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:13,466 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:26:13,466 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:26:13,467 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 12:26:13,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:26:13,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:26:13,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:26:13,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 12:26:13,472 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-04 12:26:13,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:13,474 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 12:26:13,474 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:26:13,474 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 12:26:13,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:26:13,475 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:13,476 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:26:13,476 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:13,476 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:13,477 INFO L82 PathProgramCache]: Analyzing trace with hash -850198025, now seen corresponding path program 1 times [2018-10-04 12:26:13,477 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:13,477 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:13,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:13,478 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:26:13,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:13,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:26:13,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:13,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:26:13,612 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:26:13,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:13,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:26:13,766 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:26:13,766 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2018-10-04 12:26:13,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:26:13,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:26:13,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:26:13,768 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2018-10-04 12:26:13,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:13,825 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2018-10-04 12:26:13,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:26:13,825 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2018-10-04 12:26:13,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:13,826 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:26:13,826 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:26:13,827 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:26:13,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:26:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:26:13,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:26:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2018-10-04 12:26:13,832 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2018-10-04 12:26:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:13,832 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2018-10-04 12:26:13,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:26:13,833 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2018-10-04 12:26:13,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:26:13,833 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:13,834 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1] [2018-10-04 12:26:13,834 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:13,834 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:13,835 INFO L82 PathProgramCache]: Analyzing trace with hash -928778543, now seen corresponding path program 2 times [2018-10-04 12:26:13,835 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:13,835 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:13,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:13,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:26:13,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:14,128 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 12:26:14,129 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:14,129 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 12:26:14,146 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:26:14,166 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:26:14,166 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:26:14,169 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:14,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2018-10-04 12:26:14,342 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:26:14,342 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 7 [2018-10-04 12:26:14,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:26:14,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:26:14,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:26:14,344 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 8 states. [2018-10-04 12:26:14,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:14,798 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2018-10-04 12:26:14,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:26:14,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2018-10-04 12:26:14,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:14,800 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:26:14,801 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:26:14,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:26:14,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:26:14,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2018-10-04 12:26:14,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:26:14,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2018-10-04 12:26:14,812 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2018-10-04 12:26:14,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:14,813 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2018-10-04 12:26:14,813 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:26:14,813 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2018-10-04 12:26:14,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:26:14,814 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:14,814 INFO L375 BasicCegarLoop]: trace histogram [8, 6, 3, 2, 2, 1, 1, 1] [2018-10-04 12:26:14,815 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:14,815 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:14,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1778757007, now seen corresponding path program 3 times [2018-10-04 12:26:14,815 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:14,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:14,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:14,817 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:26:14,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:14,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2018-10-04 12:26:15,006 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:15,006 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 12:26:15,025 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:26:15,080 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 12:26:15,080 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:26:15,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:15,372 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2018-10-04 12:26:15,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:26:15,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2018-10-04 12:26:15,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:26:15,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:26:15,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:26:15,399 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 10 states. [2018-10-04 12:26:15,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:15,986 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2018-10-04 12:26:15,988 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:26:15,989 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2018-10-04 12:26:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:15,990 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:26:15,990 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:26:15,991 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:26:15,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:26:16,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 41. [2018-10-04 12:26:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:26:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2018-10-04 12:26:16,004 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 24 [2018-10-04 12:26:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:16,004 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2018-10-04 12:26:16,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:26:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2018-10-04 12:26:16,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:26:16,006 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:16,008 INFO L375 BasicCegarLoop]: trace histogram [15, 12, 4, 3, 3, 1, 1, 1] [2018-10-04 12:26:16,008 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:16,008 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:16,009 INFO L82 PathProgramCache]: Analyzing trace with hash 209827969, now seen corresponding path program 4 times [2018-10-04 12:26:16,009 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:16,009 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:16,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:16,010 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:26:16,010 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:16,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 106 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-04 12:26:16,259 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:16,260 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 12:26:16,268 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:26:16,300 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:26:16,300 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:26:16,304 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:16,425 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 106 proven. 20 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2018-10-04 12:26:16,445 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:26:16,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2018-10-04 12:26:16,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:26:16,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:26:16,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:26:16,447 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 13 states. [2018-10-04 12:26:16,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:16,495 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2018-10-04 12:26:16,495 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:26:16,495 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 40 [2018-10-04 12:26:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:16,496 INFO L225 Difference]: With dead ends: 75 [2018-10-04 12:26:16,496 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:26:16,497 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:26:16,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:26:16,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:26:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:26:16,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2018-10-04 12:26:16,510 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2018-10-04 12:26:16,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:16,511 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2018-10-04 12:26:16,511 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:26:16,511 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2018-10-04 12:26:16,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:26:16,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:16,513 INFO L375 BasicCegarLoop]: trace histogram [18, 15, 4, 3, 3, 1, 1, 1] [2018-10-04 12:26:16,513 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:16,513 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:16,515 INFO L82 PathProgramCache]: Analyzing trace with hash -254509681, now seen corresponding path program 5 times [2018-10-04 12:26:16,515 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:16,515 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:16,516 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:16,516 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:26:16,517 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 150 proven. 30 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-10-04 12:26:16,675 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:16,676 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 12:26:16,694 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:26:16,749 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2018-10-04 12:26:16,750 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:26:16,755 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:16,954 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 150 proven. 30 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2018-10-04 12:26:16,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:26:16,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2018-10-04 12:26:16,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:26:16,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:26:16,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:26:16,978 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 15 states. [2018-10-04 12:26:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:17,050 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2018-10-04 12:26:17,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:26:17,056 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2018-10-04 12:26:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:17,057 INFO L225 Difference]: With dead ends: 85 [2018-10-04 12:26:17,057 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:26:17,058 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:26:17,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:26:17,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 12:26:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:26:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2018-10-04 12:26:17,071 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2018-10-04 12:26:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:17,072 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2018-10-04 12:26:17,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:26:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2018-10-04 12:26:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:26:17,074 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:17,074 INFO L375 BasicCegarLoop]: trace histogram [21, 18, 4, 3, 3, 1, 1, 1] [2018-10-04 12:26:17,074 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:17,074 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:17,074 INFO L82 PathProgramCache]: Analyzing trace with hash -996261859, now seen corresponding path program 6 times [2018-10-04 12:26:17,075 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:17,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:17,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:17,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:26:17,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 202 proven. 42 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2018-10-04 12:26:17,242 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:17,242 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 12:26:17,251 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:26:17,273 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2018-10-04 12:26:17,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:26:17,276 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:17,382 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2018-10-04 12:26:17,403 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:26:17,404 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 13 [2018-10-04 12:26:17,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:26:17,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:26:17,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:26:17,405 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 14 states. [2018-10-04 12:26:17,885 WARN L178 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2018-10-04 12:26:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:19,241 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2018-10-04 12:26:19,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:26:19,244 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2018-10-04 12:26:19,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:19,245 INFO L225 Difference]: With dead ends: 129 [2018-10-04 12:26:19,245 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 12:26:19,247 