/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 --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -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-adbd35c [2020-10-14 23:28:44,637 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 23:28:44,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 23:28:44,663 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 23:28:44,664 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 23:28:44,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 23:28:44,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 23:28:44,668 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 23:28:44,670 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 23:28:44,671 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 23:28:44,672 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 23:28:44,673 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 23:28:44,673 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 23:28:44,674 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 23:28:44,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 23:28:44,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 23:28:44,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 23:28:44,678 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 23:28:44,680 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 23:28:44,682 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 23:28:44,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 23:28:44,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 23:28:44,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 23:28:44,686 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 23:28:44,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 23:28:44,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 23:28:44,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 23:28:44,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 23:28:44,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 23:28:44,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 23:28:44,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 23:28:44,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 23:28:44,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 23:28:44,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 23:28:44,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 23:28:44,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 23:28:44,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 23:28:44,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 23:28:44,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 23:28:44,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 23:28:44,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 23:28:44,699 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 [2020-10-14 23:28:44,724 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 23:28:44,724 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 23:28:44,726 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 23:28:44,726 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 23:28:44,726 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 23:28:44,726 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 23:28:44,727 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 23:28:44,727 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 23:28:44,727 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 23:28:44,727 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 23:28:44,727 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 23:28:44,727 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 23:28:44,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 23:28:44,728 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 23:28:44,728 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 23:28:44,728 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 23:28:44,728 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 23:28:44,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 23:28:44,729 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 23:28:44,729 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 23:28:44,729 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 23:28:44,729 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 23:28:44,730 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 23:28:44,730 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 23:28:44,730 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 23:28:44,730 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 23:28:44,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 23:28:44,731 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 23:28:44,731 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 23:28:44,731 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.rcfgbuilder: Size of a code block -> SequenceOfStatements 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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-14 23:28:45,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 23:28:45,074 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 23:28:45,078 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 23:28:45,080 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 23:28:45,080 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 23:28:45,081 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/alias_of_return.c_1.i [2020-10-14 23:28:45,154 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f00e6271/7e3f4d784224462b9f928fe6c8fa1e71/FLAGfd09221ae [2020-10-14 23:28:45,539 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 23:28:45,540 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/alias_of_return.c_1.i [2020-10-14 23:28:45,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f00e6271/7e3f4d784224462b9f928fe6c8fa1e71/FLAGfd09221ae [2020-10-14 23:28:45,977 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4f00e6271/7e3f4d784224462b9f928fe6c8fa1e71 [2020-10-14 23:28:45,985 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 23:28:45,987 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 23:28:45,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 23:28:45,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 23:28:45,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 23:28:45,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:28:45" (1/1) ... [2020-10-14 23:28:45,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191a9bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:28:45, skipping insertion in model container [2020-10-14 23:28:45,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:28:45" (1/1) ... [2020-10-14 23:28:46,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 23:28:46,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 23:28:46,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:28:46,196 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 23:28:46,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 23:28:46,228 INFO L208 MainTranslator]: Completed translation [2020-10-14 23:28:46,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:28:46 WrapperNode [2020-10-14 23:28:46,229 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 23:28:46,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 23:28:46,230 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 23:28:46,230 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 23:28:46,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:28:46" (1/1) ... [2020-10-14 23:28:46,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:28:46" (1/1) ... [2020-10-14 23:28:46,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:28:46" (1/1) ... [2020-10-14 23:28:46,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:28:46" (1/1) ... [2020-10-14 23:28:46,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:28:46" (1/1) ... [2020-10-14 23:28:46,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:28:46" (1/1) ... [2020-10-14 23:28:46,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:28:46" (1/1) ... [2020-10-14 23:28:46,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 23:28:46,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 23:28:46,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 23:28:46,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 23:28:46,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:28:46" (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 [2020-10-14 23:28:46,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 23:28:46,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 23:28:46,430 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-10-14 23:28:46,431 INFO L138 BoogieDeclarations]: Found implementation of procedure return_self [2020-10-14 23:28:46,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 23:28:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 23:28:46,432 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-10-14 23:28:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure return_self [2020-10-14 23:28:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 23:28:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 23:28:46,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 23:28:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 23:28:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 23:28:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 23:28:46,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 23:28:46,740 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 23:28:46,741 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 23:28:46,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:28:46 BoogieIcfgContainer [2020-10-14 23:28:46,759 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 23:28:46,761 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 23:28:46,761 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 23:28:46,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 23:28:46,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:28:45" (1/3) ... [2020-10-14 23:28:46,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10fff1f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:28:46, skipping insertion in model container [2020-10-14 23:28:46,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:28:46" (2/3) ... [2020-10-14 23:28:46,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10fff1f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:28:46, skipping insertion in model container [2020-10-14 23:28:46,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:28:46" (3/3) ... [2020-10-14 23:28:46,780 INFO L109 eAbstractionObserver]: Analyzing ICFG alias_of_return.c_1.i [2020-10-14 23:28:46,793 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 23:28:46,800 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 23:28:46,816 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 23:28:46,841 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 23:28:46,842 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 23:28:46,842 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 23:28:46,842 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 23:28:46,842 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 23:28:46,842 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 23:28:46,843 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 23:28:46,843 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 23:28:46,862 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2020-10-14 23:28:46,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-14 23:28:46,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 23:28:46,870 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 23:28:46,870 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 23:28:46,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 23:28:46,879 INFO L82 PathProgramCache]: Analyzing trace with hash 489140804, now seen corresponding path program 1 times [2020-10-14 23:28:46,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 23:28:46,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605763411] [2020-10-14 23:28:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 23:28:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:47,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:47,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:47,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-14 23:28:47,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:28:47,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-14 23:28:47,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:47,142 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:47,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 23:28:47,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 23:28:47,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 23:28:47,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 23:28:47,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 23:28:47,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 23:28:47,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 23:28:47,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 23:28:47,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 23:28:47,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 23:28:47,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 23:28:47,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-14 23:28:47,222 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-14 23:28:47,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 23:28:47,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 23:28:47,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 23:28:47,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 23:28:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 23:28:47,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605763411] [2020-10-14 23:28:47,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 23:28:47,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 23:28:47,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341243417] [2020-10-14 23:28:47,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 23:28:47,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 23:28:47,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 23:28:47,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 23:28:47,255 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 4 states. [2020-10-14 23:28:47,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 23:28:47,308 INFO L93 Difference]: Finished difference Result 22 states and 21 transitions. [2020-10-14 23:28:47,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 23:28:47,310 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-10-14 23:28:47,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 23:28:47,318 INFO L225 Difference]: With dead ends: 22 [2020-10-14 23:28:47,318 INFO L226 Difference]: Without dead ends: 0 [2020-10-14 23:28:47,322 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 [2020-10-14 23:28:47,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-14 23:28:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-14 23:28:47,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-14 23:28:47,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-14 23:28:47,348 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9 [2020-10-14 23:28:47,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 23:28:47,349 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-14 23:28:47,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 23:28:47,349 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-14 23:28:47,349 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-14 23:28:47,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 23:28:47,352 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-14 23:28:47,401 INFO L268 CegarLoopResult]: For program point return_selfENTRY(lines 19 22) no Hoare annotation was computed. [2020-10-14 23:28:47,401 INFO L268 CegarLoopResult]: For program point return_selfFINAL(lines 19 22) no Hoare annotation was computed. [2020-10-14 23:28:47,402 INFO L268 CegarLoopResult]: For program point return_selfEXIT(lines 19 22) no Hoare annotation was computed. [2020-10-14 23:28:47,402 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-14 23:28:47,402 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|)) [2020-10-14 23:28:47,403 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-14 23:28:47,403 INFO L268 CegarLoopResult]: For program point errErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-10-14 23:28:47,403 INFO L268 CegarLoopResult]: For program point errEXIT(lines 15 16) no Hoare annotation was computed. [2020-10-14 23:28:47,403 INFO L271 CegarLoopResult]: At program point errENTRY(lines 15 16) the Hoare annotation is: true [2020-10-14 23:28:47,403 INFO L268 CegarLoopResult]: For program point errFINAL(lines 15 16) no Hoare annotation was computed. [2020-10-14 23:28:47,404 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-14 23:28:47,404 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-14 23:28:47,404 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-14 23:28:47,404 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-14 23:28:47,405 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 24 38) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-10-14 23:28:47,405 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 24 38) no Hoare annotation was computed. [2020-10-14 23:28:47,405 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 24 38) no Hoare annotation was computed. [2020-10-14 23:28:47,405 INFO L268 CegarLoopResult]: For program point L37(line 37) no Hoare annotation was computed. [2020-10-14 23:28:47,405 INFO L264 CegarLoopResult]: At program point L37-1(line 37) the Hoare annotation is: false [2020-10-14 23:28:47,406 INFO L268 CegarLoopResult]: For program point L37-3(line 37) no Hoare annotation was computed. [2020-10-14 23:28:47,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:28:47 BoogieIcfgContainer [2020-10-14 23:28:47,414 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 23:28:47,419 INFO L168 Benchmark]: Toolchain (without parser) took 1429.57 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 101.6 MB in the beginning and 131.7 MB in the end (delta: -30.1 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-10-14 23:28:47,421 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 119.9 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-10-14 23:28:47,423 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.47 ms. Allocated memory is still 145.8 MB. Free memory was 101.2 MB in the beginning and 91.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-10-14 23:28:47,425 INFO L168 Benchmark]: Boogie Preprocessor took 122.11 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 91.8 MB in the beginning and 180.6 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-14 23:28:47,427 INFO L168 Benchmark]: RCFGBuilder took 407.28 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 167.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-10-14 23:28:47,428 INFO L168 Benchmark]: TraceAbstraction took 653.81 ms. Allocated memory is still 201.9 MB. Free memory was 166.2 MB in the beginning and 131.7 MB in the end (delta: 34.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. [2020-10-14 23:28:47,435 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 120.3 MB in the beginning and 119.9 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 241.47 ms. Allocated memory is still 145.8 MB. Free memory was 101.2 MB in the beginning and 91.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.11 ms. Allocated memory was 145.8 MB in the beginning and 201.9 MB in the end (delta: 56.1 MB). Free memory was 91.8 MB in the beginning and 180.6 MB in the end (delta: -88.7 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 407.28 ms. Allocated memory is still 201.9 MB. Free memory was 180.6 MB in the beginning and 167.2 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 653.81 ms. Allocated memory is still 201.9 MB. Free memory was 166.2 MB in the beginning and 131.7 MB in the end (delta: 34.5 MB). Peak memory consumption was 34.5 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: 0.5s, 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, 0.2s 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...