java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum02.i_3.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:53:37,229 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:53:37,232 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:53:37,248 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:53:37,248 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:53:37,249 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:53:37,251 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:53:37,254 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:53:37,255 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:53:37,259 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:53:37,260 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2018-10-04 12:53:37,300 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 12:53:37,327 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:53:37,327 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:53:37,328 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:53:37,328 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:53:37,329 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:53:37,332 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:53:37,333 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:53:37,333 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:53:37,333 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:53:37,333 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:53:37,333 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:53:37,334 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:53:37,334 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:53:37,334 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:53:37,334 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:53:37,334 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:53:37,334 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:53:37,335 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:53:37,336 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:53:37,336 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:53:37,336 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:53:37,336 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:53:37,337 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:53:37,337 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:53:37,337 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:53:37,337 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:53:37,337 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:53:37,338 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:53:37,338 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:53:37,338 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:53:37,338 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 12:53:37,403 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:53:37,418 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:53:37,423 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:53:37,425 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:53:37,425 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:53:37,426 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum02.i_3.bpl [2018-10-04 12:53:37,426 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/sum02.i_3.bpl' [2018-10-04 12:53:37,482 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:53:37,484 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:53:37,484 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:53:37,485 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:53:37,485 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:53:37,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:37" (1/1) ... [2018-10-04 12:53:37,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:37" (1/1) ... [2018-10-04 12:53:37,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:53:37,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:53:37,526 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:53:37,527 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:53:37,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:37" (1/1) ... [2018-10-04 12:53:37,538 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:37" (1/1) ... [2018-10-04 12:53:37,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:37" (1/1) ... [2018-10-04 12:53:37,539 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:37" (1/1) ... [2018-10-04 12:53:37,543 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:37" (1/1) ... [2018-10-04 12:53:37,546 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:37" (1/1) ... [2018-10-04 12:53:37,546 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:37" (1/1) ... [2018-10-04 12:53:37,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:53:37,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:53:37,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:53:37,556 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:53:37,558 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:37" (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 12:53:37,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:53:37,613 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:53:37,869 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:53:37,870 INFO L202 PluginConnector]: Adding new model sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:53:37 BoogieIcfgContainer [2018-10-04 12:53:37,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:53:37,872 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:53:37,872 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:53:37,876 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:53:37,876 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:53:37" (1/2) ... [2018-10-04 12:53:37,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29dd3a2d and model type sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:53:37, skipping insertion in model container [2018-10-04 12:53:37,877 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "sum02.i_3.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:53:37" (2/2) ... [2018-10-04 12:53:37,879 INFO L112 eAbstractionObserver]: Analyzing ICFG sum02.i_3.bpl [2018-10-04 12:53:37,889 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:53:37,900 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:53:37,953 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:53:37,954 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:53:37,954 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:53:37,955 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:53:37,955 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:53:37,955 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:53:37,955 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:53:37,955 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:53:37,956 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:53:37,974 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2018-10-04 12:53:37,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:53:37,980 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:37,981 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:53:37,982 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:37,989 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:37,989 INFO L82 PathProgramCache]: Analyzing trace with hash 925639, now seen corresponding path program 1 times [2018-10-04 12:53:37,992 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:37,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:38,043 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:38,043 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:38,044 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:38,077 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:53:38,077 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:53:38,078 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:53:38,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:38,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:38,259 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 12:53:38,293 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:53:38,294 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2018-10-04 12:53:38,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2018-10-04 12:53:38,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2018-10-04 12:53:38,315 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:38,319 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2018-10-04 12:53:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:38,382 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2018-10-04 12:53:38,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2018-10-04 12:53:38,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2018-10-04 12:53:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:38,396 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:53:38,396 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:53:38,399 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 1 [2018-10-04 12:53:38,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:53:38,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:53:38,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:53:38,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 12:53:38,430 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2018-10-04 12:53:38,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:38,431 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 12:53:38,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2018-10-04 12:53:38,431 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 12:53:38,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:53:38,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:38,432 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 12:53:38,432 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:38,432 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:38,432 INFO L82 PathProgramCache]: Analyzing trace with hash 889591169, now seen corresponding path program 1 times [2018-10-04 12:53:38,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:38,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:38,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:38,434 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:38,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:38,441 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:53:38,441 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:53:38,441 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:53:38,456 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:53:38,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:38,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:38,530 