/usr/bin/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/alias_of_return.c_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:53:57,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:53:57,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:53:57,202 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:53:57,202 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:53:57,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:53:57,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:53:57,207 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:53:57,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:53:57,209 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:53:57,210 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:53:57,211 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:53:57,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:53:57,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:53:57,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:53:57,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:53:57,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:53:57,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:53:57,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:53:57,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:53:57,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:53:57,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:53:57,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:53:57,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:53:57,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 17:53:57,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:53:57,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:53:57,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:53:57,237 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 17:53:57,263 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:53:57,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:53:57,265 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:53:57,265 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:53:57,265 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:53:57,266 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:53:57,267 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:53:57,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:53:57,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:53:57,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:53:57,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:53:57,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:53:57,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:53:57,268 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:53:57,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:53:57,270 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:53:57,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:53:57,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:53:57,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:53:57,271 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:53:57,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:53:57,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:53:57,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:53:57,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:53:57,273 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:53:57,273 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:53:57,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:53:57,273 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:53:57,273 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:53:57,274 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=BIGGEST; [2020-08-18 17:53:57,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:53:57,652 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:53:57,656 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:53:57,657 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:53:57,658 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:53:57,658 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/alias_of_return.c_1.i [2020-08-18 17:53:57,717 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42a97fd92/2448befc7cb34202aa53f93f4e538f65/FLAG4b214c13d [2020-08-18 17:53:58,093 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:53:58,096 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/alias_of_return.c_1.i [2020-08-18 17:53:58,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42a97fd92/2448befc7cb34202aa53f93f4e538f65/FLAG4b214c13d [2020-08-18 17:53:58,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/42a97fd92/2448befc7cb34202aa53f93f4e538f65 [2020-08-18 17:53:58,489 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:53:58,491 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:53:58,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:53:58,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:53:58,501 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:53:58,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:53:58" (1/1) ... [2020-08-18 17:53:58,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@176fd554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:58, skipping insertion in model container [2020-08-18 17:53:58,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:53:58" (1/1) ... [2020-08-18 17:53:58,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:53:58,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:53:58,709 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:53:58,721 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:53:58,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:53:58,754 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:53:58,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:58 WrapperNode [2020-08-18 17:53:58,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:53:58,756 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:53:58,756 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:53:58,756 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:53:58,769 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:58" (1/1) ... [2020-08-18 17:53:58,769 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:58" (1/1) ... [2020-08-18 17:53:58,776 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:58" (1/1) ... [2020-08-18 17:53:58,776 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:58" (1/1) ... [2020-08-18 17:53:58,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:58" (1/1) ... [2020-08-18 17:53:58,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:58" (1/1) ... [2020-08-18 17:53:58,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:58" (1/1) ... [2020-08-18 17:53:58,785 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:53:58,786 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:53:58,786 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:53:58,786 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:53:58,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 17:53:58,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:53:58,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:53:58,932 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-08-18 17:53:58,932 INFO L138 BoogieDeclarations]: Found implementation of procedure return_self [2020-08-18 17:53:58,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:53:58,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:53:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-08-18 17:53:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure return_self [2020-08-18 17:53:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:53:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 17:53:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:53:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:53:58,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:53:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:53:58,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:53:59,148 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:53:59,149 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 17:53:59,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:53:59 BoogieIcfgContainer [2020-08-18 17:53:59,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:53:59,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:53:59,168 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:53:59,178 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:53:59,179 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:53:58" (1/3) ... [2020-08-18 17:53:59,180 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6276b7d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:53:59, skipping insertion in model container [2020-08-18 