java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:36:38,243 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:36:38,245 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:36:38,257 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:36:38,257 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:36:38,258 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:36:38,260 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:36:38,261 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:36:38,263 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:36:38,263 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:36:38,268 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 12:36:38,268 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 12:36:38,269 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 12:36:38,270 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 12:36:38,274 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 12:36:38,275 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 12:36:38,276 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 12:36:38,277 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 12:36:38,279 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 12:36:38,281 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 12:36:38,282 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 12:36:38,283 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 12:36:38,286 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 12:36:38,299 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 12:36:38,327 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:36:38,328 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:36:38,328 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:36:38,329 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:36:38,329 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:36:38,330 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:36:38,330 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:36:38,330 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:36:38,330 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:36:38,331 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:36:38,332 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:36:38,332 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:36:38,332 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:36:38,332 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:36:38,332 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:36:38,333 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:36:38,334 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:36:38,334 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:36:38,334 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:36:38,334 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:36:38,335 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:36:38,335 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:36:38,335 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:36:38,335 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:36:38,335 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:36:38,336 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:36:38,336 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:36:38,336 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:36:38,337 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:36:38,337 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:36:38,401 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:36:38,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:36:38,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:36:38,419 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:36:38,420 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:36:38,420 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl [2018-10-04 12:36:38,421 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl' [2018-10-04 12:36:38,469 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:36:38,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:36:38,472 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:36:38,472 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:36:38,472 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:36:38,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:36:38" (1/1) ... [2018-10-04 12:36:38,505 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:36:38" (1/1) ... [2018-10-04 12:36:38,509 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 12:36:38,510 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 12:36:38,510 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 12:36:38,512 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:36:38,513 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:36:38,513 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:36:38,513 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:36:38,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:36:38" (1/1) ... [2018-10-04 12:36:38,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:36:38" (1/1) ... [2018-10-04 12:36:38,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:36:38" (1/1) ... [2018-10-04 12:36:38,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:36:38" (1/1) ... [2018-10-04 12:36:38,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:36:38" (1/1) ... [2018-10-04 12:36:38,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:36:38" (1/1) ... [2018-10-04 12:36:38,534 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:36:38" (1/1) ... [2018-10-04 12:36:38,535 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:36:38,536 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:36:38,536 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:36:38,536 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:36:38,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:36:38" (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 12:36:38,617 INFO L124 BoogieDeclarations]: Specification and implementation of procedure mult given in one single declaration [2018-10-04 12:36:38,617 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2018-10-04 12:36:38,618 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2018-10-04 12:36:38,686 WARN L632 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-10-04 12:36:38,836 INFO L338 CfgBuilder]: Using library mode [2018-10-04 12:36:38,837 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:36:38 BoogieIcfgContainer [2018-10-04 12:36:38,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:36:38,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:36:38,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:36:38,843 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:36:38,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:36:38" (1/2) ... [2018-10-04 12:36:38,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56cb4383 and model type Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:36:38, skipping insertion in model container [2018-10-04 12:36:38,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:36:38" (2/2) ... [2018-10-04 12:36:38,847 INFO L112 eAbstractionObserver]: Analyzing ICFG Mult1-Safe.bpl [2018-10-04 12:36:38,858 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:36:38,868 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:36:38,924 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:36:38,925 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:36:38,926 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:36:38,926 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:36:38,926 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:36:38,926 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:36:38,926 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:36:38,927 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:36:38,927 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:36:38,943 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 12:36:38,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:36:38,962 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:38,963 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:36:38,965 INFO L423 AbstractCegarLoop]: === Iteration 1 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:38,972 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:38,972 INFO L82 PathProgramCache]: Analyzing trace with hash 924708, now seen corresponding path program 1 times [2018-10-04 12:36:38,975 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:38,975 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:39,024 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:39,025 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:39,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:39,057 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:39,058 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:39,058 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 12:36:39,067 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:39,084 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:39,249 WARN L178 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2018-10-04 12:36:39,351 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 12:36:39,374 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:36:39,375 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:36:39,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:36:39,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:36:39,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:36:39,397 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 5 states. [2018-10-04 12:36:39,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:39,501 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 12:36:39,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:36:39,503 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-10-04 12:36:39,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:39,515 INFO L225 Difference]: With dead ends: 10 [2018-10-04 12:36:39,515 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 12:36:39,519 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:36:39,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 12:36:39,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 12:36:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 12:36:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 12:36:39,555 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-04 12:36:39,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:39,555 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 12:36:39,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:36:39,556 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 12:36:39,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 12:36:39,556 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:39,556 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 12:36:39,557 INFO L423 AbstractCegarLoop]: === Iteration 2 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:39,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:39,557 INFO L82 PathProgramCache]: Analyzing trace with hash 28663973, now seen corresponding path program 1 times [2018-10-04 12:36:39,558 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:39,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:39,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:39,559 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:39,559 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:39,567 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:39,567 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:39,567 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 12:36:39,582 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:39,593 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:39,688 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:39,688 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-10-04 12:36:39,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:36:39,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:36:39,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2018-10-04 12:36:39,691 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-04 12:36:39,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:39,883 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 12:36:39,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:36:39,885 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-04 12:36:39,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:39,886 INFO L225 Difference]: With dead ends: 9 [2018-10-04 12:36:39,886 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:36:39,888 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:36:39,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:36:39,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:36:39,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:36:39,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 12:36:39,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-04 12:36:39,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:39,894 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 12:36:39,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:36:39,894 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 12:36:39,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:36:39,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:39,895 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 12:36:39,895 INFO L423 AbstractCegarLoop]: === Iteration 3 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:39,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:39,896 INFO L82 PathProgramCache]: Analyzing trace with hash 888581188, now seen corresponding path program 2 times [2018-10-04 12:36:39,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:39,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:39,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:39,898 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:39,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:39,907 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:39,907 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:39,908 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 12:36:39,924 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:39,940 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:39,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:39,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:40,270 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:40,270 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-04 12:36:40,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:36:40,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:36:40,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2018-10-04 12:36:40,271 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-04 12:36:40,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:40,357 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 12:36:40,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:36:40,359 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-04 12:36:40,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:40,360 INFO L225 Difference]: With dead ends: 10 [2018-10-04 12:36:40,360 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 12:36:40,361 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:36:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 12:36:40,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 12:36:40,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 12:36:40,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 12:36:40,365 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-04 12:36:40,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:40,365 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 12:36:40,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:36:40,366 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 12:36:40,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 12:36:40,366 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:40,367 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2018-10-04 12:36:40,367 INFO L423 AbstractCegarLoop]: === Iteration 4 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:40,367 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:40,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1776211077, now seen corresponding path program 3 times [2018-10-04 12:36:40,368 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:40,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:40,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:40,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:40,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:40,377 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:40,377 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:40,378 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 12:36:40,385 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:40,395 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 12:36:40,396 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:40,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:40,611 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 12:36:40,632 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:40,633 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-04 12:36:40,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:36:40,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:36:40,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2018-10-04 12:36:40,634 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-04 12:36:40,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:40,724 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 12:36:40,724 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:36:40,725 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-04 12:36:40,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:40,725 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:36:40,726 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:36:40,726 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:36:40,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:36:40,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:36:40,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:36:40,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 12:36:40,731 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-04 12:36:40,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:40,732 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 12:36:40,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:36:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 12:36:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:36:40,732 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:40,733 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2018-10-04 12:36:40,733 INFO L423 AbstractCegarLoop]: === Iteration 5 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:40,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:40,733 INFO L82 PathProgramCache]: Analyzing trace with hash -772033436, now seen corresponding path program 4 times [2018-10-04 12:36:40,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:40,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:40,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:40,735 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:40,735 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:40,742 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:40,743 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:40,743 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 12:36:40,757 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:40,767 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:40,767 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:40,768 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:41,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:41,218 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:41,218 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-04 12:36:41,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:36:41,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:36:41,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2018-10-04 12:36:41,219 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-04 12:36:41,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:41,329 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 12:36:41,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:36:41,329 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-04 12:36:41,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:41,330 INFO L225 Difference]: With dead ends: 12 [2018-10-04 12:36:41,330 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 12:36:41,331 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:36:41,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 12:36:41,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 12:36:41,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 12:36:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 12:36:41,335 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-04 12:36:41,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:41,335 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 12:36:41,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:36:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 12:36:41,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:36:41,336 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:41,336 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1] [2018-10-04 12:36:41,336 INFO L423 AbstractCegarLoop]: === Iteration 6 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:41,337 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:41,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1836765285, now seen corresponding path program 5 times [2018-10-04 12:36:41,337 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:41,337 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:41,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:41,338 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:41,338 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:41,347 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:41,347 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:41,347 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 12:36:41,363 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:41,377 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 12:36:41,377 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:41,379 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:41,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:41,539 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-04 12:36:41,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:36:41,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:36:41,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2018-10-04 12:36:41,540 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-04 12:36:41,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:41,689 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 12:36:41,690 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:36:41,690 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-04 12:36:41,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:41,691 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:36:41,691 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:36:41,691 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:36:41,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:36:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:36:41,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:36:41,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 