java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f-m [2018-10-04 14:37:56,998 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 14:37:57,000 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 14:37:57,011 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 14:37:57,011 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 14:37:57,012 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 14:37:57,014 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 14:37:57,016 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 14:37:57,017 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 14:37:57,018 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 14:37:57,019 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 14:37:57,019 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 14:37:57,020 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 14:37:57,021 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 14:37:57,022 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 14:37:57,023 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 14:37:57,024 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 14:37:57,026 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 14:37:57,028 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 14:37:57,029 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 14:37:57,031 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 14:37:57,032 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 14:37:57,034 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-04 14:37:57,034 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-04 14:37:57,035 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-04 14:37:57,036 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-04 14:37:57,037 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-04 14:37:57,037 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-04 14:37:57,038 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-04 14:37:57,039 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-04 14:37:57,039 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-04 14:37:57,040 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... 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[2018-10-04 14:37:57,043 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 14:37:57,060 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 14:37:57,060 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 14:37:57,061 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 14:37:57,061 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 14:37:57,062 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 14:37:57,062 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 14:37:57,062 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 14:37:57,065 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 14:37:57,065 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 14:37:57,066 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 14:37:57,066 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 14:37:57,066 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 14:37:57,066 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 14:37:57,066 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 14:37:57,067 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 14:37:57,067 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 14:37:57,067 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 14:37:57,067 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 14:37:57,067 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 14:37:57,067 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 14:37:57,068 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 14:37:57,068 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 14:37:57,068 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 14:37:57,068 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 14:37:57,068 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 14:37:57,069 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 14:37:57,070 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 14:37:57,070 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 14:37:57,071 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 14:37:57,071 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 14:37:57,071 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 14:37:57,118 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 14:37:57,139 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 14:37:57,146 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 14:37:57,147 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 14:37:57,148 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 14:37:57,149 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl [2018-10-04 14:37:57,149 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl' [2018-10-04 14:37:57,200 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 14:37:57,201 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 14:37:57,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 14:37:57,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 14:37:57,203 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 14:37:57,223 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 02:37:57" (1/1) ... [2018-10-04 14:37:57,236 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 02:37:57" (1/1) ... [2018-10-04 14:37:57,241 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 14:37:57,241 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 14:37:57,242 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 14:37:57,244 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 14:37:57,245 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 14:37:57,245 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 14:37:57,245 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 14:37:57,256 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 02:37:57" (1/1) ... [2018-10-04 14:37:57,256 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 02:37:57" (1/1) ... [2018-10-04 14:37:57,257 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 02:37:57" (1/1) ... [2018-10-04 14:37:57,257 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 02:37:57" (1/1) ... [2018-10-04 14:37:57,260 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 02:37:57" (1/1) ... [2018-10-04 14:37:57,265 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 02:37:57" (1/1) ... [2018-10-04 14:37:57,266 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 02:37:57" (1/1) ... [2018-10-04 14:37:57,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 14:37:57,268 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 14:37:57,268 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 14:37:57,268 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 14:37:57,269 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:57" (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 14:37:57,332 INFO L124 BoogieDeclarations]: Specification and implementation of procedure mult given in one single declaration [2018-10-04 14:37:57,332 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2018-10-04 14:37:57,332 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2018-10-04 14:37:57,392 WARN L632 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-10-04 14:37:57,525 INFO L338 CfgBuilder]: Using library mode [2018-10-04 14:37:57,526 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 02:37:57 BoogieIcfgContainer [2018-10-04 14:37:57,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 14:37:57,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 14:37:57,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 14:37:57,531 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 14:37:57,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 02:37:57" (1/2) ... [2018-10-04 14:37:57,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@210a2e99 and model type Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 02:37:57, skipping insertion in model container [2018-10-04 14:37:57,532 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 02:37:57" (2/2) ... [2018-10-04 14:37:57,534 INFO L112 eAbstractionObserver]: Analyzing ICFG Mult1-Safe.bpl [2018-10-04 14:37:57,544 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 14:37:57,552 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 14:37:57,603 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 14:37:57,604 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 14:37:57,605 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 14:37:57,605 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 14:37:57,605 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 14:37:57,605 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 14:37:57,605 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 14:37:57,606 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 14:37:57,606 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 14:37:57,619 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 14:37:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 14:37:57,626 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:57,627 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 14:37:57,628 INFO L423 AbstractCegarLoop]: === Iteration 1 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:37:57,635 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:57,636 INFO L82 PathProgramCache]: Analyzing trace with hash 924708, now seen corresponding path program 1 times [2018-10-04 14:37:57,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:57,638 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:57,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:57,684 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:57,684 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:57,718 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:37:57,718 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:37:57,718 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:37:57,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:57,750 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:57,925 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 14:37:57,947 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 14:37:57,948 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 14:37:57,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 14:37:57,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 14:37:57,964 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:57,967 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 5 states. [2018-10-04 14:37:58,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:58,165 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 14:37:58,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 14:37:58,174 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-10-04 14:37:58,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:58,188 INFO L225 Difference]: With dead ends: 10 [2018-10-04 14:37:58,189 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 14:37:58,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 3 [2018-10-04 14:37:58,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 14:37:58,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 14:37:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 14:37:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 14:37:58,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-04 14:37:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:58,227 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 14:37:58,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 14:37:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 14:37:58,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 14:37:58,228 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:58,228 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 14:37:58,229 INFO L423 AbstractCegarLoop]: === Iteration 2 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:37:58,229 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:58,229 INFO L82 PathProgramCache]: Analyzing trace with hash 28663973, now seen corresponding path program 1 times [2018-10-04 14:37:58,229 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:58,230 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:58,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:58,231 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:58,231 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:58,236 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:37:58,236 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:37:58,236 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 14:37:58,249 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:37:58,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:58,323 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 14:37:58,344 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:37:58,344 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-10-04 14:37:58,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 14:37:58,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 14:37:58,347 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:58,347 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-04 14:37:58,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:58,441 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 14:37:58,441 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 14:37:58,442 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-04 14:37:58,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:58,442 INFO L225 Difference]: With dead ends: 9 [2018-10-04 14:37:58,443 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 14:37:58,444 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time 0.0s impTime 4 [2018-10-04 14:37:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 14:37:58,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 14:37:58,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 14:37:58,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 14:37:58,447 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-04 14:37:58,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:58,448 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 14:37:58,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 14:37:58,448 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 14:37:58,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 14:37:58,449 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:58,449 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 14:37:58,449 INFO L423 AbstractCegarLoop]: === Iteration 3 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:37:58,449 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:58,450 INFO L82 PathProgramCache]: Analyzing trace with hash 888581188, now seen corresponding path program 2 times [2018-10-04 14:37:58,450 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:58,450 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:58,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:58,451 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:37:58,451 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:58,457 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:37:58,457 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:37:58,457 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 14:37:58,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:37:58,488 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:37:58,488 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:58,490 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:58,795 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 14:37:58,821 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:37:58,821 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-04 14:37:58,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 14:37:58,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 14:37:58,822 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:58,822 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-04 14:37:58,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:58,934 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 14:37:58,936 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 14:37:58,937 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-04 14:37:58,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:58,937 INFO L225 Difference]: With dead ends: 10 [2018-10-04 14:37:58,937 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 14:37:58,938 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 5 [2018-10-04 14:37:58,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 14:37:58,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 14:37:58,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 14:37:58,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 14:37:58,941 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-04 14:37:58,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:58,942 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 14:37:58,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 14:37:58,942 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 14:37:58,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 14:37:58,942 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:58,943 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2018-10-04 14:37:58,943 INFO L423 AbstractCegarLoop]: === Iteration 4 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:37:58,943 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:58,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1776211077, now seen corresponding path program 3 times [2018-10-04 14:37:58,943 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:58,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:58,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:58,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:58,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:58,952 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:37:58,952 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:37:58,952 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 14:37:58,962 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:37:58,971 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 14:37:58,972 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:58,973 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:59,091 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 14:37:59,112 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:37:59,112 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-04 14:37:59,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 14:37:59,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 14:37:59,113 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:59,113 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-04 14:37:59,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:59,307 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 14:37:59,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 14:37:59,308 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-04 14:37:59,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:59,308 INFO L225 Difference]: With dead ends: 11 [2018-10-04 14:37:59,309 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 14:37:59,309 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 6 [2018-10-04 14:37:59,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 14:37:59,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 14:37:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 14:37:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 14:37:59,313 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-04 14:37:59,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:59,313 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 14:37:59,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 14:37:59,314 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 14:37:59,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 14:37:59,314 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:59,314 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2018-10-04 14:37:59,315 INFO L423 AbstractCegarLoop]: === Iteration 5 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:37:59,315 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:59,315 INFO L82 PathProgramCache]: Analyzing trace with hash -772033436, now seen corresponding path program 4 times [2018-10-04 14:37:59,315 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:59,316 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:59,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:59,317 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:59,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:59,325 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:37:59,325 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:37:59,325 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 14:37:59,339 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:37:59,349 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:37:59,352 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:59,353 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:37:59,458 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 14:37:59,479 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:37:59,479 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-04 14:37:59,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 14:37:59,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 14:37:59,480 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:37:59,480 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-04 14:37:59,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:37:59,631 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 14:37:59,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 14:37:59,631 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-04 14:37:59,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:37:59,632 INFO L225 Difference]: With dead ends: 12 [2018-10-04 14:37:59,632 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 14:37:59,633 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 7 [2018-10-04 14:37:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 14:37:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 14:37:59,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 14:37:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 14:37:59,636 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-04 14:37:59,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:37:59,637 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 14:37:59,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 14:37:59,637 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 14:37:59,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 14:37:59,637 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:37:59,638 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1] [2018-10-04 14:37:59,638 INFO L423 AbstractCegarLoop]: === Iteration 6 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:37:59,638 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:37:59,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1836765285, now seen corresponding path program 5 times [2018-10-04 14:37:59,638 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:37:59,639 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:37:59,639 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:59,639 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:37:59,640 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:37:59,648 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:37:59,648 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:37:59,648 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 14:37:59,658 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:37:59,676 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 14:37:59,676 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:37:59,678 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:00,162 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 14:38:00,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:00,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-04 14:38:00,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 14:38:00,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 14:38:00,189 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:00,190 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-04 14:38:00,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:00,338 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 14:38:00,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 14:38:00,339 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-04 14:38:00,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:00,340 INFO L225 Difference]: With dead ends: 13 [2018-10-04 14:38:00,340 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 14:38:00,341 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 8 [2018-10-04 14:38:00,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 14:38:00,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 14:38:00,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 14:38:00,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 14:38:00,344 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-04 14:38:00,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:00,345 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 14:38:00,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 14:38:00,345 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 14:38:00,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 14:38:00,346 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:00,346 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2018-10-04 14:38:00,346 INFO L423 AbstractCegarLoop]: === Iteration 7 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:00,346 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:00,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1105147012, now seen corresponding path program 6 times [2018-10-04 14:38:00,346 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:00,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:00,347 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:00,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:00,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:00,355 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:00,355 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:00,356 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 14:38:00,366 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:00,383 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 14:38:00,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:00,386 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:00,543 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 14:38:00,566 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:00,566 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-04 14:38:00,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 14:38:00,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 14:38:00,566 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:00,567 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-04 14:38:00,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:00,684 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 14:38:00,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 14:38:00,685 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-04 14:38:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:00,686 INFO L225 Difference]: With dead ends: 14 [2018-10-04 14:38:00,686 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 14:38:00,687 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 9 [2018-10-04 14:38:00,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 14:38:00,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 14:38:00,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 14:38:00,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 14:38:00,691 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-04 14:38:00,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:00,692 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 14:38:00,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 14:38:00,692 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 14:38:00,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 14:38:00,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:00,693 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1] [2018-10-04 14:38:00,693 INFO L423 AbstractCegarLoop]: === Iteration 8 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:00,693 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:00,693 INFO L82 PathProgramCache]: Analyzing trace with hash -100182971, now seen corresponding path program 7 times [2018-10-04 14:38:00,693 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:00,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:00,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:00,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:00,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:00,703 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:00,703 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:00,703 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:38:00,711 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:00,729 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:00,869 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 14:38:00,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:00,892 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-04 14:38:00,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 14:38:00,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 14:38:00,893 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:00,893 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-04 14:38:01,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:01,046 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 14:38:01,046 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 14:38:01,046 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-04 14:38:01,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:01,047 INFO L225 Difference]: With dead ends: 15 [2018-10-04 14:38:01,047 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 14:38:01,048 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 10 [2018-10-04 14:38:01,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 14:38:01,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 14:38:01,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 14:38:01,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 14:38:01,052 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-04 14:38:01,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:01,053 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 14:38:01,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 14:38:01,053 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 14:38:01,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 14:38:01,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:01,053 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2018-10-04 14:38:01,054 INFO L423 AbstractCegarLoop]: === Iteration 9 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:01,054 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:01,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1189293220, now seen corresponding path program 8 times [2018-10-04 14:38:01,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:01,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:01,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:01,055 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:01,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:01,065 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:01,066 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:01,066 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 14:38:01,075 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:01,094 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:01,094 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:01,096 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:01,311 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 14:38:01,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:01,332 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-04 14:38:01,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 14:38:01,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 14:38:01,332 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:01,333 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-04 14:38:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:01,463 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 14:38:01,463 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 14:38:01,463 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-04 14:38:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:01,464 INFO L225 Difference]: With dead ends: 16 [2018-10-04 14:38:01,464 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 14:38:01,465 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 11 [2018-10-04 14:38:01,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 14:38:01,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 14:38:01,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 14:38:01,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 14:38:01,469 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-04 14:38:01,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:01,470 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 14:38:01,470 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 14:38:01,470 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 14:38:01,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 14:38:01,471 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:01,471 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1] [2018-10-04 14:38:01,471 INFO L423 AbstractCegarLoop]: === Iteration 10 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:01,471 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:01,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1786617819, now seen corresponding path program 9 times [2018-10-04 14:38:01,472 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:01,472 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:01,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:01,473 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:01,473 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:01,481 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:01,482 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:01,482 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 14:38:01,495 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:01,521 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 14:38:01,522 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:01,523 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:01,793 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 14:38:01,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:01,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-04 14:38:01,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 14:38:01,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 14:38:01,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:01,820 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-04 14:38:02,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:02,000 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 14:38:02,000 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 14:38:02,000 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-04 14:38:02,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:02,001 INFO L225 Difference]: With dead ends: 17 [2018-10-04 14:38:02,001 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 14:38:02,002 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 12 [2018-10-04 14:38:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 14:38:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 14:38:02,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 14:38:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 14:38:02,006 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-04 14:38:02,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:02,007 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 14:38:02,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 14:38:02,007 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 14:38:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 14:38:02,008 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:02,008 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2018-10-04 14:38:02,008 INFO L423 AbstractCegarLoop]: === Iteration 11 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:02,008 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:02,008 INFO L82 PathProgramCache]: Analyzing trace with hash 449420484, now seen corresponding path program 10 times [2018-10-04 14:38:02,008 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:02,008 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:02,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:02,009 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:02,009 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:02,019 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:02,019 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:02,020 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 14:38:02,036 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:38:02,073 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:02,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:02,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:02,351 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 14:38:02,372 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:02,372 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-04 14:38:02,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 14:38:02,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 14:38:02,373 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:02,373 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-04 14:38:02,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:02,691 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 14:38:02,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 14:38:02,691 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-04 14:38:02,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:02,692 INFO L225 Difference]: With dead ends: 18 [2018-10-04 14:38:02,693 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 14:38:02,693 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 13 [2018-10-04 14:38:02,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 14:38:02,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 14:38:02,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 14:38:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 14:38:02,699 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-04 14:38:02,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:02,699 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 14:38:02,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 14:38:02,699 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 14:38:02,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 14:38:02,700 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:02,700 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1] [2018-10-04 14:38:02,700 INFO L423 AbstractCegarLoop]: === Iteration 12 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:02,701 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:02,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1047131141, now seen corresponding path program 11 times [2018-10-04 14:38:02,701 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:02,701 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:02,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:02,702 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:02,702 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:02,715 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:02,715 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:02,716 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (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 14:38:02,723 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:02,762 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 14:38:02,762 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:02,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:02,988 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 14:38:03,009 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:03,009 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-04 14:38:03,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 14:38:03,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 14:38:03,010 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:03,010 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-04 14:38:03,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:03,430 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 14:38:03,430 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 14:38:03,430 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-04 14:38:03,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:03,431 INFO L225 Difference]: With dead ends: 19 [2018-10-04 14:38:03,431 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 14:38:03,432 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 14 [2018-10-04 14:38:03,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 14:38:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 14:38:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 14:38:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 14:38:03,437 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-04 14:38:03,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:03,437 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 14:38:03,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 14:38:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 14:38:03,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 14:38:03,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:03,438 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1] [2018-10-04 14:38:03,438 INFO L423 AbstractCegarLoop]: === Iteration 13 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:03,439 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:03,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1898674972, now seen corresponding path program 12 times [2018-10-04 14:38:03,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:03,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:03,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:03,440 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:03,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:03,450 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:03,450 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:03,450 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 14:38:03,462 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:03,502 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 14:38:03,502 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:03,505 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:03,752 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 14:38:03,772 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:03,772 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-04 14:38:03,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 14:38:03,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 14:38:03,773 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:03,773 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-04 14:38:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:04,143 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 14:38:04,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 14:38:04,144 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-04 14:38:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:04,144 INFO L225 Difference]: With dead ends: 20 [2018-10-04 14:38:04,145 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 14:38:04,145 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.1s impTime 15 [2018-10-04 14:38:04,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 14:38:04,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 14:38:04,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 14:38:04,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 14:38:04,150 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-04 14:38:04,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:04,150 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 14:38:04,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 14:38:04,151 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 14:38:04,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 14:38:04,151 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:04,151 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1] [2018-10-04 14:38:04,152 INFO L423 AbstractCegarLoop]: === Iteration 14 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:04,152 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:04,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1270616037, now seen corresponding path program 13 times [2018-10-04 14:38:04,152 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:04,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:04,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:04,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:04,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:04,163 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:04,163 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:04,163 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:38:04,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:04,224 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:04,552 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 14:38:04,573 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:04,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-04 14:38:04,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 14:38:04,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 14:38:04,574 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:04,574 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-04 14:38:05,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:05,169 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 14:38:05,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 14:38:05,170 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-04 14:38:05,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:05,170 INFO L225 Difference]: With dead ends: 21 [2018-10-04 14:38:05,171 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 14:38:05,171 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 16 [2018-10-04 14:38:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 14:38:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 14:38:05,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 14:38:05,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 14:38:05,176 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-04 14:38:05,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:05,176 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 14:38:05,176 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 14:38:05,176 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 14:38:05,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 14:38:05,177 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:05,177 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1] [2018-10-04 14:38:05,177 INFO L423 AbstractCegarLoop]: === Iteration 15 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:05,178 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:05,178 INFO L82 PathProgramCache]: Analyzing trace with hash 734389508, now seen corresponding path program 14 times [2018-10-04 14:38:05,178 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:05,178 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:05,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:05,179 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:05,179 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:05,189 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:05,189 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:05,189 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 14:38:05,206 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:05,292 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:05,292 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:05,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:06,237 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 14:38:06,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:06,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-04 14:38:06,259 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 14:38:06,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 14:38:06,259 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:06,259 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-04 14:38:06,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:06,551 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 14:38:06,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 14:38:06,552 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-04 14:38:06,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:06,552 INFO L225 Difference]: With dead ends: 22 [2018-10-04 14:38:06,552 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 14:38:06,553 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.6s impTime 17 [2018-10-04 14:38:06,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 14:38:06,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 14:38:06,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 14:38:06,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 14:38:06,558 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-04 14:38:06,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:06,558 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 14:38:06,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 14:38:06,558 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 14:38:06,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 14:38:06,559 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:06,559 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1] [2018-10-04 14:38:06,559 INFO L423 AbstractCegarLoop]: === Iteration 16 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:06,560 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:06,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1291236293, now seen corresponding path program 15 times [2018-10-04 14:38:06,560 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:06,560 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:06,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:06,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:06,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:06,570 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:06,571 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:06,571 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 14:38:06,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:06,689 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 14:38:06,690 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:06,694 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:08,032 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 14:38:08,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:08,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-04 14:38:08,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 14:38:08,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 14:38:08,053 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:08,053 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-04 14:38:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:08,522 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 14:38:08,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 14:38:08,522 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-04 14:38:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:08,523 INFO L225 Difference]: With dead ends: 23 [2018-10-04 14:38:08,523 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 14:38:08,524 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.0s impTime 18 [2018-10-04 14:38:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 14:38:08,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 14:38:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 14:38:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 14:38:08,529 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-04 14:38:08,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:08,530 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 14:38:08,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 14:38:08,530 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 14:38:08,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 14:38:08,530 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:08,530 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1] [2018-10-04 14:38:08,531 INFO L423 AbstractCegarLoop]: === Iteration 17 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:08,531 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:08,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1373617444, now seen corresponding path program 16 times [2018-10-04 14:38:08,531 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:08,531 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:08,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:08,532 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:08,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:08,542 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:08,542 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:08,543 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) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 14:38:08,554 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:38:08,634 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:08,634 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:08,637 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:09,260 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 14:38:09,283 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:09,283 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-04 14:38:09,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 14:38:09,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 14:38:09,284 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:09,284 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-04 14:38:09,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:09,735 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 14:38:09,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 14:38:09,736 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-04 14:38:09,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:09,736 INFO L225 Difference]: With dead ends: 24 [2018-10-04 14:38:09,737 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 14:38:09,737 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.4s impTime 19 [2018-10-04 14:38:09,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 14:38:09,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 14:38:09,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 14:38:09,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 14:38:09,741 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-04 14:38:09,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:09,741 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 14:38:09,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 14:38:09,741 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 14:38:09,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 14:38:09,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:09,742 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1] [2018-10-04 14:38:09,742 INFO L423 AbstractCegarLoop]: === Iteration 18 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:09,743 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:09,743 INFO L82 PathProgramCache]: Analyzing trace with hash -367534171, now seen corresponding path program 17 times [2018-10-04 14:38:09,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:09,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:09,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:09,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:09,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:09,766 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:09,767 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:09,767 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 14:38:09,788 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:09,898 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 14:38:09,898 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:09,900 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:10,228 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 14:38:10,251 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:10,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-04 14:38:10,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 14:38:10,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 14:38:10,252 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:10,252 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-04 14:38:10,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:10,680 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 14:38:10,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 14:38:10,681 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-04 14:38:10,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:10,681 INFO L225 Difference]: With dead ends: 25 [2018-10-04 14:38:10,682 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 14:38:10,682 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 20 [2018-10-04 14:38:10,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 14:38:10,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 14:38:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 14:38:10,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 14:38:10,687 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-04 14:38:10,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:10,687 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 14:38:10,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 14:38:10,688 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 14:38:10,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 14:38:10,688 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:10,688 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1] [2018-10-04 14:38:10,689 INFO L423 AbstractCegarLoop]: === Iteration 19 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:10,689 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:10,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1491340612, now seen corresponding path program 18 times [2018-10-04 14:38:10,689 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:10,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:10,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:10,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:10,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:10,698 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:10,698 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:10,698 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 14:38:10,714 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:10,826 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 14:38:10,827 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:10,829 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:11,210 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 14:38:11,230 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:11,230 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-04 14:38:11,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 14:38:11,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 14:38:11,231 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:11,231 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-04 14:38:11,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:11,668 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 14:38:11,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 14:38:11,669 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-04 14:38:11,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:11,670 INFO L225 Difference]: With dead ends: 26 [2018-10-04 14:38:11,670 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 14:38:11,670 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.3s impTime 21 [2018-10-04 14:38:11,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 14:38:11,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 14:38:11,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 14:38:11,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 14:38:11,676 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-04 14:38:11,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:11,677 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 14:38:11,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 14:38:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 14:38:11,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 14:38:11,678 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:11,678 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1] [2018-10-04 14:38:11,678 INFO L423 AbstractCegarLoop]: === Iteration 20 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:11,678 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:11,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1013083259, now seen corresponding path program 19 times [2018-10-04 14:38:11,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:11,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:11,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:11,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:11,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:11,688 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:11,688 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:11,688 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 14:38:11,700 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:11,839 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:12,269 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 14:38:12,288 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:12,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-04 14:38:12,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 14:38:12,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 14:38:12,289 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:12,289 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-04 14:38:12,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:12,953 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 14:38:12,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 14:38:12,954 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-04 14:38:12,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:12,955 INFO L225 Difference]: With dead ends: 27 [2018-10-04 14:38:12,955 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 14:38:12,955 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 22 [2018-10-04 14:38:12,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 14:38:12,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 14:38:12,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 14:38:12,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 14:38:12,960 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-04 14:38:12,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:12,961 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 14:38:12,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 14:38:12,961 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 14:38:12,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 14:38:12,961 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:12,962 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1] [2018-10-04 14:38:12,962 INFO L423 AbstractCegarLoop]: === Iteration 21 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:12,962 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:12,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1340811932, now seen corresponding path program 20 times [2018-10-04 14:38:12,962 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:12,962 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:12,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:12,963 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:12,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:12,970 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:12,970 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:12,970 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 14:38:12,990 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:13,144 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:13,144 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:13,147 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:13,605 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 14:38:13,626 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:13,626 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-04 14:38:13,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 14:38:13,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 14:38:13,627 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:13,627 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-04 14:38:14,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:14,086 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 14:38:14,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 14:38:14,087 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-04 14:38:14,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:14,087 INFO L225 Difference]: With dead ends: 28 [2018-10-04 14:38:14,088 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 14:38:14,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 23 [2018-10-04 14:38:14,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 14:38:14,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 14:38:14,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 14:38:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 14:38:14,094 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-04 14:38:14,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:14,095 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 14:38:14,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 14:38:14,095 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 14:38:14,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 14:38:14,096 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:14,096 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1] [2018-10-04 14:38:14,096 INFO L423 AbstractCegarLoop]: === Iteration 22 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:14,096 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:14,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1384501093, now seen corresponding path program 21 times [2018-10-04 14:38:14,096 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:14,096 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:14,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:14,097 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:14,097 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:14,104 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:14,104 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:14,104 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 14:38:14,115 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:14,291 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 14:38:14,291 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:14,294 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:14,980 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 14:38:15,001 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:15,001 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-04 14:38:15,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 14:38:15,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 14:38:15,002 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:15,002 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-04 14:38:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:15,642 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 14:38:15,643 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 14:38:15,643 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-04 14:38:15,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:15,644 INFO L225 Difference]: With dead ends: 29 [2018-10-04 14:38:15,644 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 14:38:15,645 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 24 [2018-10-04 14:38:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 14:38:15,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 14:38:15,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 14:38:15,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 14:38:15,649 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-04 14:38:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:15,649 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 14:38:15,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 14:38:15,650 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 14:38:15,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 14:38:15,650 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:15,650 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2018-10-04 14:38:15,651 INFO L423 AbstractCegarLoop]: === Iteration 23 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:15,651 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:15,651 INFO L82 PathProgramCache]: Analyzing trace with hash -30141052, now seen corresponding path program 22 times [2018-10-04 14:38:15,651 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:15,651 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:15,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:15,652 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:15,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:15,659 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:15,659 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:15,659 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 14:38:15,681 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:38:15,872 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:15,872 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:15,875 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:16,362 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 14:38:16,391 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:16,391 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-04 14:38:16,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 14:38:16,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 14:38:16,392 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:16,392 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-04 14:38:17,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:17,002 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 14:38:17,003 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 14:38:17,003 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-04 14:38:17,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:17,004 INFO L225 Difference]: With dead ends: 30 [2018-10-04 14:38:17,004 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 14:38:17,005 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 25 [2018-10-04 14:38:17,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 14:38:17,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 14:38:17,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 14:38:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 14:38:17,009 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-04 14:38:17,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:17,009 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 14:38:17,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 14:38:17,010 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 14:38:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 14:38:17,010 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:17,010 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1] [2018-10-04 14:38:17,011 INFO L423 AbstractCegarLoop]: === Iteration 24 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:17,011 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:17,011 INFO L82 PathProgramCache]: Analyzing trace with hash -934374587, now seen corresponding path program 23 times [2018-10-04 14:38:17,011 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:17,011 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:17,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:17,012 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:17,012 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:17,021 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:17,021 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:17,021 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 14:38:17,041 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:17,288 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 14:38:17,288 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:17,292 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:17,839 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 14:38:17,861 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:17,861 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-04 14:38:17,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 14:38:17,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 14:38:17,862 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:17,862 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-04 14:38:18,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:18,381 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 14:38:18,381 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 14:38:18,381 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-04 14:38:18,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:18,382 INFO L225 Difference]: With dead ends: 31 [2018-10-04 14:38:18,382 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 14:38:18,383 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 26 [2018-10-04 14:38:18,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 14:38:18,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 14:38:18,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 14:38:18,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 14:38:18,389 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-04 14:38:18,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:18,390 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 14:38:18,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 14:38:18,390 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 14:38:18,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 14:38:18,391 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:18,391 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1] [2018-10-04 14:38:18,391 INFO L423 AbstractCegarLoop]: === Iteration 25 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:18,391 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:18,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1099156900, now seen corresponding path program 24 times [2018-10-04 14:38:18,392 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:18,392 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:18,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:18,393 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:18,393 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:18,400 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:18,400 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:18,400 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 14:38:18,411 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:18,681 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 14:38:18,682 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:18,685 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:19,300 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 14:38:19,320 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:19,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-04 14:38:19,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 14:38:19,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 14:38:19,321 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:19,321 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-04 14:38:20,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:20,012 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 14:38:20,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 14:38:20,013 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-04 14:38:20,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:20,013 INFO L225 Difference]: With dead ends: 32 [2018-10-04 14:38:20,013 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 14:38:20,014 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 27 [2018-10-04 14:38:20,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 14:38:20,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 14:38:20,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 14:38:20,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 14:38:20,019 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-04 14:38:20,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:20,019 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 14:38:20,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 14:38:20,019 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 14:38:20,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 14:38:20,020 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:20,020 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1] [2018-10-04 14:38:20,020 INFO L423 AbstractCegarLoop]: === Iteration 26 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:20,020 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:20,020 INFO L82 PathProgramCache]: Analyzing trace with hash -285876443, now seen corresponding path program 25 times [2018-10-04 14:38:20,020 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:20,020 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:20,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:20,021 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:20,021 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:20,027 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:20,027 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:20,028 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) [2018-10-04 14:38:20,046 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 14:38:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:20,374 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:20,938 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 14:38:20,957 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:20,957 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-04 14:38:20,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 14:38:20,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 14:38:20,958 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:20,958 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-04 14:38:21,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:21,555 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 14:38:21,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 14:38:21,556 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-04 14:38:21,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:21,557 INFO L225 Difference]: With dead ends: 33 [2018-10-04 14:38:21,557 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 14:38:21,558 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 28 [2018-10-04 14:38:21,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 14:38:21,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 14:38:21,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 14:38:21,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 14:38:21,562 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-04 14:38:21,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:21,562 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 14:38:21,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 14:38:21,562 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 14:38:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 14:38:21,563 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:21,563 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1] [2018-10-04 14:38:21,563 INFO L423 AbstractCegarLoop]: === Iteration 27 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:21,563 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:21,563 INFO L82 PathProgramCache]: Analyzing trace with hash -272237116, now seen corresponding path program 26 times [2018-10-04 14:38:21,563 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:21,564 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:21,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:21,564 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:21,564 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:21,570 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:21,570 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:21,570 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 14:38:21,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:21,961 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:21,961 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:21,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:23,839 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 14:38:23,859 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:23,859 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-04 14:38:23,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 14:38:23,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 14:38:23,859 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:23,860 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-04 14:38:24,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:24,621 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 14:38:24,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 14:38:24,621 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-04 14:38:24,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:24,622 INFO L225 Difference]: With dead ends: 34 [2018-10-04 14:38:24,622 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 14:38:24,622 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.6s impTime 29 [2018-10-04 14:38:24,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 14:38:24,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 14:38:24,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 14:38:24,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 14:38:24,627 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-04 14:38:24,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:24,627 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 14:38:24,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 14:38:24,627 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 14:38:24,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 14:38:24,628 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:24,628 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1] [2018-10-04 14:38:24,628 INFO L423 AbstractCegarLoop]: === Iteration 28 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:24,628 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:24,628 INFO L82 PathProgramCache]: Analyzing trace with hash 150582021, now seen corresponding path program 27 times [2018-10-04 14:38:24,628 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:24,628 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:24,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:24,629 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:24,629 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:24,636 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:24,636 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:24,636 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 14:38:24,650 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:25,097 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 14:38:25,097 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:25,100 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:25,733 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 14:38:25,753 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:25,753 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-04 14:38:25,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 14:38:25,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 14:38:25,754 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:25,754 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-04 14:38:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:26,429 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 14:38:26,429 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 14:38:26,430 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-04 14:38:26,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:26,430 INFO L225 Difference]: With dead ends: 35 [2018-10-04 14:38:26,430 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 14:38:26,431 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 30 [2018-10-04 14:38:26,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 14:38:26,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 14:38:26,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 14:38:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 14:38:26,436 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-04 14:38:26,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:26,436 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 14:38:26,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 14:38:26,437 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 14:38:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 14:38:26,438 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:26,438 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1] [2018-10-04 14:38:26,439 INFO L423 AbstractCegarLoop]: === Iteration 29 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:26,439 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:26,439 INFO L82 PathProgramCache]: Analyzing trace with hash 373073380, now seen corresponding path program 28 times [2018-10-04 14:38:26,439 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:26,439 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:26,439 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:26,439 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:26,440 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:26,446 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:26,446 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:26,446 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 14:38:26,460 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:38:26,970 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:26,970 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:26,974 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:27,659 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 14:38:27,678 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:27,678 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-04 14:38:27,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 14:38:27,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 14:38:27,679 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:27,679 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-04 14:38:28,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:28,425 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 14:38:28,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 14:38:28,426 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-04 14:38:28,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:28,427 INFO L225 Difference]: With dead ends: 36 [2018-10-04 14:38:28,427 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 14:38:28,427 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.6s impTime 31 [2018-10-04 14:38:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 14:38:28,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 14:38:28,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 14:38:28,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 14:38:28,433 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-04 14:38:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:28,433 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 14:38:28,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 14:38:28,434 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 14:38:28,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 14:38:28,434 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:28,434 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1] [2018-10-04 14:38:28,435 INFO L423 AbstractCegarLoop]: === Iteration 30 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:28,435 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:28,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1319629083, now seen corresponding path program 29 times [2018-10-04 14:38:28,435 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:28,435 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:28,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:28,436 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:28,436 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:28,443 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:28,443 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:28,443 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 14:38:28,456 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:28,959 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 14:38:28,959 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:28,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:29,928 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 14:38:29,955 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:29,956 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-04 14:38:29,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 14:38:29,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 14:38:29,956 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:29,956 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-04 14:38:30,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:30,735 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 14:38:30,735 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 14:38:30,735 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-04 14:38:30,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:30,736 INFO L225 Difference]: With dead ends: 37 [2018-10-04 14:38:30,736 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 14:38:30,736 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.8s impTime 32 [2018-10-04 14:38:30,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 14:38:30,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 14:38:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 14:38:30,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 14:38:30,741 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-04 14:38:30,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:30,742 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 14:38:30,742 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 14:38:30,742 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 14:38:30,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 14:38:30,742 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:30,742 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1] [2018-10-04 14:38:30,742 INFO L423 AbstractCegarLoop]: === Iteration 31 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:30,743 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:30,743 INFO L82 PathProgramCache]: Analyzing trace with hash 2041169412, now seen corresponding path program 30 times [2018-10-04 14:38:30,743 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:30,743 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:30,743 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:30,744 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:30,744 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:30,750 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:30,750 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:30,750 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 14:38:30,781 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:31,633 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 14:38:31,633 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:31,638 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:32,445 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 14:38:32,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:32,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-04 14:38:32,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 14:38:32,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 14:38:32,466 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:32,466 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-04 14:38:33,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:33,309 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 14:38:33,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 14:38:33,309 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-04 14:38:33,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:33,310 INFO L225 Difference]: With dead ends: 38 [2018-10-04 14:38:33,310 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 14:38:33,311 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.7s impTime 33 [2018-10-04 14:38:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 14:38:33,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 14:38:33,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 14:38:33,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 14:38:33,316 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-04 14:38:33,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:33,316 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 14:38:33,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 14:38:33,317 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 14:38:33,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 14:38:33,317 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:33,317 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1] [2018-10-04 14:38:33,317 INFO L423 AbstractCegarLoop]: === Iteration 32 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:33,318 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1148259643, now seen corresponding path program 31 times [2018-10-04 14:38:33,318 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:33,318 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:33,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:33,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:33,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:33,325 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:33,325 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:33,325 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 14:38:33,345 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:33,968 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:34,926 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 14:38:34,945 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:34,945 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-04 14:38:34,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 14:38:34,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 14:38:34,946 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:34,946 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-04 14:38:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:35,809 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 14:38:35,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 14:38:35,809 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-04 14:38:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:35,810 INFO L225 Difference]: With dead ends: 39 [2018-10-04 14:38:35,810 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 14:38:35,810 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.8s impTime 34 [2018-10-04 14:38:35,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 14:38:35,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 14:38:35,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 14:38:35,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 14:38:35,815 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-04 14:38:35,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:35,816 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 14:38:35,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 14:38:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 14:38:35,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 14:38:35,816 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:35,816 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1] [2018-10-04 14:38:35,816 INFO L423 AbstractCegarLoop]: === Iteration 33 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:35,816 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:35,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1236312540, now seen corresponding path program 32 times [2018-10-04 14:38:35,817 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:35,817 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:35,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:35,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:35,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:35,822 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:35,823 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:35,823 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 14:38:35,832 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:36,507 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:36,507 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:36,512 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:37,362 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 14:38:37,381 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:37,382 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-04 14:38:37,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 14:38:37,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 14:38:37,382 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:37,383 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-04 14:38:38,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:38,356 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-04 14:38:38,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 14:38:38,356 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-04 14:38:38,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:38,357 INFO L225 Difference]: With dead ends: 40 [2018-10-04 14:38:38,357 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 14:38:38,358 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.7s impTime 35 [2018-10-04 14:38:38,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 14:38:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 14:38:38,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 14:38:38,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 14:38:38,362 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-04 14:38:38,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:38,363 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 14:38:38,363 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 14:38:38,363 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 14:38:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 14:38:38,363 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:38,364 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1] [2018-10-04 14:38:38,364 INFO L423 AbstractCegarLoop]: === Iteration 34 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:38,364 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:38,364 INFO L82 PathProgramCache]: Analyzing trace with hash 329014949, now seen corresponding path program 33 times [2018-10-04 14:38:38,364 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:38,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:38,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:38,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:38,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:38,371 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:38,372 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:38,372 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 14:38:38,396 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:39,090 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 14:38:39,090 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:39,094 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:40,137 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 14:38:40,157 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:40,157 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-04 14:38:40,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 14:38:40,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 14:38:40,158 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:40,158 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-04 14:38:41,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:41,126 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 14:38:41,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 14:38:41,127 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-04 14:38:41,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:41,127 INFO L225 Difference]: With dead ends: 41 [2018-10-04 14:38:41,128 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 14:38:41,128 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.9s impTime 36 [2018-10-04 14:38:41,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 14:38:41,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 14:38:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 14:38:41,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 14:38:41,132 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-04 14:38:41,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:41,132 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 14:38:41,132 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 14:38:41,132 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 14:38:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 14:38:41,133 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:41,133 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1] [2018-10-04 14:38:41,133 INFO L423 AbstractCegarLoop]: === Iteration 35 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:41,133 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:41,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1609526852, now seen corresponding path program 34 times [2018-10-04 14:38:41,133 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:41,134 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:41,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:41,134 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:41,134 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:41,140 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:41,140 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:41,141 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) [2018-10-04 14:38:41,160 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 14:38:41,908 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:38:41,908 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:41,913 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:42,871 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 14:38:42,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:42,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-04 14:38:42,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 14:38:42,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 14:38:42,892 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:42,892 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-04 14:38:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:43,911 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-04 14:38:43,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 14:38:43,912 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-04 14:38:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:43,913 INFO L225 Difference]: With dead ends: 42 [2018-10-04 14:38:43,913 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 14:38:43,913 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.8s impTime 37 [2018-10-04 14:38:43,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 14:38:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 14:38:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 14:38:43,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 14:38:43,919 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-04 14:38:43,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:43,919 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 14:38:43,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 14:38:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 14:38:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 14:38:43,919 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:43,920 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1] [2018-10-04 14:38:43,920 INFO L423 AbstractCegarLoop]: === Iteration 36 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:43,920 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:43,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1644277115, now seen corresponding path program 35 times [2018-10-04 14:38:43,920 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:43,920 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:43,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:43,921 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:43,921 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:43,927 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:43,927 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:43,927 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 14:38:43,943 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:38:44,904 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 14:38:44,905 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:44,911 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:45,995 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 14:38:46,015 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:46,015 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-04 14:38:46,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 14:38:46,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 14:38:46,015 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:46,015 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-04 14:38:47,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:47,091 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 14:38:47,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 14:38:47,092 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-04 14:38:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:47,092 INFO L225 Difference]: With dead ends: 43 [2018-10-04 14:38:47,093 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 14:38:47,093 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 38 [2018-10-04 14:38:47,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 14:38:47,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 14:38:47,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 14:38:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 14:38:47,098 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-04 14:38:47,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:47,098 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 14:38:47,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 14:38:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 14:38:47,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 14:38:47,099 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:47,099 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1] [2018-10-04 14:38:47,099 INFO L423 AbstractCegarLoop]: === Iteration 37 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:47,099 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:47,099 INFO L82 PathProgramCache]: Analyzing trace with hash 567015012, now seen corresponding path program 36 times [2018-10-04 14:38:47,099 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:47,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:47,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:47,100 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:47,100 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:47,106 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:47,106 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:47,106 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 14:38:47,120 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:38:47,854 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 14:38:47,854 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:47,858 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:48,984 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 14:38:49,004 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:49,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-04 14:38:49,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 14:38:49,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 14:38:49,005 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:49,005 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-04 14:38:50,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:50,232 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-04 14:38:50,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 14:38:50,232 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-04 14:38:50,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:50,233 INFO L225 Difference]: With dead ends: 44 [2018-10-04 14:38:50,233 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 14:38:50,233 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 1.0s impTime 39 [2018-10-04 14:38:50,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 14:38:50,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 14:38:50,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 14:38:50,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 14:38:50,236 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-04 14:38:50,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:50,236 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 14:38:50,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 14:38:50,236 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 14:38:50,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 14:38:50,237 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:50,237 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1] [2018-10-04 14:38:50,237 INFO L423 AbstractCegarLoop]: === Iteration 38 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:50,237 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:50,237 INFO L82 PathProgramCache]: Analyzing trace with hash 397594213, now seen corresponding path program 37 times [2018-10-04 14:38:50,237 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:50,237 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:50,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:50,238 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:50,238 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:50,243 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:50,244 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:50,244 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 14:38:50,251 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:38:51,261 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:53,009 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 14:38:53,029 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:53,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-04 14:38:53,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 14:38:53,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 14:38:53,029 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:53,029 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-04 14:38:54,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:54,212 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 14:38:54,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 14:38:54,213 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-04 14:38:54,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:54,213 INFO L225 Difference]: With dead ends: 45 [2018-10-04 14:38:54,214 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 14:38:54,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.4s impTime 40 [2018-10-04 14:38:54,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 14:38:54,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 14:38:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 14:38:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 14:38:54,218 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-04 14:38:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:54,218 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 14:38:54,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 14:38:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 14:38:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 14:38:54,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:54,219 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1] [2018-10-04 14:38:54,219 INFO L423 AbstractCegarLoop]: === Iteration 39 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:54,219 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:54,219 INFO L82 PathProgramCache]: Analyzing trace with hash -559483260, now seen corresponding path program 38 times [2018-10-04 14:38:54,219 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:54,219 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:54,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:54,220 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:38:54,220 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:54,226 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:54,226 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:54,226 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 14:38:54,240 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:38:55,236 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:38:55,237 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:55,242 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:38:56,480 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 14:38:56,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:38:56,500 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-04 14:38:56,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 14:38:56,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 14:38:56,501 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:38:56,501 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-04 14:38:57,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:38:57,778 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-04 14:38:57,778 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 14:38:57,779 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-04 14:38:57,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:38:57,779 INFO L225 Difference]: With dead ends: 46 [2018-10-04 14:38:57,779 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 14:38:57,780 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.1s impTime 41 [2018-10-04 14:38:57,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 14:38:57,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 14:38:57,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 14:38:57,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 14:38:57,784 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-04 14:38:57,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:38:57,784 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 14:38:57,784 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 14:38:57,784 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 14:38:57,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 14:38:57,785 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:38:57,785 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1] [2018-10-04 14:38:57,785 INFO L423 AbstractCegarLoop]: === Iteration 40 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:38:57,785 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:38:57,785 INFO L82 PathProgramCache]: Analyzing trace with hash -164113851, now seen corresponding path program 39 times [2018-10-04 14:38:57,785 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:38:57,785 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:38:57,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:57,786 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:38:57,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:38:57,792 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:38:57,792 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:38:57,792 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 14:38:57,806 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:38:59,021 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 14:38:59,021 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:38:59,025 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:00,271 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 14:39:00,292 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:39:00,292 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-04 14:39:00,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 14:39:00,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 14:39:00,293 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:00,293 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-04 14:39:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:01,671 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 14:39:01,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 14:39:01,672 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-04 14:39:01,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:01,672 INFO L225 Difference]: With dead ends: 47 [2018-10-04 14:39:01,673 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 14:39:01,673 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.1s impTime 42 [2018-10-04 14:39:01,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 14:39:01,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 14:39:01,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 14:39:01,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 14:39:01,677 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-04 14:39:01,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:01,677 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 14:39:01,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 14:39:01,677 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 14:39:01,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 14:39:01,677 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:01,678 