java -Xmx8000000000 -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data --generate-csv --csv-dir csv -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -s ../../../trunk/examples/settings/pu-bench/svcomp-Reach-32bit-Automizer_Default_PUPT.epf -i ../../../trunk/examples/programs/20170304-DifficultPathPrograms/invert_string.i_4.bpl -------------------------------------------------------------------------------- This is Ultimate 0.1.23-9f4048f [2018-10-04 12:50:56,337 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-10-04 12:50:56,339 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-10-04 12:50:56,350 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-10-04 12:50:56,351 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-10-04 12:50:56,354 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-10-04 12:50:56,355 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-10-04 12:50:56,358 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-10-04 12:50:56,361 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-10-04 12:50:56,363 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-10-04 12:50:56,367 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-10-04 12:50:56,367 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-10-04 12:50:56,368 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-10-04 12:50:56,372 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-10-04 12:50:56,376 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-10-04 12:50:56,377 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-10-04 12:50:56,378 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-10-04 12:50:56,380 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-10-04 12:50:56,381 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-10-04 12:50:56,383 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-10-04 12:50:56,384 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-10-04 12:50:56,387 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-10-04 12:50:56,389 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-10-04 12:50:56,389 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-10-04 12:50:56,389 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-10-04 12:50:56,390 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-10-04 12:50:56,394 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-10-04 12:50:56,395 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-10-04 12:50:56,395 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-10-04 12:50:56,399 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-10-04 12:50:56,399 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-10-04 12:50:56,400 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-10-04 12:50:56,400 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-10-04 12:50:56,400 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-10-04 12:50:56,401 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-10-04 12:50:56,402 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-10-04 12:50:56,402 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 12:50:56,432 INFO L110 SettingsManager]: Loading preferences was successful [2018-10-04 12:50:56,433 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-10-04 12:50:56,434 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-10-04 12:50:56,436 INFO L133 SettingsManager]: * to procedures, called more than once=true [2018-10-04 12:50:56,437 INFO L131 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2018-10-04 12:50:56,437 INFO L133 SettingsManager]: * Create parallel compositions if possible=false [2018-10-04 12:50:56,437 INFO L133 SettingsManager]: * Use SBE=true [2018-10-04 12:50:56,437 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-10-04 12:50:56,437 INFO L133 SettingsManager]: * sizeof long=4 [2018-10-04 12:50:56,438 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-10-04 12:50:56,438 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-10-04 12:50:56,438 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-10-04 12:50:56,438 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-10-04 12:50:56,438 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-10-04 12:50:56,438 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-10-04 12:50:56,439 INFO L133 SettingsManager]: * sizeof long double=12 [2018-10-04 12:50:56,440 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-10-04 12:50:56,440 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-10-04 12:50:56,440 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-10-04 12:50:56,440 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-10-04 12:50:56,440 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-10-04 12:50:56,441 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-10-04 12:50:56,441 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-10-04 12:50:56,441 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-10-04 12:50:56,441 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-10-04 12:50:56,442 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-10-04 12:50:56,442 INFO L133 SettingsManager]: * Trace refinement strategy=CAMEL [2018-10-04 12:50:56,442 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-10-04 12:50:56,442 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-10-04 12:50:56,442 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-10-04 12:50:56,443 INFO L133 SettingsManager]: * Use predicate trie based predicate unification=true [2018-10-04 12:50:56,485 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-10-04 12:50:56,497 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-10-04 12:50:56,501 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-10-04 12:50:56,502 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2018-10-04 12:50:56,503 INFO L276 PluginConnector]: Boogie PL CUP Parser initialized [2018-10-04 12:50:56,503 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/invert_string.i_4.bpl [2018-10-04 12:50:56,504 INFO L111 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/programs/20170304-DifficultPathPrograms/invert_string.i_4.bpl' [2018-10-04 12:50:56,565 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-10-04 12:50:56,567 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2018-10-04 12:50:56,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-10-04 12:50:56,568 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-10-04 12:50:56,568 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-10-04 12:50:56,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:50:56" (1/1) ... [2018-10-04 12:50:56,601 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:50:56" (1/1) ... [2018-10-04 12:50:56,608 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-10-04 12:50:56,609 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-10-04 12:50:56,609 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-10-04 12:50:56,609 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-10-04 12:50:56,620 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:50:56" (1/1) ... [2018-10-04 12:50:56,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:50:56" (1/1) ... [2018-10-04 12:50:56,621 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:50:56" (1/1) ... [2018-10-04 12:50:56,621 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:50:56" (1/1) ... [2018-10-04 12:50:56,625 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:50:56" (1/1) ... [2018-10-04 12:50:56,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:50:56" (1/1) ... [2018-10-04 12:50:56,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:50:56" (1/1) ... [2018-10-04 12:50:56,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-10-04 12:50:56,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-10-04 12:50:56,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-10-04 12:50:56,630 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-10-04 12:50:56,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:50:56" (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 12:50:56,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-10-04 12:50:56,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-10-04 12:50:56,955 INFO L341 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-10-04 12:50:56,955 INFO L202 PluginConnector]: Adding new model invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:50:56 BoogieIcfgContainer [2018-10-04 12:50:56,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-10-04 12:50:56,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-10-04 12:50:56,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-10-04 12:50:56,960 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-10-04 12:50:56,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 04.10 12:50:56" (1/2) ... [2018-10-04 12:50:56,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aeed340 and model type invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.10 12:50:56, skipping insertion in model container [2018-10-04 12:50:56,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "invert_string.i_4.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.10 12:50:56" (2/2) ... [2018-10-04 12:50:56,964 INFO L112 eAbstractionObserver]: Analyzing ICFG invert_string.i_4.bpl [2018-10-04 12:50:56,973 INFO L136 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-10-04 12:50:56,981 INFO L148 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-10-04 12:50:57,034 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-10-04 12:50:57,035 INFO L381 AbstractCegarLoop]: Interprodecural is true [2018-10-04 12:50:57,036 INFO L382 AbstractCegarLoop]: Hoare is true [2018-10-04 12:50:57,036 INFO L383 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-10-04 12:50:57,036 INFO L384 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-10-04 12:50:57,036 INFO L385 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-10-04 12:50:57,036 INFO L386 AbstractCegarLoop]: Difference is false [2018-10-04 12:50:57,036 INFO L387 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-10-04 12:50:57,039 INFO L392 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-10-04 12:50:57,055 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2018-10-04 12:50:57,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2018-10-04 12:50:57,072 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:57,073 INFO L375 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2018-10-04 12:50:57,080 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:57,089 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:57,089 INFO L82 PathProgramCache]: Analyzing trace with hash 889539531, now seen corresponding path program 1 times [2018-10-04 12:50:57,092 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:57,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:57,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:57,146 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:50:57,146 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:57,385 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 12:50:57,389 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-10-04 12:50:57,389 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2018-10-04 12:50:57,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2018-10-04 12:50:57,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2018-10-04 12:50:57,411 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:57,413 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2018-10-04 12:50:57,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:57,531 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2018-10-04 12:50:57,531 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2018-10-04 12:50:57,533 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2018-10-04 12:50:57,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:57,544 INFO L225 Difference]: With dead ends: 15 [2018-10-04 12:50:57,544 INFO L226 Difference]: Without dead ends: 9 [2018-10-04 12:50:57,547 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.1s impTime 3 [2018-10-04 12:50:57,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2018-10-04 12:50:57,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2018-10-04 12:50:57,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2018-10-04 12:50:57,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2018-10-04 12:50:57,576 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2018-10-04 12:50:57,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:57,577 INFO L480 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2018-10-04 12:50:57,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2018-10-04 12:50:57,577 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2018-10-04 12:50:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2018-10-04 12:50:57,577 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:57,577 INFO L375 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:50:57,578 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:57,578 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:57,578 INFO L82 PathProgramCache]: Analyzing trace with hash 198621957, now seen corresponding path program 1 times [2018-10-04 12:50:57,578 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:57,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:57,579 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:57,579 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:50:57,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:57,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:57,677 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-10-04 12:50:57,677 INFO L227 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-10-04 12:50:57,686 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:50:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:57,723 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-10-04 12:50:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-10-04 12:50:57,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2018-10-04 12:50:57,819 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2018-10-04 12:50:57,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-10-04 12:50:57,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-10-04 12:50:57,820 INFO L146 InterpolantAutomaton]: No coverage relation statistics for ImplicationMap [2018-10-04 12:50:57,820 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 5 states. [2018-10-04 12:50:57,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-10-04 12:50:57,884 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2018-10-04 12:50:57,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-10-04 12:50:57,887 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2018-10-04 12:50:57,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-10-04 12:50:57,888 INFO L225 Difference]: With dead ends: 13 [2018-10-04 12:50:57,888 INFO L226 Difference]: Without dead ends: 11 [2018-10-04 12:50:57,889 INFO L605 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time 0.0s impTime 4 [2018-10-04 12:50:57,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2018-10-04 12:50:57,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2018-10-04 12:50:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2018-10-04 12:50:57,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2018-10-04 12:50:57,894 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2018-10-04 12:50:57,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-10-04 12:50:57,894 INFO L480 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2018-10-04 12:50:57,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-10-04 12:50:57,894 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2018-10-04 12:50:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2018-10-04 12:50:57,895 INFO L367 BasicCegarLoop]: Found error trace [2018-10-04 12:50:57,895 INFO L375 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2018-10-04 12:50:57,895 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2018-10-04 12:50:57,896 INFO L108 BPredicateUnifier]: Initialized predicate-trie based predicate unifier [2018-10-04 12:50:57,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1897191999, now seen corresponding path program 1 times [2018-10-04 12:50:57,896 INFO L227 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2018-10-04 12:50:57,896 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2018-10-04 12:50:57,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:57,897 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-10-04 12:50:57,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-10-04 12:50:57,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-10-04 12:50:58,120 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Cannot provide value for term c_ULTIMATE.start_main_~str2~6 of sort (Array Int Int) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.getValue(Scriptor.java:183) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.WrapperScript.getValue(WrapperScript.java:146) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.biesenb.PredicateTrie.compare(PredicateTrie.java:184) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.biesenb.PredicateTrie.unifyPredicate(PredicateTrie.java:110) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.biesenb.BPredicateUnifier.getOrConstructPredicateInternal(BPredicateUnifier.java:230) at de.uni_freiburg.informatik.ultimate.modelcheckerutils.smt.biesenb.BPredicateUnifier.getOrConstructPredicate(BPredicateUnifier.java:218) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.computePredicates(NestedInterpolantsBuilder.java:592) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsTree(InterpolatingTraceCheckCraig.java:271) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructCraig(TraceCheckConstructor.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.constructTraceCheck(TraceCheckConstructor.java:183) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceCheckConstructor.get(TraceCheckConstructor.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.MultiTrackRefinementStrategy.getTraceCheck(MultiTrackRefinementStrategy.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.checkFeasibility(BaseRefinementStrategy.java:223) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:429) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:375) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:312) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2018-10-04 12:50:58,123 INFO L168 Benchmark]: Toolchain (without parser) took 1557.60 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 76.7 MB). Peak memory consumption was 76.7 MB. Max. memory is 7.1 GB. [2018-10-04 12:50:58,126 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:50:58,127 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.78 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:50:58,127 INFO L168 Benchmark]: Boogie Preprocessor took 20.67 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. [2018-10-04 12:50:58,128 INFO L168 Benchmark]: RCFGBuilder took 325.88 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2018-10-04 12:50:58,129 INFO L168 Benchmark]: TraceAbstraction took 1165.95 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. [2018-10-04 12:50:58,134 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.20 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 40.78 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.67 ms. Allocated memory is still 1.6 GB. Free memory is still 1.5 GB. There was no memory consumed. Max. memory is 7.1 GB. * RCFGBuilder took 325.88 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.5 GB in the end (delta: 21.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1165.95 ms. Allocated memory is still 1.6 GB. Free memory was 1.5 GB in the beginning and 1.4 GB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Cannot provide value for term c_ULTIMATE.start_main_~str2~6 of sort (Array Int Int) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Cannot provide value for term c_ULTIMATE.start_main_~str2~6 of sort (Array Int Int): de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.getValue(Scriptor.java:183) RESULT: Ultimate could not prove your program: Toolchain returned no result. Written .csv to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/csv/invert_string.i_4.bpl_svcomp-Reach-32bit-Automizer_Default_PUPT.epf_AutomizerBplInline.xml/Csv-Benchmark-0-2018-10-04_12-50-58-147.csv Received shutdown request...