12:36:41,695 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-04 12:36:41,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:41,695 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 12:36:41,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:36:41,696 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 12:36:41,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:36:41,696 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:41,696 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2018-10-04 12:36:41,696 INFO L423 AbstractCegarLoop]: === Iteration 7 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:41,697 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1105147012, now seen corresponding path program 6 times [2018-10-04 12:36:41,697 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:41,697 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:41,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:41,698 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:41,698 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:41,707 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:41,707 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:41,708 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 12:36:41,718 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:41,734 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 12:36:41,734 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:41,736 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:41,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:41,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-04 12:36:41,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:36:41,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:36:41,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2018-10-04 12:36:41,984 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-04 12:36:42,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:42,190 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 12:36:42,190 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:36:42,190 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-04 12:36:42,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:42,192 INFO L225 Difference]: With dead ends: 14 [2018-10-04 12:36:42,192 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 12:36:42,193 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:36:42,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 12:36:42,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 12:36:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 12:36:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 12:36:42,196 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-04 12:36:42,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:42,197 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 12:36:42,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:36:42,197 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 12:36:42,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 12:36:42,197 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:42,198 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1] [2018-10-04 12:36:42,198 INFO L423 AbstractCegarLoop]: === Iteration 8 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:42,198 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:42,198 INFO L82 PathProgramCache]: Analyzing trace with hash -100182971, now seen corresponding path program 7 times [2018-10-04 12:36:42,198 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:42,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:42,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:42,200 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:42,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:42,208 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:42,208 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:42,209 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 12:36:42,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:42,240 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:42,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:42,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-04 12:36:42,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:36:42,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:36:42,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2018-10-04 12:36:42,455 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-04 12:36:42,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:42,579 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 12:36:42,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:36:42,580 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-04 12:36:42,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:42,581 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:36:42,581 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:36:42,582 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:36:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:36:42,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:36:42,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:36:42,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 12:36:42,587 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-04 12:36:42,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:42,587 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 12:36:42,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:36:42,588 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 12:36:42,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:36:42,588 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:42,588 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2018-10-04 12:36:42,589 INFO L423 AbstractCegarLoop]: === Iteration 9 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:42,589 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:42,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1189293220, now seen corresponding path program 8 times [2018-10-04 12:36:42,589 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:42,590 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:42,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:42,591 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:42,591 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:42,602 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:42,602 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:42,602 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 12:36:42,613 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:42,635 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:42,636 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:42,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:42,792 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:42,812 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:42,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-04 12:36:42,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:36:42,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:36:42,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2018-10-04 12:36:42,814 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-04 12:36:42,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:42,955 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 12:36:42,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:36:42,955 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-04 12:36:42,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:42,956 INFO L225 Difference]: With dead ends: 16 [2018-10-04 12:36:42,957 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 12:36:42,958 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:36:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 12:36:42,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 12:36:42,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:36:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 12:36:42,962 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-04 12:36:42,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:42,962 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 12:36:42,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:36:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 12:36:42,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 12:36:42,963 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:42,963 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1] [2018-10-04 12:36:42,964 INFO L423 AbstractCegarLoop]: === Iteration 10 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:42,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:42,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1786617819, now seen corresponding path program 9 times [2018-10-04 12:36:42,964 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:42,964 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:42,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:42,965 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:42,965 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:42,975 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:42,975 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:42,975 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 12:36:42,987 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:43,008 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 12:36:43,009 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:43,011 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:43,272 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:43,273 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-04 12:36:43,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:36:43,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:36:43,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2018-10-04 12:36:43,274 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-04 12:36:43,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:43,438 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 12:36:43,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:36:43,438 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-04 12:36:43,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:43,439 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:36:43,440 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:36:43,440 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:36:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:36:43,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:36:43,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:36:43,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 12:36:43,445 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-04 12:36:43,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:43,446 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 12:36:43,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:36:43,446 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 12:36:43,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:36:43,446 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:43,446 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2018-10-04 12:36:43,447 INFO L423 AbstractCegarLoop]: === Iteration 11 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:43,447 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:43,447 INFO L82 PathProgramCache]: Analyzing trace with hash 449420484, now seen corresponding path program 10 times [2018-10-04 12:36:43,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:43,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:43,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:43,448 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:43,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:43,457 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:43,457 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:43,458 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:36:43,470 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:43,498 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:43,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:43,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:43,842 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:43,868 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:43,868 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-04 12:36:43,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:36:43,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:36:43,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2018-10-04 12:36:43,869 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-04 12:36:44,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:44,045 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 12:36:44,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:36:44,046 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-04 12:36:44,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:44,047 INFO L225 Difference]: With dead ends: 18 [2018-10-04 12:36:44,047 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 12:36:44,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:36:44,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 12:36:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 12:36:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 12:36:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 12:36:44,053 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-04 12:36:44,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:44,053 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 12:36:44,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:36:44,054 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 12:36:44,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 12:36:44,054 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:44,054 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1] [2018-10-04 12:36:44,055 INFO L423 AbstractCegarLoop]: === Iteration 12 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:44,055 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:44,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1047131141, now seen corresponding path program 11 times [2018-10-04 12:36:44,055 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:44,055 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:44,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:44,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:44,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:44,066 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:44,066 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:44,067 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:36:44,084 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:44,130 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 12:36:44,131 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:44,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:44,586 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:44,586 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-04 12:36:44,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:36:44,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:36:44,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2018-10-04 12:36:44,601 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-04 12:36:44,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:44,905 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 12:36:44,906 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:36:44,906 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-04 12:36:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:44,907 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:36:44,907 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:36:44,908 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:36:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:36:44,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:36:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:36:44,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 12:36:44,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-04 12:36:44,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:44,913 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 12:36:44,913 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:36:44,913 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 12:36:44,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:36:44,913 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:44,913 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1] [2018-10-04 12:36:44,914 INFO L423 AbstractCegarLoop]: === Iteration 13 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:44,914 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:44,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1898674972, now seen corresponding path program 12 times [2018-10-04 12:36:44,914 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:44,914 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:44,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:44,915 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:44,915 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:44,924 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:44,924 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:44,924 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:36:44,935 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:44,974 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:36:44,974 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:44,976 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:45,460 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:45,460 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-04 12:36:45,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:36:45,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:36:45,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2018-10-04 12:36:45,462 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-04 12:36:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:45,846 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 12:36:45,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:36:45,846 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-04 12:36:45,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:45,847 INFO L225 Difference]: With dead ends: 20 [2018-10-04 12:36:45,847 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 12:36:45,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:36:45,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 12:36:45,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 12:36:45,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 12:36:45,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 12:36:45,852 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-04 12:36:45,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:45,852 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 12:36:45,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:36:45,853 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 12:36:45,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 12:36:45,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:45,853 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1] [2018-10-04 12:36:45,853 INFO L423 AbstractCegarLoop]: === Iteration 14 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:45,854 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:45,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1270616037, now seen corresponding path program 13 times [2018-10-04 12:36:45,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:45,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:45,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:45,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:45,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:45,863 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:45,864 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:45,864 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:36:45,874 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:45,935 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:46,218 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:46,239 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:46,239 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-04 12:36:46,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:36:46,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:36:46,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2018-10-04 12:36:46,240 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-04 12:36:46,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:46,767 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 12:36:46,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:36:46,767 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-04 12:36:46,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:46,768 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:36:46,768 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:36:46,769 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:36:46,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:36:46,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:36:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:36:46,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 12:36:46,772 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-04 12:36:46,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:46,773 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 12:36:46,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:36:46,773 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 12:36:46,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:36:46,773 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:46,773 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1] [2018-10-04 12:36:46,774 INFO L423 AbstractCegarLoop]: === Iteration 15 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:46,774 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:46,774 INFO L82 PathProgramCache]: Analyzing trace with hash 734389508, now seen corresponding path program 14 times [2018-10-04 12:36:46,774 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:46,774 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:46,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:46,775 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:46,775 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:46,785 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:46,785 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:46,785 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 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:36:46,804 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:46,861 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:46,861 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:46,863 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:47,261 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:47,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-04 12:36:47,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:36:47,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:36:47,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2018-10-04 12:36:47,262 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-04 12:36:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:47,599 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 12:36:47,599 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:36:47,599 