/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=SHALLOWEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/alias_of_return_2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 20:18:50,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 20:18:50,784 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 20:18:50,823 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 20:18:50,824 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 20:18:50,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 20:18:50,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 20:18:50,839 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 20:18:50,843 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 20:18:50,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 20:18:50,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 20:18:50,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 20:18:50,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 20:18:50,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 20:18:50,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 20:18:50,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 20:18:50,856 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 20:18:50,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 20:18:50,861 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 20:18:50,869 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 20:18:50,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 20:18:50,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 20:18:50,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 20:18:50,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 20:18:50,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 20:18:50,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 20:18:50,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 20:18:50,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 20:18:50,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 20:18:50,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 20:18:50,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 20:18:50,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 20:18:50,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 20:18:50,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 20:18:50,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 20:18:50,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 20:18:50,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 20:18:50,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 20:18:50,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 20:18:50,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 20:18:50,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 20:18:50,892 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 20:18:50,932 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 20:18:50,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 20:18:50,934 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 20:18:50,934 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 20:18:50,935 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 20:18:50,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 20:18:50,935 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 20:18:50,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 20:18:50,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 20:18:50,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 20:18:50,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 20:18:50,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 20:18:50,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 20:18:50,938 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 20:18:50,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 20:18:50,938 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 20:18:50,938 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 20:18:50,938 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 20:18:50,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 20:18:50,939 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 20:18:50,939 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 20:18:50,939 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 20:18:50,939 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 20:18:50,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 20:18:50,940 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 20:18:50,940 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 20:18:50,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 20:18:50,940 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 20:18:50,940 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 20:18:50,941 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=SHALLOWEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SHALLOWEST; [2020-08-18 20:18:51,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 20:18:51,288 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 20:18:51,292 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 20:18:51,293 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 20:18:51,294 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 20:18:51,295 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/alias_of_return_2.i [2020-08-18 20:18:51,360 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/159f771b6/2bac80fe8b854a9caf2d51f4ae0e672e/FLAG5a4eb77ec [2020-08-18 20:18:51,822 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 20:18:51,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/alias_of_return_2.i [2020-08-18 20:18:51,828 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/159f771b6/2bac80fe8b854a9caf2d51f4ae0e672e/FLAG5a4eb77ec [2020-08-18 20:18:52,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/159f771b6/2bac80fe8b854a9caf2d51f4ae0e672e [2020-08-18 20:18:52,197 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 20:18:52,199 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 20:18:52,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 20:18:52,201 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 20:18:52,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 20:18:52,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:18:52" (1/1) ... [2020-08-18 20:18:52,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@637cd42e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:52, skipping insertion in model container [2020-08-18 20:18:52,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 08:18:52" (1/1) ... [2020-08-18 20:18:52,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 20:18:52,236 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 20:18:52,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:18:52,419 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 20:18:52,436 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 20:18:52,452 INFO L208 MainTranslator]: Completed translation [2020-08-18 20:18:52,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:52 WrapperNode [2020-08-18 20:18:52,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 20:18:52,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 20:18:52,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 20:18:52,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 20:18:52,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:52" (1/1) ... [2020-08-18 20:18:52,466 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:52" (1/1) ... [2020-08-18 20:18:52,473 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:52" (1/1) ... [2020-08-18 20:18:52,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:52" (1/1) ... [2020-08-18 20:18:52,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:52" (1/1) ... [2020-08-18 20:18:52,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:52" (1/1) ... [2020-08-18 20:18:52,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:52" (1/1) ... [2020-08-18 20:18:52,484 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 20:18:52,485 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 20:18:52,485 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 20:18:52,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 20:18:52,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:52" (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 20:18:52,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 20:18:52,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 20:18:52,629 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-08-18 20:18:52,629 INFO L138 BoogieDeclarations]: Found implementation of procedure return_self [2020-08-18 20:18:52,629 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 20:18:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 20:18:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-08-18 20:18:52,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 20:18:52,630 INFO L130 BoogieDeclarations]: Found specification of procedure return_self [2020-08-18 20:18:52,630 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 20:18:52,630 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 20:18:52,630 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 20:18:52,630 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 20:18:52,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 20:18:52,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 20:18:52,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 20:18:52,887 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 20:18:52,888 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 20:18:52,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:18:52 BoogieIcfgContainer [2020-08-18 20:18:52,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 20:18:52,905 