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/array-crafted/xor4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 05:35:09,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 05:35:09,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 05:35:09,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 05:35:09,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 05:35:09,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 05:35:09,297 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 05:35:09,298 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 05:35:09,301 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 05:35:09,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 05:35:09,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 05:35:09,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 05:35:09,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 05:35:09,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 05:35:09,307 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 05:35:09,310 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 [2019-09-09 05:35:09,340 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 05:35:09,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 05:35:09,344 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 05:35:09,344 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 05:35:09,345 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 05:35:09,346 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 05:35:09,347 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 05:35:09,347 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 05:35:09,347 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 05:35:09,347 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 05:35:09,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 05:35:09,350 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 05:35:09,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 05:35:09,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 05:35:09,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 05:35:09,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 05:35:09,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 05:35:09,352 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 05:35:09,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 05:35:09,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 05:35:09,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 05:35:09,353 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 05:35:09,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 05:35:09,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 05:35:09,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 05:35:09,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 05:35:09,354 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 05:35:09,354 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 05:35:09,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 05:35:09,355 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 05:35:09,418 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 05:35:09,439 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 05:35:09,444 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 05:35:09,446 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 05:35:09,447 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 05:35:09,448 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/xor4.i [2019-09-09 05:35:09,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4777609a8/e771c978b2b84904948ac15cd14cef48/FLAGaa9586e25 [2019-09-09 05:35:10,028 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 05:35:10,029 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/xor4.i [2019-09-09 05:35:10,037 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4777609a8/e771c978b2b84904948ac15cd14cef48/FLAGaa9586e25 [2019-09-09 05:35:10,349 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4777609a8/e771c978b2b84904948ac15cd14cef48 [2019-09-09 05:35:10,360 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 05:35:10,361 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 05:35:10,362 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 05:35:10,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 05:35:10,367 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 05:35:10,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:35:10" (1/1) ... [2019-09-09 05:35:10,374 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c6c6cf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:10, skipping insertion in model container [2019-09-09 05:35:10,374 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:35:10" (1/1) ... [2019-09-09 05:35:10,384 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 05:35:10,409 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 05:35:10,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 05:35:10,704 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 05:35:10,730 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 05:35:10,847 INFO L192 MainTranslator]: Completed translation [2019-09-09 05:35:10,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:10 WrapperNode [2019-09-09 05:35:10,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 05:35:10,850 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 05:35:10,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 05:35:10,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 05:35:10,865 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:10" (1/1) ... [2019-09-09 05:35:10,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:10" (1/1) ... [2019-09-09 05:35:10,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:10" (1/1) ... [2019-09-09 05:35:10,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:10" (1/1) ... [2019-09-09 05:35:10,892 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:10" (1/1) ... [2019-09-09 05:35:10,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:10" (1/1) ... [2019-09-09 05:35:10,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:10" (1/1) ... [2019-09-09 05:35:10,903 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 05:35:10,904 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 05:35:10,904 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 05:35:10,904 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 05:35:10,906 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:10" (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 [2019-09-09 05:35:10,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 05:35:10,966 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 05:35:10,966 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2019-09-09 05:35:10,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 05:35:10,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 05:35:10,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 05:35:10,967 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2019-09-09 05:35:10,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-09 05:35:10,967 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 05:35:10,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-09 05:35:10,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-09 05:35:10,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-09 05:35:10,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 05:35:10,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 05:35:11,284 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 05:35:11,284 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-09 05:35:11,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:35:11 BoogieIcfgContainer [2019-09-09 05:35:11,286 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 05:35:11,287 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 05:35:11,287 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 05:35:11,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 05:35:11,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:35:10" (1/3) ... [2019-09-09 05:35:11,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642d728d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:35:11, skipping insertion in model container [2019-09-09 05:35:11,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:35:10" (2/3) ... [2019-09-09 05:35:11,294 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642d728d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:35:11, skipping insertion in model container [2019-09-09 05:35:11,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:35:11" (3/3) ... [2019-09-09 05:35:11,296 INFO L109 eAbstractionObserver]: Analyzing ICFG xor4.i [2019-09-09 05:35:11,309 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 05:35:11,318 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 05:35:11,338 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 05:35:11,371 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 05:35:11,371 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 05:35:11,372 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 05:35:11,372 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 05:35:11,372 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 05:35:11,373 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 05:35:11,373 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 05:35:11,373 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 05:35:11,389 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-09-09 05:35:11,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-09 05:35:11,401 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:35:11,402 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 05:35:11,404 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:35:11,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:11,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1461178031, now seen corresponding path program 1 times [2019-09-09 05:35:11,411 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:35:11,453 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:11,454 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:35:11,454 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:11,454 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:35:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:35:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-09 05:35:11,571 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 05:35:11,571 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-09 05:35:11,572 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:35:11,578 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-09 05:35:11,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-09 05:35:11,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-09 05:35:11,599 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-09-09 05:35:11,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:35:11,616 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-09-09 05:35:11,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-09 05:35:11,618 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-09-09 05:35:11,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:35:11,627 INFO L225 Difference]: With dead ends: 31 [2019-09-09 05:35:11,627 INFO L226 Difference]: Without dead ends: 26 [2019-09-09 05:35:11,629 INFO L628 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 [2019-09-09 05:35:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-09 05:35:11,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-09 05:35:11,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-09 05:35:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-09 05:35:11,676 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-09-09 05:35:11,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:35:11,677 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-09 05:35:11,677 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-09 05:35:11,677 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-09 05:35:11,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-09 05:35:11,680 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:35:11,680 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 05:35:11,681 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:35:11,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:11,681 INFO L82 PathProgramCache]: Analyzing trace with hash -595992629, now seen corresponding path program 1 times [2019-09-09 05:35:11,681 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:35:11,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:11,683 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:35:11,683 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:11,683 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:35:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:35:11,779 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-09 05:35:11,780 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 05:35:11,780 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 05:35:11,780 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:35:11,787 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 05:35:11,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 05:35:11,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 05:35:11,788 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-09-09 05:35:11,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:35:11,840 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2019-09-09 05:35:11,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 05:35:11,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-09 05:35:11,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:35:11,843 INFO L225 Difference]: With dead ends: 28 [2019-09-09 05:35:11,843 INFO L226 Difference]: Without dead ends: 28 [2019-09-09 05:35:11,844 INFO L628 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 [2019-09-09 05:35:11,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-09 05:35:11,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-09 05:35:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-09 05:35:11,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-09 05:35:11,855 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-09-09 05:35:11,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:35:11,855 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-09 05:35:11,856 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 05:35:11,856 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-09 05:35:11,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-09 05:35:11,859 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:35:11,860 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 05:35:11,860 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:35:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:11,863 INFO L82 PathProgramCache]: Analyzing trace with hash 169606189, now seen corresponding path program 1 times [2019-09-09 05:35:11,863 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:35:11,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:11,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:35:11,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:35:11,867 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:35:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:35:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-09 05:35:11,995 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 05:35:11,995 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 05:35:11,997 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 35 with the following transitions: [2019-09-09 05:35:11,999 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [19], [20], [21], [27], [29], [31], [36], [38], [44], [52], [54], [57], [58], [65], [66], [67], [69], [70], [71], [72], [73], [74] [2019-09-09 05:35:12,044 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 05:35:12,044 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 05:35:12,125 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 05:35:12,127 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 28 variables. [2019-09-09 05:35:12,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:35:12,131 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 05:35:12,178 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-09 05:35:12,178 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 05:35:12,182 INFO L420 sIntCurrentIteration]: We unified 33 AI predicates to 33 [2019-09-09 05:35:12,182 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 05:35:12,185 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 05:35:12,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 3 [2019-09-09 05:35:12,186 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:35:12,187 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-09 05:35:12,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-09 05:35:12,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-09 05:35:12,188 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 2 states. [2019-09-09 05:35:12,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:35:12,192 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-09 05:35:12,192 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-09 05:35:12,192 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 34 [2019-09-09 05:35:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:35:12,193 INFO L225 Difference]: With dead ends: 6 [2019-09-09 05:35:12,194 INFO L226 Difference]: Without dead ends: 0 [2019-09-09 05:35:12,195 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-09 05:35:12,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-09 05:35:12,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-09 05:35:12,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-09 05:35:12,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-09 05:35:12,196 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2019-09-09 05:35:12,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:35:12,196 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-09 05:35:12,196 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-09 05:35:12,196 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-09 05:35:12,197 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-09 05:35:12,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.09 05:35:12 BoogieIcfgContainer [2019-09-09 05:35:12,204 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-09 05:35:12,209 INFO L168 Benchmark]: Toolchain (without parser) took 1845.08 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 88.3 MB in the beginning and 114.9 MB in the end (delta: -26.6 MB). Peak memory consumption was 40.0 MB. Max. memory is 7.1 GB. [2019-09-09 05:35:12,212 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 132.1 MB. Free memory was 106.5 MB in the beginning and 106.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-09 05:35:12,214 INFO L168 Benchmark]: CACSL2BoogieTranslator took 486.86 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 88.1 MB in the beginning and 176.1 MB in the end (delta: -88.0 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. [2019-09-09 05:35:12,216 INFO L168 Benchmark]: Boogie Preprocessor took 54.10 ms. Allocated memory is still 198.7 MB. Free memory was 176.1 MB in the beginning and 173.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2019-09-09 05:35:12,218 INFO L168 Benchmark]: RCFGBuilder took 381.71 ms. Allocated memory is still 198.7 MB. Free memory was 173.2 MB in the beginning and 157.2 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. [2019-09-09 05:35:12,219 INFO L168 Benchmark]: TraceAbstraction took 917.62 ms. Allocated memory is still 198.7 MB. Free memory was 157.2 MB in the beginning and 114.9 MB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. [2019-09-09 05:35:12,231 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 132.1 MB. Free memory was 106.5 MB in the beginning and 106.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 486.86 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 88.1 MB in the beginning and 176.1 MB in the end (delta: -88.0 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.10 ms. Allocated memory is still 198.7 MB. Free memory was 176.1 MB in the beginning and 173.2 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 381.71 ms. Allocated memory is still 198.7 MB. Free memory was 173.2 MB in the beginning and 157.2 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 917.62 ms. Allocated memory is still 198.7 MB. Free memory was 157.2 MB in the beginning and 114.9 MB in the end (delta: 42.3 MB). Peak memory consumption was 42.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: 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, 31 locations, 1 error locations. SAFE Result, 0.8s OverallTime, 3 OverallIterations, 3 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 68 SDtfs, 1 SDslu, 26 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 38 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred 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, 0.946969696969697 AbsIntWeakeningRatio, 1.393939393939394 AbsIntAvgWeakeningVarsNumRemoved, 0.18181818181818182 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 98 NumberOfCodeBlocks, 98 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 95 ConstructedInterpolants, 0 QuantifiedInterpolants, 3139 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 38/46 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...