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-04 12:36:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:47,600 INFO L225 Difference]: With dead ends: 22 [2018-10-04 12:36:47,600 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 12:36:47,601 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:36:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 12:36:47,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 12:36:47,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 12:36:47,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 12:36:47,606 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-04 12:36:47,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:47,606 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 12:36:47,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:36:47,606 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 12:36:47,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 12:36:47,606 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:47,606 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1] [2018-10-04 12:36:47,607 INFO L423 AbstractCegarLoop]: === Iteration 16 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:47,607 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:47,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1291236293, now seen corresponding path program 15 times [2018-10-04 12:36:47,607 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:47,607 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:47,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:47,608 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:47,608 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:47,617 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:47,618 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:47,618 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:36:47,639 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:47,745 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 12:36:47,746 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:47,749 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:49,298 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:49,319 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:49,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-04 12:36:49,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:36:49,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:36:49,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2018-10-04 12:36:49,321 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-04 12:36:49,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:49,820 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 12:36:49,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:36:49,821 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-04 12:36:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:49,821 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:36:49,821 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:36:49,822 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:36:49,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:36:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:36:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:36:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 12:36:49,827 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-04 12:36:49,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:49,827 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 12:36:49,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:36:49,828 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 12:36:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:36:49,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:49,828 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1] [2018-10-04 12:36:49,829 INFO L423 AbstractCegarLoop]: === Iteration 17 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:49,829 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:49,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1373617444, now seen corresponding path program 16 times [2018-10-04 12:36:49,829 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:49,829 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:49,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:49,830 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:49,830 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:49,839 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:49,839 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:49,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-04 12:36:49,864 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:36:49,950 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:49,950 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:49,952 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:50,263 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:50,263 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-04 12:36:50,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:36:50,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:36:50,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2018-10-04 12:36:50,264 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-04 12:36:50,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:50,635 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 12:36:50,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:36:50,636 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-04 12:36:50,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:50,636 INFO L225 Difference]: With dead ends: 24 [2018-10-04 12:36:50,637 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 12:36:50,637 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:36:50,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 12:36:50,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 12:36:50,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 12:36:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 12:36:50,643 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-04 12:36:50,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:50,643 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 12:36:50,643 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:36:50,643 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 12:36:50,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 12:36:50,644 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:50,644 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1] [2018-10-04 12:36:50,644 INFO L423 AbstractCegarLoop]: === Iteration 18 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:50,644 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:50,645 INFO L82 PathProgramCache]: Analyzing trace with hash -367534171, now seen corresponding path program 17 times [2018-10-04 12:36:50,645 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:50,645 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:50,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:50,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:50,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:50,656 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:50,656 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:50,656 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:36:50,669 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:36:50,768 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 12:36:50,768 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:50,771 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:51,262 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:51,262 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-04 12:36:51,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:36:51,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:36:51,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2018-10-04 12:36:51,263 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-04 12:36:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:51,638 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 12:36:51,639 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:36:51,639 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-04 12:36:51,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:51,640 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:36:51,640 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:36:51,642 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:36:51,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:36:51,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:36:51,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:36:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 12:36:51,648 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-04 12:36:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:51,648 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 12:36:51,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:36:51,648 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 12:36:51,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:36:51,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:51,649 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1] [2018-10-04 12:36:51,650 INFO L423 AbstractCegarLoop]: === Iteration 19 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:51,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:51,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1491340612, now seen corresponding path program 18 times [2018-10-04 12:36:51,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:51,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:51,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:51,651 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:51,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:51,660 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:51,661 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:51,661 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:36:51,676 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:36:51,807 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 12:36:51,808 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:51,810 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:52,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:52,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-04 12:36:52,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:36:52,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:36:52,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2018-10-04 12:36:52,431 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-04 12:36:52,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:52,845 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 12:36:52,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:36:52,845 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-04 12:36:52,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:52,846 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:36:52,847 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 12:36:52,847 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:36:52,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 12:36:52,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 12:36:52,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 12:36:52,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 12:36:52,852 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-04 12:36:52,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:52,852 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 12:36:52,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:36:52,852 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 12:36:52,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 12:36:52,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:52,853 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1] [2018-10-04 12:36:52,853 INFO L423 AbstractCegarLoop]: === Iteration 20 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:52,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:52,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1013083259, now seen corresponding path program 19 times [2018-10-04 12:36:52,854 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:52,854 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:52,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:52,855 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:52,855 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:52,863 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:52,863 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:52,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:36:52,885 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:36:53,029 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:53,430 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:53,430 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-04 12:36:53,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:36:53,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:36:53,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2018-10-04 12:36:53,431 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-04 12:36:54,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:54,068 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 12:36:54,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:36:54,070 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-04 12:36:54,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:54,071 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:36:54,071 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:36:54,072 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:36:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:36:54,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:36:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:36:54,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 12:36:54,077 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-04 12:36:54,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:54,077 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 12:36:54,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:36:54,077 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 12:36:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:36:54,078 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:54,078 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1] [2018-10-04 12:36:54,079 INFO L423 AbstractCegarLoop]: === Iteration 21 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:54,079 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:54,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1340811932, now seen corresponding path program 20 times [2018-10-04 12:36:54,079 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:54,079 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:54,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:54,080 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:36:54,080 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:54,088 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:54,088 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:54,089 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:36:54,111 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:36:54,269 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:36:54,269 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:54,272 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:54,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:54,791 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-04 12:36:54,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:36:54,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:36:54,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2018-10-04 12:36:54,792 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-04 12:36:55,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:55,275 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 12:36:55,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:36:55,276 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-04 12:36:55,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:55,277 INFO L225 Difference]: With dead ends: 28 [2018-10-04 12:36:55,277 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 12:36:55,278 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:36:55,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 12:36:55,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 12:36:55,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 12:36:55,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 12:36:55,284 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-04 12:36:55,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:55,284 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 12:36:55,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:36:55,284 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 12:36:55,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 12:36:55,285 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:55,285 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1] [2018-10-04 12:36:55,285 INFO L423 AbstractCegarLoop]: === Iteration 22 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:55,285 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:55,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1384501093, now seen corresponding path program 21 times [2018-10-04 12:36:55,286 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:55,286 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:55,286 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:55,286 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:55,287 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:55,295 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:55,295 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:55,295 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:36:55,306 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:36:55,488 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 12:36:55,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:55,491 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:56,008 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:56,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-04 12:36:56,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:36:56,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:36:56,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2018-10-04 12:36:56,010 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-04 12:36:57,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:57,094 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 12:36:57,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:36:57,096 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-04 12:36:57,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:57,097 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:36:57,097 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:36:57,098 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:36:57,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:36:57,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:36:57,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:36:57,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 12:36:57,102 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-04 12:36:57,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:57,102 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 12:36:57,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:36:57,103 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 12:36:57,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:36:57,103 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:57,103 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2018-10-04 12:36:57,103 INFO L423 AbstractCegarLoop]: === Iteration 23 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:57,104 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:57,104 INFO L82 PathProgramCache]: Analyzing trace with hash -30141052, now seen corresponding path program 22 times [2018-10-04 12:36:57,104 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:57,104 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:57,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:57,105 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:57,105 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:57,114 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:57,114 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:57,114 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:36:57,133 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:36:57,335 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:36:57,335 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:57,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:57,847 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:57,878 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:57,878 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-04 12:36:57,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:36:57,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:36:57,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2018-10-04 12:36:57,879 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-04 12:36:58,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:58,548 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 12:36:58,549 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:36:58,549 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-04 12:36:58,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:58,550 INFO L225 Difference]: With dead ends: 30 [2018-10-04 12:36:58,550 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 12:36:58,551 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:36:58,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 12:36:58,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 12:36:58,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 12:36:58,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 12:36:58,555 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-04 12:36:58,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:58,556 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 12:36:58,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:36:58,556 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 12:36:58,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 12:36:58,557 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:58,557 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1] [2018-10-04 12:36:58,557 INFO L423 AbstractCegarLoop]: === Iteration 24 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:58,557 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:58,557 INFO L82 PathProgramCache]: Analyzing trace with hash -934374587, now seen corresponding path program 23 times [2018-10-04 12:36:58,557 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:58,558 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:58,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:58,558 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:58,558 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:58,565 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:58,565 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:58,565 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-04 12:36:58,583 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:36:58,846 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 12:36:58,847 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:36:58,851 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:36:59,390 