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 [2018-10-04 12:58:43,227 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:58:43,229 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:58:43,241 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:58:43,242 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:58:43,243 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:58:43,244 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:58:43,246 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:58:43,247 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:58:43,248 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:58:43,249 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 12:58:43,250 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 12:58:43,250 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 12:58:43,251 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 12:58:43,253 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 12:58:43,253 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 12:58:43,254 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 12:58:43,256 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 12:58:43,258 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 12:58:43,260 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 12:58:43,261 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 12:58:43,262 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 12:58:43,264 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2018-10-04 12:58:43,273 INFO L98 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf [2018-10-04 12:58:43,299 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:58:43,301 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:58:43,302 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:58:43,303 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:58:43,303 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:58:43,303 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:58:43,303 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:58:43,307 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:58:43,307 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:58:43,307 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:58:43,307 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:58:43,308 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:58:43,308 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:58:43,308 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:58:43,308 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:58:43,308 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:58:43,308 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:58:43,310 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:58:43,310 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:58:43,310 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:58:43,311 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:58:43,311 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:58:43,311 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:58:43,311 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:58:43,311 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:58:43,312 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:58:43,312 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:58:43,312 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:58:43,312 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:58:43,312 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:58:43,312 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 12:58:43,392 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:58:43,407 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:58:43,412 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:58:43,414 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:58:43,415 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:58:43,415 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl [2018-10-04 12:58:43,416 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/toy/nonlinear/Mult1-Safe.bpl' [2018-10-04 12:58:43,466 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:58:43,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:58:43,468 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:58:43,468 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:58:43,468 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:58:43,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:43" (1/1) ... [2018-10-04 12:58:43,501 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:43" (1/1) ... [2018-10-04 12:58:43,506 WARN L165 Inliner]: Program contained no entry procedure! [2018-10-04 12:58:43,506 WARN L168 Inliner]: Missing entry procedures: [ULTIMATE.start] [2018-10-04 12:58:43,506 WARN L175 Inliner]: Fallback enabled. All procedures will be processed. [2018-10-04 12:58:43,508 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:58:43,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:58:43,509 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:58:43,509 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:58:43,519 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:43" (1/1) ... [2018-10-04 12:58:43,519 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:43" (1/1) ... [2018-10-04 12:58:43,520 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:43" (1/1) ... [2018-10-04 12:58:43,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:43" (1/1) ... [2018-10-04 12:58:43,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:43" (1/1) ... [2018-10-04 12:58:43,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:43" (1/1) ... [2018-10-04 12:58:43,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:43" (1/1) ... [2018-10-04 12:58:43,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:58:43,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:58:43,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:58:43,529 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:58:43,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:58:43,601 INFO L124 BoogieDeclarations]: Specification and implementation of procedure mult given in one single declaration [2018-10-04 12:58:43,602 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2018-10-04 12:58:43,602 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2018-10-04 12:58:43,663 WARN L632 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2018-10-04 12:58:43,788 INFO L338 CfgBuilder]: Using library mode [2018-10-04 12:58:43,788 INFO L202 PluginConnector]: Adding new model Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:58:43 BoogieIcfgContainer [2018-10-04 12:58:43,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:58:43,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:58:43,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:58:43,794 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:58:43,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:58:43" (1/2) ... [2018-10-04 12:58:43,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c976ccf and model type Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:58:43, skipping insertion in model container [2018-10-04 12:58:43,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "Mult1-Safe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:58:43" (2/2) ... [2018-10-04 12:58:43,798 INFO L112 eAbstractionObserver]: Analyzing ICFG Mult1-Safe.bpl [2018-10-04 12:58:43,810 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:58:43,822 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:58:43,880 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:58:43,881 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:58:43,881 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:58:43,882 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:58:43,882 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:58:43,882 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:58:43,882 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:58:43,882 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:58:43,883 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:58:43,900 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states. [2018-10-04 12:58:43,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2018-10-04 12:58:43,916 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:43,917 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2018-10-04 12:58:43,918 INFO L423 AbstractCegarLoop]: === Iteration 1 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:43,927 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:43,928 INFO L82 PathProgramCache]: Analyzing trace with hash 924708, now seen corresponding path program 1 times [2018-10-04 12:58:43,930 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:43,931 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:43,990 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:43,990 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:43,991 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:44,030 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:44,030 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:44,030 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) [2018-10-04 12:58:44,050 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:44,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:44,083 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:44,233 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:58:44,234 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:58:44,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:58:44,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:58:44,250 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:44,252 INFO L87 Difference]: Start difference. First operand 6 states. Second operand 5 states. [2018-10-04 12:58:44,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:44,478 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 12:58:44,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:58:44,481 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2018-10-04 12:58:44,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:44,492 INFO L225 Difference]: With dead ends: 10 [2018-10-04 12:58:44,493 INFO L226 Difference]: Without dead ends: 6 [2018-10-04 12:58:44,496 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 3 [2018-10-04 12:58:44,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2018-10-04 12:58:44,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2018-10-04 12:58:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2018-10-04 12:58:44,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2018-10-04 12:58:44,531 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2018-10-04 12:58:44,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:44,532 INFO L480 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2018-10-04 12:58:44,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:58:44,532 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2018-10-04 12:58:44,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2018-10-04 12:58:44,533 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:44,533 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2018-10-04 12:58:44,534 INFO L423 AbstractCegarLoop]: === Iteration 2 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:44,534 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:44,534 INFO L82 PathProgramCache]: Analyzing trace with hash 28663973, now seen corresponding path program 1 times [2018-10-04 12:58:44,534 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:44,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:44,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:44,536 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:44,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:44,540 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:44,541 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:44,541 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:44,554 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:44,563 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:44,654 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:44,654 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2018-10-04 12:58:44,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:58:44,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:58:44,657 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:44,657 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 5 states. [2018-10-04 12:58:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:44,769 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2018-10-04 12:58:44,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2018-10-04 12:58:44,770 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 5 [2018-10-04 12:58:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:44,771 INFO L225 Difference]: With dead ends: 9 [2018-10-04 12:58:44,771 INFO L226 Difference]: Without dead ends: 7 [2018-10-04 12:58:44,772 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 12:58:44,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2018-10-04 12:58:44,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2018-10-04 12:58:44,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2018-10-04 12:58:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2018-10-04 12:58:44,775 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2018-10-04 12:58:44,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:44,776 INFO L480 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2018-10-04 12:58:44,776 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:58:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2018-10-04 12:58:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:58:44,777 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:44,777 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2018-10-04 12:58:44,777 INFO L423 AbstractCegarLoop]: === Iteration 3 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:44,778 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:44,778 INFO L82 PathProgramCache]: Analyzing trace with hash 888581188, now seen corresponding path program 2 times [2018-10-04 12:58:44,778 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:44,778 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:44,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:44,779 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:44,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:44,785 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:44,785 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:44,785 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:44,805 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:44,818 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:44,818 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:44,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:45,126 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:45,126 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2018-10-04 12:58:45,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-10-04 12:58:45,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-10-04 12:58:45,127 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:45,127 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2018-10-04 12:58:45,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:45,221 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2018-10-04 12:58:45,225 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:58:45,225 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2018-10-04 12:58:45,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:45,226 INFO L225 Difference]: With dead ends: 10 [2018-10-04 12:58:45,226 INFO L226 Difference]: Without dead ends: 8 [2018-10-04 12:58:45,227 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time 0.2s impTime 5 [2018-10-04 12:58:45,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2018-10-04 12:58:45,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2018-10-04 12:58:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2018-10-04 12:58:45,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2018-10-04 12:58:45,231 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2018-10-04 12:58:45,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:45,231 INFO L480 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2018-10-04 12:58:45,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-10-04 12:58:45,232 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2018-10-04 12:58:45,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2018-10-04 12:58:45,232 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:45,233 INFO L375 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2018-10-04 12:58:45,233 INFO L423 AbstractCegarLoop]: === Iteration 4 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:45,233 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:45,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1776211077, now seen corresponding path program 3 times [2018-10-04 12:58:45,234 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:45,234 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:45,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:45,235 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:45,235 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:45,243 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:45,244 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:45,244 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:45,257 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:45,267 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2018-10-04 12:58:45,267 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:45,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:45,405 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:45,405 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2018-10-04 12:58:45,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2018-10-04 12:58:45,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2018-10-04 12:58:45,406 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:45,406 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 7 states. [2018-10-04 12:58:45,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:45,686 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2018-10-04 12:58:45,686 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-10-04 12:58:45,687 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 7 [2018-10-04 12:58:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:45,687 INFO L225 Difference]: With dead ends: 11 [2018-10-04 12:58:45,688 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:58:45,688 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 12:58:45,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:58:45,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:58:45,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:58:45,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2018-10-04 12:58:45,692 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2018-10-04 12:58:45,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:45,692 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2018-10-04 12:58:45,692 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2018-10-04 12:58:45,692 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2018-10-04 12:58:45,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:58:45,693 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:45,693 INFO L375 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2018-10-04 12:58:45,693 INFO L423 AbstractCegarLoop]: === Iteration 5 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:45,694 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:45,694 INFO L82 PathProgramCache]: Analyzing trace with hash -772033436, now seen corresponding path program 4 times [2018-10-04 12:58:45,694 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:45,694 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:45,695 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:45,695 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:45,696 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:45,703 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:45,704 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:45,704 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:45,712 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:45,721 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:45,721 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:45,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:45,858 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:45,858 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2018-10-04 12:58:45,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2018-10-04 12:58:45,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2018-10-04 12:58:45,859 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:45,859 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 8 states. [2018-10-04 12:58:46,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:46,016 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2018-10-04 12:58:46,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2018-10-04 12:58:46,017 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2018-10-04 12:58:46,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:46,017 INFO L225 Difference]: With dead ends: 12 [2018-10-04 12:58:46,018 INFO L226 Difference]: Without dead ends: 10 [2018-10-04 12:58:46,018 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 12:58:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2018-10-04 12:58:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2018-10-04 12:58:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2018-10-04 12:58:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2018-10-04 12:58:46,021 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2018-10-04 12:58:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:46,022 INFO L480 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2018-10-04 12:58:46,022 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2018-10-04 12:58:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2018-10-04 12:58:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2018-10-04 12:58:46,023 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:46,023 INFO L375 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1] [2018-10-04 12:58:46,023 INFO L423 AbstractCegarLoop]: === Iteration 6 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:46,023 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:46,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1836765285, now seen corresponding path program 5 times [2018-10-04 12:58:46,023 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:46,024 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:46,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:46,025 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:46,025 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:46,033 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:46,033 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:46,033 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:46,052 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:46,069 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2018-10-04 12:58:46,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:46,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:46,579 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:46,579 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2018-10-04 12:58:46,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2018-10-04 12:58:46,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2018-10-04 12:58:46,580 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:46,580 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2018-10-04 12:58:46,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:46,762 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2018-10-04 12:58:46,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2018-10-04 12:58:46,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2018-10-04 12:58:46,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:46,764 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:58:46,764 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:58:46,765 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 8 [2018-10-04 12:58:46,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:58:46,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:58:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:58:46,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2018-10-04 12:58:46,769 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2018-10-04 12:58:46,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:46,769 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2018-10-04 12:58:46,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2018-10-04 12:58:46,770 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2018-10-04 12:58:46,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:58:46,770 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:46,770 INFO L375 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2018-10-04 12:58:46,771 INFO L423 AbstractCegarLoop]: === Iteration 7 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:46,771 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:46,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1105147012, now seen corresponding path program 6 times [2018-10-04 12:58:46,771 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:46,772 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:46,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:46,773 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:46,773 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:46,786 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:46,786 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:46,786 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:46,798 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:46,815 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2018-10-04 12:58:46,815 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:46,818 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:46,983 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:46,983 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2018-10-04 12:58:46,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2018-10-04 12:58:46,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2018-10-04 12:58:46,984 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:46,984 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 10 states. [2018-10-04 12:58:47,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:47,134 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2018-10-04 12:58:47,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2018-10-04 12:58:47,135 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2018-10-04 12:58:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:47,136 INFO L225 Difference]: With dead ends: 14 [2018-10-04 12:58:47,136 INFO L226 Difference]: Without dead ends: 12 [2018-10-04 12:58:47,137 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 12:58:47,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2018-10-04 12:58:47,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2018-10-04 12:58:47,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2018-10-04 12:58:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2018-10-04 12:58:47,141 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2018-10-04 12:58:47,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:47,142 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2018-10-04 12:58:47,142 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2018-10-04 12:58:47,142 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2018-10-04 12:58:47,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2018-10-04 12:58:47,143 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:47,143 INFO L375 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1] [2018-10-04 12:58:47,143 INFO L423 AbstractCegarLoop]: === Iteration 8 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:47,143 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:47,143 INFO L82 PathProgramCache]: Analyzing trace with hash -100182971, now seen corresponding path program 7 times [2018-10-04 12:58:47,144 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:47,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:47,144 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:47,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:47,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:47,156 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:47,156 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:47,156 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:47,167 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:47,185 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:47,347 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:47,347 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2018-10-04 12:58:47,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-10-04 12:58:47,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-10-04 12:58:47,348 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:47,348 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2018-10-04 12:58:47,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:47,505 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2018-10-04 12:58:47,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2018-10-04 12:58:47,506 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2018-10-04 12:58:47,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:47,506 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:58:47,507 INFO L226 Difference]: Without dead ends: 13 [2018-10-04 12:58:47,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 10 [2018-10-04 12:58:47,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2018-10-04 12:58:47,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2018-10-04 12:58:47,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2018-10-04 12:58:47,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2018-10-04 12:58:47,511 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2018-10-04 12:58:47,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:47,512 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2018-10-04 12:58:47,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-10-04 12:58:47,512 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2018-10-04 12:58:47,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2018-10-04 12:58:47,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:47,512 INFO L375 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1] [2018-10-04 12:58:47,513 INFO L423 AbstractCegarLoop]: === Iteration 9 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:47,513 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:47,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1189293220, now seen corresponding path program 8 times [2018-10-04 12:58:47,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:47,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:47,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:47,514 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:47,515 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:47,523 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:47,523 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:47,523 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:47,535 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:47,557 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:47,558 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:47,560 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:47,795 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:47,816 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:47,816 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2018-10-04 12:58:47,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2018-10-04 12:58:47,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2018-10-04 12:58:47,817 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:47,817 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2018-10-04 12:58:48,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:48,015 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2018-10-04 12:58:48,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2018-10-04 12:58:48,016 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2018-10-04 12:58:48,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:48,017 INFO L225 Difference]: With dead ends: 16 [2018-10-04 12:58:48,018 INFO L226 Difference]: Without dead ends: 14 [2018-10-04 12:58:48,018 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 12:58:48,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2018-10-04 12:58:48,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2018-10-04 12:58:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2018-10-04 12:58:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2018-10-04 12:58:48,024 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2018-10-04 12:58:48,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:48,024 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2018-10-04 12:58:48,024 INFO L481 AbstractCegarLoop]: Interpolant automaton has 12 states. [2018-10-04 12:58:48,025 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2018-10-04 12:58:48,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2018-10-04 12:58:48,025 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:48,025 INFO L375 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1] [2018-10-04 12:58:48,025 INFO L423 AbstractCegarLoop]: === Iteration 10 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:48,026 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:48,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1786617819, now seen corresponding path program 9 times [2018-10-04 12:58:48,026 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:48,026 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:48,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:48,027 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:48,027 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:48,037 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:48,037 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:48,037 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:48,049 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:48,072 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2018-10-04 12:58:48,073 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:48,075 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:48,398 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:48,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2018-10-04 12:58:48,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2018-10-04 12:58:48,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2018-10-04 12:58:48,399 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:48,399 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 13 states. [2018-10-04 12:58:48,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:48,605 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2018-10-04 12:58:48,605 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2018-10-04 12:58:48,605 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2018-10-04 12:58:48,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:48,606 INFO L225 Difference]: With dead ends: 17 [2018-10-04 12:58:48,607 INFO L226 Difference]: Without dead ends: 15 [2018-10-04 12:58:48,607 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time 0.2s impTime 12 [2018-10-04 12:58:48,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2018-10-04 12:58:48,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2018-10-04 12:58:48,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2018-10-04 12:58:48,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2018-10-04 12:58:48,612 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2018-10-04 12:58:48,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:48,612 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2018-10-04 12:58:48,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 13 states. [2018-10-04 12:58:48,612 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2018-10-04 12:58:48,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2018-10-04 12:58:48,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:48,613 INFO L375 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2018-10-04 12:58:48,613 INFO L423 AbstractCegarLoop]: === Iteration 11 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:48,613 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:48,613 INFO L82 PathProgramCache]: Analyzing trace with hash 449420484, now seen corresponding path program 10 times [2018-10-04 12:58:48,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:48,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:48,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:48,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:48,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:48,624 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:48,624 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:48,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:48,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:48,662 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:48,662 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:48,664 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:48,923 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:48,923 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2018-10-04 12:58:48,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2018-10-04 12:58:48,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2018-10-04 12:58:48,924 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:48,924 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 14 states. [2018-10-04 12:58:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:49,423 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2018-10-04 12:58:49,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2018-10-04 12:58:49,424 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 14 [2018-10-04 12:58:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:49,425 INFO L225 Difference]: With dead ends: 18 [2018-10-04 12:58:49,425 INFO L226 Difference]: Without dead ends: 16 [2018-10-04 12:58:49,426 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.2s impTime 13 [2018-10-04 12:58:49,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2018-10-04 12:58:49,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2018-10-04 12:58:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2018-10-04 12:58:49,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2018-10-04 12:58:49,430 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2018-10-04 12:58:49,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:49,431 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2018-10-04 12:58:49,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2018-10-04 12:58:49,431 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2018-10-04 12:58:49,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2018-10-04 12:58:49,432 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:49,432 INFO L375 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1] [2018-10-04 12:58:49,432 INFO L423 AbstractCegarLoop]: === Iteration 12 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:49,432 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:49,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1047131141, now seen corresponding path program 11 times [2018-10-04 12:58:49,433 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:49,433 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:49,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:49,434 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:49,434 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:49,449 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:49,449 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:49,450 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:49,458 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:49,497 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2018-10-04 12:58:49,497 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:49,500 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:49,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:49,759 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2018-10-04 12:58:49,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2018-10-04 12:58:49,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2018-10-04 12:58:49,759 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:49,760 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 15 states. [2018-10-04 12:58:50,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:50,126 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2018-10-04 12:58:50,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-10-04 12:58:50,127 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 15 [2018-10-04 12:58:50,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:50,128 INFO L225 Difference]: With dead ends: 19 [2018-10-04 12:58:50,128 INFO L226 Difference]: Without dead ends: 17 [2018-10-04 12:58:50,129 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 12:58:50,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2018-10-04 12:58:50,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2018-10-04 12:58:50,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2018-10-04 12:58:50,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2018-10-04 12:58:50,134 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2018-10-04 12:58:50,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:50,134 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2018-10-04 12:58:50,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 15 states. [2018-10-04 12:58:50,135 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2018-10-04 12:58:50,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2018-10-04 12:58:50,135 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:50,136 INFO L375 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1] [2018-10-04 12:58:50,136 INFO L423 AbstractCegarLoop]: === Iteration 13 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:50,136 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:50,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1898674972, now seen corresponding path program 12 times [2018-10-04 12:58:50,136 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:50,137 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:50,137 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:50,138 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:50,138 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:50,147 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:50,147 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:50,147 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:50,165 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:50,218 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2018-10-04 12:58:50,218 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:50,220 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:50,468 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:50,468 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2018-10-04 12:58:50,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2018-10-04 12:58:50,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2018-10-04 12:58:50,469 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:50,469 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 16 states. [2018-10-04 12:58:50,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:50,780 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2018-10-04 12:58:50,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-10-04 12:58:50,780 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 16 [2018-10-04 12:58:50,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:50,781 INFO L225 Difference]: With dead ends: 20 [2018-10-04 12:58:50,781 INFO L226 Difference]: Without dead ends: 18 [2018-10-04 12:58:50,781 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 12:58:50,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2018-10-04 12:58:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2018-10-04 12:58:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2018-10-04 12:58:50,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2018-10-04 12:58:50,786 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2018-10-04 12:58:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:50,786 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2018-10-04 12:58:50,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has 16 states. [2018-10-04 12:58:50,787 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2018-10-04 12:58:50,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2018-10-04 12:58:50,787 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:50,787 INFO L375 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1] [2018-10-04 12:58:50,787 INFO L423 AbstractCegarLoop]: === Iteration 14 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:50,788 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:50,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1270616037, now seen corresponding path program 13 times [2018-10-04 12:58:50,788 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:50,788 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:50,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:50,789 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:50,789 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:50,798 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:50,798 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:50,798 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:50,812 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:50,867 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:51,133 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:51,153 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:51,153 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2018-10-04 12:58:51,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-10-04 12:58:51,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-10-04 12:58:51,154 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:51,154 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 17 states. [2018-10-04 12:58:51,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:51,795 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2018-10-04 12:58:51,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2018-10-04 12:58:51,795 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2018-10-04 12:58:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:51,796 INFO L225 Difference]: With dead ends: 21 [2018-10-04 12:58:51,796 INFO L226 Difference]: Without dead ends: 19 [2018-10-04 12:58:51,797 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 16 [2018-10-04 12:58:51,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2018-10-04 12:58:51,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2018-10-04 12:58:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2018-10-04 12:58:51,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2018-10-04 12:58:51,806 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2018-10-04 12:58:51,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:51,806 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2018-10-04 12:58:51,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-10-04 12:58:51,808 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2018-10-04 12:58:51,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2018-10-04 12:58:51,808 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:51,809 INFO L375 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1] [2018-10-04 12:58:51,809 INFO L423 AbstractCegarLoop]: === Iteration 15 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:51,809 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:51,809 INFO L82 PathProgramCache]: Analyzing trace with hash 734389508, now seen corresponding path program 14 times [2018-10-04 12:58:51,810 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:51,810 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:51,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:51,811 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:51,811 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:51,833 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:51,834 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:51,834 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:51,856 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:58:51,940 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:58:51,940 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:51,943 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:52,926 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:52,926 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2018-10-04 12:58:52,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2018-10-04 12:58:52,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2018-10-04 12:58:52,927 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:52,927 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 18 states. [2018-10-04 12:58:53,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:53,335 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2018-10-04 12:58:53,336 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2018-10-04 12:58:53,336 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 18 [2018-10-04 12:58:53,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:53,337 INFO L225 Difference]: With dead ends: 22 [2018-10-04 12:58:53,337 INFO L226 Difference]: Without dead ends: 20 [2018-10-04 12:58:53,338 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 12:58:53,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2018-10-04 12:58:53,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2018-10-04 12:58:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2018-10-04 12:58:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2018-10-04 12:58:53,342 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2018-10-04 12:58:53,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:53,343 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2018-10-04 12:58:53,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has 18 states. [2018-10-04 12:58:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2018-10-04 12:58:53,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-10-04 12:58:53,344 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:53,344 