/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/alias_of_return.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:17:22,860 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:17:22,863 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:17:22,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:17:22,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:17:22,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:17:22,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:17:22,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:17:22,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:17:22,893 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:17:22,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:17:22,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:17:22,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:17:22,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:17:22,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:17:22,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:17:22,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:17:22,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:17:22,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:17:22,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:17:22,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:17:22,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:17:22,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:17:22,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:17:22,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:17:22,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:17:22,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:17:22,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:17:22,927 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 16:17:22,978 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:17:22,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:17:22,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:17:22,985 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:17:22,985 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:17:22,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:17:22,985 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:17:22,986 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:17:22,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:17:22,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:17:22,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:17:22,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:17:22,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:17:22,987 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:17:22,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:17:22,987 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:17:22,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:17:22,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:17:22,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:17:22,988 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:17:22,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:17:22,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:17:22,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:17:22,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:17:22,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:17:22,990 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:17:22,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:17:22,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:17:22,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:17:22,991 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 [2020-08-18 16:17:23,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:17:23,323 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:17:23,326 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:17:23,328 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:17:23,328 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:17:23,329 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/alias_of_return.i [2020-08-18 16:17:23,399 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f4c5a49d/36d813e687fb471bbbd67c3b5deaf188/FLAGb2eeda1d7 [2020-08-18 16:17:23,876 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:17:23,877 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/alias_of_return.i [2020-08-18 16:17:23,884 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f4c5a49d/36d813e687fb471bbbd67c3b5deaf188/FLAGb2eeda1d7 [2020-08-18 16:17:24,250 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1f4c5a49d/36d813e687fb471bbbd67c3b5deaf188 [2020-08-18 16:17:24,261 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:17:24,263 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:17:24,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:24,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:17:24,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:17:24,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:24" (1/1) ... [2020-08-18 16:17:24,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25b4d004 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:24, skipping insertion in model container [2020-08-18 16:17:24,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:24" (1/1) ... [2020-08-18 16:17:24,283 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:17:24,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:17:24,499 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:24,509 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:17:24,522 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:24,540 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:17:24,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:24 WrapperNode [2020-08-18 16:17:24,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:24,541 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:17:24,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:17:24,542 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:17:24,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:24" (1/1) ... [2020-08-18 16:17:24,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:24" (1/1) ... [2020-08-18 16:17:24,643 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:24" (1/1) ... [2020-08-18 16:17:24,644 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:24" (1/1) ... [2020-08-18 16:17:24,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:24" (1/1) ... [2020-08-18 16:17:24,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:24" (1/1) ... [2020-08-18 16:17:24,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:24" (1/1) ... [2020-08-18 16:17:24,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:17:24,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:17:24,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:17:24,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:17:24,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:24" (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 16:17:24,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:17:24,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:17:24,710 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-08-18 16:17:24,710 INFO L138 BoogieDeclarations]: Found implementation of procedure return_self [2020-08-18 16:17:24,711 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:17:24,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:17:24,712 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-08-18 16:17:24,713 INFO L130 BoogieDeclarations]: Found specification of procedure return_self [2020-08-18 16:17:24,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:17:24,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 16:17:24,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 16:17:24,713 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 16:17:24,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 16:17:24,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:17:24,714 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:17:24,894 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:17:24,895 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 16:17:24,900 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:24 BoogieIcfgContainer [2020-08-18 16:17:24,900 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:17:24,902 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:17:24,902 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:17:24,905 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:17:24,905 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:17:24" (1/3) ... [2020-08-18 16:17:24,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2462d735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:24, skipping insertion in model container [2020-08-18 16:17:24,906 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:24" (2/3) ... [2020-08-18 16:17:24,907 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2462d735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:24, skipping insertion in model container [2020-08-18 16:17:24,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:24" (3/3) ... [2020-08-18 16:17:24,909 INFO L109 eAbstractionObserver]: Analyzing ICFG alias_of_return.i [2020-08-18 16:17:24,925 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:17:24,933 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:17:24,951 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:17:24,980 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:17:24,980 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:17:24,981 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:17:24,981 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:17:24,981 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:17:24,981 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:17:24,981 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:17:24,981 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:17:25,003 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-08-18 16:17:25,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 16:17:25,009 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:25,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:25,010 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:25,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:25,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1496730974, now seen corresponding path program 1 times [2020-08-18 16:17:25,026 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:25,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085676866] [2020-08-18 16:17:25,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:25,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:25,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:25,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:25,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 16:17:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:25,356 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 16:17:25,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085676866] [2020-08-18 16:17:25,359 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:25,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 16:17:25,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639167701] [2020-08-18 16:17:25,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 16:17:25,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:25,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 16:17:25,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 16:17:25,388 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 6 states. [2020-08-18 16:17:25,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:25,500 INFO L93 Difference]: Finished difference Result 27 states and 26 transitions. [2020-08-18 16:17:25,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 16:17:25,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-08-18 16:17:25,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:25,513 INFO L225 Difference]: With dead ends: 27 [2020-08-18 16:17:25,513 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 16:17:25,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-08-18 16:17:25,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 16:17:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 16:17:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 16:17:25,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 16:17:25,548 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-08-18 16:17:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:25,548 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 16:17:25,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 16:17:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 16:17:25,549 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 16:17:25,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:17:25,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 16:17:25,608 INFO L271 CegarLoopResult]: At program point return_selfENTRY(lines 11 14) the Hoare annotation is: true [2020-08-18 16:17:25,609 INFO L268 CegarLoopResult]: For program point return_selfFINAL(lines 11 14) no Hoare annotation was computed. [2020-08-18 16:17:25,609 INFO L268 CegarLoopResult]: For program point return_selfEXIT(lines 11 14) no Hoare annotation was computed. [2020-08-18 16:17:25,609 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 16:17:25,610 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 16:17:25,610 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:17:25,610 INFO L268 CegarLoopResult]: For program point errErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 16:17:25,611 INFO L268 CegarLoopResult]: For program point errEXIT(lines 7 8) no Hoare annotation was computed. [2020-08-18 16:17:25,611 INFO L271 CegarLoopResult]: At program point errENTRY(lines 7 8) the Hoare annotation is: true [2020-08-18 16:17:25,611 INFO L268 CegarLoopResult]: For program point errFINAL(lines 7 8) no Hoare annotation was computed. [2020-08-18 16:17:25,611 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:17:25,612 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 16:17:25,612 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 16:17:25,612 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 16:17:25,614 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 30) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-18 16:17:25,614 INFO L268 CegarLoopResult]: For program point L29(line 29) no Hoare annotation was computed. [2020-08-18 16:17:25,614 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 30) no Hoare annotation was computed. [2020-08-18 16:17:25,615 INFO L264 CegarLoopResult]: At program point L29-1(line 29) the Hoare annotation is: false [2020-08-18 16:17:25,615 INFO L268 CegarLoopResult]: For program point L29-3(line 29) no Hoare annotation was computed. [2020-08-18 16:17:25,615 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 30) no Hoare annotation was computed. [2020-08-18 16:17:25,615 INFO L271 CegarLoopResult]: At program point L24(line 24) the Hoare annotation is: true [2020-08-18 16:17:25,616 INFO L268 CegarLoopResult]: For program point L24-1(line 24) no Hoare annotation was computed. [2020-08-18 16:17:25,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:17:25 BoogieIcfgContainer [2020-08-18 16:17:25,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:17:25,626 INFO L168 Benchmark]: Toolchain (without parser) took 1361.85 ms. Allocated memory was 142.1 MB in the beginning and 203.9 MB in the end (delta: 61.9 MB). Free memory was 104.2 MB in the beginning and 131.7 MB in the end (delta: -27.5 MB). Peak memory consumption was 34.3 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:25,627 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 142.1 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 16:17:25,628 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.50 ms. Allocated memory is still 142.1 MB. Free memory was 104.0 MB in the beginning and 94.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:25,629 INFO L168 Benchmark]: Boogie Preprocessor took 113.64 ms. Allocated memory was 142.1 MB in the beginning and 203.9 MB in the end (delta: 61.9 MB). Free memory was 94.4 MB in the beginning and 182.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:25,630 INFO L168 Benchmark]: RCFGBuilder took 245.00 ms. Allocated memory is still 203.9 MB. Free memory was 182.5 MB in the beginning and 169.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:25,631 INFO L168 Benchmark]: TraceAbstraction took 721.06 ms. Allocated memory is still 203.9 MB. Free memory was 169.4 MB in the beginning and 131.7 MB in the end (delta: 37.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:25,635 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 142.1 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.50 ms. Allocated memory is still 142.1 MB. Free memory was 104.0 MB in the beginning and 94.6 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.64 ms. Allocated memory was 142.1 MB in the beginning and 203.9 MB in the end (delta: 61.9 MB). Free memory was 94.4 MB in the beginning and 182.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 245.00 ms. Allocated memory is still 203.9 MB. Free memory was 182.5 MB in the beginning and 169.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 721.06 ms. Allocated memory is still 203.9 MB. Free memory was 169.4 MB in the beginning and 131.7 MB in the end (delta: 37.7 MB). Peak memory consumption was 37.7 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, 22 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, 2 SDslu, 29 SDs, 0 SdLazy, 31 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 546 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...