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:36:59,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:36:59,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-04 12:36:59,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:36:59,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:36:59,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2018-10-04 12:36:59,411 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-04 12:36:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:36:59,980 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 12:36:59,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:36:59,981 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-04 12:36:59,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:36:59,982 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:36:59,982 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:36:59,983 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:36:59,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:36:59,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:36:59,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:36:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 12:36:59,987 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-04 12:36:59,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:36:59,989 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 12:36:59,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:36:59,989 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 12:36:59,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:36:59,989 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:36:59,990 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1] [2018-10-04 12:36:59,990 INFO L423 AbstractCegarLoop]: === Iteration 25 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:36:59,990 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:36:59,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1099156900, now seen corresponding path program 24 times [2018-10-04 12:36:59,990 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:36:59,990 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:36:59,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:59,991 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:36:59,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:36:59,997 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:36:59,997 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:36:59,997 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:00,011 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:37:00,285 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:37:00,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:00,289 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:01,276 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:01,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-04 12:37:01,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:37:01,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:37:01,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2018-10-04 12:37:01,277 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-04 12:37:01,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:01,992 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 12:37:01,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:37:01,993 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-04 12:37:01,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:01,994 INFO L225 Difference]: With dead ends: 32 [2018-10-04 12:37:01,994 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 12:37:01,995 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:37:01,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 12:37:02,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 12:37:02,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 12:37:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 12:37:02,000 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-04 12:37:02,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:02,000 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 12:37:02,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:37:02,001 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 12:37:02,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 12:37:02,001 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:02,001 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1] [2018-10-04 12:37:02,001 INFO L423 AbstractCegarLoop]: === Iteration 26 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:02,002 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:02,002 INFO L82 PathProgramCache]: Analyzing trace with hash -285876443, now seen corresponding path program 25 times [2018-10-04 12:37:02,002 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:02,002 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:02,002 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:02,003 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:02,003 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:02,009 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:02,010 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:02,010 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:02,026 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:02,383 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:02,983 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:03,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:03,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-04 12:37:03,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:37:03,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:37:03,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2018-10-04 12:37:03,005 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-04 12:37:03,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:03,641 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 12:37:03,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:37:03,642 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-04 12:37:03,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:03,642 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:37:03,643 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:37:03,643 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:37:03,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:37:03,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:37:03,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:37:03,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 12:37:03,648 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-04 12:37:03,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:03,649 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 12:37:03,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:37:03,649 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 12:37:03,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:37:03,649 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:03,650 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1] [2018-10-04 12:37:03,650 INFO L423 AbstractCegarLoop]: === Iteration 27 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:03,650 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:03,650 INFO L82 PathProgramCache]: Analyzing trace with hash -272237116, now seen corresponding path program 26 times [2018-10-04 12:37:03,650 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:03,650 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:03,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:03,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:03,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:03,657 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:03,657 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:03,657 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:03,669 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:37:04,061 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:37:04,061 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:04,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:05,132 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:05,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-04 12:37:05,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:37:05,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:37:05,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2018-10-04 12:37:05,133 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-04 12:37:05,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:05,819 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 12:37:05,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:37:05,819 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-04 12:37:05,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:05,820 INFO L225 Difference]: With dead ends: 34 [2018-10-04 12:37:05,820 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 12:37:05,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:37:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 12:37:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 12:37:05,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 12:37:05,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 12:37:05,827 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-04 12:37:05,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:05,828 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 12:37:05,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:37:05,828 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 12:37:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 12:37:05,829 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:05,830 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1] [2018-10-04 12:37:05,830 INFO L423 AbstractCegarLoop]: === Iteration 28 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:05,830 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:05,830 INFO L82 PathProgramCache]: Analyzing trace with hash 150582021, now seen corresponding path program 27 times [2018-10-04 12:37:05,830 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:05,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:05,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:05,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:05,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:05,838 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:05,838 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:05,839 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:05,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:37:06,317 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 12:37:06,317 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:06,320 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:06,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:06,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-04 12:37:06,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:37:06,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:37:06,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2018-10-04 12:37:06,927 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-04 12:37:07,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:07,791 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 12:37:07,793 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:37:07,793 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-04 12:37:07,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:07,794 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:37:07,794 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:37:07,794 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:37:07,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:37:07,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:37:07,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:37:07,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 12:37:07,799 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-04 12:37:07,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:07,799 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 12:37:07,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:37:07,799 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 12:37:07,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:37:07,800 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:07,800 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1] [2018-10-04 12:37:07,800 INFO L423 AbstractCegarLoop]: === Iteration 29 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:07,801 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:07,801 INFO L82 PathProgramCache]: Analyzing trace with hash 373073380, now seen corresponding path program 28 times [2018-10-04 12:37:07,801 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:07,801 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:07,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:07,802 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:07,802 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:07,813 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:07,814 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:07,814 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:07,824 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:37:08,333 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:37:08,333 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:08,338 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:08,939 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:08,959 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:08,959 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-04 12:37:08,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:37:08,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:37:08,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2018-10-04 12:37:08,960 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-04 12:37:09,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:09,736 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 12:37:09,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:37:09,737 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-04 12:37:09,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:09,738 INFO L225 Difference]: With dead ends: 36 [2018-10-04 12:37:09,738 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 12:37:09,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:37:09,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 12:37:09,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 12:37:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 12:37:09,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 12:37:09,744 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-04 12:37:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:09,744 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 12:37:09,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:37:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 12:37:09,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 12:37:09,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:09,745 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1] [2018-10-04 12:37:09,745 INFO L423 AbstractCegarLoop]: === Iteration 30 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:09,745 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:09,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1319629083, now seen corresponding path program 29 times [2018-10-04 12:37:09,745 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:09,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:09,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:09,746 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:09,746 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:09,752 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:09,752 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:09,752 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:09,765 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:37:10,268 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 12:37:10,268 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:10,273 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:11,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:11,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-04 12:37:11,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:37:11,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:37:11,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2018-10-04 12:37:11,016 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-04 12:37:11,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:11,839 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 12:37:11,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:37:11,839 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-04 12:37:11,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:11,840 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:37:11,840 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:37:11,841 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:37:11,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:37:11,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:37:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:37:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 12:37:11,846 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-04 12:37:11,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:11,847 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 12:37:11,847 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:37:11,847 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 12:37:11,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:37:11,847 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:11,847 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1] [2018-10-04 12:37:11,848 INFO L423 AbstractCegarLoop]: === Iteration 31 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:11,848 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:11,848 INFO L82 PathProgramCache]: Analyzing trace with hash 2041169412, now seen corresponding path program 30 times [2018-10-04 12:37:11,848 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:11,848 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:11,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:11,849 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:11,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:11,855 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:11,855 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:11,855 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:11,871 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:37:12,425 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 12:37:12,426 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:12,429 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:13,381 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:13,401 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:13,401 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-04 12:37:13,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:37:13,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:37:13,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2018-10-04 12:37:13,402 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-04 12:37:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:14,282 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 12:37:14,282 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:37:14,282 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-04 12:37:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:14,283 INFO L225 Difference]: With dead ends: 38 [2018-10-04 12:37:14,283 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 12:37:14,284 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:37:14,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 12:37:14,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 12:37:14,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 12:37:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 12:37:14,289 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-04 12:37:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:14,289 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 12:37:14,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:37:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 12:37:14,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 12:37:14,290 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:14,290 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1] [2018-10-04 12:37:14,290 INFO L423 AbstractCegarLoop]: === Iteration 32 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:14,291 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:14,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1148259643, now seen corresponding path program 31 times [2018-10-04 12:37:14,291 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:14,291 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:14,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:14,292 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:14,292 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:14,298 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:14,298 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:14,298 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:14,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:14,956 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:15,873 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:15,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:15,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-04 12:37:15,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:37:15,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:37:15,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2018-10-04 12:37:15,893 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-04 12:37:16,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:16,815 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 12:37:16,815 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:37:16,816 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-04 12:37:16,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:16,816 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:37:16,816 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:37:16,817 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:37:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:37:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:37:16,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:37:16,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 12:37:16,822 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-04 12:37:16,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:16,823 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 12:37:16,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:37:16,823 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 12:37:16,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:37:16,823 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:16,823 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1] [2018-10-04 12:37:16,824 INFO L423 AbstractCegarLoop]: === Iteration 33 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:16,824 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:16,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1236312540, now seen corresponding path program 32 times [2018-10-04 12:37:16,824 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:16,824 