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:53:38,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2018-10-04 12:53:38,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:53:38,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:53:38,532 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:38,533 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2018-10-04 12:53:38,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:38,577 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 12:53:38,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:53:38,578 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 12:53:38,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:38,579 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:53:38,579 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:53:38,580 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 2 [2018-10-04 12:53:38,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:53:38,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:53:38,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:53:38,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 12:53:38,583 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2018-10-04 12:53:38,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:38,583 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 12:53:38,583 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:53:38,584 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 12:53:38,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:53:38,584 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:38,584 INFO L375 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2018-10-04 12:53:38,585 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:38,585 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:38,585 INFO L82 PathProgramCache]: Analyzing trace with hash 198673595, now seen corresponding path program 2 times [2018-10-04 12:53:38,585 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:38,585 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:38,586 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:38,587 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:53:38,587 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:38,596 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:53:38,596 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:53:38,597 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:53:38,611 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:53:38,700 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:53:38,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:53:38,702 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:53:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:53:38,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:53:38,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-10-04 12:53:38,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:53:38,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:53:38,858 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:53:38,858 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 5 states. [2018-10-04 12:53:38,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:53:38,974 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 12:53:38,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:53:38,975 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 12:53:38,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:53:38,976 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:53:38,976 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:53:38,976 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-04 12:53:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:53:38,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:53:38,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:53:38,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 12:53:38,981 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2018-10-04 12:53:38,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:53:38,981 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 12:53:38,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:53:38,982 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 12:53:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:53:38,983 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:53:38,984 INFO L375 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1] [2018-10-04 12:53:38,984 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:53:38,984 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:53:38,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1946815861, now seen corresponding path program 3 times [2018-10-04 12:53:38,985 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:53:38,985 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:53:38,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:38,986 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:53:38,986 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:53:39,005 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:53:39,005 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:53:39,005 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:53:39,019 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:55:20,442 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2018-10-04 12:55:20,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:20,445 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:20,654 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:20,675 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:55:20,675 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-04 12:55:20,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:55:20,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:55:20,676 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:20,676 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 6 states. [2018-10-04 12:55:20,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:20,993 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 12:55:20,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:55:20,994 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2018-10-04 12:55:20,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:20,994 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:55:20,995 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:55:20,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-04 12:55:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:55:20,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:55:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:55:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 12:55:21,000 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2018-10-04 12:55:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:21,001 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 12:55:21,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:55:21,001 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 12:55:21,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:55:21,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:21,002 INFO L375 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1] [2018-10-04 12:55:21,002 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:21,002 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:21,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1715646545, now seen corresponding path program 4 times [2018-10-04 12:55:21,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:21,003 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:21,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:21,004 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:21,004 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:21,015 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:55:21,015 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:55:21,016 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:55:21,026 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:55:21,514 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:55:21,514 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:21,517 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:21,827 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:55:21,827 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-04 12:55:21,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:55:21,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:55:21,828 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:21,829 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 7 states. [2018-10-04 12:55:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:21,959 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 12:55:21,959 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:55:21,959 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2018-10-04 12:55:21,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:21,960 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:55:21,960 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:55:21,961 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 5 [2018-10-04 12:55:21,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:55:21,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:55:21,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:55:21,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 12:55:21,965 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2018-10-04 12:55:21,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:21,965 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 12:55:21,966 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:55:21,966 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 12:55:21,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:55:21,966 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:21,967 INFO L375 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1] [2018-10-04 12:55:21,967 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:21,967 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:21,967 INFO L82 PathProgramCache]: Analyzing trace with hash 531164009, now seen corresponding path program 5 times [2018-10-04 12:55:21,967 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:21,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:21,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:21,968 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:21,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:21,981 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:55:21,981 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:55:21,982 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:55:21,992 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:55:36,771 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2018-10-04 12:55:36,772 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:36,774 