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 20:18:52,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 20:18:52,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 20:18:52,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 08:18:52" (1/3) ... [2020-08-18 20:18:52,918 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1fe542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:18:52, skipping insertion in model container [2020-08-18 20:18:52,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 08:18:52" (2/3) ... [2020-08-18 20:18:52,919 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a1fe542 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 08:18:52, skipping insertion in model container [2020-08-18 20:18:52,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 08:18:52" (3/3) ... [2020-08-18 20:18:52,925 INFO L109 eAbstractionObserver]: Analyzing ICFG alias_of_return_2.i [2020-08-18 20:18:52,954 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 20:18:52,971 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 20:18:53,001 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 20:18:53,029 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 20:18:53,030 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 20:18:53,030 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 20:18:53,030 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 20:18:53,030 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 20:18:53,030 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 20:18:53,030 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 20:18:53,030 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 20:18:53,050 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-08-18 20:18:53,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 20:18:53,055 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 20:18:53,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 20:18:53,057 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 20:18:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 20:18:53,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1348671059, now seen corresponding path program 1 times [2020-08-18 20:18:53,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 20:18:53,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339533933] [2020-08-18 20:18:53,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 20:18:53,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:53,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 20:18:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:53,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 20:18:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 20:18:53,383 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 20:18:53,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339533933] [2020-08-18 20:18:53,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 20:18:53,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 20:18:53,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605622494] [2020-08-18 20:18:53,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 20:18:53,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 20:18:53,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 20:18:53,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 20:18:53,407 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 7 states. [2020-08-18 20:18:53,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 20:18:53,548 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-08-18 20:18:53,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 20:18:53,550 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-08-18 20:18:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 20:18:53,559 INFO L225 Difference]: With dead ends: 28 [2020-08-18 20:18:53,559 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 20:18:53,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-18 20:18:53,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 20:18:53,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 20:18:53,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 20:18:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 20:18:53,593 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-08-18 20:18:53,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 20:18:53,593 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 20:18:53,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 20:18:53,594 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 20:18:53,594 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 20:18:53,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 20:18:53,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 20:18:53,646 INFO L271 CegarLoopResult]: At program point return_selfENTRY(lines 12 19) the Hoare annotation is: true [2020-08-18 20:18:53,646 INFO L268 CegarLoopResult]: For program point L14(lines 14 18) no Hoare annotation was computed. [2020-08-18 20:18:53,646 INFO L268 CegarLoopResult]: For program point return_selfFINAL(lines 12 19) no Hoare annotation was computed. [2020-08-18 20:18:53,646 INFO L268 CegarLoopResult]: For program point return_selfEXIT(lines 12 19) no Hoare annotation was computed. [2020-08-18 20:18:53,647 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 20:18:53,647 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 20:18:53,647 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:18:53,648 INFO L268 CegarLoopResult]: For program point errErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 20:18:53,648 INFO L268 CegarLoopResult]: For program point errEXIT(lines 7 8) no Hoare annotation was computed. [2020-08-18 20:18:53,648 INFO L271 CegarLoopResult]: At program point errENTRY(lines 7 8) the Hoare annotation is: true [2020-08-18 20:18:53,648 INFO L268 CegarLoopResult]: For program point errFINAL(lines 7 8) no Hoare annotation was computed. [2020-08-18 20:18:53,648 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 20:18:53,649 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 20:18:53,649 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 20:18:53,649 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 20:18:53,649 INFO L264 CegarLoopResult]: At program point L34-1(line 34) the Hoare annotation is: false [2020-08-18 20:18:53,649 INFO L268 CegarLoopResult]: For program point L34-3(line 34) no Hoare annotation was computed. [2020-08-18 20:18:53,650 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 21 35) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-18 20:18:53,650 INFO L271 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: true [2020-08-18 20:18:53,650 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 21 35) no Hoare annotation was computed. [2020-08-18 20:18:53,650 INFO L268 CegarLoopResult]: For program point L29-1(line 29) no Hoare annotation was computed. [2020-08-18 20:18:53,650 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 35) no Hoare annotation was computed. [2020-08-18 20:18:53,651 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed. [2020-08-18 20:18:53,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 08:18:53 BoogieIcfgContainer [2020-08-18 20:18:53,657 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 20:18:53,660 INFO L168 Benchmark]: Toolchain (without parser) took 1460.18 ms. Allocated memory was 140.5 MB in the beginning and 201.3 MB in the end (delta: 60.8 MB). Free memory was 104.3 MB in the beginning and 123.2 MB in the end (delta: -18.9 MB). Peak memory consumption was 41.9 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:53,661 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 20:18:53,662 INFO L168 Benchmark]: CACSL2BoogieTranslator took 253.02 ms. Allocated memory is still 140.5 MB. Free memory was 104.1 MB in the beginning and 94.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:53,663 INFO L168 Benchmark]: Boogie Preprocessor took 30.47 ms. Allocated memory is still 140.5 MB. Free memory was 94.4 MB in the beginning and 93.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:53,665 INFO L168 Benchmark]: RCFGBuilder took 407.54 ms. Allocated memory was 140.5 MB in the beginning and 201.3 MB in the end (delta: 60.8 MB). Free memory was 92.8 MB in the beginning and 167.2 MB in the end (delta: -74.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:53,666 INFO L168 Benchmark]: TraceAbstraction took 751.88 ms. Allocated memory is still 201.3 MB. Free memory was 166.5 MB in the beginning and 123.2 MB in the end (delta: 43.3 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB. [2020-08-18 20:18:53,670 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 253.02 ms. Allocated memory is still 140.5 MB. Free memory was 104.1 MB in the beginning and 94.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.47 ms. Allocated memory is still 140.5 MB. Free memory was 94.4 MB in the beginning and 93.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 407.54 ms. Allocated memory was 140.5 MB in the beginning and 201.3 MB in the end (delta: 60.8 MB). Free memory was 92.8 MB in the beginning and 167.2 MB in the end (delta: -74.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 751.88 ms. Allocated memory is still 201.3 MB. Free memory was 166.5 MB in the beginning and 123.2 MB in the end (delta: 43.3 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 7 SDslu, 37 SDs, 0 SdLazy, 44 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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, 8 LocationsWithAnnotation, 8 PreInvPairs, 8 NumberOfFragments, 19 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 16 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 686 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...