INFO L375 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1] [2018-10-04 12:58:53,344 INFO L423 AbstractCegarLoop]: === Iteration 16 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:53,344 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:53,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1291236293, now seen corresponding path program 15 times [2018-10-04 12:58:53,345 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:53,345 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:53,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:53,346 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:53,346 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:53,354 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:53,355 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:53,355 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:53,371 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:58:53,475 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2018-10-04 12:58:53,475 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:53,479 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:54,825 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:54,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2018-10-04 12:58:54,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2018-10-04 12:58:54,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2018-10-04 12:58:54,826 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:54,826 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 19 states. [2018-10-04 12:58:55,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:55,321 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2018-10-04 12:58:55,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2018-10-04 12:58:55,322 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 19 [2018-10-04 12:58:55,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:55,322 INFO L225 Difference]: With dead ends: 23 [2018-10-04 12:58:55,322 INFO L226 Difference]: Without dead ends: 21 [2018-10-04 12:58:55,323 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 0.9s impTime 18 [2018-10-04 12:58:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2018-10-04 12:58:55,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2018-10-04 12:58:55,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2018-10-04 12:58:55,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2018-10-04 12:58:55,329 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2018-10-04 12:58:55,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:55,330 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2018-10-04 12:58:55,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has 19 states. [2018-10-04 12:58:55,330 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2018-10-04 12:58:55,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2018-10-04 12:58:55,330 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:55,330 INFO L375 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1] [2018-10-04 12:58:55,331 INFO L423 AbstractCegarLoop]: === Iteration 17 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:55,331 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:55,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1373617444, now seen corresponding path program 16 times [2018-10-04 12:58:55,331 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:55,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:55,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:55,332 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:55,332 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:55,340 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:55,341 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:55,341 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 12:58:55,353 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:58:55,434 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:58:55,434 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:55,437 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:55,988 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:55,988 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2018-10-04 12:58:55,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2018-10-04 12:58:55,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2018-10-04 12:58:55,988 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:55,989 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 20 states. [2018-10-04 12:58:56,436 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 17 [2018-10-04 12:58:56,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:56,497 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2018-10-04 12:58:56,498 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2018-10-04 12:58:56,498 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2018-10-04 12:58:56,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:56,498 INFO L225 Difference]: With dead ends: 24 [2018-10-04 12:58:56,498 INFO L226 Difference]: Without dead ends: 22 [2018-10-04 12:58:56,499 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.4s impTime 17 [2018-10-04 12:58:56,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2018-10-04 12:58:56,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2018-10-04 12:58:56,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2018-10-04 12:58:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2018-10-04 12:58:56,503 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2018-10-04 12:58:56,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:56,503 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2018-10-04 12:58:56,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has 20 states. [2018-10-04 12:58:56,503 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2018-10-04 12:58:56,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2018-10-04 12:58:56,504 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:56,504 INFO L375 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1] [2018-10-04 12:58:56,504 INFO L423 AbstractCegarLoop]: === Iteration 18 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:56,504 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:56,505 INFO L82 PathProgramCache]: Analyzing trace with hash -367534171, now seen corresponding path program 17 times [2018-10-04 12:58:56,505 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:56,505 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:56,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:56,506 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:56,506 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:56,514 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:56,514 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:56,514 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:56,529 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:58:56,625 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-10-04 12:58:56,625 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:56,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:56,991 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 18 [2018-10-04 12:58:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:57,013 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:57,013 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2018-10-04 12:58:57,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2018-10-04 12:58:57,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2018-10-04 12:58:57,015 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:57,015 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 21 states. [2018-10-04 12:58:57,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:57,454 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2018-10-04 12:58:57,455 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2018-10-04 12:58:57,455 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 21 [2018-10-04 12:58:57,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:57,456 INFO L225 Difference]: With dead ends: 25 [2018-10-04 12:58:57,456 INFO L226 Difference]: Without dead ends: 23 [2018-10-04 12:58:57,456 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 18 [2018-10-04 12:58:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2018-10-04 12:58:57,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2018-10-04 12:58:57,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2018-10-04 12:58:57,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2018-10-04 12:58:57,462 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2018-10-04 12:58:57,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:57,462 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2018-10-04 12:58:57,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has 21 states. [2018-10-04 12:58:57,462 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2018-10-04 12:58:57,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-10-04 12:58:57,463 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:57,463 INFO L375 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1] [2018-10-04 12:58:57,463 INFO L423 AbstractCegarLoop]: === Iteration 19 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:57,463 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:57,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1491340612, now seen corresponding path program 18 times [2018-10-04 12:58:57,464 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:57,464 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:57,464 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:57,464 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:57,465 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:57,473 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:57,473 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:57,473 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:57,489 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:58:57,601 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2018-10-04 12:58:57,601 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:58:57,603 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:58,012 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:58:58,061 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:58,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:58,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2018-10-04 12:58:58,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2018-10-04 12:58:58,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2018-10-04 12:58:58,082 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:58,082 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 22 states. [2018-10-04 12:58:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:58,603 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2018-10-04 12:58:58,603 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2018-10-04 12:58:58,604 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 22 [2018-10-04 12:58:58,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:58,604 INFO L225 Difference]: With dead ends: 26 [2018-10-04 12:58:58,605 INFO L226 Difference]: Without dead ends: 24 [2018-10-04 12:58:58,605 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time 0.3s impTime 21 [2018-10-04 12:58:58,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2018-10-04 12:58:58,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2018-10-04 12:58:58,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2018-10-04 12:58:58,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2018-10-04 12:58:58,611 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2018-10-04 12:58:58,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:58,612 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2018-10-04 12:58:58,612 INFO L481 AbstractCegarLoop]: Interpolant automaton has 22 states. [2018-10-04 12:58:58,612 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2018-10-04 12:58:58,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2018-10-04 12:58:58,613 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:58,613 INFO L375 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1] [2018-10-04 12:58:58,613 INFO L423 AbstractCegarLoop]: === Iteration 20 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:58,613 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:58,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1013083259, now seen corresponding path program 19 times [2018-10-04 12:58:58,613 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:58,614 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:58,614 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:58,614 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:58:58,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:58,624 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:58,624 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:58,624 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:58,636 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:58:58,778 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:58:59,177 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:58:59,313 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:58:59,333 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:58:59,333 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2018-10-04 12:58:59,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2018-10-04 12:58:59,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2018-10-04 12:58:59,334 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:58:59,335 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 23 states. [2018-10-04 12:58:59,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:58:59,942 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2018-10-04 12:58:59,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2018-10-04 12:58:59,943 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 23 [2018-10-04 12:58:59,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:58:59,944 INFO L225 Difference]: With dead ends: 27 [2018-10-04 12:58:59,944 INFO L226 Difference]: Without dead ends: 25 [2018-10-04 12:58:59,944 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 22 [2018-10-04 12:58:59,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2018-10-04 12:58:59,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2018-10-04 12:58:59,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2018-10-04 12:58:59,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2018-10-04 12:58:59,949 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2018-10-04 12:58:59,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:58:59,949 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2018-10-04 12:58:59,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has 23 states. [2018-10-04 12:58:59,949 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2018-10-04 12:58:59,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2018-10-04 12:58:59,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:58:59,950 INFO L375 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1] [2018-10-04 12:58:59,950 INFO L423 AbstractCegarLoop]: === Iteration 21 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:58:59,951 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:58:59,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1340811932, now seen corresponding path program 20 times [2018-10-04 12:58:59,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:58:59,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:58:59,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:59,952 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:58:59,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:58:59,959 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:58:59,959 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:58:59,959 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:58:59,979 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:00,137 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:00,137 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:00,140 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:00,581 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:00,717 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:00,717 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2018-10-04 12:59:00,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2018-10-04 12:59:00,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2018-10-04 12:59:00,718 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:00,718 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 24 states. [2018-10-04 12:59:01,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:01,178 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2018-10-04 12:59:01,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-10-04 12:59:01,178 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 24 [2018-10-04 12:59:01,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:01,179 INFO L225 Difference]: With dead ends: 28 [2018-10-04 12:59:01,179 INFO L226 Difference]: Without dead ends: 26 [2018-10-04 12:59:01,180 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s Time 0.3s impTime 23 [2018-10-04 12:59:01,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2018-10-04 12:59:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2018-10-04 12:59:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2018-10-04 12:59:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2018-10-04 12:59:01,185 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2018-10-04 12:59:01,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:01,186 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2018-10-04 12:59:01,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has 24 states. [2018-10-04 12:59:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2018-10-04 12:59:01,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-10-04 12:59:01,187 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:01,187 INFO L375 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1] [2018-10-04 12:59:01,187 INFO L423 AbstractCegarLoop]: === Iteration 22 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:01,187 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:01,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1384501093, now seen corresponding path program 21 times [2018-10-04 12:59:01,187 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:01,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:01,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:01,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:01,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:01,194 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:01,195 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:01,195 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:01,206 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:01,384 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2018-10-04 12:59:01,384 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:01,387 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:01,721 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:02,052 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:02,052 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2018-10-04 12:59:02,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-10-04 12:59:02,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-10-04 12:59:02,053 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:02,053 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 25 states. [2018-10-04 12:59:02,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:02,711 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2018-10-04 12:59:02,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2018-10-04 12:59:02,713 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 25 [2018-10-04 12:59:02,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:02,714 INFO L225 Difference]: With dead ends: 29 [2018-10-04 12:59:02,714 INFO L226 Difference]: Without dead ends: 27 [2018-10-04 12:59:02,715 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 12:59:02,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2018-10-04 12:59:02,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2018-10-04 12:59:02,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2018-10-04 12:59:02,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2018-10-04 12:59:02,719 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2018-10-04 12:59:02,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:02,720 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2018-10-04 12:59:02,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-10-04 12:59:02,720 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2018-10-04 12:59:02,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2018-10-04 12:59:02,720 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:02,720 INFO L375 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2018-10-04 12:59:02,721 INFO L423 AbstractCegarLoop]: === Iteration 23 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:02,721 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:02,721 INFO L82 PathProgramCache]: Analyzing trace with hash -30141052, now seen corresponding path program 22 times [2018-10-04 12:59:02,721 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:02,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:02,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:02,722 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:02,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:02,728 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:02,729 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:02,729 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:02,742 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:02,936 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:02,937 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:02,940 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:03,387 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:03,610 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:03,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:03,639 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2018-10-04 12:59:03,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2018-10-04 12:59:03,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2018-10-04 12:59:03,640 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:03,640 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 26 states. [2018-10-04 12:59:04,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:04,212 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2018-10-04 12:59:04,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2018-10-04 12:59:04,212 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 26 [2018-10-04 12:59:04,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:04,213 INFO L225 Difference]: With dead ends: 30 [2018-10-04 12:59:04,213 INFO L226 Difference]: Without dead ends: 28 [2018-10-04 12:59:04,214 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 25 [2018-10-04 12:59:04,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2018-10-04 12:59:04,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2018-10-04 12:59:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2018-10-04 12:59:04,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2018-10-04 12:59:04,218 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2018-10-04 12:59:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:04,218 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2018-10-04 12:59:04,218 INFO L481 AbstractCegarLoop]: Interpolant automaton has 26 states. [2018-10-04 12:59:04,219 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2018-10-04 12:59:04,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2018-10-04 12:59:04,219 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:04,219 INFO L375 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1] [2018-10-04 12:59:04,220 INFO L423 AbstractCegarLoop]: === Iteration 24 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:04,220 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:04,220 INFO L82 PathProgramCache]: Analyzing trace with hash -934374587, now seen corresponding path program 23 times [2018-10-04 12:59:04,220 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:04,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:04,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:04,221 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:04,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:04,227 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:04,227 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:04,228 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 12:59:04,244 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:04,489 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-10-04 12:59:04,489 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:04,492 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:04,829 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:05,036 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:05,056 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:05,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2018-10-04 12:59:05,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2018-10-04 12:59:05,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2018-10-04 12:59:05,057 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:05,057 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 27 states. [2018-10-04 12:59:05,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:05,592 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2018-10-04 12:59:05,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2018-10-04 12:59:05,592 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 27 [2018-10-04 12:59:05,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:05,593 INFO L225 Difference]: With dead ends: 31 [2018-10-04 12:59:05,593 INFO L226 Difference]: Without dead ends: 29 [2018-10-04 12:59:05,594 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 12:59:05,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2018-10-04 12:59:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2018-10-04 12:59:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2018-10-04 12:59:05,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2018-10-04 12:59:05,602 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2018-10-04 12:59:05,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:05,603 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2018-10-04 12:59:05,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has 27 states. [2018-10-04 12:59:05,603 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2018-10-04 12:59:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2018-10-04 12:59:05,603 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:05,604 INFO L375 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1] [2018-10-04 12:59:05,604 INFO L423 AbstractCegarLoop]: === Iteration 25 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:05,604 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:05,604 INFO L82 PathProgramCache]: Analyzing trace with hash 1099156900, now seen corresponding path program 24 times [2018-10-04 12:59:05,604 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:05,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:05,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:05,605 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:05,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:05,611 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:05,612 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:05,612 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:05,625 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:05,896 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2018-10-04 12:59:05,896 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:05,899 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:06,266 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:06,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:06,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2018-10-04 12:59:06,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2018-10-04 12:59:06,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2018-10-04 12:59:06,538 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:06,538 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 28 states. [2018-10-04 12:59:07,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:07,142 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2018-10-04 12:59:07,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2018-10-04 12:59:07,143 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 28 [2018-10-04 12:59:07,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:07,144 INFO L225 Difference]: With dead ends: 32 [2018-10-04 12:59:07,144 INFO L226 Difference]: Without dead ends: 30 [2018-10-04 12:59:07,144 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 12:59:07,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2018-10-04 12:59:07,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2018-10-04 12:59:07,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2018-10-04 12:59:07,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2018-10-04 12:59:07,149 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2018-10-04 12:59:07,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:07,149 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2018-10-04 12:59:07,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has 28 states. [2018-10-04 12:59:07,149 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2018-10-04 12:59:07,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-10-04 12:59:07,150 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:07,150 INFO L375 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1] [2018-10-04 12:59:07,150 INFO L423 AbstractCegarLoop]: === Iteration 26 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:07,150 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:07,151 INFO L82 PathProgramCache]: Analyzing trace with hash -285876443, now seen corresponding path program 25 times [2018-10-04 12:59:07,151 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:07,151 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:07,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:07,152 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:07,152 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:07,158 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:07,158 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:07,158 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:07,173 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:07,511 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:07,830 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:08,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:08,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2018-10-04 12:59:08,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2018-10-04 12:59:08,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2018-10-04 12:59:08,125 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:08,125 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 29 states. [2018-10-04 12:59:08,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:08,928 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2018-10-04 12:59:08,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2018-10-04 12:59:08,928 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 29 [2018-10-04 12:59:08,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:08,929 INFO L225 Difference]: With dead ends: 33 [2018-10-04 12:59:08,929 INFO L226 Difference]: Without dead ends: 31 [2018-10-04 12:59:08,929 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s Time 0.5s impTime 28 [2018-10-04 12:59:08,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2018-10-04 12:59:08,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2018-10-04 12:59:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2018-10-04 12:59:08,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2018-10-04 12:59:08,936 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2018-10-04 12:59:08,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:08,937 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2018-10-04 12:59:08,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 29 states. [2018-10-04 12:59:08,937 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2018-10-04 12:59:08,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2018-10-04 12:59:08,937 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:08,937 INFO L375 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1] [2018-10-04 12:59:08,937 INFO L423 AbstractCegarLoop]: === Iteration 27 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:08,938 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:08,938 INFO L82 PathProgramCache]: Analyzing trace with hash -272237116, now seen corresponding path program 26 times [2018-10-04 12:59:08,938 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:08,938 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:08,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:08,940 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:08,940 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:08,949 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:08,949 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:08,949 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:08,960 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:09,345 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:09,346 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:09,349 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:10,665 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:10,994 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:10,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2018-10-04 12:59:10,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2018-10-04 12:59:10,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2018-10-04 12:59:10,994 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:10,995 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 30 states. [2018-10-04 12:59:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:11,651 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2018-10-04 12:59:11,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2018-10-04 12:59:11,652 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 30 [2018-10-04 12:59:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:11,653 INFO L225 Difference]: With dead ends: 34 [2018-10-04 12:59:11,653 INFO L226 Difference]: Without dead ends: 32 [2018-10-04 12:59:11,653 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 29 [2018-10-04 12:59:11,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2018-10-04 12:59:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2018-10-04 12:59:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2018-10-04 12:59:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2018-10-04 12:59:11,659 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2018-10-04 12:59:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:11,660 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2018-10-04 12:59:11,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has 30 states. [2018-10-04 12:59:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2018-10-04 12:59:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2018-10-04 12:59:11,660 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:11,661 INFO L375 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1] [2018-10-04 12:59:11,661 INFO L423 AbstractCegarLoop]: === Iteration 28 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:11,661 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:11,661 INFO L82 PathProgramCache]: Analyzing trace with hash 150582021, now seen corresponding path program 27 times [2018-10-04 12:59:11,661 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:11,661 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:11,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:11,663 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:11,663 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:11,669 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:11,670 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:11,670 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:11,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:12,151 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2018-10-04 12:59:12,152 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:12,155 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:12,463 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:12,830 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:12,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2018-10-04 12:59:12,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-10-04 12:59:12,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-10-04 12:59:12,831 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:12,831 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 31 states. [2018-10-04 12:59:13,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:13,606 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2018-10-04 12:59:13,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2018-10-04 12:59:13,607 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 31 [2018-10-04 12:59:13,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:13,607 INFO L225 Difference]: With dead ends: 35 [2018-10-04 12:59:13,607 INFO L226 Difference]: Without dead ends: 33 [2018-10-04 12:59:13,608 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 12:59:13,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2018-10-04 12:59:13,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2018-10-04 12:59:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2018-10-04 12:59:13,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2018-10-04 12:59:13,613 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2018-10-04 12:59:13,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:13,613 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2018-10-04 12:59:13,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-10-04 12:59:13,613 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2018-10-04 12:59:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2018-10-04 12:59:13,614 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:13,614 INFO L375 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1] [2018-10-04 12:59:13,614 INFO L423 AbstractCegarLoop]: === Iteration 29 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:13,614 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:13,615 INFO L82 PathProgramCache]: Analyzing trace with hash 373073380, now seen corresponding path program 28 times [2018-10-04 12:59:13,615 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:13,615 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:13,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:13,616 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:13,616 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:13,622 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:13,622 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:13,622 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:13,631 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:14,147 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:14,147 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:14,152 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:14,489 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:14,888 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:14,909 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:14,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2018-10-04 12:59:14,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2018-10-04 12:59:14,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2018-10-04 12:59:14,910 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:14,910 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 32 states. [2018-10-04 12:59:15,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:15,661 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2018-10-04 12:59:15,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2018-10-04 12:59:15,661 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 32 [2018-10-04 12:59:15,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:15,662 INFO L225 Difference]: With dead ends: 36 [2018-10-04 12:59:15,662 INFO L226 Difference]: Without dead ends: 34 [2018-10-04 12:59:15,663 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s Time 0.6s impTime 31 [2018-10-04 12:59:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2018-10-04 12:59:15,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2018-10-04 12:59:15,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2018-10-04 12:59:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2018-10-04 12:59:15,668 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2018-10-04 12:59:15,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:15,669 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2018-10-04 12:59:15,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has 32 states. [2018-10-04 12:59:15,669 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2018-10-04 12:59:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2018-10-04 12:59:15,669 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:15,670 INFO L375 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1] [2018-10-04 12:59:15,670 INFO L423 AbstractCegarLoop]: === Iteration 30 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:15,670 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:15,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1319629083, now seen corresponding path program 29 times [2018-10-04 12:59:15,670 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:15,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:15,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:15,671 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:15,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:15,678 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:15,679 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:15,679 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:15,695 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:16,199 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2018-10-04 12:59:16,200 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:16,205 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:16,561 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:17,028 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:17,029 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2018-10-04 12:59:17,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2018-10-04 12:59:17,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2018-10-04 12:59:17,029 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:17,029 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 33 states. [2018-10-04 12:59:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:17,834 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2018-10-04 12:59:17,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-10-04 12:59:17,835 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 33 [2018-10-04 12:59:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:17,836 INFO L225 Difference]: With dead ends: 37 [2018-10-04 12:59:17,836 INFO L226 Difference]: Without dead ends: 35 [2018-10-04 12:59:17,836 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.6s impTime 32 [2018-10-04 12:59:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2018-10-04 12:59:17,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2018-10-04 12:59:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2018-10-04 12:59:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2018-10-04 12:59:17,841 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2018-10-04 12:59:17,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:17,841 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2018-10-04 12:59:17,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has 33 states. [2018-10-04 12:59:17,841 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2018-10-04 12:59:17,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2018-10-04 12:59:17,841 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:17,842 INFO L375 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1] [2018-10-04 12:59:17,842 INFO L423 AbstractCegarLoop]: === Iteration 31 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:17,842 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:17,842 INFO L82 PathProgramCache]: Analyzing trace with hash 2041169412, now seen corresponding path program 30 times [2018-10-04 12:59:17,842 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:17,842 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:17,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:17,843 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:17,843 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:17,849 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:17,849 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:17,850 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:17,873 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:18,686 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2018-10-04 12:59:18,686 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:18,689 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:19,075 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:19,577 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:19,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:19,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2018-10-04 12:59:19,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2018-10-04 12:59:19,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2018-10-04 12:59:19,597 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:19,598 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 34 states. [2018-10-04 12:59:20,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:20,481 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2018-10-04 12:59:20,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2018-10-04 12:59:20,482 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 34 [2018-10-04 12:59:20,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:20,483 INFO L225 Difference]: With dead ends: 38 [2018-10-04 12:59:20,483 INFO L226 Difference]: Without dead ends: 36 [2018-10-04 12:59:20,483 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s Time 0.7s impTime 33 [2018-10-04 12:59:20,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2018-10-04 12:59:20,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2018-10-04 12:59:20,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2018-10-04 12:59:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2018-10-04 12:59:20,489 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2018-10-04 12:59:20,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:20,489 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2018-10-04 12:59:20,490 INFO L481 AbstractCegarLoop]: Interpolant automaton has 34 states. [2018-10-04 12:59:20,490 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2018-10-04 12:59:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2018-10-04 12:59:20,490 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:20,490 INFO L375 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1] [2018-10-04 12:59:20,490 INFO L423 AbstractCegarLoop]: === Iteration 32 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:20,491 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:20,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1148259643, now seen corresponding path program 31 times [2018-10-04 12:59:20,491 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:20,491 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:20,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:20,492 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:20,492 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:20,498 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:20,499 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:20,499 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:20,512 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:21,135 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:21,452 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:21,970 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:21,991 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:21,991 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2018-10-04 12:59:21,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2018-10-04 12:59:21,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2018-10-04 12:59:21,991 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:21,992 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 35 states. [2018-10-04 12:59:22,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:22,867 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2018-10-04 12:59:22,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-10-04 12:59:22,867 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 35 [2018-10-04 12:59:22,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:22,868 INFO L225 Difference]: With dead ends: 39 [2018-10-04 12:59:22,868 INFO L226 Difference]: Without dead ends: 37 [2018-10-04 12:59:22,869 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s Time 0.7s impTime 34 [2018-10-04 12:59:22,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2018-10-04 12:59:22,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2018-10-04 12:59:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2018-10-04 12:59:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2018-10-04 12:59:22,873 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2018-10-04 12:59:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:22,874 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2018-10-04 12:59:22,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has 35 states. [2018-10-04 12:59:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2018-10-04 12:59:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2018-10-04 12:59:22,874 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:22,874 INFO L375 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1] [2018-10-04 12:59:22,875 INFO L423 AbstractCegarLoop]: === Iteration 33 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:22,875 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:22,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1236312540, now seen corresponding path program 32 times [2018-10-04 12:59:22,875 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:22,875 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:22,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:22,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:22,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:22,881 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:22,882 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:22,882 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:22,896 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:23,584 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:23,585 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:23,591 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:24,042 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:24,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:24,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2018-10-04 12:59:24,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2018-10-04 12:59:24,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2018-10-04 12:59:24,643 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:24,643 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 36 states. [2018-10-04 12:59:25,667 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 33 [2018-10-04 12:59:25,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:25,695 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2018-10-04 12:59:25,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-10-04 12:59:25,696 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 36 [2018-10-04 12:59:25,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:25,697 INFO L225 Difference]: With dead ends: 40 [2018-10-04 12:59:25,697 INFO L226 Difference]: Without dead ends: 38 [2018-10-04 12:59:25,697 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.9s impTime 33 [2018-10-04 12:59:25,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2018-10-04 12:59:25,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2018-10-04 12:59:25,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2018-10-04 12:59:25,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2018-10-04 12:59:25,702 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2018-10-04 12:59:25,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:25,703 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2018-10-04 12:59:25,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has 36 states. [2018-10-04 12:59:25,703 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2018-10-04 12:59:25,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2018-10-04 12:59:25,704 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:25,704 INFO L375 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1] [2018-10-04 12:59:25,704 INFO L423 AbstractCegarLoop]: === Iteration 34 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:25,704 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:25,704 INFO L82 PathProgramCache]: Analyzing trace with hash 329014949, now seen corresponding path program 33 times [2018-10-04 12:59:25,704 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:25,705 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:25,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:25,705 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:25,705 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:25,712 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:25,712 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:25,713 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:25,738 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:26,449 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2018-10-04 12:59:26,449 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:26,453 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:26,795 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:27,442 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 34 [2018-10-04 12:59:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:27,466 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:27,466 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2018-10-04 12:59:27,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2018-10-04 12:59:27,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2018-10-04 12:59:27,467 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:27,467 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 37 states. [2018-10-04 12:59:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:28,469 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2018-10-04 12:59:28,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2018-10-04 12:59:28,470 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 37 [2018-10-04 12:59:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:28,470 INFO L225 Difference]: With dead ends: 41 [2018-10-04 12:59:28,471 INFO L226 Difference]: Without dead ends: 39 [2018-10-04 12:59:28,471 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.8s impTime 34 [2018-10-04 12:59:28,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2018-10-04 12:59:28,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2018-10-04 12:59:28,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2018-10-04 12:59:28,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2018-10-04 12:59:28,476 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2018-10-04 12:59:28,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:28,476 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2018-10-04 12:59:28,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has 37 states. [2018-10-04 12:59:28,476 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2018-10-04 12:59:28,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2018-10-04 12:59:28,477 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:28,477 INFO L375 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1] [2018-10-04 12:59:28,477 INFO L423 AbstractCegarLoop]: === Iteration 35 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:28,477 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:28,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1609526852, now seen corresponding path program 34 times [2018-10-04 12:59:28,478 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:28,478 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:28,478 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:28,478 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:28,479 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:28,484 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:28,485 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:28,485 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:28,496 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:29,264 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:29,264 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:29,269 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:29,574 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:30,329 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:59:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:30,408 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:30,408 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2018-10-04 12:59:30,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2018-10-04 12:59:30,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2018-10-04 12:59:30,409 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:30,409 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 38 states. [2018-10-04 12:59:31,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:31,465 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2018-10-04 12:59:31,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2018-10-04 12:59:31,465 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 38 [2018-10-04 12:59:31,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:31,466 INFO L225 Difference]: With dead ends: 42 [2018-10-04 12:59:31,466 INFO L226 Difference]: Without dead ends: 40 [2018-10-04 12:59:31,467 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s Time 0.8s impTime 37 [2018-10-04 12:59:31,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2018-10-04 12:59:31,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2018-10-04 12:59:31,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2018-10-04 12:59:31,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2018-10-04 12:59:31,472 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2018-10-04 12:59:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:31,473 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2018-10-04 12:59:31,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has 38 states. [2018-10-04 12:59:31,473 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2018-10-04 12:59:31,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2018-10-04 12:59:31,473 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:31,473 INFO L375 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1] [2018-10-04 12:59:31,474 INFO L423 AbstractCegarLoop]: === Iteration 36 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:31,474 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:31,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1644277115, now seen corresponding path program 35 times [2018-10-04 12:59:31,474 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:31,474 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:31,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:31,475 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:31,475 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:31,481 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:31,481 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:31,481 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:31,494 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:32,442 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2018-10-04 12:59:32,442 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:32,448 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:32,766 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:33,397 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:59:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:33,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:33,531 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2018-10-04 12:59:33,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2018-10-04 12:59:33,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2018-10-04 12:59:33,532 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:33,532 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 39 states. [2018-10-04 12:59:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:34,737 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2018-10-04 12:59:34,738 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2018-10-04 12:59:34,738 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 39 [2018-10-04 12:59:34,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:34,739 INFO L225 Difference]: With dead ends: 43 [2018-10-04 12:59:34,739 INFO L226 Difference]: Without dead ends: 41 [2018-10-04 12:59:34,739 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s Time 0.9s impTime 38 [2018-10-04 12:59:34,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2018-10-04 12:59:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2018-10-04 12:59:34,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2018-10-04 12:59:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2018-10-04 12:59:34,744 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2018-10-04 12:59:34,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:34,744 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2018-10-04 12:59:34,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has 39 states. [2018-10-04 12:59:34,745 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2018-10-04 12:59:34,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2018-10-04 12:59:34,745 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:34,745 INFO L375 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1] [2018-10-04 12:59:34,745 INFO L423 AbstractCegarLoop]: === Iteration 37 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:34,746 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:34,746 INFO L82 PathProgramCache]: Analyzing trace with hash 567015012, now seen corresponding path program 36 times [2018-10-04 12:59:34,746 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:34,746 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:34,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:34,747 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:34,747 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:34,752 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:34,753 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:34,753 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:34,767 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 12:59:35,510 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2018-10-04 12:59:35,510 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:35,514 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:35,844 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:36,621 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:59:36,790 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:36,811 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:36,811 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2018-10-04 12:59:36,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2018-10-04 12:59:36,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2018-10-04 12:59:36,812 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:36,812 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 40 states. [2018-10-04 12:59:37,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:37,948 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2018-10-04 12:59:37,948 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2018-10-04 12:59:37,949 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 40 [2018-10-04 12:59:37,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:37,949 INFO L225 Difference]: With dead ends: 44 [2018-10-04 12:59:37,949 INFO L226 Difference]: Without dead ends: 42 [2018-10-04 12:59:37,950 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s Time 1.0s impTime 39 [2018-10-04 12:59:37,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2018-10-04 12:59:37,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2018-10-04 12:59:37,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2018-10-04 12:59:37,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2018-10-04 12:59:37,953 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2018-10-04 12:59:37,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:37,954 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2018-10-04 12:59:37,954 INFO L481 AbstractCegarLoop]: Interpolant automaton has 40 states. [2018-10-04 12:59:37,954 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2018-10-04 12:59:37,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2018-10-04 12:59:37,954 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:37,954 INFO L375 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1] [2018-10-04 12:59:37,955 INFO L423 AbstractCegarLoop]: === Iteration 38 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:37,955 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:37,955 INFO L82 PathProgramCache]: Analyzing trace with hash 397594213, now seen corresponding path program 37 times [2018-10-04 12:59:37,955 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:37,955 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:37,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:37,956 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:37,956 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:37,961 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:37,961 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:37,962 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:37,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:39,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:59:39,309 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:40,304 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:40,942 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:59:41,162 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:41,181 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:41,181 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2018-10-04 12:59:41,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2018-10-04 12:59:41,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2018-10-04 12:59:41,182 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:41,182 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 41 states. [2018-10-04 12:59:42,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:42,390 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2018-10-04 12:59:42,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2018-10-04 12:59:42,390 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 41 [2018-10-04 12:59:42,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:42,391 INFO L225 Difference]: With dead ends: 45 [2018-10-04 12:59:42,391 INFO L226 Difference]: Without dead ends: 43 [2018-10-04 12:59:42,391 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.5s impTime 40 [2018-10-04 12:59:42,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2018-10-04 12:59:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2018-10-04 12:59:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2018-10-04 12:59:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2018-10-04 12:59:42,397 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2018-10-04 12:59:42,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:42,398 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2018-10-04 12:59:42,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has 41 states. [2018-10-04 12:59:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2018-10-04 12:59:42,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2018-10-04 12:59:42,398 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:42,398 INFO L375 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1] [2018-10-04 12:59:42,399 INFO L423 AbstractCegarLoop]: === Iteration 39 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:42,399 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:42,399 INFO L82 PathProgramCache]: Analyzing trace with hash -559483260, now seen corresponding path program 38 times [2018-10-04 12:59:42,399 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:42,399 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:42,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:42,400 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:59:42,400 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:42,406 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:42,406 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:42,406 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:42,420 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 12:59:43,404 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 12:59:43,405 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:43,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:43,742 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:44,508 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:59:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:44,804 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:44,804 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2018-10-04 12:59:44,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2018-10-04 12:59:44,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2018-10-04 12:59:44,804 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:44,804 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 42 states. [2018-10-04 12:59:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:46,090 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2018-10-04 12:59:46,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2018-10-04 12:59:46,091 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 42 [2018-10-04 12:59:46,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:46,091 INFO L225 Difference]: With dead ends: 46 [2018-10-04 12:59:46,091 INFO L226 Difference]: Without dead ends: 44 [2018-10-04 12:59:46,092 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.2s impTime 41 [2018-10-04 12:59:46,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2018-10-04 12:59:46,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2018-10-04 12:59:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2018-10-04 12:59:46,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2018-10-04 12:59:46,096 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2018-10-04 12:59:46,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:46,096 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2018-10-04 12:59:46,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has 42 states. [2018-10-04 12:59:46,097 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2018-10-04 12:59:46,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2018-10-04 12:59:46,097 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:46,097 INFO L375 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1] [2018-10-04 12:59:46,097 INFO L423 AbstractCegarLoop]: === Iteration 40 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:46,097 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:46,097 INFO L82 PathProgramCache]: Analyzing trace with hash -164113851, now seen corresponding path program 39 times [2018-10-04 12:59:46,097 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:46,098 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:46,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:46,098 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:46,098 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:46,104 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:46,104 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:46,104 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:46,117 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 12:59:47,331 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2018-10-04 12:59:47,332 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:47,336 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:47,666 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:48,312 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:59:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:48,692 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:48,692 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2018-10-04 12:59:48,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-10-04 12:59:48,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-10-04 12:59:48,693 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:48,693 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 43 states. [2018-10-04 12:59:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:50,172 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2018-10-04 12:59:50,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-10-04 12:59:50,172 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 43 [2018-10-04 12:59:50,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:50,173 INFO L225 Difference]: With dead ends: 47 [2018-10-04 12:59:50,173 INFO L226 Difference]: Without dead ends: 45 [2018-10-04 12:59:50,173 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.1s impTime 42 [2018-10-04 12:59:50,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2018-10-04 12:59:50,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2018-10-04 12:59:50,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2018-10-04 12:59:50,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2018-10-04 12:59:50,178 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2018-10-04 12:59:50,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:50,178 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2018-10-04 12:59:50,178 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-10-04 12:59:50,178 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2018-10-04 12:59:50,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2018-10-04 12:59:50,178 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:50,179 INFO L375 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1] [2018-10-04 12:59:50,179 INFO L423 AbstractCegarLoop]: === Iteration 41 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:50,179 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:50,179 INFO L82 PathProgramCache]: Analyzing trace with hash -792564060, now seen corresponding path program 40 times [2018-10-04 12:59:50,179 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:50,179 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:50,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:50,180 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:50,180 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:50,184 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:50,185 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:50,185 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:50,195 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 12:59:51,700 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 12:59:51,700 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:51,708 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:52,039 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:52,672 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:59:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:53,077 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:53,077 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2018-10-04 12:59:53,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2018-10-04 12:59:53,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2018-10-04 12:59:53,078 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:53,078 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 44 states. [2018-10-04 12:59:54,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:54,539 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2018-10-04 12:59:54,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2018-10-04 12:59:54,540 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 44 [2018-10-04 12:59:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:54,540 INFO L225 Difference]: With dead ends: 48 [2018-10-04 12:59:54,540 INFO L226 Difference]: Without dead ends: 46 [2018-10-04 12:59:54,540 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s Time 1.1s impTime 43 [2018-10-04 12:59:54,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2018-10-04 12:59:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2018-10-04 12:59:54,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2018-10-04 12:59:54,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2018-10-04 12:59:54,544 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2018-10-04 12:59:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:54,544 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2018-10-04 12:59:54,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has 44 states. [2018-10-04 12:59:54,544 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2018-10-04 12:59:54,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-10-04 12:59:54,544 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:54,544 INFO L375 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1] [2018-10-04 12:59:54,544 INFO L423 AbstractCegarLoop]: === Iteration 42 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:54,545 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:54,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1200315941, now seen corresponding path program 41 times [2018-10-04 12:59:54,545 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:54,545 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:54,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:54,545 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:54,545 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:54,551 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:54,551 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:54,552 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 12:59:54,559 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 12:59:56,068 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2018-10-04 12:59:56,069 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 12:59:56,079 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:59:56,409 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 12:59:57,113 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 12:59:57,713 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:59:57,732 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 12:59:57,732 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2018-10-04 12:59:57,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2018-10-04 12:59:57,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2018-10-04 12:59:57,733 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:59:57,733 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 45 states. [2018-10-04 12:59:59,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:59:59,192 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2018-10-04 12:59:59,193 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-10-04 12:59:59,193 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 45 [2018-10-04 12:59:59,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:59:59,194 INFO L225 Difference]: With dead ends: 49 [2018-10-04 12:59:59,194 INFO L226 Difference]: Without dead ends: 47 [2018-10-04 12:59:59,194 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.3s impTime 44 [2018-10-04 12:59:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2018-10-04 12:59:59,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2018-10-04 12:59:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2018-10-04 12:59:59,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2018-10-04 12:59:59,198 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2018-10-04 12:59:59,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:59:59,199 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2018-10-04 12:59:59,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 45 states. [2018-10-04 12:59:59,199 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2018-10-04 12:59:59,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2018-10-04 12:59:59,199 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:59:59,200 INFO L375 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1] [2018-10-04 12:59:59,200 INFO L423 AbstractCegarLoop]: === Iteration 43 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 12:59:59,200 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:59:59,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1444913468, now seen corresponding path program 42 times [2018-10-04 12:59:59,200 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:59:59,200 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:59:59,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:59,201 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 12:59:59,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:59:59,207 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 12:59:59,207 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 12:59:59,207 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 12:59:59,216 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:00:01,006 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2018-10-04 13:00:01,006 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:01,012 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:01,326 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:02,014 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:02,518 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 13:00:02,537 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:00:02,538 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2018-10-04 13:00:02,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2018-10-04 13:00:02,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2018-10-04 13:00:02,538 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:02,539 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 46 states. [2018-10-04 13:00:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:04,045 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2018-10-04 13:00:04,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2018-10-04 13:00:04,045 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 46 [2018-10-04 13:00:04,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:04,046 INFO L225 Difference]: With dead ends: 50 [2018-10-04 13:00:04,046 INFO L226 Difference]: Without dead ends: 48 [2018-10-04 13:00:04,046 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.3s impTime 45 [2018-10-04 13:00:04,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2018-10-04 13:00:04,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2018-10-04 13:00:04,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2018-10-04 13:00:04,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2018-10-04 13:00:04,052 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2018-10-04 13:00:04,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:04,053 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2018-10-04 13:00:04,053 INFO L481 AbstractCegarLoop]: Interpolant automaton has 46 states. [2018-10-04 13:00:04,053 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2018-10-04 13:00:04,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2018-10-04 13:00:04,053 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:04,054 INFO L375 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1] [2018-10-04 13:00:04,054 INFO L423 AbstractCegarLoop]: === Iteration 44 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:00:04,054 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:04,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1842646523, now seen corresponding path program 43 times [2018-10-04 13:00:04,054 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:04,054 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:04,055 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:04,056 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:04,056 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:04,064 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:00:04,064 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:00:04,064 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 13:00:04,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:05,671 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:06,004 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:06,637 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:07,203 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 13:00:07,223 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:00:07,223 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2018-10-04 13:00:07,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2018-10-04 13:00:07,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2018-10-04 13:00:07,223 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:07,224 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 47 states. [2018-10-04 13:00:08,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:08,824 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2018-10-04 13:00:08,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2018-10-04 13:00:08,825 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 47 [2018-10-04 13:00:08,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:08,826 INFO L225 Difference]: With dead ends: 51 [2018-10-04 13:00:08,826 INFO L226 Difference]: Without dead ends: 49 [2018-10-04 13:00:08,826 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s Time 1.3s impTime 46 [2018-10-04 13:00:08,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2018-10-04 13:00:08,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2018-10-04 13:00:08,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2018-10-04 13:00:08,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2018-10-04 13:00:08,831 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2018-10-04 13:00:08,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:08,832 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2018-10-04 13:00:08,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has 47 states. [2018-10-04 13:00:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2018-10-04 13:00:08,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2018-10-04 13:00:08,832 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:08,832 INFO L375 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1] [2018-10-04 13:00:08,833 INFO L423 AbstractCegarLoop]: === Iteration 45 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:00:08,833 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:08,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1287469340, now seen corresponding path program 44 times [2018-10-04 13:00:08,833 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:08,833 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:08,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:08,834 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:08,834 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:08,839 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:00:08,840 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:00:08,840 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 13:00:08,854 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:00:10,549 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:00:10,549 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:10,558 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:10,869 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:11,526 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:12,177 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 13:00:12,198 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:00:12,198 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2018-10-04 13:00:12,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2018-10-04 13:00:12,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2018-10-04 13:00:12,199 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:12,199 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 48 states. [2018-10-04 13:00:13,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:13,848 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2018-10-04 13:00:13,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2018-10-04 13:00:13,849 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 48 [2018-10-04 13:00:13,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:13,849 INFO L225 Difference]: With dead ends: 52 [2018-10-04 13:00:13,850 INFO L226 Difference]: Without dead ends: 50 [2018-10-04 13:00:13,850 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s Time 1.4s impTime 47 [2018-10-04 13:00:13,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2018-10-04 13:00:13,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2018-10-04 13:00:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2018-10-04 13:00:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2018-10-04 13:00:13,854 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2018-10-04 13:00:13,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:13,854 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2018-10-04 13:00:13,855 INFO L481 AbstractCegarLoop]: Interpolant automaton has 48 states. [2018-10-04 13:00:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2018-10-04 13:00:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2018-10-04 13:00:13,855 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:13,855 INFO L375 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1] [2018-10-04 13:00:13,855 INFO L423 AbstractCegarLoop]: === Iteration 46 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:00:13,856 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:13,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1256845851, now seen corresponding path program 45 times [2018-10-04 13:00:13,856 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:13,856 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:13,856 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:13,857 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:13,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:13,863 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:00:13,863 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:00:13,863 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:00:13,878 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:00:15,999 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2018-10-04 13:00:15,999 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:16,004 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:16,358 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:16,987 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:17,694 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 13:00:17,714 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:00:17,714 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2018-10-04 13:00:17,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2018-10-04 13:00:17,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2018-10-04 13:00:17,715 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:17,715 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 49 states. [2018-10-04 13:00:19,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:19,451 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2018-10-04 13:00:19,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2018-10-04 13:00:19,452 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 49 [2018-10-04 13:00:19,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:19,453 INFO L225 Difference]: With dead ends: 53 [2018-10-04 13:00:19,453 INFO L226 Difference]: Without dead ends: 51 [2018-10-04 13:00:19,453 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.4s impTime 48 [2018-10-04 13:00:19,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2018-10-04 13:00:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2018-10-04 13:00:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2018-10-04 13:00:19,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2018-10-04 13:00:19,457 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2018-10-04 13:00:19,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:19,458 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2018-10-04 13:00:19,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 49 states. [2018-10-04 13:00:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2018-10-04 13:00:19,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2018-10-04 13:00:19,458 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:19,458 INFO L375 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2018-10-04 13:00:19,459 INFO L423 AbstractCegarLoop]: === Iteration 47 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:00:19,459 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:19,459 INFO L82 PathProgramCache]: Analyzing trace with hash -307517692, now seen corresponding path program 46 times [2018-10-04 13:00:19,459 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:19,459 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:19,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:19,460 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:19,460 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:19,466 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:00:19,466 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:00:19,466 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 13:00:19,480 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:00:21,822 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:00:21,822 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:21,832 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:22,174 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:22,813 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:23,571 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 13:00:23,591 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:00:23,592 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2018-10-04 13:00:23,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2018-10-04 13:00:23,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2018-10-04 13:00:23,592 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:23,592 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 50 states. [2018-10-04 13:00:25,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:25,433 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2018-10-04 13:00:25,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2018-10-04 13:00:25,433 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 50 [2018-10-04 13:00:25,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:25,434 INFO L225 Difference]: With dead ends: 54 [2018-10-04 13:00:25,435 INFO L226 Difference]: Without dead ends: 52 [2018-10-04 13:00:25,435 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s Time 1.5s impTime 49 [2018-10-04 13:00:25,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2018-10-04 13:00:25,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2018-10-04 13:00:25,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2018-10-04 13:00:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2018-10-04 13:00:25,440 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2018-10-04 13:00:25,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:25,440 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2018-10-04 13:00:25,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has 50 states. [2018-10-04 13:00:25,440 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2018-10-04 13:00:25,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2018-10-04 13:00:25,441 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:25,441 INFO L375 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1] [2018-10-04 13:00:25,441 INFO L423 AbstractCegarLoop]: === Iteration 48 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:00:25,441 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:25,441 INFO L82 PathProgramCache]: Analyzing trace with hash -943115835, now seen corresponding path program 47 times [2018-10-04 13:00:25,441 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:25,441 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:25,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:25,442 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:25,442 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:25,448 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:00:25,448 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:00:25,448 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:00:25,457 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:00:28,083 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2018-10-04 13:00:28,084 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:28,095 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:28,418 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:29,052 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:29,893 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 13:00:29,913 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:00:29,913 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2018-10-04 13:00:29,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-10-04 13:00:29,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-10-04 13:00:29,913 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:29,914 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 51 states. [2018-10-04 13:00:31,783 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 48 [2018-10-04 13:00:31,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:31,820 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2018-10-04 13:00:31,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2018-10-04 13:00:31,820 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 51 [2018-10-04 13:00:31,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:31,821 INFO L225 Difference]: With dead ends: 55 [2018-10-04 13:00:31,821 INFO L226 Difference]: Without dead ends: 53 [2018-10-04 13:00:31,821 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s Time 1.6s impTime 48 [2018-10-04 13:00:31,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2018-10-04 13:00:31,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2018-10-04 13:00:31,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2018-10-04 13:00:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2018-10-04 13:00:31,827 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2018-10-04 13:00:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:31,827 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2018-10-04 13:00:31,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-10-04 13:00:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2018-10-04 13:00:31,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2018-10-04 13:00:31,828 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:31,828 INFO L375 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1] [2018-10-04 13:00:31,828 INFO L423 AbstractCegarLoop]: === Iteration 49 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:00:31,828 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:31,828 INFO L82 PathProgramCache]: Analyzing trace with hash 828178212, now seen corresponding path program 48 times [2018-10-04 13:00:31,828 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:31,828 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:31,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:31,829 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:31,829 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:31,836 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:00:31,836 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:00:31,836 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 13:00:31,850 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:00:34,592 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2018-10-04 13:00:34,592 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:34,598 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:34,902 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:35,580 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:36,591 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 49 [2018-10-04 13:00:36,602 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 13:00:36,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:00:36,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2018-10-04 13:00:36,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2018-10-04 13:00:36,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2018-10-04 13:00:36,636 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:36,636 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 52 states. [2018-10-04 13:00:38,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:38,672 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2018-10-04 13:00:38,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2018-10-04 13:00:38,672 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 52 [2018-10-04 13:00:38,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:38,673 INFO L225 Difference]: With dead ends: 56 [2018-10-04 13:00:38,673 INFO L226 Difference]: Without dead ends: 54 [2018-10-04 13:00:38,674 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.6s impTime 49 [2018-10-04 13:00:38,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2018-10-04 13:00:38,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2018-10-04 13:00:38,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2018-10-04 13:00:38,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2018-10-04 13:00:38,678 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2018-10-04 13:00:38,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:38,678 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2018-10-04 13:00:38,678 INFO L481 AbstractCegarLoop]: Interpolant automaton has 52 states. [2018-10-04 13:00:38,679 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2018-10-04 13:00:38,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2018-10-04 13:00:38,679 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:38,679 INFO L375 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1] [2018-10-04 13:00:38,679 INFO L423 AbstractCegarLoop]: === Iteration 50 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:00:38,679 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:38,679 INFO L82 PathProgramCache]: Analyzing trace with hash -96281179, now seen corresponding path program 49 times [2018-10-04 13:00:38,679 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:38,679 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:38,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:38,680 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:38,680 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:38,686 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:00:38,686 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:00:38,686 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 13:00:38,694 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:41,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:00:41,286 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:41,589 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:42,220 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:43,307 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:00:43,390 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 13:00:43,410 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:00:43,410 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2018-10-04 13:00:43,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2018-10-04 13:00:43,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2018-10-04 13:00:43,411 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:43,411 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand 53 states. [2018-10-04 13:00:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:45,439 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2018-10-04 13:00:45,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2018-10-04 13:00:45,440 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 53 [2018-10-04 13:00:45,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:45,441 INFO L225 Difference]: With dead ends: 57 [2018-10-04 13:00:45,441 INFO L226 Difference]: Without dead ends: 55 [2018-10-04 13:00:45,441 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.8s impTime 52 [2018-10-04 13:00:45,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2018-10-04 13:00:45,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2018-10-04 13:00:45,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2018-10-04 13:00:45,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2018-10-04 13:00:45,446 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2018-10-04 13:00:45,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:45,446 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2018-10-04 13:00:45,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has 53 states. [2018-10-04 13:00:45,446 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2018-10-04 13:00:45,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2018-10-04 13:00:45,447 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:45,447 INFO L375 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1] [2018-10-04 13:00:45,447 INFO L423 AbstractCegarLoop]: === Iteration 51 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:00:45,447 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:45,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1310248772, now seen corresponding path program 50 times [2018-10-04 13:00:45,447 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:45,447 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:45,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:45,448 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:00:45,448 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:45,455 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:00:45,455 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:00:45,455 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 13:00:45,465 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:00:48,285 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:00:48,285 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:48,295 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:48,636 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:49,282 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:50,199 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:00:50,363 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 13:00:50,384 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:00:50,384 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2018-10-04 13:00:50,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2018-10-04 13:00:50,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2018-10-04 13:00:50,384 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:50,385 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 54 states. [2018-10-04 13:00:52,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:00:52,485 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2018-10-04 13:00:52,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2018-10-04 13:00:52,485 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 54 [2018-10-04 13:00:52,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:00:52,486 INFO L225 Difference]: With dead ends: 58 [2018-10-04 13:00:52,487 INFO L226 Difference]: Without dead ends: 56 [2018-10-04 13:00:52,487 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s Time 1.8s impTime 53 [2018-10-04 13:00:52,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2018-10-04 13:00:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2018-10-04 13:00:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2018-10-04 13:00:52,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2018-10-04 13:00:52,491 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2018-10-04 13:00:52,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:00:52,491 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2018-10-04 13:00:52,491 INFO L481 AbstractCegarLoop]: Interpolant automaton has 54 states. [2018-10-04 13:00:52,491 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2018-10-04 13:00:52,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2018-10-04 13:00:52,492 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:00:52,492 INFO L375 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1] [2018-10-04 13:00:52,492 INFO L423 AbstractCegarLoop]: === Iteration 52 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:00:52,492 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:00:52,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1963004293, now seen corresponding path program 51 times [2018-10-04 13:00:52,492 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:00:52,493 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:00:52,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:52,493 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:00:52,493 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:00:52,499 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:00:52,499 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:00:52,499 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 13:00:52,510 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:00:55,759 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2018-10-04 13:00:55,759 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:00:55,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:00:56,095 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:00:56,720 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:00:57,627 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:00:57,871 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 13:00:57,892 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:00:57,893 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2018-10-04 13:00:57,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2018-10-04 13:00:57,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2018-10-04 13:00:57,893 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:00:57,893 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 55 states. [2018-10-04 13:01:00,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:00,042 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2018-10-04 13:01:00,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2018-10-04 13:01:00,042 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 55 [2018-10-04 13:01:00,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:00,043 INFO L225 Difference]: With dead ends: 59 [2018-10-04 13:01:00,043 INFO L226 Difference]: Without dead ends: 57 [2018-10-04 13:01:00,043 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.8s impTime 54 [2018-10-04 13:01:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2018-10-04 13:01:00,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2018-10-04 13:01:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2018-10-04 13:01:00,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2018-10-04 13:01:00,047 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2018-10-04 13:01:00,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:00,048 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2018-10-04 13:01:00,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has 55 states. [2018-10-04 13:01:00,048 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2018-10-04 13:01:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2018-10-04 13:01:00,048 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:00,048 INFO L375 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1] [2018-10-04 13:01:00,048 INFO L423 AbstractCegarLoop]: === Iteration 53 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:01:00,048 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:00,049 INFO L82 PathProgramCache]: Analyzing trace with hash 723588964, now seen corresponding path program 52 times [2018-10-04 13:01:00,049 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:00,049 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:00,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:00,049 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:00,049 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:00,055 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:01:00,056 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:01:00,056 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 13:01:00,064 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:01:03,273 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:01:03,273 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:03,285 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:03,589 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:04,216 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:01:05,123 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:01:05,445 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 13:01:05,465 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:01:05,465 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2018-10-04 13:01:05,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2018-10-04 13:01:05,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2018-10-04 13:01:05,466 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:05,466 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 56 states. [2018-10-04 13:01:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:07,682 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2018-10-04 13:01:07,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2018-10-04 13:01:07,683 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 56 [2018-10-04 13:01:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:07,684 INFO L225 Difference]: With dead ends: 60 [2018-10-04 13:01:07,684 INFO L226 Difference]: Without dead ends: 58 [2018-10-04 13:01:07,684 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s Time 1.9s impTime 55 [2018-10-04 13:01:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2018-10-04 13:01:07,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2018-10-04 13:01:07,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2018-10-04 13:01:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2018-10-04 13:01:07,689 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2018-10-04 13:01:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:07,689 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2018-10-04 13:01:07,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has 56 states. [2018-10-04 13:01:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2018-10-04 13:01:07,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-10-04 13:01:07,690 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:07,690 INFO L375 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1] [2018-10-04 13:01:07,690 INFO L423 AbstractCegarLoop]: === Iteration 54 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:01:07,690 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:07,690 INFO L82 PathProgramCache]: Analyzing trace with hash 956419429, now seen corresponding path program 53 times [2018-10-04 13:01:07,690 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:07,690 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:07,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:07,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:07,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:07,697 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:01:07,697 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:01:07,697 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 13:01:07,706 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:01:11,715 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2018-10-04 13:01:11,715 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:11,728 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:12,033 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:12,660 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:01:13,564 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:01:13,939 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 13:01:13,960 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:01:13,960 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2018-10-04 13:01:13,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-10-04 13:01:13,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-10-04 13:01:13,960 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:13,960 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 57 states. [2018-10-04 13:01:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:16,265 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2018-10-04 13:01:16,266 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2018-10-04 13:01:16,266 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 57 [2018-10-04 13:01:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:16,266 INFO L225 Difference]: With dead ends: 61 [2018-10-04 13:01:16,267 INFO L226 Difference]: Without dead ends: 59 [2018-10-04 13:01:16,267 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time 1.9s impTime 56 [2018-10-04 13:01:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2018-10-04 13:01:16,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2018-10-04 13:01:16,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2018-10-04 13:01:16,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2018-10-04 13:01:16,271 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2018-10-04 13:01:16,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:16,271 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2018-10-04 13:01:16,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-10-04 13:01:16,271 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2018-10-04 13:01:16,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2018-10-04 13:01:16,272 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:16,272 INFO L375 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1] [2018-10-04 13:01:16,272 INFO L423 AbstractCegarLoop]: === Iteration 55 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:01:16,272 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:16,272 INFO L82 PathProgramCache]: Analyzing trace with hash -415770748, now seen corresponding path program 54 times [2018-10-04 13:01:16,272 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:16,272 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:16,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:16,273 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:16,273 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:16,279 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:01:16,279 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:01:16,280 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 13:01:16,314 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:01:20,740 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2018-10-04 13:01:20,741 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:20,748 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:21,109 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:21,735 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:01:22,642 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:01:23,094 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 13:01:23,114 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:01:23,114 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2018-10-04 13:01:23,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2018-10-04 13:01:23,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2018-10-04 13:01:23,115 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:23,115 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 58 states. [2018-10-04 13:01:25,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:25,505 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2018-10-04 13:01:25,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2018-10-04 13:01:25,505 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 58 [2018-10-04 13:01:25,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:25,506 INFO L225 Difference]: With dead ends: 62 [2018-10-04 13:01:25,506 INFO L226 Difference]: Without dead ends: 60 [2018-10-04 13:01:25,507 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s Time 2.1s impTime 57 [2018-10-04 13:01:25,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2018-10-04 13:01:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2018-10-04 13:01:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2018-10-04 13:01:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2018-10-04 13:01:25,512 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2018-10-04 13:01:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:25,512 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2018-10-04 13:01:25,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 58 states. [2018-10-04 13:01:25,512 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2018-10-04 13:01:25,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2018-10-04 13:01:25,512 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:25,512 INFO L375 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1] [2018-10-04 13:01:25,513 INFO L423 AbstractCegarLoop]: === Iteration 56 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:01:25,513 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:25,513 INFO L82 PathProgramCache]: Analyzing trace with hash -3993275, now seen corresponding path program 55 times [2018-10-04 13:01:25,513 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:25,513 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:25,513 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:25,514 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:25,514 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:25,519 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:01:25,519 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:01:25,519 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 13:01:25,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:29,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:01:29,200 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:29,516 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:30,153 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:01:31,085 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:01:31,609 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 13:01:31,629 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:01:31,629 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2018-10-04 13:01:31,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2018-10-04 13:01:31,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2018-10-04 13:01:31,630 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:31,630 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 59 states. [2018-10-04 13:01:34,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:34,082 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2018-10-04 13:01:34,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2018-10-04 13:01:34,082 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 59 [2018-10-04 13:01:34,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:34,083 INFO L225 Difference]: With dead ends: 63 [2018-10-04 13:01:34,083 INFO L226 Difference]: Without dead ends: 61 [2018-10-04 13:01:34,084 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s Time 2.1s impTime 58 [2018-10-04 13:01:34,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2018-10-04 13:01:34,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2018-10-04 13:01:34,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2018-10-04 13:01:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2018-10-04 13:01:34,089 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2018-10-04 13:01:34,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:34,090 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2018-10-04 13:01:34,090 INFO L481 AbstractCegarLoop]: Interpolant automaton has 59 states. [2018-10-04 13:01:34,090 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2018-10-04 13:01:34,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2018-10-04 13:01:34,090 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:34,090 INFO L375 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1] [2018-10-04 13:01:34,090 INFO L423 AbstractCegarLoop]: === Iteration 57 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:01:34,091 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:34,091 INFO L82 PathProgramCache]: Analyzing trace with hash -123793500, now seen corresponding path program 56 times [2018-10-04 13:01:34,091 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:34,091 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:34,091 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:34,092 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:01:34,092 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:34,098 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:01:34,098 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:01:34,098 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 13:01:34,113 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:01:37,984 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:01:37,984 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:37,998 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:38,334 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:39,005 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:01:39,910 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:01:40,513 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 13:01:40,533 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:01:40,533 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2018-10-04 