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:36,955 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:36,976 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:55:36,977 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-04 12:55:36,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:55:36,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:55:36,977 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:36,978 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 8 states. [2018-10-04 12:55:37,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:37,127 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 12:55:37,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:55:37,129 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2018-10-04 12:55:37,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:37,129 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:55:37,130 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:55:37,130 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 12:55:37,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:55:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:55:37,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:55:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 12:55:37,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2018-10-04 12:55:37,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:37,136 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 12:55:37,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:55:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 12:55:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:55:37,137 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:37,138 INFO L375 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1] [2018-10-04 12:55:37,138 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:37,138 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:37,138 INFO L82 PathProgramCache]: Analyzing trace with hash -652443485, now seen corresponding path program 6 times [2018-10-04 12:55:37,139 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:37,139 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:37,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:37,140 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:37,140 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:37,163 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:55:37,163 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:55:37,163 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:55:37,180 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:55:41,488 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:55:41,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:55:41,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:41,696 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:55:41,697 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-04 12:55:41,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:55:41,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:55:41,697 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:41,697 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2018-10-04 12:55:41,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:41,868 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 12:55:41,869 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:55:41,869 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2018-10-04 12:55:41,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:41,870 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:55:41,870 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:55:41,870 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 7 [2018-10-04 12:55:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:55:41,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:55:41,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:55:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 12:55:41,875 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2018-10-04 12:55:41,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:41,875 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 12:55:41,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:55:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 12:55:41,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:55:41,876 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:41,877 INFO L375 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1] [2018-10-04 12:55:41,877 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:41,877 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:41,877 INFO L82 PathProgramCache]: Analyzing trace with hash 67088221, now seen corresponding path program 7 times [2018-10-04 12:55:41,877 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:41,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:41,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:41,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:55:41,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:41,891 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:55:41,891 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:55:41,891 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:55:41,902 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:55:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:55:42,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:55:42,715 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:55:42,737 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:55:42,738 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-04 12:55:42,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:55:42,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:55:42,738 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:55:42,739 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 10 states. [2018-10-04 12:55:43,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:55:43,459 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 12:55:43,460 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:55:43,460 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2018-10-04 12:55:43,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:55:43,461 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:55:43,461 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:55:43,461 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 8 [2018-10-04 12:55:43,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:55:43,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:55:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:55:43,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 12:55:43,467 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2018-10-04 12:55:43,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:55:43,467 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 12:55:43,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:55:43,468 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 12:55:43,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:55:43,468 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:55:43,468 INFO L375 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1] [2018-10-04 12:55:43,469 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:55:43,469 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:55:43,469 INFO L82 PathProgramCache]: Analyzing trace with hash 47323031, now seen corresponding path program 8 times [2018-10-04 12:55:43,469 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:55:43,469 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:55:43,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:43,470 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:55:43,470 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:55:43,483 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:55:43,484 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:55:43,484 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:55:43,499 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:56:05,981 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:56:05,981 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:56:05,985 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:56:06,520 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:56:06,552 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:56:06,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-04 12:56:06,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:56:06,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:56:06,554 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:56:06,554 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 11 states. [2018-10-04 12:56:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:56:06,777 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 12:56:06,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:56:06,780 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2018-10-04 12:56:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:56:06,781 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:56:06,781 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:56:06,782 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 9 [2018-10-04 12:56:06,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:56:06,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:56:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:56:06,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 12:56:06,788 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2018-10-04 12:56:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:56:06,788 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 12:56:06,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:56:06,789 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 12:56:06,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:56:06,789 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:56:06,789 INFO L375 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1] [2018-10-04 12:56:06,790 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:56:06,790 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:56:06,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1767155375, now seen corresponding path program 9 times [2018-10-04 12:56:06,790 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:56:06,790 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:56:06,791 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:06,791 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:56:06,792 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:56:06,805 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:56:06,805 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:56:06,805 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:56:06,818 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown