java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loops/string-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:25:08,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:25:08,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:25:08,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:25:08,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:25:08,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:25:08,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:25:08,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:25:08,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:25:08,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:25:08,321 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:25:08,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:25:08,323 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:25:08,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:25:08,325 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:25:08,326 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:25:08,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:25:08,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:25:08,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:25:08,332 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:25:08,333 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:25:08,334 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:25:08,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:25:08,338 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:25:08,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:25:08,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:25:08,349 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:25:08,350 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:25:08,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:25:08,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:25:08,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:25:08,356 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:25:08,356 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:25:08,356 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:25:08,358 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:25:08,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:25:08,361 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-20 13:25:08,382 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:25:08,382 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:25:08,383 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:25:08,383 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:25:08,384 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:25:08,384 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:25:08,384 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:25:08,384 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:25:08,385 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:25:08,385 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:25:08,387 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:25:08,387 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:25:08,387 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:25:08,387 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:25:08,388 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:25:08,388 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:25:08,388 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:25:08,388 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:25:08,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:25:08,389 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:25:08,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:25:08,389 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:25:08,389 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:25:08,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:08,390 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:25:08,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:25:08,390 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:25:08,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:25:08,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:25:08,391 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:25:08,430 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:25:08,441 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:25:08,445 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:25:08,446 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:25:08,446 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:25:08,447 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-2.i [2019-09-20 13:25:08,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a52b1bc2/70edd2171b2f49c4ab2cb13017d17c43/FLAGce47b9a51 [2019-09-20 13:25:08,957 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:25:08,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-2.i [2019-09-20 13:25:08,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a52b1bc2/70edd2171b2f49c4ab2cb13017d17c43/FLAGce47b9a51 [2019-09-20 13:25:09,351 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a52b1bc2/70edd2171b2f49c4ab2cb13017d17c43 [2019-09-20 13:25:09,360 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:25:09,362 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:25:09,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:09,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:25:09,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:25:09,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:09" (1/1) ... [2019-09-20 13:25:09,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@210016e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:09, skipping insertion in model container [2019-09-20 13:25:09,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:09" (1/1) ... [2019-09-20 13:25:09,378 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:25:09,396 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:25:09,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:09,595 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:25:09,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:09,730 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:25:09,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:09 WrapperNode [2019-09-20 13:25:09,731 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:09,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:25:09,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:25:09,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:25:09,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:09" (1/1) ... [2019-09-20 13:25:09,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:09" (1/1) ... [2019-09-20 13:25:09,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:09" (1/1) ... [2019-09-20 13:25:09,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:09" (1/1) ... [2019-09-20 13:25:09,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:09" (1/1) ... [2019-09-20 13:25:09,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:09" (1/1) ... [2019-09-20 13:25:09,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:09" (1/1) ... [2019-09-20 13:25:09,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:25:09,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:25:09,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:25:09,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:25:09,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:09" (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 [2019-09-20 13:25:09,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:25:09,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:25:09,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-20 13:25:09,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:25:09,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:25:09,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 13:25:09,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:25:09,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-09-20 13:25:09,860 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:25:09,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:25:09,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:25:09,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:25:09,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:25:09,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:25:09,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:25:10,154 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:25:10,154 INFO L283 CfgBuilder]: Removed 5 assume(true) statements. [2019-09-20 13:25:10,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:10 BoogieIcfgContainer [2019-09-20 13:25:10,156 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:25:10,157 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:25:10,157 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:25:10,160 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:25:10,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:25:09" (1/3) ... [2019-09-20 13:25:10,161 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39af30ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:10, skipping insertion in model container [2019-09-20 13:25:10,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:09" (2/3) ... [2019-09-20 13:25:10,162 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39af30ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:10, skipping insertion in model container [2019-09-20 13:25:10,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:10" (3/3) ... [2019-09-20 13:25:10,167 INFO L109 eAbstractionObserver]: Analyzing ICFG string-2.i [2019-09-20 13:25:10,180 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:25:10,189 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:25:10,211 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:25:10,273 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:25:10,274 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:25:10,274 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:25:10,275 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:25:10,276 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:25:10,276 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:25:10,276 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:25:10,276 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:25:10,294 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-09-20 13:25:10,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-20 13:25:10,310 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:10,312 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:10,314 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:10,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:10,324 INFO L82 PathProgramCache]: Analyzing trace with hash -99599224, now seen corresponding path program 1 times [2019-09-20 13:25:10,326 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:10,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:10,370 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:10,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:10,370 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:10,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:10,456 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:10,457 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-20 13:25:10,457 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:10,462 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:25:10,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:25:10,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:25:10,483 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2019-09-20 13:25:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:10,509 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2019-09-20 13:25:10,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:25:10,511 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2019-09-20 13:25:10,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:10,527 INFO L225 Difference]: With dead ends: 35 [2019-09-20 13:25:10,527 INFO L226 Difference]: Without dead ends: 28 [2019-09-20 13:25:10,532 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:25:10,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-20 13:25:10,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-20 13:25:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-20 13:25:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-09-20 13:25:10,591 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2019-09-20 13:25:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:10,592 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-09-20 13:25:10,592 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:25:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-09-20 13:25:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-09-20 13:25:10,595 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:10,596 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:10,597 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:10,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:10,597 INFO L82 PathProgramCache]: Analyzing trace with hash 930552028, now seen corresponding path program 1 times [2019-09-20 13:25:10,598 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:10,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:10,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:10,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:10,606 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:10,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:10,743 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:10,743 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-20 13:25:10,744 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:10,748 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-20 13:25:10,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-20 13:25:10,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:25:10,750 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-09-20 13:25:10,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:10,818 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2019-09-20 13:25:10,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-20 13:25:10,819 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-09-20 13:25:10,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:10,822 INFO L225 Difference]: With dead ends: 36 [2019-09-20 13:25:10,823 INFO L226 Difference]: Without dead ends: 36 [2019-09-20 13:25:10,824 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-20 13:25:10,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-20 13:25:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-09-20 13:25:10,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-20 13:25:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-09-20 13:25:10,832 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2019-09-20 13:25:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:10,832 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-09-20 13:25:10,833 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-20 13:25:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-09-20 13:25:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-20 13:25:10,834 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:10,834 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:10,834 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:10,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:10,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1358146588, now seen corresponding path program 1 times [2019-09-20 13:25:10,835 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:10,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:10,837 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:10,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:10,838 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:10,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-20 13:25:10,937 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:10,938 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:25:10,938 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 29 with the following transitions: [2019-09-20 13:25:10,941 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [23], [29], [31], [33], [37], [41], [46], [49], [55], [60], [63], [72], [79], [91], [95], [98], [100], [106], [107], [108], [110] [2019-09-20 13:25:10,987 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:25:10,987 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:25:11,053 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-20 13:25:11,055 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 29 variables. [2019-09-20 13:25:11,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:11,059 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-20 13:25:11,097 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-20 13:25:11,098 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-20 13:25:11,100 INFO L420 sIntCurrentIteration]: We unified 27 AI predicates to 27 [2019-09-20 13:25:11,100 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-20 13:25:11,101 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-20 13:25:11,101 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2019-09-20 13:25:11,102 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:11,102 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-20 13:25:11,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-20 13:25:11,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:25:11,103 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 2 states. [2019-09-20 13:25:11,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:11,104 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-20 13:25:11,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-20 13:25:11,104 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 28 [2019-09-20 13:25:11,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:11,104 INFO L225 Difference]: With dead ends: 6 [2019-09-20 13:25:11,104 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:25:11,105 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-20 13:25:11,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:25:11,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:25:11,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:25:11,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:25:11,106 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2019-09-20 13:25:11,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:11,106 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:25:11,106 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-20 13:25:11,107 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:25:11,107 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:25:11,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:25:11 BoogieIcfgContainer [2019-09-20 13:25:11,112 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:25:11,115 INFO L168 Benchmark]: Toolchain (without parser) took 1751.82 ms. Allocated memory was 131.6 MB in the beginning and 198.2 MB in the end (delta: 66.6 MB). Free memory was 86.8 MB in the beginning and 108.8 MB in the end (delta: -21.9 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:11,116 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 131.6 MB. Free memory is still 105.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-20 13:25:11,117 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.30 ms. Allocated memory was 131.6 MB in the beginning and 198.2 MB in the end (delta: 66.6 MB). Free memory was 86.8 MB in the beginning and 174.0 MB in the end (delta: -87.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:11,118 INFO L168 Benchmark]: Boogie Preprocessor took 63.62 ms. Allocated memory is still 198.2 MB. Free memory was 174.0 MB in the beginning and 172.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:11,118 INFO L168 Benchmark]: RCFGBuilder took 360.12 ms. Allocated memory is still 198.2 MB. Free memory was 172.2 MB in the beginning and 153.5 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:11,119 INFO L168 Benchmark]: TraceAbstraction took 955.28 ms. Allocated memory is still 198.2 MB. Free memory was 153.5 MB in the beginning and 108.8 MB in the end (delta: 44.7 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:11,123 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 131.6 MB. Free memory is still 105.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 368.30 ms. Allocated memory was 131.6 MB in the beginning and 198.2 MB in the end (delta: 66.6 MB). Free memory was 86.8 MB in the beginning and 174.0 MB in the end (delta: -87.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 63.62 ms. Allocated memory is still 198.2 MB. Free memory was 174.0 MB in the beginning and 172.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 360.12 ms. Allocated memory is still 198.2 MB. Free memory was 172.2 MB in the beginning and 153.5 MB in the end (delta: 18.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 955.28 ms. Allocated memory is still 198.2 MB. Free memory was 153.5 MB in the beginning and 108.8 MB in the end (delta: 44.7 MB). Peak memory consumption was 44.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 35 locations, 1 error locations. SAFE Result, 0.8s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 73 SDtfs, 5 SDslu, 20 SDs, 0 SdLazy, 18 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 1 AbstIntStrong, 0.9166666666666666 AbsIntWeakeningRatio, 0.9259259259259259 AbsIntAvgWeakeningVarsNumRemoved, 0.2222222222222222 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 1907 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 1/2 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...