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1] [2018-10-04 14:39:01,678 INFO L423 AbstractCegarLoop]: === Iteration 41 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:39:01,678 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:01,678 INFO L82 PathProgramCache]: Analyzing trace with hash -792564060, now seen corresponding path program 40 times [2018-10-04 14:39:01,678 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:01,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:01,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:01,679 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:01,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:01,684 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:39:01,685 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:39:01,685 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 14:39:01,697 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:39:03,259 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:39:03,260 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:03,268 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:04,533 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 14:39:04,553 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:39:04,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-04 14:39:04,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 14:39:04,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 14:39:04,554 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:04,554 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-04 14:39:05,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:05,999 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-04 14:39:05,999 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 14:39:05,999 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-04 14:39:06,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:06,000 INFO L225 Difference]: With dead ends: 48 [2018-10-04 14:39:06,000 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 14:39:06,001 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.1s impTime 43 [2018-10-04 14:39:06,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 14:39:06,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 14:39:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 14:39:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 14:39:06,005 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-04 14:39:06,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:06,005 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 14:39:06,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 14:39:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 14:39:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 14:39:06,005 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:06,006 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1] [2018-10-04 14:39:06,006 INFO L423 AbstractCegarLoop]: === Iteration 42 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:39:06,006 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:06,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1200315941, now seen corresponding path program 41 times [2018-10-04 14:39:06,006 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:06,006 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:06,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:06,007 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:06,007 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:06,012 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:39:06,012 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:39:06,012 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 14:39:06,026 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:39:07,525 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 14:39:07,525 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:07,536 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:08,869 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 14:39:08,888 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:39:08,888 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-04 14:39:08,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 14:39:08,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 14:39:08,889 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:08,889 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-04 14:39:10,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:10,323 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 14:39:10,324 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 14:39:10,324 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-04 14:39:10,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:10,324 INFO L225 Difference]: With dead ends: 49 [2018-10-04 14:39:10,325 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 14:39:10,325 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.2s impTime 44 [2018-10-04 14:39:10,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 14:39:10,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 14:39:10,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 14:39:10,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 14:39:10,330 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-04 14:39:10,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:10,330 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 14:39:10,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 14:39:10,331 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 14:39:10,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 14:39:10,331 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:10,331 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1] [2018-10-04 14:39:10,331 INFO L423 AbstractCegarLoop]: === Iteration 43 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:39:10,332 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:10,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1444913468, now seen corresponding path program 42 times [2018-10-04 14:39:10,332 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:10,332 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:10,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:10,333 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:10,333 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:10,339 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:39:10,339 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:39:10,339 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 14:39:10,354 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:39:12,123 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 14:39:12,123 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:12,128 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:13,536 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 14:39:13,555 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:39:13,555 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-04 14:39:13,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 14:39:13,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 14:39:13,556 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:13,556 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-04 14:39:15,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:15,049 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-04 14:39:15,049 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 14:39:15,050 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-04 14:39:15,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:15,050 INFO L225 Difference]: With dead ends: 50 [2018-10-04 14:39:15,050 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 14:39:15,051 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.2s impTime 45 [2018-10-04 14:39:15,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 14:39:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 14:39:15,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 14:39:15,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 14:39:15,056 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-04 14:39:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:15,057 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 14:39:15,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 14:39:15,057 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 14:39:15,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 14:39:15,057 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:15,058 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1] [2018-10-04 14:39:15,058 INFO L423 AbstractCegarLoop]: === Iteration 44 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:39:15,058 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:15,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1842646523, now seen corresponding path program 43 times [2018-10-04 14:39:15,058 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:15,058 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:15,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:15,059 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:15,059 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:15,064 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:39:15,065 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:39:15,065 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 14:39:15,078 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:16,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:16,680 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:18,118 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 14:39:18,138 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:39:18,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-04 14:39:18,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 14:39:18,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 14:39:18,138 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:18,139 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-04 14:39:19,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:19,697 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 14:39:19,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 14:39:19,697 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-04 14:39:19,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:19,698 INFO L225 Difference]: With dead ends: 51 [2018-10-04 14:39:19,698 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 14:39:19,699 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s Time 1.3s impTime 46 [2018-10-04 14:39:19,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 14:39:19,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 14:39:19,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 14:39:19,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 14:39:19,702 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-04 14:39:19,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:19,703 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 14:39:19,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 14:39:19,703 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 14:39:19,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 14:39:19,703 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:19,703 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1] [2018-10-04 14:39:19,704 INFO L423 AbstractCegarLoop]: === Iteration 45 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:39:19,704 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:19,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1287469340, now seen corresponding path program 44 times [2018-10-04 14:39:19,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:19,704 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:19,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:19,705 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:19,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:19,711 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:39:19,711 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:39:19,711 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 14:39:19,724 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:39:21,403 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:39:21,403 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:21,411 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:22,930 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 14:39:22,951 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:39:22,951 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-04 14:39:22,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 14:39:22,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 14:39:22,951 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:22,951 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-04 14:39:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:24,585 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-04 14:39:24,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 14:39:24,585 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-04 14:39:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:24,586 INFO L225 Difference]: With dead ends: 52 [2018-10-04 14:39:24,586 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 14:39:24,586 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.3s impTime 47 [2018-10-04 14:39:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 14:39:24,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 14:39:24,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 14:39:24,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 14:39:24,591 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-04 14:39:24,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:24,591 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 14:39:24,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 14:39:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 14:39:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 14:39:24,591 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:24,591 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1] [2018-10-04 14:39:24,592 INFO L423 AbstractCegarLoop]: === Iteration 46 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:39:24,592 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:24,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1256845851, now seen corresponding path program 45 times [2018-10-04 14:39:24,592 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:24,592 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:24,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:24,593 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:24,593 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:24,597 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:39:24,597 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:39:24,597 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:39:24,605 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:39:26,705 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 14:39:26,705 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:26,710 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:28,351 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 14:39:28,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:39:28,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-04 14:39:28,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 14:39:28,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 14:39:28,372 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:28,372 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-04 14:39:30,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:30,063 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 14:39:30,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 14:39:30,063 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-04 14:39:30,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:30,064 INFO L225 Difference]: With dead ends: 53 [2018-10-04 14:39:30,064 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 14:39:30,065 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.4s impTime 48 [2018-10-04 14:39:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 14:39:30,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 14:39:30,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 14:39:30,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 14:39:30,068 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-04 14:39:30,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:30,068 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 14:39:30,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 14:39:30,069 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 14:39:30,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 14:39:30,069 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:30,069 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2018-10-04 14:39:30,069 INFO L423 AbstractCegarLoop]: === Iteration 47 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:39:30,070 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:30,070 INFO L82 PathProgramCache]: Analyzing trace with hash -307517692, now seen corresponding path program 46 times [2018-10-04 14:39:30,070 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:30,070 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:30,070 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:30,071 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:30,071 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:30,076 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:39:30,076 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:39:30,077 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 14:39:30,084 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:39:32,414 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:39:32,414 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:32,424 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:34,089 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 14:39:34,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:39:34,109 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-04 14:39:34,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 14:39:34,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 14:39:34,109 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:34,109 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-04 14:39:35,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:35,883 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-04 14:39:35,883 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 14:39:35,884 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-04 14:39:35,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:35,885 INFO L225 Difference]: With dead ends: 54 [2018-10-04 14:39:35,885 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 14:39:35,885 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.5s impTime 49 [2018-10-04 14:39:35,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 14:39:35,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 14:39:35,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 14:39:35,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 14:39:35,890 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-04 14:39:35,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:35,890 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 14:39:35,890 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 14:39:35,890 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 14:39:35,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 14:39:35,890 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:35,890 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1] [2018-10-04 14:39:35,890 INFO L423 AbstractCegarLoop]: === Iteration 48 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:39:35,890 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:35,891 INFO L82 PathProgramCache]: Analyzing trace with hash -943115835, now seen corresponding path program 47 times [2018-10-04 14:39:35,891 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:35,891 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:35,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:35,891 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:35,891 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:35,897 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:39:35,897 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:39:35,897 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 14:39:35,912 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:39:38,833 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 14:39:38,833 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:38,843 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:40,530 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 14:39:40,550 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:39:40,550 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-04 14:39:40,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 14:39:40,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 14:39:40,551 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:40,551 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-04 14:39:42,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:42,382 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 14:39:42,383 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 14:39:42,383 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-04 14:39:42,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:42,384 INFO L225 Difference]: With dead ends: 55 [2018-10-04 14:39:42,384 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 14:39:42,384 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.5s impTime 50 [2018-10-04 14:39:42,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 14:39:42,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 14:39:42,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 14:39:42,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 14:39:42,389 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-04 14:39:42,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:42,389 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 14:39:42,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 14:39:42,390 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 14:39:42,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 14:39:42,390 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:42,390 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1] [2018-10-04 14:39:42,390 INFO L423 AbstractCegarLoop]: === Iteration 49 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:39:42,390 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:42,391 INFO L82 PathProgramCache]: Analyzing trace with hash 828178212, now seen corresponding path program 48 times [2018-10-04 14:39:42,391 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:42,391 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:42,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:42,392 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:42,392 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:42,398 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:39:42,398 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:39:42,398 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 14:39:42,414 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:39:45,279 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 14:39:45,279 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:45,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:47,079 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 14:39:47,098 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:39:47,098 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-04 14:39:47,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 14:39:47,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 14:39:47,099 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:47,099 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-04 14:39:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:49,025 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-04 14:39:49,026 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 14:39:49,026 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-04 14:39:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:49,026 INFO L225 Difference]: With dead ends: 56 [2018-10-04 14:39:49,027 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 14:39:49,028 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.6s impTime 51 [2018-10-04 14:39:49,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 14:39:49,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 14:39:49,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 14:39:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 14:39:49,033 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-04 14:39:49,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:49,033 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 14:39:49,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 14:39:49,033 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 14:39:49,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 14:39:49,034 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:49,034 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1] [2018-10-04 14:39:49,034 INFO L423 AbstractCegarLoop]: === Iteration 50 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:39:49,034 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:49,034 INFO L82 PathProgramCache]: Analyzing trace with hash -96281179, now seen corresponding path program 49 times [2018-10-04 14:39:49,034 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:49,034 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:49,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:49,035 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:39:49,035 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:49,040 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:39:49,040 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:39:49,040 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) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 14:39:49,048 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:39:51,764 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:39:53,792 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 14:39:53,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:39:53,812 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-04 14:39:53,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 14:39:53,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 14:39:53,812 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:39:53,812 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-04 14:39:55,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:39:55,786 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 14:39:55,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 14:39:55,787 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-04 14:39:55,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:39:55,788 INFO L225 Difference]: With dead ends: 57 [2018-10-04 14:39:55,788 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 14:39:55,788 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.8s impTime 52 [2018-10-04 14:39:55,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 14:39:55,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 14:39:55,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 14:39:55,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 14:39:55,792 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-04 14:39:55,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:39:55,792 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 14:39:55,792 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 14:39:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 14:39:55,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 14:39:55,793 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:39:55,793 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1] [2018-10-04 14:39:55,793 INFO L423 AbstractCegarLoop]: === Iteration 51 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:39:55,793 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:39:55,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1310248772, now seen corresponding path program 50 times [2018-10-04 14:39:55,793 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:39:55,793 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:39:55,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:55,794 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:39:55,794 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:39:55,800 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:39:55,800 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:39:55,800 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 14:39:55,814 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:39:58,518 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:39:58,518 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:39:58,528 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:00,424 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 14:40:00,444 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:40:00,445 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-04 14:40:00,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 14:40:00,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 14:40:00,445 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:00,445 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-04 14:40:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:02,529 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-04 14:40:02,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 14:40:02,529 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-04 14:40:02,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:02,530 INFO L225 Difference]: With dead ends: 58 [2018-10-04 14:40:02,530 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 14:40:02,531 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.7s impTime 53 [2018-10-04 14:40:02,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 14:40:02,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 14:40:02,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 14:40:02,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 14:40:02,535 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-04 14:40:02,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:02,535 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 14:40:02,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 14:40:02,535 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 14:40:02,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 14:40:02,535 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:02,536 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1] [2018-10-04 14:40:02,536 INFO L423 AbstractCegarLoop]: === Iteration 52 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:40:02,536 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:02,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1963004293, now seen corresponding path program 51 times [2018-10-04 14:40:02,536 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:02,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:02,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:02,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:02,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:02,542 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:40:02,542 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:40:02,543 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 14:40:02,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:40:05,776 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 14:40:05,776 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:05,782 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:07,740 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 14:40:07,760 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:40:07,761 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-04 14:40:07,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 14:40:07,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 14:40:07,761 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:07,761 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-04 14:40:09,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:09,901 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 14:40:09,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 14:40:09,901 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-04 14:40:09,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:09,902 INFO L225 Difference]: With dead ends: 59 [2018-10-04 14:40:09,902 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 14:40:09,902 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s Time 1.8s impTime 54 [2018-10-04 14:40:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 14:40:09,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 14:40:09,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 14:40:09,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 14:40:09,907 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-04 14:40:09,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:09,908 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 14:40:09,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 14:40:09,908 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 14:40:09,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 14:40:09,908 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:09,908 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1] [2018-10-04 14:40:09,908 INFO L423 AbstractCegarLoop]: === Iteration 53 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:40:09,908 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:09,908 INFO L82 PathProgramCache]: Analyzing trace with hash 723588964, now seen corresponding path program 52 times [2018-10-04 14:40:09,909 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:09,909 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:09,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:09,909 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:09,909 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:09,915 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:40:09,915 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:40:09,915 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 14:40:09,924 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:40:13,098 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:40:13,098 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:13,111 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:15,157 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 14:40:15,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:40:15,177 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-04 14:40:15,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 14:40:15,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 14:40:15,177 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:15,177 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-04 14:40:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:17,388 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-04 14:40:17,388 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 14:40:17,389 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-04 14:40:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:17,390 INFO L225 Difference]: With dead ends: 60 [2018-10-04 14:40:17,390 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 14:40:17,390 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.9s impTime 55 [2018-10-04 14:40:17,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 14:40:17,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 14:40:17,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 14:40:17,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 14:40:17,395 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-04 14:40:17,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:17,395 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 14:40:17,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 14:40:17,395 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 14:40:17,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 14:40:17,395 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:17,396 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1] [2018-10-04 14:40:17,396 INFO L423 AbstractCegarLoop]: === Iteration 54 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:40:17,396 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:17,396 INFO L82 PathProgramCache]: Analyzing trace with hash 956419429, now seen corresponding path program 53 times [2018-10-04 14:40:17,396 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:17,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:17,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:17,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:17,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:17,403 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:40:17,403 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:40:17,403 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 14:40:17,410 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:40:21,386 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 14:40:21,386 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:21,400 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:23,501 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 14:40:23,521 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:40:23,521 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-04 14:40:23,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 14:40:23,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 14:40:23,522 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:23,522 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-04 14:40:25,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:25,832 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 14:40:25,832 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 14:40:25,832 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-04 14:40:25,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:25,833 INFO L225 Difference]: With dead ends: 61 [2018-10-04 14:40:25,833 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 14:40:25,833 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.9s impTime 56 [2018-10-04 14:40:25,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 14:40:25,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 14:40:25,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 14:40:25,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 14:40:25,838 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-04 14:40:25,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:25,838 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 14:40:25,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 14:40:25,838 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 14:40:25,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 14:40:25,839 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:25,839 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1] [2018-10-04 14:40:25,839 INFO L423 AbstractCegarLoop]: === Iteration 55 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:40:25,839 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:25,839 INFO L82 PathProgramCache]: Analyzing trace with hash -415770748, now seen corresponding path program 54 times [2018-10-04 14:40:25,839 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:25,839 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:25,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:25,840 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:25,840 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:25,846 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:40:25,847 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:40:25,847 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 14:40:25,863 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:40:30,186 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 14:40:30,187 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:30,194 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:32,373 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 14:40:32,394 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:40:32,394 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-04 14:40:32,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 14:40:32,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 14:40:32,394 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:32,395 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-04 14:40:34,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:34,791 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-04 14:40:34,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 14:40:34,791 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-04 14:40:34,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:34,792 INFO L225 Difference]: With dead ends: 62 [2018-10-04 14:40:34,792 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 14:40:34,792 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 2.0s impTime 57 [2018-10-04 14:40:34,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 14:40:34,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 14:40:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 14:40:34,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 14:40:34,797 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-04 14:40:34,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:34,797 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 14:40:34,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 14:40:34,797 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 14:40:34,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 14:40:34,797 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:34,797 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1] [2018-10-04 14:40:34,797 INFO L423 AbstractCegarLoop]: === Iteration 56 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:40:34,798 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:34,798 INFO L82 PathProgramCache]: Analyzing trace with hash -3993275, now seen corresponding path program 55 times [2018-10-04 14:40:34,798 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:34,798 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:34,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:34,798 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:34,798 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:34,804 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:40:34,804 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:40:34,804 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 14:40:34,821 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:40:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:40:38,475 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:40,768 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 14:40:40,788 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:40:40,788 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-04 14:40:40,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 14:40:40,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 14:40:40,789 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:40,789 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-04 14:40:43,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:43,226 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 14:40:43,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 14:40:43,227 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-04 14:40:43,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:43,228 INFO L225 Difference]: With dead ends: 63 [2018-10-04 14:40:43,228 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 14:40:43,228 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 2.1s impTime 58 [2018-10-04 14:40:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 14:40:43,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 14:40:43,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 14:40:43,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 14:40:43,234 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-04 14:40:43,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:43,234 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 14:40:43,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 14:40:43,234 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 14:40:43,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 14:40:43,234 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:43,235 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1] [2018-10-04 14:40:43,235 INFO L423 AbstractCegarLoop]: === Iteration 57 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:40:43,235 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:43,235 INFO L82 PathProgramCache]: Analyzing trace with hash -123793500, now seen corresponding path program 56 times [2018-10-04 14:40:43,235 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:43,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:43,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:43,236 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:40:43,236 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:43,241 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:40:43,241 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:40:43,242 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:40:43,256 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:40:47,087 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:40:47,087 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:47,102 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:49,496 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 14:40:49,515 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:40:49,516 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-04 14:40:49,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 14:40:49,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 14:40:49,516 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:49,516 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-04 14:40:52,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:40:52,053 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-04 14:40:52,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 14:40:52,054 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-04 14:40:52,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:40:52,054 INFO L225 Difference]: With dead ends: 64 [2018-10-04 14:40:52,054 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 14:40:52,055 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.1s impTime 59 [2018-10-04 14:40:52,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 14:40:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 14:40:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 14:40:52,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 14:40:52,061 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-04 14:40:52,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:40:52,061 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 14:40:52,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 14:40:52,061 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 14:40:52,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 14:40:52,062 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:40:52,062 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1] [2018-10-04 14:40:52,062 INFO L423 AbstractCegarLoop]: === Iteration 58 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:40:52,062 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:40:52,062 INFO L82 PathProgramCache]: Analyzing