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=850, Invalid=1906, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:26:19,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 12:26:19,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2018-10-04 12:26:19,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2018-10-04 12:26:19,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2018-10-04 12:26:19,266 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 52 [2018-10-04 12:26:19,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:19,267 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2018-10-04 12:26:19,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:26:19,267 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2018-10-04 12:26:19,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2018-10-04 12:26:19,269 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:19,270 INFO L375 BasicCegarLoop]: trace histogram [32, 28, 5, 4, 4, 1, 1, 1] [2018-10-04 12:26:19,270 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:19,270 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:19,270 INFO L82 PathProgramCache]: Analyzing trace with hash -252111625, now seen corresponding path program 7 times [2018-10-04 12:26:19,271 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:19,271 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:19,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:19,272 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:26:19,272 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:19,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:19,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 392 proven. 56 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2018-10-04 12:26:19,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:19,625 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 12:26:19,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:26:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:19,676 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1012 backedges. 392 proven. 56 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2018-10-04 12:26:19,824 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:26:19,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2018-10-04 12:26:19,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:26:19,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:26:19,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:26:19,826 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 19 states. [2018-10-04 12:26:20,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:20,065 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2018-10-04 12:26:20,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:26:20,066 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 76 [2018-10-04 12:26:20,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:20,067 INFO L225 Difference]: With dead ends: 143 [2018-10-04 12:26:20,067 INFO L226 Difference]: Without dead ends: 85 [2018-10-04 12:26:20,068 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:26:20,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2018-10-04 12:26:20,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2018-10-04 12:26:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2018-10-04 12:26:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2018-10-04 12:26:20,087 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 76 [2018-10-04 12:26:20,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:20,087 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2018-10-04 12:26:20,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:26:20,087 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2018-10-04 12:26:20,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2018-10-04 12:26:20,089 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:20,089 INFO L375 BasicCegarLoop]: trace histogram [36, 32, 5, 4, 4, 1, 1, 1] [2018-10-04 12:26:20,089 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:20,090 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:20,090 INFO L82 PathProgramCache]: Analyzing trace with hash 771511391, now seen corresponding path program 8 times [2018-10-04 12:26:20,090 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:20,090 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:20,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:20,091 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:26:20,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:20,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 494 proven. 72 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-10-04 12:26:20,600 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:20,600 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:26:20,610 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:26:20,668 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:26:20,668 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:26:20,673 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1280 backedges. 494 proven. 72 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2018-10-04 12:26:21,041 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:26:21,041 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2018-10-04 12:26:21,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:26:21,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:26:21,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:26:21,042 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 21 states. [2018-10-04 12:26:21,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:21,098 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2018-10-04 12:26:21,101 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:26:21,101 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 84 [2018-10-04 12:26:21,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:21,102 INFO L225 Difference]: With dead ends: 157 [2018-10-04 12:26:21,102 INFO L226 Difference]: Without dead ends: 93 [2018-10-04 12:26:21,103 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:26:21,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2018-10-04 12:26:21,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2018-10-04 12:26:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2018-10-04 12:26:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2018-10-04 12:26:21,121 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 84 [2018-10-04 12:26:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:21,122 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2018-10-04 12:26:21,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:26:21,122 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2018-10-04 12:26:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2018-10-04 12:26:21,123 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:21,123 INFO L375 BasicCegarLoop]: trace histogram [40, 36, 5, 4, 4, 1, 1, 1] [2018-10-04 12:26:21,124 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:21,124 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:21,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1630563271, now seen corresponding path program 9 times [2018-10-04 12:26:21,124 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:21,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:21,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:21,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:26:21,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 608 proven. 90 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-10-04 12:26:21,308 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:21,308 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 12:26:21,319 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:26:21,399 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2018-10-04 12:26:21,399 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:26:21,404 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 608 proven. 