17:53:59,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:53:58" (2/3) ... [2020-08-18 17:53:59,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6276b7d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:53:59, skipping insertion in model container [2020-08-18 17:53:59,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:53:59" (3/3) ... [2020-08-18 17:53:59,184 INFO L109 eAbstractionObserver]: Analyzing ICFG alias_of_return.c_1.i [2020-08-18 17:53:59,197 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:53:59,219 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:53:59,233 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:53:59,263 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:53:59,264 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:53:59,264 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:53:59,264 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:53:59,264 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:53:59,264 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:53:59,264 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:53:59,265 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:53:59,284 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-08-18 17:53:59,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-08-18 17:53:59,294 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:53:59,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:53:59,296 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:53:59,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:53:59,302 INFO L82 PathProgramCache]: Analyzing trace with hash 489140804, now seen corresponding path program 1 times [2020-08-18 17:53:59,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:53:59,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936885652] [2020-08-18 17:53:59,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:53:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:59,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:53:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:53:59,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:53:59,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936885652] [2020-08-18 17:53:59,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:53:59,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:53:59,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989085976] [2020-08-18 17:53:59,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:53:59,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:53:59,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:53:59,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:53:59,540 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 4 states. [2020-08-18 17:53:59,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:53:59,600 INFO L93 Difference]: Finished difference Result 22 states and 21 transitions. [2020-08-18 17:53:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:53:59,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-08-18 17:53:59,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:53:59,608 INFO L225 Difference]: With dead ends: 22 [2020-08-18 17:53:59,608 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 17:53:59,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:53:59,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 17:53:59,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 17:53:59,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 17:53:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 17:53:59,635 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2020-08-18 17:53:59,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:53:59,636 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 17:53:59,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:53:59,636 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 17:53:59,636 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 17:53:59,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:53:59,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 17:53:59,704 INFO L268 CegarLoopResult]: For program point return_selfENTRY(lines 19 22) no Hoare annotation was computed. [2020-08-18 17:53:59,705 INFO L268 CegarLoopResult]: For program point return_selfFINAL(lines 19 22) no Hoare annotation was computed. [2020-08-18 17:53:59,705 INFO L268 CegarLoopResult]: For program point return_selfEXIT(lines 19 22) no Hoare annotation was computed. [2020-08-18 17:53:59,705 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 17:53:59,705 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-18 17:53:59,705 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:53:59,706 INFO L268 CegarLoopResult]: For program point errErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-08-18 17:53:59,706 INFO L268 CegarLoopResult]: For program point errEXIT(lines 15 16) no Hoare annotation was computed. [2020-08-18 17:53:59,706 INFO L271 CegarLoopResult]: At program point errENTRY(lines 15 16) the Hoare annotation is: true [2020-08-18 17:53:59,706 INFO L268 CegarLoopResult]: For program point errFINAL(lines 15 16) no Hoare annotation was computed. [2020-08-18 17:53:59,707 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 17:53:59,707 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 17:53:59,707 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 17:53:59,707 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 17:53:59,707 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 24 38) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-18 17:53:59,707 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 24 38) no Hoare annotation was computed. [2020-08-18 17:53:59,708 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 24 38) no Hoare annotation was computed. [2020-08-18 17:53:59,708 INFO L268 CegarLoopResult]: For program point L37(line 37) no Hoare annotation was computed. [2020-08-18 17:53:59,708 INFO L264 CegarLoopResult]: At program point L37-1(line 37) the Hoare annotation is: false [2020-08-18 17:53:59,708 INFO L268 CegarLoopResult]: For program point L37-3(line 37) no Hoare annotation was computed. [2020-08-18 17:53:59,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:53:59 BoogieIcfgContainer [2020-08-18 17:53:59,714 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:53:59,717 INFO L168 Benchmark]: Toolchain (without parser) took 1225.29 ms. Allocated memory was 148.9 MB in the beginning and 203.4 MB in the end (delta: 54.5 MB). Free memory was 105.2 MB in the beginning and 141.3 MB in the end (delta: -36.1 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:59,718 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 17:53:59,719 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.86 ms. Allocated memory is still 148.9 MB. Free memory was 104.8 MB in the beginning and 95.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:59,720 INFO L168 Benchmark]: Boogie Preprocessor took 29.96 ms. Allocated memory is still 148.9 MB. Free memory was 95.3 MB in the beginning and 93.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:59,722 INFO L168 Benchmark]: RCFGBuilder took 368.92 ms. Allocated memory was 148.9 MB in the beginning and 203.4 MB in the end (delta: 54.5 MB). Free memory was 93.8 MB in the beginning and 170.0 MB in the end (delta: -76.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:59,723 INFO L168 Benchmark]: TraceAbstraction took 546.61 ms. Allocated memory is still 203.4 MB. Free memory was 169.3 MB in the beginning and 142.0 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:53:59,727 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 258.86 ms. Allocated memory is still 148.9 MB. Free memory was 104.8 MB in the beginning and 95.3 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.96 ms. Allocated memory is still 148.9 MB. Free memory was 95.3 MB in the beginning and 93.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 368.92 ms. Allocated memory was 148.9 MB in the beginning and 203.4 MB in the end (delta: 54.5 MB). Free memory was 93.8 MB in the beginning and 170.0 MB in the end (delta: -76.2 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 546.61 ms. Allocated memory is still 203.4 MB. Free memory was 169.3 MB in the beginning and 142.0 MB in the end (delta: 27.4 MB). Peak memory consumption was 27.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: 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 5 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.3s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 8 SDtfs, 0 SDslu, 12 SDs, 0 SdLazy, 10 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 6 NumberOfFragments, 17 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 152 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...