trace with hash 457366821, now seen corresponding path program 57 times [2018-10-04 14:40:52,062 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:40:52,062 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:40:52,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:52,063 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:40:52,063 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:40:52,069 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:40:52,069 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:40:52,069 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 14:40:52,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:40:57,122 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 14:40:57,122 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:40:57,129 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:40:59,816 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 14:40:59,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:40:59,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-04 14:40:59,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 14:40:59,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 14:40:59,836 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:40:59,836 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-04 14:41:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:02,448 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 14:41:02,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 14:41:02,448 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-04 14:41:02,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:02,449 INFO L225 Difference]: With dead ends: 65 [2018-10-04 14:41:02,449 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 14:41:02,449 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.5s impTime 60 [2018-10-04 14:41:02,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 14:41:02,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 14:41:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 14:41:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 14:41:02,455 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-04 14:41:02,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:02,456 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 14:41:02,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 14:41:02,456 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 14:41:02,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 14:41:02,456 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:02,456 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1] [2018-10-04 14:41:02,457 INFO L423 AbstractCegarLoop]: === Iteration 59 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:41:02,457 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:02,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1293467588, now seen corresponding path program 58 times [2018-10-04 14:41:02,457 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:02,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:02,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:02,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:02,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:02,464 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:41:02,465 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:41:02,465 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 14:41:02,478 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 14:41:07,134 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:41:07,135 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:07,151 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:09,716 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 14:41:09,736 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:41:09,736 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-04 14:41:09,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 14:41:09,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 14:41:09,737 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:09,737 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-04 14:41:12,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:12,484 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-04 14:41:12,484 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 14:41:12,484 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-04 14:41:12,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:12,485 INFO L225 Difference]: With dead ends: 66 [2018-10-04 14:41:12,485 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 14:41:12,485 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.3s impTime 61 [2018-10-04 14:41:12,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 14:41:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 14:41:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 14:41:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 14:41:12,491 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-04 14:41:12,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:12,491 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 14:41:12,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 14:41:12,491 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 14:41:12,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 14:41:12,491 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:12,492 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1] [2018-10-04 14:41:12,492 INFO L423 AbstractCegarLoop]: === Iteration 60 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:41:12,492 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:12,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1442787589, now seen corresponding path program 59 times [2018-10-04 14:41:12,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:12,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:12,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:12,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:12,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:12,501 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:41:12,502 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:41:12,502 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 14:41:12,527 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 14:41:18,813 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 14:41:18,813 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:18,830 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:21,482 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 14:41:21,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:41:21,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-04 14:41:21,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 14:41:21,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 14:41:21,502 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:21,502 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-04 14:41:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:24,313 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 14:41:24,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 14:41:24,314 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-04 14:41:24,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:24,314 INFO L225 Difference]: With dead ends: 67 [2018-10-04 14:41:24,314 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 14:41:24,315 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.4s impTime 62 [2018-10-04 14:41:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 14:41:24,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 14:41:24,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 14:41:24,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 14:41:24,319 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-04 14:41:24,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:24,320 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 14:41:24,320 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 14:41:24,320 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 14:41:24,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 14:41:24,320 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:24,320 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1] [2018-10-04 14:41:24,321 INFO L423 AbstractCegarLoop]: === Iteration 61 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:41:24,321 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:24,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1776740324, now seen corresponding path program 60 times [2018-10-04 14:41:24,321 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:24,321 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:24,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:24,322 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:24,322 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:24,329 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:41:24,329 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:41:24,329 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 14:41:24,342 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 14:41:30,497 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 14:41:30,498 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:30,507 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:33,146 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 14:41:33,165 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:41:33,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-04 14:41:33,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 14:41:33,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 14:41:33,166 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:33,166 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-04 14:41:36,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:36,036 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-04 14:41:36,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 14:41:36,037 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-04 14:41:36,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:36,037 INFO L225 Difference]: With dead ends: 68 [2018-10-04 14:41:36,037 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 14:41:36,038 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.5s impTime 63 [2018-10-04 14:41:36,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 14:41:36,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 14:41:36,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 14:41:36,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 14:41:36,043 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-04 14:41:36,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:36,043 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 14:41:36,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 14:41:36,043 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 14:41:36,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 14:41:36,044 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:36,044 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1] [2018-10-04 14:41:36,044 INFO L423 AbstractCegarLoop]: === Iteration 62 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:41:36,044 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:36,044 INFO L82 PathProgramCache]: Analyzing trace with hash -755626779, now seen corresponding path program 61 times [2018-10-04 14:41:36,044 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:36,044 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:36,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:36,045 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:36,045 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:36,050 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:41:36,050 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:41:36,050 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 14:41:36,064 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:41:41,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 14:41:41,691 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:44,422 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 14:41:44,442 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:41:44,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-04 14:41:44,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 14:41:44,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 14:41:44,443 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:44,443 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-04 14:41:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:47,417 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 14:41:47,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 14:41:47,417 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-04 14:41:47,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:47,418 INFO L225 Difference]: With dead ends: 69 [2018-10-04 14:41:47,418 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 14:41:47,419 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.5s impTime 64 [2018-10-04 14:41:47,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 14:41:47,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 14:41:47,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 14:41:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 14:41:47,424 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-04 14:41:47,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:47,424 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 14:41:47,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 14:41:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 14:41:47,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 14:41:47,425 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:47,425 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1] [2018-10-04 14:41:47,425 INFO L423 AbstractCegarLoop]: === Iteration 63 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:41:47,425 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:47,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1949595644, now seen corresponding path program 62 times [2018-10-04 14:41:47,425 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:47,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:47,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:47,426 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 14:41:47,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:47,432 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:41:47,432 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:41:47,432 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 14:41:47,453 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 14:41:53,444 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 14:41:53,444 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:41:53,463 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:41:56,254 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 14:41:56,274 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:41:56,274 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-04 14:41:56,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 14:41:56,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 14:41:56,275 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:41:56,275 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-04 14:41:59,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:41:59,310 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-04 14:41:59,311 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 14:41:59,311 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-04 14:41:59,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:41:59,312 INFO L225 Difference]: With dead ends: 70 [2018-10-04 14:41:59,312 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 14:41:59,312 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.6s impTime 65 [2018-10-04 14:41:59,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 14:41:59,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 14:41:59,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 14:41:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 14:41:59,318 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-04 14:41:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:41:59,318 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 14:41:59,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 14:41:59,318 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 14:41:59,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 14:41:59,319 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:41:59,319 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1] [2018-10-04 14:41:59,319 INFO L423 AbstractCegarLoop]: === Iteration 64 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:41:59,319 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:41:59,319 INFO L82 PathProgramCache]: Analyzing trace with hash -307924795, now seen corresponding path program 63 times [2018-10-04 14:41:59,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:41:59,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:41:59,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:59,320 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:41:59,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:41:59,325 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:41:59,325 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:41:59,325 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 14:41:59,335 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 14:42:07,227 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 14:42:07,227 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:42:07,236 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:42:10,352 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 14:42:10,371 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 14:42:10,371 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-04 14:42:10,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 14:42:10,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 14:42:10,372 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 14:42:10,372 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-04 14:42:13,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 14:42:13,504 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 14:42:13,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 14:42:13,504 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-04 14:42:13,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 14:42:13,505 INFO L225 Difference]: With dead ends: 71 [2018-10-04 14:42:13,506 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 14:42:13,506 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s Time 2.8s impTime 66 [2018-10-04 14:42:13,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 14:42:13,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 14:42:13,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 14:42:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 14:42:13,512 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-04 14:42:13,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 14:42:13,512 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 14:42:13,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 14:42:13,512 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 14:42:13,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 14:42:13,513 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 14:42:13,513 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1] [2018-10-04 14:42:13,513 INFO L423 AbstractCegarLoop]: === Iteration 65 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 14:42:13,513 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 14:42:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash -955736028, now seen corresponding path program 64 times [2018-10-04 14:42:13,514 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 14:42:13,514 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 14:42:13,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:42:13,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 14:42:13,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 14:42:13,521 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 14:42:13,522 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 14:42:13,522 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 14:42:13,549 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Received shutdown request... [2018-10-04 14:42:20,533 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 14:42:20,533 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 14:42:20,553 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 14:42:20,618 INFO L177 TraceCheckSpWp]: Timeout while computing interpolants [2018-10-04 14:42:20,819 WARN L521 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 14:42:20,819 WARN L549 AbstractCegarLoop]: Verification canceled [2018-10-04 14:42:20,824 WARN L205 ceAbstractionStarter]: Timeout [2018-10-04 14:42:20,824 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.10 02:42:20 BoogieIcfgContainer [2018-10-04 14:42:20,824 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-10-04 14:42:20,825 INFO L168 Benchmark]: Toolchain (without parser) took 263625.01 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 73.4 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -77.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:42:20,828 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:42:20,829 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.00 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 14:42:20,830 INFO L168 Benchmark]: Boogie Preprocessor took 22.76 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 14:42:20,830 INFO L168 Benchmark]: RCFGBuilder took 258.71 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 14:42:20,831 INFO L168 Benchmark]: TraceAbstraction took 263297.09 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 73.4 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -98.5 MB). There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 14:42:20,835 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.5 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 42.00 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 22.76 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 258.71 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 263297.09 ms. Allocated memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: 73.4 MB). Free memory was 1.5 GB in the beginning and 1.6 GB in the end (delta: -98.5 MB). There was no memory consumed. 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 analyzing trace of length 69 with TraceHistMax 64, while TraceCheckSpWp was constructing forward predicates, while XnfDer was eliminating 1 quantified variables from 2 xjuncts. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. TIMEOUT Result, 263.2s OverallTime, 65 OverallIterations, 64 TraceHistogramMax, 76.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 190 SDtfs, 71 SDslu, 64 SDs, 0 SdLazy, 100101 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 62.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2272 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 2209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 76.7s 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, 99.8s SatisfiabilityAnalysisTime, 75.9s InterpolantComputationTime, 2272 NumberOfCodeBlocks, 2272 NumberOfCodeBlocksAsserted, 592 NumberOfCheckSat, 2208 ConstructedInterpolants, 0 QuantifiedInterpolants, 1051678 SizeOfPredicates, 64 NumberOfNonLiveVariables, 10656 ConjunctsInSsa, 8448 ConjunctsInUnsatCore, 64 InterpolantComputations, 1 PerfectInterpolantSequences, 0/43680 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_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_14-42-20-857.csv Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/Mult1-Safe.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-TraceAbstractionBenchmarks-0-2018-10-04_14-42-20-857.csv Completed graceful shutdown