90 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2018-10-04 12:26:21,742 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:26:21,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2018-10-04 12:26:21,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:26:21,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:26:21,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:26:21,744 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 23 states. [2018-10-04 12:26:21,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:21,804 INFO L93 Difference]: Finished difference Result 171 states and 182 transitions. [2018-10-04 12:26:21,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:26:21,807 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 92 [2018-10-04 12:26:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:21,808 INFO L225 Difference]: With dead ends: 171 [2018-10-04 12:26:21,808 INFO L226 Difference]: Without dead ends: 101 [2018-10-04 12:26:21,809 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:26:21,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2018-10-04 12:26:21,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2018-10-04 12:26:21,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2018-10-04 12:26:21,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2018-10-04 12:26:21,828 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 92 [2018-10-04 12:26:21,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:21,828 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2018-10-04 12:26:21,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:26:21,829 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2018-10-04 12:26:21,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2018-10-04 12:26:21,830 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:21,830 INFO L375 BasicCegarLoop]: trace histogram [44, 40, 5, 4, 4, 1, 1, 1] [2018-10-04 12:26:21,831 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:21,831 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:21,831 INFO L82 PathProgramCache]: Analyzing trace with hash -220374225, now seen corresponding path program 10 times [2018-10-04 12:26:21,831 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:21,831 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:21,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:21,832 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:26:21,832 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:22,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1472 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-04 12:26:22,000 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:22,001 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:26:22,010 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:26:22,077 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:26:22,077 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:26:22,082 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1912 backedges. 0 proven. 1472 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2018-10-04 12:26:22,267 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:26:22,267 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2018-10-04 12:26:22,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:26:22,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:26:22,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:26:22,268 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 12 states. [2018-10-04 12:26:22,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:22,533 INFO L93 Difference]: Finished difference Result 149 states and 155 transitions. [2018-10-04 12:26:22,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:26:22,535 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 100 [2018-10-04 12:26:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:22,537 INFO L225 Difference]: With dead ends: 149 [2018-10-04 12:26:22,537 INFO L226 Difference]: Without dead ends: 147 [2018-10-04 12:26:22,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:26:22,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2018-10-04 12:26:22,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 125. [2018-10-04 12:26:22,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2018-10-04 12:26:22,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2018-10-04 12:26:22,578 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 100 [2018-10-04 12:26:22,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:22,578 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2018-10-04 12:26:22,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:26:22,579 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2018-10-04 12:26:22,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2018-10-04 12:26:22,586 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:22,586 INFO L375 BasicCegarLoop]: trace histogram [55, 50, 6, 5, 5, 1, 1, 1] [2018-10-04 12:26:22,586 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:22,586 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:22,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1446024969, now seen corresponding path program 11 times [2018-10-04 12:26:22,587 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:22,587 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:22,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:22,588 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:26:22,588 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:22,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-04 12:26:23,037 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:23,037 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 12:26:23,044 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:26:23,125 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2018-10-04 12:26:23,125 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:26:23,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3000 backedges. 0 proven. 2450 refuted. 0 times theorem prover too weak. 550 trivial. 0 not checked. [2018-10-04 12:26:23,296 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:26:23,297 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2018-10-04 12:26:23,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:26:23,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:26:23,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:26:23,298 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand 14 states. [2018-10-04 12:26:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:23,395 INFO L93 Difference]: Finished difference Result 173 states and 180 transitions. [2018-10-04 12:26:23,395 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:26:23,396 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 124 [2018-10-04 12:26:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:23,397 INFO L225 Difference]: With dead ends: 173 [2018-10-04 12:26:23,397 INFO L226 Difference]: Without dead ends: 171 [2018-10-04 12:26:23,398 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:26:23,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2018-10-04 12:26:23,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 149. [2018-10-04 12:26:23,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2018-10-04 12:26:23,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 155 transitions. [2018-10-04 12:26:23,425 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 155 transitions. Word has length 124 [2018-10-04 12:26:23,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:23,425 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 155 transitions. [2018-10-04 12:26:23,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:26:23,425 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 155 transitions. [2018-10-04 12:26:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2018-10-04 12:26:23,427 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:23,427 INFO L375 BasicCegarLoop]: trace histogram [66, 60, 7, 6, 6, 1, 1, 1] [2018-10-04 12:26:23,427 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:23,428 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:23,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1667523811, now seen corresponding path program 12 times [2018-10-04 12:26:23,428 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:23,428 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:23,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:23,429 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:26:23,429 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:23,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 3672 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-04 12:26:23,645 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:23,645 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 12:26:23,653 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:26:23,772 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 12:26:23,773 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:26:23,776 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4332 backedges. 0 proven. 3672 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2018-10-04 12:26:24,002 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:26:24,003 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2018-10-04 12:26:24,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:26:24,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:26:24,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:26:24,004 INFO L87 Difference]: Start difference. First operand 149 states and 155 transitions. Second operand 16 states. [2018-10-04 12:26:24,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:24,082 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2018-10-04 12:26:24,083 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:26:24,083 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 148 [2018-10-04 12:26:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:24,084 INFO L225 Difference]: With dead ends: 197 [2018-10-04 12:26:24,084 INFO L226 Difference]: Without dead ends: 195 [2018-10-04 12:26:24,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:26:24,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2018-10-04 12:26:24,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 173. [2018-10-04 12:26:24,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2018-10-04 12:26:24,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 180 transitions. [2018-10-04 12:26:24,109 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 180 transitions. Word has length 148 [2018-10-04 12:26:24,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:24,110 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 180 transitions. [2018-10-04 12:26:24,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:26:24,110 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 180 transitions. [2018-10-04 12:26:24,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2018-10-04 12:26:24,112 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:24,112 INFO L375 BasicCegarLoop]: trace histogram [77, 70, 8, 7, 7, 1, 1, 1] [2018-10-04 12:26:24,112 INFO L423 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:24,112 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:24,112 INFO L82 PathProgramCache]: Analyzing trace with hash 107136189, now seen corresponding path program 13 times [2018-10-04 12:26:24,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:24,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:24,113 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:24,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:26:24,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:24,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 5138 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-04 12:26:24,357 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:24,357 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 12:26:24,366 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:26:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:24,444 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 5138 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2018-10-04 12:26:24,698 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:26:24,698 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2018-10-04 12:26:24,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:26:24,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:26:24,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:26:24,700 INFO L87 Difference]: Start difference. First operand 173 states and 180 transitions. Second operand 18 states. [2018-10-04 12:26:24,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:24,818 INFO L93 Difference]: Finished difference Result 221 states and 230 transitions. [2018-10-04 12:26:24,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:26:24,818 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 172 [2018-10-04 12:26:24,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:24,819 INFO L225 Difference]: With dead ends: 221 [2018-10-04 12:26:24,819 INFO L226 Difference]: Without dead ends: 219 [2018-10-04 12:26:24,820 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:26:24,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2018-10-04 12:26:24,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 197. [2018-10-04 12:26:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2018-10-04 12:26:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 205 transitions. [2018-10-04 12:26:24,854 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 205 transitions. Word has length 172 [2018-10-04 12:26:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:24,854 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 205 transitions. [2018-10-04 12:26:24,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:26:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 205 transitions. [2018-10-04 12:26:24,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2018-10-04 12:26:24,857 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:24,857 INFO L375 BasicCegarLoop]: trace histogram [88, 80, 9, 8, 8, 1, 1, 1] [2018-10-04 12:26:24,857 INFO L423 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:24,857 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:24,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1927956841, now seen corresponding path program 14 times [2018-10-04 12:26:24,858 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:24,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:24,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:24,859 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:26:24,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:24,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:25,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 0 proven. 6848 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-04 12:26:25,143 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:25,143 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 12:26:25,152 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:26:25,238 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:26:25,239 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:26:25,247 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:25,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7728 backedges. 0 proven. 6848 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2018-10-04 12:26:25,473 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:26:25,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2018-10-04 12:26:25,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:26:25,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:26:25,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:26:25,475 INFO L87 Difference]: Start difference. First operand 197 states and 205 transitions. Second operand 20 states. [2018-10-04 12:26:25,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:25,608 INFO L93 Difference]: Finished difference Result 245 states and 255 transitions. [2018-10-04 12:26:25,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:26:25,608 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 196 [2018-10-04 12:26:25,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:25,610 INFO L225 Difference]: With dead ends: 245 [2018-10-04 12:26:25,610 INFO L226 Difference]: Without dead ends: 243 [2018-10-04 12:26:25,611 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:26:25,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2018-10-04 12:26:25,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 221. [2018-10-04 12:26:25,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2018-10-04 12:26:25,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 230 transitions. [2018-10-04 12:26:25,651 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 230 transitions. Word has length 196 [2018-10-04 12:26:25,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:25,651 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 230 transitions. [2018-10-04 12:26:25,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:26:25,652 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 230 transitions. [2018-10-04 12:26:25,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2018-10-04 12:26:25,654 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:25,654 INFO L375 BasicCegarLoop]: trace histogram [99, 90, 10, 9, 9, 1, 1, 1] [2018-10-04 12:26:25,654 INFO L423 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:25,654 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:25,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1486407055, now seen corresponding path program 15 times [2018-10-04 12:26:25,655 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:25,655 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:25,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:25,656 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:26:25,656 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9792 backedges. 0 proven. 8802 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-04 12:26:26,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:26:26,536 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 12:26:26,559 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:26:26,681 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2018-10-04 12:26:26,681 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:26:26,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:26:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9792 backedges. 0 proven. 8802 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2018-10-04 12:26:26,907 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:26:26,908 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2018-10-04 12:26:26,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:26:26,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:26:26,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:26:26,909 INFO L87 Difference]: Start difference. First operand 221 states and 230 transitions. Second operand 22 states. [2018-10-04 12:26:27,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:27,198 INFO L93 Difference]: Finished difference Result 269 states and 280 transitions. [2018-10-04 12:26:27,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:26:27,199 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 220 [2018-10-04 12:26:27,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:27,200 INFO L225 Difference]: With dead ends: 269 [2018-10-04 12:26:27,200 INFO L226 Difference]: Without dead ends: 267 [2018-10-04 12:26:27,201 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=186, Invalid=276, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:26:27,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2018-10-04 12:26:27,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 245. [2018-10-04 12:26:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2018-10-04 12:26:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 255 transitions. [2018-10-04 12:26:27,249 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 255 transitions. Word has length 220 [2018-10-04 12:26:27,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:27,250 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 255 transitions. [2018-10-04 12:26:27,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:26:27,250 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 255 transitions. [2018-10-04 12:26:27,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2018-10-04 12:26:27,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:26:27,251 INFO L375 BasicCegarLoop]: trace histogram [110, 100, 11, 10, 10, 1, 1, 1] [2018-10-04 12:26:27,252 INFO L423 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:26:27,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:26:27,252 INFO L82 PathProgramCache]: Analyzing trace with hash 1732333643, now seen corresponding path program 16 times [2018-10-04 12:26:27,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:26:27,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:26:27,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:27,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:26:27,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:26:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:26:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 12082 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2018-10-04 12:26:32,791 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:26:32,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2018-10-04 12:26:32,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2018-10-04 12:26:32,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2018-10-04 12:26:32,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 12:26:32,796 INFO L87 Difference]: Start difference. First operand 245 states and 255 transitions. Second operand 103 states. [2018-10-04 12:26:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:26:35,724 INFO L93 Difference]: Finished difference Result 10235 states and 10695 transitions. [2018-10-04 12:26:35,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2018-10-04 12:26:35,724 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 244 [2018-10-04 12:26:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:26:35,725 INFO L225 Difference]: With dead ends: 10235 [2018-10-04 12:26:35,725 INFO L226 Difference]: Without dead ends: 0 [2018-10-04 12:26:35,741 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2018-10-04 12:26:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-10-04 12:26:35,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-10-04 12:26:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-10-04 12:26:35,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-10-04 12:26:35,742 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 244 [2018-10-04 12:26:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:26:35,742 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-10-04 12:26:35,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 103 states. [2018-10-04 12:26:35,742 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-10-04 12:26:35,742 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-10-04 12:26:35,747 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2018-10-04 12:26:41,924 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:41,926 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:41,937 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:42,093 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:42,180 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:42,227 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:42,328 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:42,365 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:42,556 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:42,629 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:42,848 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:42,919 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:43,227 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:43,274 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:43,495 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:43,703 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:43,947 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:44,151 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:44,326 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:44,673 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:44,756 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:45,440 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:45,540 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:45,645 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:45,892 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:46,203 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:46,765 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:47,193 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:47,469 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:47,640 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:47,801 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:47,968 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:48,816 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:48,935 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:49,232 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:49,359 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:50,005 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:50,226 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:50,342 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:50,798 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:50,939 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:51,100 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:51,140 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:51,869 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:52,008 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:52,051 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:52,156 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:52,198 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:52,304 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:52,444 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:53,653 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:53,665 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:54,019 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:54,763 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:55,252 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:55,704 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:56,182 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:26:58,494 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:00,497 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:00,667 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:01,172 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:01,187 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:04,401 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:05,871 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:06,097 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:06,692 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:07,616 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:09,991 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:11,961 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:14,903 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:17,453 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:21,382 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:21,550 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:29,127 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:53,073 WARN L178 SmtUtils]: Spent 1.29 m on a formula simplification. DAG size of input: 5105 DAG size of output: 1935 [2018-10-04 12:27:57,451 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:57,452 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:57,456 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:57,521 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:57,564 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:57,588 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:57,642 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:57,660 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:57,749 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:57,786 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:57,916 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:57,958 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:58,133 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:58,162 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:58,281 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:58,341 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:58,487 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:58,609 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:58,724 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:59,070 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:59,144 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:59,769 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:59,868 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:27:59,969 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:00,218 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:00,497 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:00,912 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:01,333 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:01,625 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:01,826 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:02,004 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:02,185 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:03,068 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:03,189 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:03,467 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:03,584 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:04,188 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:04,397 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:04,509 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:04,972 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:05,112 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:05,244 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:05,274 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:05,808 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:05,949 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:05,992 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:06,100 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:06,143 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:06,250 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:06,535 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:07,778 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:07,790 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:08,167 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:08,802 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:09,293 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:09,766 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:10,399 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:12,384 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:14,707 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:14,904 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:15,419 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:15,434 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:18,458 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:19,569 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:19,771 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:20,366 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:21,313 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:23,676 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:25,552 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:28,115 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:30,554 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:34,357 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:34,523 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:28:42,137 WARN L250 erpolLogProxyWrapper]: Already inconsistent. [2018-10-04 12:29:05,219 WARN L178 SmtUtils]: Spent 1.20 m on a formula simplification. DAG size of input: 5105 DAG size of output: 1935 [2018-10-04 12:29:06,041 WARN L178 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-10-04 12:29:06,967 WARN L178 SmtUtils]: Spent 924.00 ms on a formula simplification. DAG size of input: 673 DAG size of output: 664 [2018-10-04 12:30:20,293 WARN L178 SmtUtils]: Spent 1.22 m on a formula simplification. DAG size of input: 1932 DAG size of output: 362 Received shutdown request... [2018-10-04 12:30:28,661 WARN L186 SmtUtils]: Removed 1243 from assertion stack [2018-10-04 12:30:28,661 INFO L256 ToolchainWalker]: Toolchain cancelled while executing plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction. Reason: Timeout or Toolchain cancelled by user [2018-10-04 12:30:28,662 INFO L168 Benchmark]: Toolchain (without parser) took 256288.57 ms. Allocated memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: 1.7 GB). Free memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: -1.0 GB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-10-04 12:30:28,664 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 12:30:28,664 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.45 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 12:30:28,665 INFO L168 Benchmark]: Boogie Preprocessor took 17.82 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 12:30:28,665 INFO L168 Benchmark]: RCFGBuilder took 382.87 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:30:28,666 INFO L168 Benchmark]: TraceAbstraction took 255844.36 ms. Allocated memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: 1.7 GB). Free memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: -1.0 GB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. [2018-10-04 12:30:28,670 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 39.45 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 17.82 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. * RCFGBuilder took 382.87 ms. Allocated memory is still 1.5 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 255844.36 ms. Allocated memory was 1.5 GB in the beginning and 3.2 GB in the end (delta: 1.7 GB). Free memory was 1.5 GB in the beginning and 2.5 GB in the end (delta: -1.0 GB). Peak memory consumption was 3.1 GB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: assertion always holds For all program executions holds that assertion always holds at this location - TimeoutResult: Timeout (de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction) Toolchain cancelled while SimplifyDDAWithTimeout was simplifying term of DAG size 1932. RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/nested.i_4.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-30-28-681.csv Completed graceful shutdown