13:01:40,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2018-10-04 13:01:40,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2018-10-04 13:01:40,534 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:40,534 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 60 states. [2018-10-04 13:01:43,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:43,086 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2018-10-04 13:01:43,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2018-10-04 13:01:43,087 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 60 [2018-10-04 13:01:43,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:43,087 INFO L225 Difference]: With dead ends: 64 [2018-10-04 13:01:43,088 INFO L226 Difference]: Without dead ends: 62 [2018-10-04 13:01:43,088 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s Time 2.1s impTime 59 [2018-10-04 13:01:43,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2018-10-04 13:01:43,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2018-10-04 13:01:43,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2018-10-04 13:01:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2018-10-04 13:01:43,093 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2018-10-04 13:01:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:43,093 INFO L480 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2018-10-04 13:01:43,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has 60 states. [2018-10-04 13:01:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2018-10-04 13:01:43,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2018-10-04 13:01:43,094 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:43,094 INFO L375 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1] [2018-10-04 13:01:43,094 INFO L423 AbstractCegarLoop]: === Iteration 58 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:01:43,094 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:43,094 INFO L82 PathProgramCache]: Analyzing trace with hash 457366821, now seen corresponding path program 57 times [2018-10-04 13:01:43,094 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:43,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:43,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:43,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:43,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:43,101 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:01:43,101 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:01:43,101 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) [2018-10-04 13:01:43,119 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2018-10-04 13:01:48,227 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2018-10-04 13:01:48,228 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:48,235 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:48,783 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:49,407 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:01:50,311 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:01:50,987 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 13:01:51,007 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:01:51,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2018-10-04 13:01:51,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2018-10-04 13:01:51,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2018-10-04 13:01:51,007 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:01:51,007 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 61 states. [2018-10-04 13:01:53,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:01:53,633 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2018-10-04 13:01:53,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2018-10-04 13:01:53,634 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 61 [2018-10-04 13:01:53,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:01:53,635 INFO L225 Difference]: With dead ends: 65 [2018-10-04 13:01:53,635 INFO L226 Difference]: Without dead ends: 63 [2018-10-04 13:01:53,635 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.4s impTime 60 [2018-10-04 13:01:53,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2018-10-04 13:01:53,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2018-10-04 13:01:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2018-10-04 13:01:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2018-10-04 13:01:53,641 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2018-10-04 13:01:53,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:01:53,642 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2018-10-04 13:01:53,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has 61 states. [2018-10-04 13:01:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2018-10-04 13:01:53,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2018-10-04 13:01:53,642 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:01:53,642 INFO L375 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1] [2018-10-04 13:01:53,643 INFO L423 AbstractCegarLoop]: === Iteration 59 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:01:53,643 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:01:53,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1293467588, now seen corresponding path program 58 times [2018-10-04 13:01:53,643 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:01:53,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:01:53,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:53,644 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:01:53,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:01:53,650 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:01:53,650 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:01:53,650 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 13:01:53,677 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-10-04 13:01:58,358 INFO L242 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-10-04 13:01:58,358 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:01:58,375 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:01:58,733 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:01:59,356 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:02:00,257 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:02:01,012 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 13:02:01,032 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:02:01,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2018-10-04 13:02:01,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2018-10-04 13:02:01,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2018-10-04 13:02:01,033 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:01,033 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 62 states. [2018-10-04 13:02:03,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:03,801 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2018-10-04 13:02:03,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2018-10-04 13:02:03,801 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 62 [2018-10-04 13:02:03,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:03,802 INFO L225 Difference]: With dead ends: 66 [2018-10-04 13:02:03,802 INFO L226 Difference]: Without dead ends: 64 [2018-10-04 13:02:03,802 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s Time 2.3s impTime 61 [2018-10-04 13:02:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2018-10-04 13:02:03,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2018-10-04 13:02:03,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2018-10-04 13:02:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2018-10-04 13:02:03,807 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2018-10-04 13:02:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:03,807 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2018-10-04 13:02:03,807 INFO L481 AbstractCegarLoop]: Interpolant automaton has 62 states. [2018-10-04 13:02:03,807 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2018-10-04 13:02:03,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2018-10-04 13:02:03,807 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:03,807 INFO L375 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1] [2018-10-04 13:02:03,808 INFO L423 AbstractCegarLoop]: === Iteration 60 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:02:03,808 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:03,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1442787589, now seen corresponding path program 59 times [2018-10-04 13:02:03,808 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:03,808 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:03,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:03,809 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:03,809 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:03,815 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:02:03,815 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:02:03,815 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 13:02:03,829 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-10-04 13:02:09,832 INFO L242 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2018-10-04 13:02:09,832 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:09,849 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:10,156 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:02:10,830 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:02:11,735 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:02:12,576 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 13:02:12,597 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:02:12,597 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2018-10-04 13:02:12,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2018-10-04 13:02:12,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2018-10-04 13:02:12,598 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:12,598 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 63 states. [2018-10-04 13:02:15,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:15,417 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2018-10-04 13:02:15,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-10-04 13:02:15,417 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 63 [2018-10-04 13:02:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:15,418 INFO L225 Difference]: With dead ends: 67 [2018-10-04 13:02:15,418 INFO L226 Difference]: Without dead ends: 65 [2018-10-04 13:02:15,418 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.4s impTime 62 [2018-10-04 13:02:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2018-10-04 13:02:15,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2018-10-04 13:02:15,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2018-10-04 13:02:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2018-10-04 13:02:15,423 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2018-10-04 13:02:15,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:15,423 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2018-10-04 13:02:15,423 INFO L481 AbstractCegarLoop]: Interpolant automaton has 63 states. [2018-10-04 13:02:15,423 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2018-10-04 13:02:15,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2018-10-04 13:02:15,424 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:15,424 INFO L375 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1] [2018-10-04 13:02:15,424 INFO L423 AbstractCegarLoop]: === Iteration 61 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:02:15,424 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:15,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1776740324, now seen corresponding path program 60 times [2018-10-04 13:02:15,424 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:15,425 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:15,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:15,425 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:15,425 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:15,432 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:02:15,432 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:02:15,432 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:02:15,449 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-10-04 13:02:21,651 INFO L242 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2018-10-04 13:02:21,651 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:21,659 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:21,962 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:02:22,586 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:02:23,494 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:02:24,411 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 13:02:24,431 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:02:24,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2018-10-04 13:02:24,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2018-10-04 13:02:24,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2018-10-04 13:02:24,432 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:24,432 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 64 states. [2018-10-04 13:02:27,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:27,311 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2018-10-04 13:02:27,312 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-10-04 13:02:27,312 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 64 [2018-10-04 13:02:27,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:27,313 INFO L225 Difference]: With dead ends: 68 [2018-10-04 13:02:27,313 INFO L226 Difference]: Without dead ends: 66 [2018-10-04 13:02:27,313 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s Time 2.5s impTime 63 [2018-10-04 13:02:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2018-10-04 13:02:27,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2018-10-04 13:02:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2018-10-04 13:02:27,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2018-10-04 13:02:27,317 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2018-10-04 13:02:27,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:27,318 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2018-10-04 13:02:27,318 INFO L481 AbstractCegarLoop]: Interpolant automaton has 64 states. [2018-10-04 13:02:27,318 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2018-10-04 13:02:27,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2018-10-04 13:02:27,318 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:27,318 INFO L375 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1] [2018-10-04 13:02:27,318 INFO L423 AbstractCegarLoop]: === Iteration 62 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:02:27,318 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:27,318 INFO L82 PathProgramCache]: Analyzing trace with hash -755626779, now seen corresponding path program 61 times [2018-10-04 13:02:27,319 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:27,319 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:27,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:27,319 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:27,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:27,327 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:02:27,327 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:02:27,328 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 13:02:27,343 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:02:33,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 13:02:33,065 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:33,358 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:02:33,979 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:02:34,887 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:02:35,883 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 13:02:35,904 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:02:35,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2018-10-04 13:02:35,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2018-10-04 13:02:35,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2018-10-04 13:02:35,904 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:35,904 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand 65 states. [2018-10-04 13:02:38,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:38,889 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2018-10-04 13:02:38,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2018-10-04 13:02:38,890 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 65 [2018-10-04 13:02:38,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:38,891 INFO L225 Difference]: With dead ends: 69 [2018-10-04 13:02:38,891 INFO L226 Difference]: Without dead ends: 67 [2018-10-04 13:02:38,891 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s Time 2.5s impTime 64 [2018-10-04 13:02:38,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2018-10-04 13:02:38,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2018-10-04 13:02:38,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2018-10-04 13:02:38,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2018-10-04 13:02:38,897 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2018-10-04 13:02:38,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:38,898 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2018-10-04 13:02:38,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has 65 states. [2018-10-04 13:02:38,898 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2018-10-04 13:02:38,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2018-10-04 13:02:38,898 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:38,898 INFO L375 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1] [2018-10-04 13:02:38,898 INFO L423 AbstractCegarLoop]: === Iteration 63 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:02:38,898 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:38,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1949595644, now seen corresponding path program 62 times [2018-10-04 13:02:38,899 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:38,899 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:38,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:38,899 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 13:02:38,899 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:38,905 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:02:38,905 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:02:38,905 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 13:02:38,922 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-10-04 13:02:44,930 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-10-04 13:02:44,930 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:44,948 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:45,257 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:02:45,880 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:02:46,793 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:02:47,870 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 13:02:47,891 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:02:47,891 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2018-10-04 13:02:47,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2018-10-04 13:02:47,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2018-10-04 13:02:47,892 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:02:47,892 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 66 states. [2018-10-04 13:02:50,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:02:50,944 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2018-10-04 13:02:50,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2018-10-04 13:02:50,944 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 66 [2018-10-04 13:02:50,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:02:50,945 INFO L225 Difference]: With dead ends: 70 [2018-10-04 13:02:50,945 INFO L226 Difference]: Without dead ends: 68 [2018-10-04 13:02:50,945 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s Time 2.6s impTime 65 [2018-10-04 13:02:50,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2018-10-04 13:02:50,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2018-10-04 13:02:50,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2018-10-04 13:02:50,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2018-10-04 13:02:50,950 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2018-10-04 13:02:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:02:50,950 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2018-10-04 13:02:50,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has 66 states. [2018-10-04 13:02:50,950 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2018-10-04 13:02:50,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2018-10-04 13:02:50,950 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:02:50,950 INFO L375 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1] [2018-10-04 13:02:50,951 INFO L423 AbstractCegarLoop]: === Iteration 64 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:02:50,951 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:02:50,951 INFO L82 PathProgramCache]: Analyzing trace with hash -307924795, now seen corresponding path program 63 times [2018-10-04 13:02:50,951 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:02:50,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:02:50,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:50,952 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:02:50,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:02:50,958 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:02:50,958 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:02:50,958 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 13:02:50,973 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-10-04 13:02:58,955 INFO L242 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2018-10-04 13:02:58,955 INFO L243 tOrderPrioritization]: Conjunction of SSA is unsat [2018-10-04 13:02:58,964 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 13:02:59,400 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 19 new depth: 19 [2018-10-04 13:03:00,021 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 35 new depth: 35 [2018-10-04 13:03:00,933 INFO L252 BPredicateUnifier]: --------PredicateTrie is restructured: old depths: 50 new depth: 50 [2018-10-04 13:03:02,121 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 13:03:02,141 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2018-10-04 13:03:02,141 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2018-10-04 13:03:02,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2018-10-04 13:03:02,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2018-10-04 13:03:02,142 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 13:03:02,142 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 67 states. [2018-10-04 13:03:05,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 13:03:05,292 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2018-10-04 13:03:05,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-10-04 13:03:05,293 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 67 [2018-10-04 13:03:05,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 13:03:05,294 INFO L225 Difference]: With dead ends: 71 [2018-10-04 13:03:05,294 INFO L226 Difference]: Without dead ends: 69 [2018-10-04 13:03:05,294 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 13:03:05,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2018-10-04 13:03:05,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2018-10-04 13:03:05,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2018-10-04 13:03:05,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2018-10-04 13:03:05,300 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2018-10-04 13:03:05,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 13:03:05,300 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2018-10-04 13:03:05,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has 67 states. [2018-10-04 13:03:05,301 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2018-10-04 13:03:05,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2018-10-04 13:03:05,301 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 13:03:05,301 INFO L375 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1] [2018-10-04 13:03:05,301 INFO L423 AbstractCegarLoop]: === Iteration 65 === [multErr0ENSURES_VIOLATIONPOST_CONDITION]=== [2018-10-04 13:03:05,302 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 13:03:05,302 INFO L82 PathProgramCache]: Analyzing trace with hash -955736028, now seen corresponding path program 64 times [2018-10-04 13:03:05,302 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 13:03:05,302 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 13:03:05,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:03:05,303 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-10-04 13:03:05,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 13:03:05,310 ERROR L235 seRefinementStrategy]: Caught known exception: Unsupported non-linear arithmetic [2018-10-04 13:03:05,310 INFO L258 seRefinementStrategy]: Advancing trace checker [2018-10-04 13:03:05,310 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 13:03:05,323 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown