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/ldv-regression/test23-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 01:46:25,191 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 01:46:25,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 01:46:25,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 01:46:25,215 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-10 01:46:25,216 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-10 01:46:25,217 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-10 01:46:25,218 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-10 01:46:25,219 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-10 01:46:25,220 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-10 01:46:25,222 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-10 01:46:25,224 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-10 01:46:25,226 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-10 01:46:25,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-10 01:46:25,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-10 01:46:25,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-10 01:46:25,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-10 01:46:25,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-10 01:46:25,253 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-10 01:46:25,254 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-10 01:46:25,254 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 [2019-09-10 01:46:25,281 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 01:46:25,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 01:46:25,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 01:46:25,282 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 01:46:25,284 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 01:46:25,284 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 01:46:25,284 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 01:46:25,284 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 01:46:25,285 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 01:46:25,285 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 01:46:25,286 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 01:46:25,286 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 01:46:25,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 01:46:25,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 01:46:25,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 01:46:25,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 01:46:25,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 01:46:25,288 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 01:46:25,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 01:46:25,288 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 01:46:25,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 01:46:25,289 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 01:46:25,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 01:46:25,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 01:46:25,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 01:46:25,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 01:46:25,290 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 01:46:25,290 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 01:46:25,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 01:46:25,291 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 01:46:25,321 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 01:46:25,335 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 01:46:25,339 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 01:46:25,341 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 01:46:25,341 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 01:46:25,342 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test23-2.c [2019-09-10 01:46:25,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/519bf06a7/7af27bb24ab64833ba30142750f6fe03/FLAGeb1eaf26e [2019-09-10 01:46:25,903 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 01:46:25,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test23-2.c [2019-09-10 01:46:25,911 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/519bf06a7/7af27bb24ab64833ba30142750f6fe03/FLAGeb1eaf26e [2019-09-10 01:46:26,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/519bf06a7/7af27bb24ab64833ba30142750f6fe03 [2019-09-10 01:46:26,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 01:46:26,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 01:46:26,325 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 01:46:26,325 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 01:46:26,329 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 01:46:26,330 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:46:26" (1/1) ... [2019-09-10 01:46:26,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69973103 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:26, skipping insertion in model container [2019-09-10 01:46:26,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 01:46:26" (1/1) ... [2019-09-10 01:46:26,342 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 01:46:26,357 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 01:46:26,563 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:46:26,579 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 01:46:26,688 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 01:46:26,712 INFO L192 MainTranslator]: Completed translation [2019-09-10 01:46:26,712 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:26 WrapperNode [2019-09-10 01:46:26,712 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 01:46:26,713 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 01:46:26,713 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 01:46:26,713 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 01:46:26,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:26" (1/1) ... [2019-09-10 01:46:26,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:26" (1/1) ... [2019-09-10 01:46:26,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:26" (1/1) ... [2019-09-10 01:46:26,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:26" (1/1) ... [2019-09-10 01:46:26,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:26" (1/1) ... [2019-09-10 01:46:26,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:26" (1/1) ... [2019-09-10 01:46:26,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:26" (1/1) ... [2019-09-10 01:46:26,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 01:46:26,756 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 01:46:26,756 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 01:46:26,756 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 01:46:26,757 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:26" (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 [2019-09-10 01:46:26,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 01:46:26,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 01:46:26,810 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2019-09-10 01:46:26,810 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2019-09-10 01:46:26,810 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-09-10 01:46:26,810 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 01:46:26,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 01:46:26,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 01:46:26,811 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2019-09-10 01:46:26,811 INFO L130 BoogieDeclarations]: Found specification of procedure init [2019-09-10 01:46:26,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-10 01:46:26,812 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2019-09-10 01:46:26,812 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-09-10 01:46:26,812 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-10 01:46:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 01:46:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 01:46:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-10 01:46:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-09-10 01:46:26,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 01:46:26,814 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-10 01:46:27,152 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 01:46:27,153 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-10 01:46:27,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:46:27 BoogieIcfgContainer [2019-09-10 01:46:27,154 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 01:46:27,155 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 01:46:27,155 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 01:46:27,158 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 01:46:27,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 01:46:26" (1/3) ... [2019-09-10 01:46:27,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eddc305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:46:27, skipping insertion in model container [2019-09-10 01:46:27,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 01:46:26" (2/3) ... [2019-09-10 01:46:27,160 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eddc305 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 01:46:27, skipping insertion in model container [2019-09-10 01:46:27,160 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 01:46:27" (3/3) ... [2019-09-10 01:46:27,162 INFO L109 eAbstractionObserver]: Analyzing ICFG test23-2.c [2019-09-10 01:46:27,172 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 01:46:27,180 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 01:46:27,197 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 01:46:27,224 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 01:46:27,224 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 01:46:27,224 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 01:46:27,225 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 01:46:27,225 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 01:46:27,225 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 01:46:27,225 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 01:46:27,225 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 01:46:27,241 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-09-10 01:46:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-09-10 01:46:27,249 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:46:27,250 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 01:46:27,252 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:46:27,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:46:27,257 INFO L82 PathProgramCache]: Analyzing trace with hash -128514638, now seen corresponding path program 1 times [2019-09-10 01:46:27,259 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:46:27,314 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:27,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:46:27,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:27,315 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:46:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:46:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-10 01:46:27,503 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 01:46:27,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-10 01:46:27,504 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:46:27,509 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 01:46:27,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 01:46:27,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:46:27,525 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-09-10 01:46:27,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:46:27,545 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-09-10 01:46:27,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 01:46:27,547 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2019-09-10 01:46:27,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:46:27,556 INFO L225 Difference]: With dead ends: 33 [2019-09-10 01:46:27,556 INFO L226 Difference]: Without dead ends: 28 [2019-09-10 01:46:27,558 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 [2019-09-10 01:46:27,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-10 01:46:27,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-09-10 01:46:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-10 01:46:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-09-10 01:46:27,601 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 30 [2019-09-10 01:46:27,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:46:27,603 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-09-10 01:46:27,604 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 01:46:27,604 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-09-10 01:46:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-10 01:46:27,606 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 01:46:27,606 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 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] [2019-09-10 01:46:27,607 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 01:46:27,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:46:27,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1246729484, now seen corresponding path program 1 times [2019-09-10 01:46:27,607 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 01:46:27,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:27,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 01:46:27,609 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 01:46:27,610 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 01:46:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 01:46:28,902 WARN L188 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 86 [2019-09-10 01:46:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 01:46:29,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 01:46:29,003 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 01:46:29,004 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 32 with the following transitions: [2019-09-10 01:46:29,007 INFO L207 CegarAbsIntRunner]: [0], [1], [4], [6], [9], [14], [17], [24], [27], [34], [37], [38], [39], [40], [43], [47], [48], [52], [53], [54], [55], [56], [57], [58], [59], [60], [61], [62] [2019-09-10 01:46:29,049 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 01:46:29,049 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 01:46:29,138 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-10 01:46:29,139 INFO L272 AbstractInterpreter]: Visited 2 different actions 2 times. Never merged. Never widened. Performed 13 root evaluator evaluations with a maximum evaluation depth of 0. Performed 13 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 20 variables. [2019-09-10 01:46:29,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 01:46:29,142 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-10 01:46:29,176 INFO L219 lantSequenceWeakener]: Could never weaken! [2019-09-10 01:46:29,176 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-10 01:46:29,178 INFO L420 sIntCurrentIteration]: We unified 30 AI predicates to 30 [2019-09-10 01:46:29,178 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-10 01:46:29,179 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-10 01:46:29,179 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [14] total 14 [2019-09-10 01:46:29,180 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 01:46:29,181 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-10 01:46:29,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-10 01:46:29,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:46:29,182 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 2 states. [2019-09-10 01:46:29,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 01:46:29,182 INFO L93 Difference]: Finished difference Result 2 states and 1 transitions. [2019-09-10 01:46:29,182 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-10 01:46:29,183 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 31 [2019-09-10 01:46:29,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 01:46:29,183 INFO L225 Difference]: With dead ends: 2 [2019-09-10 01:46:29,183 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 01:46:29,184 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-10 01:46:29,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 01:46:29,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 01:46:29,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 01:46:29,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 01:46:29,185 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2019-09-10 01:46:29,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 01:46:29,185 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 01:46:29,185 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-10 01:46:29,185 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 01:46:29,186 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 01:46:29,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 01:46:29 BoogieIcfgContainer [2019-09-10 01:46:29,191 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 01:46:29,193 INFO L168 Benchmark]: Toolchain (without parser) took 2868.88 ms. Allocated memory was 135.3 MB in the beginning and 229.6 MB in the end (delta: 94.4 MB). Free memory was 91.1 MB in the beginning and 128.7 MB in the end (delta: -37.6 MB). Peak memory consumption was 56.8 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:29,195 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 135.3 MB. Free memory was 109.8 MB in the beginning and 109.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 01:46:29,197 INFO L168 Benchmark]: CACSL2BoogieTranslator took 387.72 ms. Allocated memory was 135.3 MB in the beginning and 200.8 MB in the end (delta: 65.5 MB). Free memory was 90.9 MB in the beginning and 176.4 MB in the end (delta: -85.5 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:29,198 INFO L168 Benchmark]: Boogie Preprocessor took 42.54 ms. Allocated memory is still 200.8 MB. Free memory was 176.4 MB in the beginning and 174.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:29,200 INFO L168 Benchmark]: RCFGBuilder took 398.33 ms. Allocated memory is still 200.8 MB. Free memory was 174.6 MB in the beginning and 156.5 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:29,201 INFO L168 Benchmark]: TraceAbstraction took 2035.55 ms. Allocated memory was 200.8 MB in the beginning and 229.6 MB in the end (delta: 28.8 MB). Free memory was 156.0 MB in the beginning and 128.7 MB in the end (delta: 27.3 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. [2019-09-10 01:46:29,209 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 135.3 MB. Free memory was 109.8 MB in the beginning and 109.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 387.72 ms. Allocated memory was 135.3 MB in the beginning and 200.8 MB in the end (delta: 65.5 MB). Free memory was 90.9 MB in the beginning and 176.4 MB in the end (delta: -85.5 MB). Peak memory consumption was 25.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.54 ms. Allocated memory is still 200.8 MB. Free memory was 176.4 MB in the beginning and 174.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 398.33 ms. Allocated memory is still 200.8 MB. Free memory was 174.6 MB in the beginning and 156.5 MB in the end (delta: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2035.55 ms. Allocated memory was 200.8 MB in the beginning and 229.6 MB in the end (delta: 28.8 MB). Free memory was 156.0 MB in the beginning and 128.7 MB in the end (delta: 27.3 MB). Peak memory consumption was 56.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 50]: 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 6 procedures, 33 locations, 1 error locations. SAFE Result, 1.9s OverallTime, 2 OverallIterations, 2 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 37 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred 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, 1.0 AbsIntWeakeningRatio, 1.2666666666666666 AbsIntAvgWeakeningVarsNumRemoved, 0.0 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 59 ConstructedInterpolants, 0 QuantifiedInterpolants, 11521 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 5/8 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...