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:16,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:16,825 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:16,825 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:16,830 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:16,831 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:16,831 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:16,845 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:37:17,561 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:37:17,562 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:17,569 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:18,495 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:18,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-04 12:37:18,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:37:18,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:37:18,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2018-10-04 12:37:18,496 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-04 12:37:19,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:19,480 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-04 12:37:19,481 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:37:19,481 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-04 12:37:19,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:19,482 INFO L225 Difference]: With dead ends: 40 [2018-10-04 12:37:19,482 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 12:37:19,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:37:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 12:37:19,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 12:37:19,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 12:37:19,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 12:37:19,487 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-04 12:37:19,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:19,487 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 12:37:19,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:37:19,487 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 12:37:19,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 12:37:19,488 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:19,488 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1] [2018-10-04 12:37:19,488 INFO L423 AbstractCegarLoop]: === Iteration 34 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:19,488 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:19,488 INFO L82 PathProgramCache]: Analyzing trace with hash 329014949, now seen corresponding path program 33 times [2018-10-04 12:37:19,488 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:19,488 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:19,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:19,489 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:19,489 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:19,495 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:19,495 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:19,496 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:19,512 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:37:20,230 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 12:37:20,230 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:20,233 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:21,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:21,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-04 12:37:21,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:37:21,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:37:21,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2018-10-04 12:37:21,162 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-04 12:37:22,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:22,196 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 12:37:22,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:37:22,197 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-04 12:37:22,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:22,197 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:37:22,198 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:37:22,199 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:37:22,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:37:22,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:37:22,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:37:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 12:37:22,204 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-04 12:37:22,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:22,204 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 12:37:22,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:37:22,204 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 12:37:22,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:37:22,205 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:22,205 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1] [2018-10-04 12:37:22,205 INFO L423 AbstractCegarLoop]: === Iteration 35 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:22,205 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:22,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1609526852, now seen corresponding path program 34 times [2018-10-04 12:37:22,205 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:22,206 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:22,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:22,206 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:22,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:22,212 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:22,212 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:22,212 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:22,224 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:37:22,997 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:37:22,997 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:23,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:23,842 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:23,842 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-04 12:37:23,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:37:23,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:37:23,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2018-10-04 12:37:23,843 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-04 12:37:24,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:24,995 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-04 12:37:24,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:37:24,996 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-04 12:37:24,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:24,997 INFO L225 Difference]: With dead ends: 42 [2018-10-04 12:37:24,997 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 12:37:24,998 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:37:24,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 12:37:25,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 12:37:25,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 12:37:25,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 12:37:25,003 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-04 12:37:25,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:25,004 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 12:37:25,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:37:25,004 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 12:37:25,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 12:37:25,004 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:25,004 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1] [2018-10-04 12:37:25,005 INFO L423 AbstractCegarLoop]: === Iteration 36 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:25,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:25,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1644277115, now seen corresponding path program 35 times [2018-10-04 12:37:25,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:25,005 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:25,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:25,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:25,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:25,012 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:25,012 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:25,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:25,027 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:37:26,293 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 12:37:26,293 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:26,300 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:27,647 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:27,667 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:27,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-04 12:37:27,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:37:27,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:37:27,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2018-10-04 12:37:27,668 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-04 12:37:28,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:28,845 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 12:37:28,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:37:28,846 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-04 12:37:28,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:28,847 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:37:28,847 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:37:28,848 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:37:28,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:37:28,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:37:28,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:37:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 12:37:28,852 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-04 12:37:28,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:28,852 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 12:37:28,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:37:28,852 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 12:37:28,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:37:28,853 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:28,853 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1] [2018-10-04 12:37:28,853 INFO L423 AbstractCegarLoop]: === Iteration 37 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:28,853 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:28,853 INFO L82 PathProgramCache]: Analyzing trace with hash 567015012, now seen corresponding path program 36 times [2018-10-04 12:37:28,853 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:28,853 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:28,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:28,854 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:28,854 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:28,861 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:28,861 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:28,861 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:28,871 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:37:29,616 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:37:29,617 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:29,621 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:30,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:30,572 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-04 12:37:30,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:37:30,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:37:30,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2018-10-04 12:37:30,573 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-04 12:37:31,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:31,810 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-04 12:37:31,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:37:31,811 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-04 12:37:31,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:31,812 INFO L225 Difference]: With dead ends: 44 [2018-10-04 12:37:31,812 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 12:37:31,813 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:37:31,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 12:37:31,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 12:37:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 12:37:31,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 12:37:31,817 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-04 12:37:31,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:31,817 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 12:37:31,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:37:31,817 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 12:37:31,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 12:37:31,818 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:31,818 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1] [2018-10-04 12:37:31,818 INFO L423 AbstractCegarLoop]: === Iteration 38 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:31,818 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:31,818 INFO L82 PathProgramCache]: Analyzing trace with hash 397594213, now seen corresponding path program 37 times [2018-10-04 12:37:31,818 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:31,819 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:31,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:31,819 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:31,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:31,825 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:31,825 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:31,825 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:31,842 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:32,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:32,870 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:33,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:33,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-04 12:37:33,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:37:33,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:37:33,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2018-10-04 12:37:33,990 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-04 12:37:35,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:35,313 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 12:37:35,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:37:35,314 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-04 12:37:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:35,315 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:37:35,315 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:37:35,316 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:37:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:37:35,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:37:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:37:35,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 12:37:35,321 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-04 12:37:35,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:35,321 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 12:37:35,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:37:35,322 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 12:37:35,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:37:35,322 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:35,322 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1] [2018-10-04 12:37:35,322 INFO L423 AbstractCegarLoop]: === Iteration 39 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:35,323 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:35,323 INFO L82 PathProgramCache]: Analyzing trace with hash -559483260, now seen corresponding path program 38 times [2018-10-04 12:37:35,323 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:35,323 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:35,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:35,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:35,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:35,330 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:35,330 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:35,330 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:35,343 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:37:36,325 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:37:36,325 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:36,331 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:37,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:37,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-04 12:37:37,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:37:37,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:37:37,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2018-10-04 12:37:37,373 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-04 12:37:38,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:38,726 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-04 12:37:38,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:37:38,727 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-04 12:37:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:38,727 INFO L225 Difference]: With dead ends: 46 [2018-10-04 12:37:38,727 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 12:37:38,729 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:37:38,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 12:37:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 12:37:38,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 12:37:38,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 12:37:38,732 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-04 12:37:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:38,732 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 12:37:38,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:37:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 12:37:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 12:37:38,733 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:38,733 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1] [2018-10-04 12:37:38,733 INFO L423 AbstractCegarLoop]: === Iteration 40 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:38,733 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:38,733 INFO L82 PathProgramCache]: Analyzing trace with hash -164113851, now seen corresponding path program 39 times [2018-10-04 12:37:38,734 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:38,734 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:38,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:38,734 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:38,734 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:38,740 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:38,740 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:38,740 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:38,762 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:37:39,970 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 12:37:39,971 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:39,975 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:41,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:41,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-04 12:37:41,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:37:41,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:37:41,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2018-10-04 12:37:41,072 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-04 12:37:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:42,475 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 12:37:42,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:37:42,475 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-04 12:37:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:42,476 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:37:42,476 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 12:37:42,477 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=1805, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:37:42,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 12:37:42,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 12:37:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:37:42,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 12:37:42,484 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-04 12:37:42,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:42,484 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 12:37:42,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:37:42,484 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 12:37:42,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:37:42,484 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:42,484 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1] [2018-10-04 12:37:42,485 INFO L423 AbstractCegarLoop]: === Iteration 41 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:42,485 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:42,485 INFO L82 PathProgramCache]: Analyzing trace with hash -792564060, now seen corresponding path program 40 times [2018-10-04 12:37:42,485 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:42,485 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:42,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:42,486 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:42,486 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:42,491 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:42,492 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:42,492 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:42,507 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:37:44,042 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:37:44,042 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:44,051 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:45,213 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:45,234 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:45,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-04 12:37:45,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:37:45,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:37:45,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2018-10-04 12:37:45,236 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-04 12:37:46,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:46,703 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-04 12:37:46,703 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:37:46,704 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-04 12:37:46,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:46,704 INFO L225 Difference]: With dead ends: 48 [2018-10-04 12:37:46,705 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 12:37:46,706 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=89, Invalid=1891, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:37:46,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 12:37:46,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 12:37:46,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 12:37:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 12:37:46,709 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-04 12:37:46,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:46,709 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 