/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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 language data_model -i ../../../trunk/examples/svcomp/ldv-regression/alias_of_return.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:37:48,766 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:37:48,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:37:48,809 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:37:48,809 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:37:48,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:37:48,812 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:37:48,815 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:37:48,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:37:48,818 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:37:48,819 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:37:48,821 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:37:48,821 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:37:48,823 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:37:48,824 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:37:48,825 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:37:48,826 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:37:48,827 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:37:48,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:37:48,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:37:48,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:37:48,835 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:37:48,837 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:37:48,838 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:37:48,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:37:48,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:37:48,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:37:48,844 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:37:48,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:37:48,845 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:37:48,846 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:37:48,847 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:37:48,848 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:37:48,848 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:37:48,850 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:37:48,850 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:37:48,851 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:37:48,851 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:37:48,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:37:48,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:37:48,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:37:48,865 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 [2020-10-28 14:37:48,893 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:37:48,893 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:37:48,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:37:48,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:37:48,895 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:37:48,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:37:48,896 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:37:48,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:37:48,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:37:48,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:37:48,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:37:48,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:37:48,897 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:37:48,897 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:37:48,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:37:48,897 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:37:48,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:37:48,898 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:37:48,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:37:48,898 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:37:48,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:37:48,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:37:48,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:37:48,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:37:48,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:37:48,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:37:48,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:37:48,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:37:48,900 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:37:48,900 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:37:49,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:37:49,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:37:49,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:37:49,288 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:37:49,289 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:37:49,290 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/alias_of_return.i [2020-10-28 14:37:49,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd7987cde/5a7c96c35124481d93fbcb880df35ddb/FLAG621729a5c [2020-10-28 14:37:50,021 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:37:50,022 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/alias_of_return.i [2020-10-28 14:37:50,029 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd7987cde/5a7c96c35124481d93fbcb880df35ddb/FLAG621729a5c [2020-10-28 14:37:50,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd7987cde/5a7c96c35124481d93fbcb880df35ddb [2020-10-28 14:37:50,412 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:37:50,419 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:37:50,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:37:50,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:37:50,427 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:37:50,428 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:37:50" (1/1) ... [2020-10-28 14:37:50,432 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d6bf0bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:50, skipping insertion in model container [2020-10-28 14:37:50,432 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:37:50" (1/1) ... [2020-10-28 14:37:50,441 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:37:50,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:37:50,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:37:50,644 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:37:50,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:37:50,677 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:37:50,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:50 WrapperNode [2020-10-28 14:37:50,678 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:37:50,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:37:50,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:37:50,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:37:50,695 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:50" (1/1) ... [2020-10-28 14:37:50,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:50" (1/1) ... [2020-10-28 14:37:50,704 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:50" (1/1) ... [2020-10-28 14:37:50,705 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:50" (1/1) ... [2020-10-28 14:37:50,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:50" (1/1) ... [2020-10-28 14:37:50,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:50" (1/1) ... [2020-10-28 14:37:50,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:50" (1/1) ... [2020-10-28 14:37:50,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:37:50,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:37:50,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:37:50,719 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:37:50,720 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:50" (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 [2020-10-28 14:37:50,808 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:37:50,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:37:50,809 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:37:50,809 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-10-28 14:37:50,809 INFO L138 BoogieDeclarations]: Found implementation of procedure return_self [2020-10-28 14:37:50,809 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:37:50,810 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:37:50,810 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:37:50,810 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:37:50,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:37:50,810 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-10-28 14:37:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure return_self [2020-10-28 14:37:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:37:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:37:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:37:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:37:50,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:37:50,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:37:50,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:37:51,049 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:37:51,049 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 14:37:51,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:37:51 BoogieIcfgContainer [2020-10-28 14:37:51,052 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:37:51,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:37:51,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:37:51,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:37:51,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:37:50" (1/3) ... [2020-10-28 14:37:51,059 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc5b09d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:37:51, skipping insertion in model container [2020-10-28 14:37:51,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:37:50" (2/3) ... [2020-10-28 14:37:51,060 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cc5b09d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:37:51, skipping insertion in model container [2020-10-28 14:37:51,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:37:51" (3/3) ... [2020-10-28 14:37:51,062 INFO L111 eAbstractionObserver]: Analyzing ICFG alias_of_return.i [2020-10-28 14:37:51,083 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:37:51,097 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:37:51,148 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:37:51,183 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:37:51,184 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:37:51,184 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:37:51,184 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:37:51,184 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:37:51,184 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:37:51,184 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:37:51,185 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:37:51,208 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-28 14:37:51,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:37:51,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:37:51,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:37:51,216 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:37:51,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:37:51,225 INFO L82 PathProgramCache]: Analyzing trace with hash -385842629, now seen corresponding path program 1 times [2020-10-28 14:37:51,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:37:51,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765883842] [2020-10-28 14:37:51,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:37:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:51,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:51,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:51,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-28 14:37:51,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:51,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-28 14:37:51,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:51,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:51,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:37:51,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:37:51,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:37:51,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:37:52,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:37:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:52,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:52,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:52,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:52,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:52,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 14:37:52,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:52,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:52,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:37:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:37:52,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:37:52,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 14:37:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:37:52,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:37:52,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:37:52,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:37:52,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:37:52,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 14:37:52,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:37:52,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:37:52,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:37:52,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:37:52,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:37:52,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:37:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:37:52,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765883842] [2020-10-28 14:37:52,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:37:52,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:37:52,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589669177] [2020-10-28 14:37:52,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:37:52,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:37:52,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:37:52,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:37:52,174 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-10-28 14:37:52,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:37:52,362 INFO L93 Difference]: Finished difference Result 31 states and 30 transitions. [2020-10-28 14:37:52,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:37:52,365 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-28 14:37:52,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:37:52,383 INFO L225 Difference]: With dead ends: 31 [2020-10-28 14:37:52,383 INFO L226 Difference]: Without dead ends: 0 [2020-10-28 14:37:52,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:37:52,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-28 14:37:52,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-28 14:37:52,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-28 14:37:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-28 14:37:52,433 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2020-10-28 14:37:52,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:37:52,434 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-28 14:37:52,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:37:52,434 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-28 14:37:52,435 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-28 14:37:52,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:37:52,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-28 14:37:52,587 INFO L274 CegarLoopResult]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2020-10-28 14:37:52,588 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-28 14:37:52,588 INFO L274 CegarLoopResult]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2020-10-28 14:37:52,589 INFO L274 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-10-28 14:37:52,590 INFO L277 CegarLoopResult]: At program point return_selfENTRY(lines 13 16) the Hoare annotation is: true [2020-10-28 14:37:52,590 INFO L274 CegarLoopResult]: For program point return_selfFINAL(lines 13 16) no Hoare annotation was computed. [2020-10-28 14:37:52,590 INFO L274 CegarLoopResult]: For program point return_selfEXIT(lines 13 16) no Hoare annotation was computed. [2020-10-28 14:37:52,590 INFO L274 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:37:52,591 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-28 14:37:52,592 INFO L274 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:37:52,592 INFO L274 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-10-28 14:37:52,593 INFO L274 CegarLoopResult]: For program point errEXIT(lines 9 10) no Hoare annotation was computed. [2020-10-28 14:37:52,593 INFO L277 CegarLoopResult]: At program point errENTRY(lines 9 10) the Hoare annotation is: true [2020-10-28 14:37:52,595 INFO L274 CegarLoopResult]: For program point errFINAL(lines 9 10) no Hoare annotation was computed. [2020-10-28 14:37:52,595 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-28 14:37:52,595 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-28 14:37:52,596 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-28 14:37:52,596 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-28 14:37:52,596 INFO L274 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-10-28 14:37:52,596 INFO L270 CegarLoopResult]: At program point L31-1(line 31) the Hoare annotation is: false [2020-10-28 14:37:52,596 INFO L270 CegarLoopResult]: At program point mainENTRY(lines 18 32) the Hoare annotation is: (and (= |old(#length)| |#length|) (= |old(#valid)| |#valid|)) [2020-10-28 14:37:52,596 INFO L274 CegarLoopResult]: For program point mainFINAL(lines 18 32) no Hoare annotation was computed. [2020-10-28 14:37:52,597 INFO L274 CegarLoopResult]: For program point L31-3(line 31) no Hoare annotation was computed. [2020-10-28 14:37:52,597 INFO L277 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-10-28 14:37:52,597 INFO L274 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-10-28 14:37:52,597 INFO L274 CegarLoopResult]: For program point mainEXIT(lines 18 32) no Hoare annotation was computed. [2020-10-28 14:37:52,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 02:37:52 BoogieIcfgContainer [2020-10-28 14:37:52,608 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 14:37:52,614 INFO L168 Benchmark]: Toolchain (without parser) took 2196.75 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 114.8 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. [2020-10-28 14:37:52,616 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory is still 100.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:37:52,620 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.29 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.8 MB in the end (delta: 8.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-28 14:37:52,622 INFO L168 Benchmark]: Boogie Preprocessor took 37.65 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:37:52,624 INFO L168 Benchmark]: RCFGBuilder took 333.58 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 103.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-28 14:37:52,625 INFO L168 Benchmark]: TraceAbstraction took 1555.12 ms. Allocated memory is still 151.0 MB. Free memory was 103.2 MB in the beginning and 114.8 MB in the end (delta: -11.6 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:37:52,638 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory is still 100.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 257.29 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 117.8 MB in the end (delta: 8.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.65 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.4 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 333.58 ms. Allocated memory is still 151.0 MB. Free memory was 116.2 MB in the beginning and 103.6 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1555.12 ms. Allocated memory is still 151.0 MB. Free memory was 103.2 MB in the beginning and 114.8 MB in the end (delta: -11.6 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, 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, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred 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, 9 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 45 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 54 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 15 NumberOfCodeBlocks, 15 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 896 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...