12:37:46,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:37:46,710 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 12:37:46,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 12:37:46,710 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:46,710 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1] [2018-10-04 12:37:46,710 INFO L423 AbstractCegarLoop]: === Iteration 42 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:46,710 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:46,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1200315941, now seen corresponding path program 41 times [2018-10-04 12:37:46,711 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:46,711 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:46,711 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:46,712 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:46,712 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:46,718 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:46,718 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:46,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-04 12:37:46,731 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:48,327 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 12:37:48,327 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:48,335 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:49,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:49,475 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-04 12:37:49,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:37:49,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:37:49,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2018-10-04 12:37:49,476 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-04 12:37:50,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:50,997 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 12:37:50,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:37:50,998 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-04 12:37:50,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:50,998 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:37:50,998 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:37:51,000 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=91, Invalid=1979, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:37:51,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:37:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:37:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:37:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 12:37:51,004 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-04 12:37:51,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:51,004 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 12:37:51,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:37:51,004 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 12:37:51,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:37:51,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:51,005 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1] [2018-10-04 12:37:51,005 INFO L423 AbstractCegarLoop]: === Iteration 43 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:51,005 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:51,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1444913468, now seen corresponding path program 42 times [2018-10-04 12:37:51,005 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:51,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:51,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:51,006 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:51,006 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:51,012 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:51,012 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:51,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:51,025 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:37:52,827 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 12:37:52,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:37:52,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:54,038 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:54,058 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:54,058 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-04 12:37:54,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 12:37:54,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 12:37:54,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2018-10-04 12:37:54,059 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-04 12:37:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:37:55,661 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-04 12:37:55,662 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 12:37:55,662 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-04 12:37:55,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:37:55,663 INFO L225 Difference]: With dead ends: 50 [2018-10-04 12:37:55,663 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 12:37:55,664 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=93, Invalid=2069, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:37:55,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 12:37:55,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 12:37:55,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 12:37:55,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 12:37:55,667 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-04 12:37:55,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:37:55,668 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 12:37:55,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 12:37:55,668 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 12:37:55,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 12:37:55,668 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:37:55,668 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1] [2018-10-04 12:37:55,668 INFO L423 AbstractCegarLoop]: === Iteration 44 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:37:55,669 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:37:55,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1842646523, now seen corresponding path program 43 times [2018-10-04 12:37:55,669 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:37:55,669 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:37:55,669 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:55,670 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:37:55,670 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:37:55,675 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:37:55,675 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:37:55,675 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:37:55,695 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:37:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:37:57,302 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:37:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:37:58,569 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:37:58,569 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-04 12:37:58,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 12:37:58,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 12:37:58,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=2071, Unknown=0, NotChecked=0, Total=2162 [2018-10-04 12:37:58,570 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-04 12:38:00,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:00,239 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 12:38:00,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 12:38:00,239 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-04 12:38:00,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:00,240 INFO L225 Difference]: With dead ends: 51 [2018-10-04 12:38:00,240 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 12:38:00,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=95, Invalid=2161, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:38:00,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 12:38:00,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 12:38:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 12:38:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 12:38:00,245 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-04 12:38:00,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:00,245 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 12:38:00,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 12:38:00,245 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 12:38:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 12:38:00,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:00,246 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1] [2018-10-04 12:38:00,246 INFO L423 AbstractCegarLoop]: === Iteration 45 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:38:00,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:00,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1287469340, now seen corresponding path program 44 times [2018-10-04 12:38:00,246 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:00,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:00,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:00,247 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:38:00,247 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:00,253 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:38:00,253 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:38:00,253 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:38:00,268 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:38:01,986 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:38:01,986 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:01,997 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:03,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:38:03,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-04 12:38:03,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 12:38:03,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 12:38:03,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2018-10-04 12:38:03,284 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-04 12:38:05,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:05,029 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-04 12:38:05,029 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 12:38:05,029 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-04 12:38:05,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:05,030 INFO L225 Difference]: With dead ends: 52 [2018-10-04 12:38:05,030 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 12:38:05,031 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=97, Invalid=2255, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:38:05,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 12:38:05,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 12:38:05,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 12:38:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 12:38:05,036 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-04 12:38:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:05,036 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 12:38:05,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 12:38:05,037 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 12:38:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 12:38:05,037 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:05,037 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1] [2018-10-04 12:38:05,037 INFO L423 AbstractCegarLoop]: === Iteration 46 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:38:05,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:05,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1256845851, now seen corresponding path program 45 times [2018-10-04 12:38:05,038 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:05,038 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:05,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:05,039 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:05,039 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:05,045 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:38:05,045 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:38:05,045 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:38:05,054 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:38:07,172 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 12:38:07,172 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:07,177 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:08,575 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:38:08,575 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-04 12:38:08,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 12:38:08,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 12:38:08,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2257, Unknown=0, NotChecked=0, Total=2352 [2018-10-04 12:38:08,576 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-04 12:38:10,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:10,389 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 12:38:10,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 12:38:10,390 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-04 12:38:10,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:10,390 INFO L225 Difference]: With dead ends: 53 [2018-10-04 12:38:10,391 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 12:38:10,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=99, Invalid=2351, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:38:10,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 12:38:10,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 12:38:10,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 12:38:10,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 12:38:10,396 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-04 12:38:10,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:10,396 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 12:38:10,396 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 12:38:10,396 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 12:38:10,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 12:38:10,397 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:10,397 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2018-10-04 12:38:10,397 INFO L423 AbstractCegarLoop]: === Iteration 47 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:38:10,397 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:10,397 INFO L82 PathProgramCache]: Analyzing trace with hash -307517692, now seen corresponding path program 46 times [2018-10-04 12:38:10,397 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:10,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:10,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:10,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:10,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:10,404 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:38:10,404 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:38:10,404 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:38:10,420 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:38:12,826 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:38:12,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:12,836 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:14,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:38:14,271 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-04 12:38:14,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 12:38:14,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 12:38:14,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2018-10-04 12:38:14,272 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-04 12:38:16,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:16,155 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-04 12:38:16,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 12:38:16,156 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-04 12:38:16,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:16,157 INFO L225 Difference]: With dead ends: 54 [2018-10-04 12:38:16,157 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 12:38:16,158 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=101, Invalid=2449, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:38:16,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 12:38:16,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 12:38:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 12:38:16,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 12:38:16,163 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-04 12:38:16,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:16,163 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 12:38:16,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 12:38:16,163 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 12:38:16,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 12:38:16,164 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:16,164 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1] [2018-10-04 12:38:16,164 INFO L423 AbstractCegarLoop]: === Iteration 48 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:38:16,164 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:16,164 INFO L82 PathProgramCache]: Analyzing trace with hash -943115835, now seen corresponding path program 47 times [2018-10-04 12:38:16,164 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:16,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:16,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:16,165 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:16,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:16,169 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:38:16,169 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:38:16,170 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:38:16,180 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:38:18,850 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 12:38:18,851 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:18,861 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:20,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:20,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:38:20,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-04 12:38:20,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 12:38:20,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 12:38:20,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2451, Unknown=0, NotChecked=0, Total=2550 [2018-10-04 12:38:20,288 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-04 12:38:22,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:22,243 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 12:38:22,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 12:38:22,243 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-04 12:38:22,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:22,244 INFO L225 Difference]: With dead ends: 55 [2018-10-04 12:38:22,244 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 12:38:22,245 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=103, Invalid=2549, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:38:22,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 12:38:22,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 12:38:22,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 12:38:22,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 12:38:22,250 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-04 12:38:22,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:22,250 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 12:38:22,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 12:38:22,251 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 12:38:22,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 12:38:22,251 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:22,251 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1] [2018-10-04 12:38:22,251 INFO L423 AbstractCegarLoop]: === Iteration 49 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:38:22,252 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:22,252 INFO L82 PathProgramCache]: Analyzing trace with hash 828178212, now seen corresponding path program 48 times [2018-10-04 12:38:22,252 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:22,252 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:22,252 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:22,253 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:22,253 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:22,259 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:38:22,259 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:38:22,259 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:38:22,274 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:38:25,024 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 12:38:25,024 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:25,030 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:26,506 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:38:26,506 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-04 12:38:26,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 12:38:26,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 12:38:26,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2018-10-04 12:38:26,507 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-04 12:38:28,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:28,564 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-04 12:38:28,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 12:38:28,564 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-04 12:38:28,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:28,565 INFO L225 Difference]: With dead ends: 56 [2018-10-04 12:38:28,565 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 12:38:28,566 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=105, Invalid=2651, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:38:28,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 12:38:28,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 12:38:28,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 12:38:28,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 12:38:28,570 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-04 12:38:28,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:28,571 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 12:38:28,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 12:38:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 12:38:28,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 12:38:28,571 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:28,571 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1] [2018-10-04 12:38:28,572 INFO L423 AbstractCegarLoop]: === Iteration 50 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:38:28,572 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:28,572 INFO L82 PathProgramCache]: Analyzing trace with hash -96281179, now seen corresponding path program 49 times [2018-10-04 12:38:28,572 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:28,572 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:28,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:28,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:28,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:28,578 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:38:28,578 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:38:28,578 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2018-10-04 12:38:28,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:38:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:38:31,176 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:32,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:32,838 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:38:32,838 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-04 12:38:32,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 12:38:32,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 12:38:32,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2653, Unknown=0, NotChecked=0, Total=2756 [2018-10-04 12:38:32,839 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-04 12:38:34,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:34,958 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 12:38:34,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 12:38:34,960 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-04 12:38:34,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:34,961 INFO L225 Difference]: With dead ends: 57 [2018-10-04 12:38:34,961 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 12:38:34,962 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=107, Invalid=2755, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:38:34,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 12:38:34,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 12:38:34,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 12:38:34,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 12:38:34,968 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-04 12:38:34,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:34,968 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 12:38:34,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 12:38:34,968 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 12:38:34,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 12:38:34,969 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:34,969 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1] [2018-10-04 12:38:34,969 INFO L423 AbstractCegarLoop]: === Iteration 51 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:38:34,969 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:34,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1310248772, now seen corresponding path program 50 times [2018-10-04 12:38:34,970 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:34,970 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:34,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:34,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:38:34,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:34,976 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:38:34,976 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:38:34,977 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:38:34,989 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:38:37,660 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:38:37,660 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:37,672 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:39,281 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:38:39,281 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-04 12:38:39,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 12:38:39,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 12:38:39,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2018-10-04 12:38:39,282 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-04 12:38:41,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:41,499 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-04 12:38:41,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 12:38:41,500 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-04 12:38:41,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:41,501 INFO L225 Difference]: With dead ends: 58 [2018-10-04 12:38:41,501 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 12:38:41,502 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=109, Invalid=2861, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:38:41,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 12:38:41,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 12:38:41,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 12:38:41,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 12:38:41,507 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-04 12:38:41,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:41,507 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 12:38:41,507 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 12:38:41,507 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 12:38:41,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 12:38:41,508 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:41,508 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1] [2018-10-04 12:38:41,508 INFO L423 AbstractCegarLoop]: === Iteration 52 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:38:41,508 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:41,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1963004293, now seen corresponding path program 51 times [2018-10-04 12:38:41,508 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:41,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:41,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:41,509 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:41,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:41,515 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:38:41,516 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:38:41,516 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:38:41,538 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:38:44,792 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 12:38:44,792 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:44,798 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:46,419 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:38:46,419 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-04 12:38:46,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 12:38:46,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 12:38:46,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2863, Unknown=0, NotChecked=0, Total=2970 [2018-10-04 12:38:46,421 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-04 12:38:48,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:48,756 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 12:38:48,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 12:38:48,757 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-04 12:38:48,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:48,757 INFO L225 Difference]: With dead ends: 59 [2018-10-04 12:38:48,758 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 12:38:48,758 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=111, Invalid=2969, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:38:48,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 12:38:48,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 12:38:48,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 12:38:48,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 12:38:48,763 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-04 12:38:48,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:48,763 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 12:38:48,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 12:38:48,763 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 12:38:48,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 12:38:48,763 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:48,764 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1] [2018-10-04 12:38:48,764 INFO L423 AbstractCegarLoop]: === Iteration 53 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:38:48,764 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:48,764 INFO L82 PathProgramCache]: Analyzing trace with hash 723588964, now seen corresponding path program 52 times [2018-10-04 12:38:48,764 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:48,764 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:48,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:48,765 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:48,765 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:48,771 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:38:48,771 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:38:48,771 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:38:48,780 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:38:52,165 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:38:52,165 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:38:52,178 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:38:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:38:53,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:38:53,874 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-04 12:38:53,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 12:38:53,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 12:38:53,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2018-10-04 12:38:53,875 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-04 12:38:56,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:38:56,249 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-04 12:38:56,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 12:38:56,250 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-04 12:38:56,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:38:56,251 INFO L225 Difference]: With dead ends: 60 [2018-10-04 12:38:56,251 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 12:38:56,252 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=113, Invalid=3079, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:38:56,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 12:38:56,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 12:38:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 12:38:56,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 12:38:56,256 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-04 12:38:56,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:38:56,256 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 12:38:56,256 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 12:38:56,256 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 12:38:56,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 12:38:56,257 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:38:56,257 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1] [2018-10-04 12:38:56,257 INFO L423 AbstractCegarLoop]: === Iteration 54 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:38:56,257 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:38:56,257 INFO L82 PathProgramCache]: Analyzing trace with hash 956419429, now seen corresponding path program 53 times [2018-10-04 12:38:56,257 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:38:56,257 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:38:56,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:56,258 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:38:56,258 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:38:56,263 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:38:56,263 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:38:56,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:38:56,270 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:39:00,286 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 12:39:00,286 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:00,299 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:02,043 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:39:02,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-04 12:39:02,043 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 12:39:02,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 12:39:02,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=3081, Unknown=0, NotChecked=0, Total=3192 [2018-10-04 12:39:02,044 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-04 12:39:04,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:04,493 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 12:39:04,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 12:39:04,493 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-04 12:39:04,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:04,494 INFO L225 Difference]: With dead ends: 61 [2018-10-04 12:39:04,494 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 12:39:04,495 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=3191, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:39:04,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 12:39:04,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 12:39:04,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 12:39:04,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 12:39:04,499 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-04 12:39:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:04,500 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 12:39:04,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 12:39:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 12:39:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 12:39:04,500 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:04,500 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1] [2018-10-04 12:39:04,500 INFO L423 AbstractCegarLoop]: === Iteration 55 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:39:04,500 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:04,501 INFO L82 PathProgramCache]: Analyzing trace with hash -415770748, now seen corresponding path program 54 times [2018-10-04 12:39:04,501 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:04,501 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:04,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:04,501 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:04,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:04,507 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:39:04,507 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:39:04,507 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:39:04,523 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:39:08,884 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 12:39:08,884 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:08,892 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:10,684 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:39:10,684 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-04 12:39:10,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 12:39:10,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 12:39:10,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2018-10-04 12:39:10,685 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-04 12:39:13,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:13,239 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-04 12:39:13,239 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 12:39:13,239 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-04 12:39:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:13,240 INFO L225 Difference]: With dead ends: 62 [2018-10-04 12:39:13,240 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 12:39:13,241 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=117, Invalid=3305, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:39:13,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 12:39:13,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 12:39:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 12:39:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 12:39:13,245 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-04 12:39:13,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:13,245 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 12:39:13,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 12:39:13,246 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 12:39:13,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 12:39:13,246 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:13,246 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1] [2018-10-04 12:39:13,246 INFO L423 AbstractCegarLoop]: === Iteration 56 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:39:13,246 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:13,246 INFO L82 PathProgramCache]: Analyzing trace with hash -3993275, now seen corresponding path program 55 times [2018-10-04 12:39:13,247 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:13,247 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:13,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:13,248 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:13,248 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:13,255 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:39:13,255 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:39:13,255 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:39:13,274 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:39:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:39:17,046 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:19,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:39:19,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-04 12:39:19,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 12:39:19,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 12:39:19,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=3307, Unknown=0, NotChecked=0, Total=3422 [2018-10-04 12:39:19,016 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-04 12:39:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:21,633 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 12:39:21,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 12:39:21,634 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-04 12:39:21,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:21,635 INFO L225 Difference]: With dead ends: 63 [2018-10-04 12:39:21,635 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 12:39:21,636 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=119, Invalid=3421, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:39:21,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 12:39:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 12:39:21,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 12:39:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 12:39:21,641 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-04 12:39:21,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:21,641 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 12:39:21,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 12:39:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 12:39:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 12:39:21,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:21,642 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1] [2018-10-04 12:39:21,642 INFO L423 AbstractCegarLoop]: === Iteration 57 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:39:21,642 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:21,642 INFO L82 PathProgramCache]: Analyzing trace with hash -123793500, now seen corresponding path program 56 times [2018-10-04 12:39:21,642 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:21,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:21,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:21,643 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:39:21,643 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:21,649 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:39:21,649 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:39:21,649 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:39:21,659 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:39:25,508 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:39:25,509 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:25,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:27,532 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:39:27,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-04 12:39:27,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 12:39:27,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 12:39:27,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2018-10-04 12:39:27,533 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-04 12:39:30,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:30,246 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-04 12:39:30,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 12:39:30,247 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-04 12:39:30,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:30,248 INFO L225 Difference]: With dead ends: 64 [2018-10-04 12:39:30,248 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 12:39:30,249 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=121, Invalid=3539, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 12:39:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 12:39:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 12:39:30,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 12:39:30,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 12:39:30,255 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-04 12:39:30,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:30,255 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 12:39:30,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 12:39:30,255 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 12:39:30,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 12:39:30,255 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:30,256 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1] [2018-10-04 12:39:30,256 INFO L423 AbstractCegarLoop]: === Iteration 58 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:39:30,256 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:30,256 INFO L82 PathProgramCache]: Analyzing trace with hash 457366821, now seen corresponding path program 57 times [2018-10-04 12:39:30,256 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:30,256 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:30,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:30,257 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:30,257 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:30,263 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:39:30,263 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:39:30,263 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:39:30,281 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:39:35,512 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 12:39:35,512 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:35,520 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:37,801 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:39:37,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-04 12:39:37,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 12:39:37,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 12:39:37,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=3541, Unknown=0, NotChecked=0, Total=3660 [2018-10-04 12:39:37,802 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-04 12:39:40,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:40,613 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 12:39:40,614 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 12:39:40,614 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-04 12:39:40,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:40,615 INFO L225 Difference]: With dead ends: 65 [2018-10-04 12:39:40,615 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 12:39:40,615 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=123, Invalid=3659, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:39:40,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 12:39:40,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 12:39:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 12:39:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 12:39:40,620 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-04 12:39:40,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:40,620 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 12:39:40,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 12:39:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 12:39:40,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 12:39:40,621 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:40,621 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1] [2018-10-04 12:39:40,621 INFO L423 AbstractCegarLoop]: === Iteration 59 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:39:40,621 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:40,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1293467588, now seen corresponding path program 58 times [2018-10-04 12:39:40,622 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:40,622 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:40,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:40,622 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:40,622 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:40,629 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:39:40,629 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:39:40,629 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:39:40,643 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:39:45,328 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:39:45,329 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:45,346 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:47,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:47,457 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:39:47,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-04 12:39:47,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 12:39:47,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 12:39:47,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2018-10-04 12:39:47,458 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-04 12:39:50,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:39:50,366 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-04 12:39:50,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 12:39:50,367 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-04 12:39:50,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:39:50,367 INFO L225 Difference]: With dead ends: 66 [2018-10-04 12:39:50,367 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 12:39:50,368 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=125, Invalid=3781, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 12:39:50,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 12:39:50,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 12:39:50,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 12:39:50,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 12:39:50,373 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-04 12:39:50,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:39:50,373 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 12:39:50,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 12:39:50,373 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 12:39:50,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 12:39:50,373 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:39:50,373 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1] [2018-10-04 12:39:50,374 INFO L423 AbstractCegarLoop]: === Iteration 60 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:39:50,374 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:39:50,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1442787589, now seen corresponding path program 59 times [2018-10-04 12:39:50,374 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:39:50,374 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:39:50,374 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:50,375 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:39:50,375 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:39:50,380 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:39:50,380 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:39:50,380 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:39:50,396 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:39:56,431 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 12:39:56,431 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:39:56,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:39:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:39:58,561 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:39:58,561 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-04 12:39:58,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 12:39:58,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 12:39:58,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2018-10-04 12:39:58,562 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-04 12:40:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:40:01,536 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 12:40:01,536 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 12:40:01,536 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-04 12:40:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:40:01,537 INFO L225 Difference]: With dead ends: 67 [2018-10-04 12:40:01,537 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 12:40:01,538 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=127, Invalid=3905, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:40:01,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 12:40:01,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 12:40:01,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 12:40:01,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 12:40:01,542 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-04 12:40:01,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:40:01,542 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 12:40:01,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 12:40:01,542 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 12:40:01,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 12:40:01,542 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:40:01,543 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1] [2018-10-04 12:40:01,543 INFO L423 AbstractCegarLoop]: === Iteration 61 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:40:01,543 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:40:01,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1776740324, now seen corresponding path program 60 times [2018-10-04 12:40:01,543 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:40:01,543 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:40:01,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:40:01,544 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:40:01,544 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:40:01,551 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:40:01,551 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:40:01,551 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:40:01,568 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:40:07,859 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 12:40:07,859 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:40:07,869 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:40:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:40:10,027 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:40:10,027 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-04 12:40:10,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 12:40:10,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 12:40:10,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2018-10-04 12:40:10,028 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-04 12:40:13,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:40:13,105 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-04 12:40:13,106 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 12:40:13,106 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-04 12:40:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:40:13,107 INFO L225 Difference]: With dead ends: 68 [2018-10-04 12:40:13,107 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 12:40:13,107 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=129, Invalid=4031, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:40:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 12:40:13,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 12:40:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 12:40:13,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 12:40:13,112 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-04 12:40:13,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:40:13,112 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 12:40:13,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 12:40:13,112 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 12:40:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 12:40:13,113 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:40:13,113 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1] [2018-10-04 12:40:13,113 INFO L423 AbstractCegarLoop]: === Iteration 62 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:40:13,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:40:13,113 INFO L82 PathProgramCache]: Analyzing trace with hash -755626779, now seen corresponding path program 61 times [2018-10-04 12:40:13,113 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:40:13,113 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:40:13,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:40:13,114 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:40:13,114 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:40:13,122 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:40:13,122 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:40:13,122 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:40:13,139 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:40:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:40:18,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:40:21,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:40:21,096 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:40:21,096 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-04 12:40:21,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 12:40:21,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 12:40:21,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=4033, Unknown=0, NotChecked=0, Total=4160 [2018-10-04 12:40:21,097 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-04 12:40:24,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:40:24,324 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 12:40:24,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 12:40:24,325 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-04 12:40:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:40:24,326 INFO L225 Difference]: With dead ends: 69 [2018-10-04 12:40:24,326 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 12:40:24,327 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=131, Invalid=4159, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:40:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 12:40:24,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 12:40:24,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 12:40:24,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 12:40:24,332 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-04 12:40:24,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:40:24,333 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 12:40:24,333 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 12:40:24,333 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 12:40:24,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 12:40:24,333 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:40:24,333 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1] [2018-10-04 12:40:24,333 INFO L423 AbstractCegarLoop]: === Iteration 63 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:40:24,334 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:40:24,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1949595644, now seen corresponding path program 62 times [2018-10-04 12:40:24,334 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:40:24,334 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:40:24,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:40:24,334 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:40:24,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:40:24,341 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:40:24,341 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:40:24,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:40:24,359 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:40:30,339 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:40:30,340 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:40:30,359 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:40:32,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:40:32,659 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:40:32,659 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-04 12:40:32,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 12:40:32,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 12:40:32,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2018-10-04 12:40:32,660 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-04 12:40:35,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:40:35,944 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-04 12:40:35,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 12:40:35,945 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-04 12:40:35,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:40:35,945 INFO L225 Difference]: With dead ends: 70 [2018-10-04 12:40:35,946 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 12:40:35,946 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=133, Invalid=4289, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:40:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 12:40:35,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 12:40:35,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 12:40:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 12:40:35,951 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-04 12:40:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:40:35,951 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 12:40:35,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 12:40:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 12:40:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 12:40:35,952 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:40:35,952 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1] [2018-10-04 12:40:35,952 INFO L423 AbstractCegarLoop]: === Iteration 64 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:40:35,953 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:40:35,953 INFO L82 PathProgramCache]: Analyzing trace with hash -307924795, now seen corresponding path program 63 times [2018-10-04 12:40:35,953 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:40:35,953 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:40:35,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:40:35,954 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:40:35,954 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:40:35,960 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:40:35,961 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:40:35,961 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:40:35,974 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:40:44,016 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 12:40:44,016 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:40:44,026 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:40:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:40:46,625 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:40:46,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-04 12:40:46,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 12:40:46,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 12:40:46,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=4291, Unknown=0, NotChecked=0, Total=4422 [2018-10-04 12:40:46,627 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-04 12:40:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:40:50,002 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 12:40:50,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 12:40:50,003 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-04 12:40:50,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:40:50,004 INFO L225 Difference]: With dead ends: 71 [2018-10-04 12:40:50,004 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 12:40:50,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=135, Invalid=4421, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:40:50,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 12:40:50,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 12:40:50,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 12:40:50,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 12:40:50,011 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-04 12:40:50,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:40:50,011 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 12:40:50,012 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 12:40:50,012 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 12:40:50,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 12:40:50,012 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:40:50,012 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1] [2018-10-04 12:40:50,012 INFO L423 AbstractCegarLoop]: === Iteration 65 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:40:50,013 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-10-04 12:40:50,013 INFO L82 PathProgramCache]: Analyzing trace with hash -955736028, now seen corresponding path program 64 times [2018-10-04 12:40:50,013 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:40:50,013 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:40:50,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:40:50,014 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:40:50,014 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:40:50,020 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:40:50,021 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:40:50,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:40:50,032 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:40:57,052 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:40:57,052 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:40:57,072 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:41:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:41:00,609 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:41:00,609 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2018-10-04 12:41:00,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2018-10-04 12:41:00,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2018-10-04 12:41:00,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2018-10-04 12:41:00,610 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 68 states. Received shutdown request... [2018-10-04 12:41:02,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:41:02,755 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 12:41:02,761 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 12:41:02,761 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 12:41:02 BoogieIcfgContainer [2018-10-04 12:41:02,761 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 12:41:02,762 INFO L168 Benchmark]: Toolchain (without parser) took 264292.31 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 53.5 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 120.4 MB). Peak memory consumption was 173.8 MB. Max. memory is 7.1 GB. [2018-10-04 12:41:02,763 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.18 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 12:41:02,763 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.96 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 12:41:02,764 INFO L168 Benchmark]: Boogie Preprocessor took 22.15 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 12:41:02,764 INFO L168 Benchmark]: RCFGBuilder took 301.81 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 12:41:02,765 INFO L168 Benchmark]: TraceAbstraction took 263923.18 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 53.5 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 99.2 MB). Peak memory consumption was 152.7 MB. Max. memory is 7.1 GB. [2018-10-04 12:41:02,768 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 0.18 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.96 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 22.15 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 301.81 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 263923.18 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 53.5 MB). Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 99.2 MB). Peak memory consumption was 152.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 9]: Timeout (TraceAbstraction) Unable to prove that procedure postcondition always holds (line 9). Cancelled while BasicCegarLoop was constructing difference of abstraction (69states) and FLOYD_HOARE automaton (currently 44 states, 68 states before enhancement), while ReachableStatesComputation was computing reachable states (43 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 263.8s OverallTime, 65 OverallIterations, 64 TraceHistogramMax, 83.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 192 SDtfs, 71 SDslu, 64 SDs, 0 SdLazy, 102938 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 68.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2339 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 2275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 69.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=64, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 64 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 107.6s SatisfiabilityAnalysisTime, 69.1s InterpolantComputationTime, 2340 NumberOfCodeBlocks, 2340 NumberOfCodeBlocksAsserted, 593 NumberOfCheckSat, 2275 ConstructedInterpolants, 0 QuantifiedInterpolants, 1100253 SizeOfPredicates, 65 NumberOfNonLiveVariables, 10985 ConjunctsInSsa, 8710 ConjunctsInUnsatCore, 65 InterpolantComputations, 1 PerfectInterpolantSequences, 0/45760 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Mult1-Safe.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-41-02-786.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Mult1-Safe.bpl_svcomp-Reach-32bit-Automizer_Default.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_12-41-02-786.csv Completed graceful shutdown