/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/recursive_list.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:10:34,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:10:34,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:10:34,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:10:34,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:10:34,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:10:34,796 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:10:34,798 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:10:34,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:10:34,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:10:34,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:10:34,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:10:34,805 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:10:34,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:10:34,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:10:34,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:10:34,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:10:34,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:10:34,828 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:10:34,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:10:34,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:10:34,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:10:34,843 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:10:34,849 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:10:34,857 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:10:34,874 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:10:34,876 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:10:34,877 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:10:34,878 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-21 16:10:34,939 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:10:34,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:10:34,941 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:10:34,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:10:34,941 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:10:34,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:10:34,942 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:10:34,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:10:34,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:10:34,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:10:34,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:10:34,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:10:34,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:10:34,943 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:10:34,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:10:34,944 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:10:34,944 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:10:34,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:10:34,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:10:34,945 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:10:34,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:10:34,945 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:10:34,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:10:34,945 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:10:34,946 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:10:34,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:10:34,946 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:10:34,946 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:10:34,946 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:10:35,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:10:35,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:10:35,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:10:35,443 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:10:35,446 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:10:35,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/recursive_list.i [2021-02-21 16:10:35,539 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7b111c4c/70ac5f78371046f99772f93bbe4823fb/FLAGb68a5a295 [2021-02-21 16:10:36,157 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:10:36,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/recursive_list.i [2021-02-21 16:10:36,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7b111c4c/70ac5f78371046f99772f93bbe4823fb/FLAGb68a5a295 [2021-02-21 16:10:36,557 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7b111c4c/70ac5f78371046f99772f93bbe4823fb [2021-02-21 16:10:36,562 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:10:36,578 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:10:36,583 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:10:36,583 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:10:36,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:10:36,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:10:36" (1/1) ... [2021-02-21 16:10:36,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70b96e97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:36, skipping insertion in model container [2021-02-21 16:10:36,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:10:36" (1/1) ... [2021-02-21 16:10:36,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:10:36,628 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:10:36,845 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/recursive_list.i[409,422] [2021-02-21 16:10:36,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:10:36,908 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:10:36,924 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/recursive_list.i[409,422] [2021-02-21 16:10:36,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:10:36,966 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:10:36,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:36 WrapperNode [2021-02-21 16:10:36,967 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:10:36,969 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:10:36,969 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:10:36,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:10:36,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:36" (1/1) ... [2021-02-21 16:10:36,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:36" (1/1) ... [2021-02-21 16:10:37,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:36" (1/1) ... [2021-02-21 16:10:37,006 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:36" (1/1) ... [2021-02-21 16:10:37,032 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:36" (1/1) ... [2021-02-21 16:10:37,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:36" (1/1) ... [2021-02-21 16:10:37,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:36" (1/1) ... [2021-02-21 16:10:37,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:10:37,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:10:37,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:10:37,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:10:37,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-02-21 16:10:37,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:10:37,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:10:37,181 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:10:37,181 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2021-02-21 16:10:37,181 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_memory [2021-02-21 16:10:37,182 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2021-02-21 16:10:37,182 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:10:37,182 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:10:37,183 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:10:37,183 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:10:37,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:10:37,184 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-21 16:10:37,185 INFO L130 BoogieDeclarations]: Found specification of procedure err [2021-02-21 16:10:37,185 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_memory [2021-02-21 16:10:37,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-21 16:10:37,187 INFO L130 BoogieDeclarations]: Found specification of procedure append [2021-02-21 16:10:37,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:10:37,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-21 16:10:37,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:10:37,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-21 16:10:37,187 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:10:37,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:10:37,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:10:37,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:10:37,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:10:37,604 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:10:37,609 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:10:37,614 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:10:37 BoogieIcfgContainer [2021-02-21 16:10:37,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:10:37,620 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:10:37,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:10:37,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:10:37,629 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:10:36" (1/3) ... [2021-02-21 16:10:37,630 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252fbd54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:10:37, skipping insertion in model container [2021-02-21 16:10:37,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:10:36" (2/3) ... [2021-02-21 16:10:37,631 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@252fbd54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:10:37, skipping insertion in model container [2021-02-21 16:10:37,634 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:10:37" (3/3) ... [2021-02-21 16:10:37,639 INFO L111 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2021-02-21 16:10:37,657 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:10:37,667 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:10:37,702 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:10:37,748 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:10:37,748 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:10:37,748 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:10:37,748 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:10:37,749 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:10:37,749 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:10:37,750 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:10:37,750 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:10:37,777 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2021-02-21 16:10:37,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-21 16:10:37,787 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:10:37,789 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:10:37,789 INFO L428 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:10:37,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:10:37,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2225660, now seen corresponding path program 1 times [2021-02-21 16:10:37,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:10:37,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400050097] [2021-02-21 16:10:37,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:10:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:10:38,199 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:10:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:10:38,265 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:10:38,310 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 16:10:38,311 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 16:10:38,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:10:38,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:10:38 BoogieIcfgContainer [2021-02-21 16:10:38,370 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:10:38,374 INFO L168 Benchmark]: Toolchain (without parser) took 1806.55 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 111.2 MB in the end (delta: 13.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 8.0 GB. [2021-02-21 16:10:38,376 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 123.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:10:38,379 INFO L168 Benchmark]: CACSL2BoogieTranslator took 385.05 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 114.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:10:38,380 INFO L168 Benchmark]: Boogie Preprocessor took 79.27 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 112.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:10:38,383 INFO L168 Benchmark]: RCFGBuilder took 565.57 ms. Allocated memory is still 151.0 MB. Free memory was 112.6 MB in the beginning and 131.0 MB in the end (delta: -18.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2021-02-21 16:10:38,385 INFO L168 Benchmark]: TraceAbstraction took 749.98 ms. Allocated memory is still 151.0 MB. Free memory was 130.1 MB in the beginning and 111.2 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. [2021-02-21 16:10:38,396 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 151.0 MB. Free memory is still 123.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 385.05 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 114.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 79.27 ms. Allocated memory is still 151.0 MB. Free memory was 114.3 MB in the beginning and 112.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 565.57 ms. Allocated memory is still 151.0 MB. Free memory was 112.6 MB in the beginning and 131.0 MB in the end (delta: -18.4 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 749.98 ms. Allocated memory is still 151.0 MB. Free memory was 130.1 MB in the beginning and 111.2 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i = 1; VAL [\old(i)=56, i=1] [L39] struct list *l,m; [L40] l = &m [L41] l->next = 0 [L42] l->n = 0 VAL [i=1, l={3:0}, m={3:0}] [L44] CALL, EXPR append(l, 1) VAL [\old(n)=1, i=1, l={3:0}] [L27] struct list *new_el; VAL [\old(n)=1, i=1, l={3:0}, l={3:0}, n=1] [L29] CALL, EXPR allocate_memory() VAL [i=1] [L22] return malloc(8U); VAL [\result={-1:0}, i=1, malloc(8U)={-1:0}] [L29] RET, EXPR allocate_memory() VAL [\old(n)=1, allocate_memory()={-1:0}, i=1, l={3:0}, l={3:0}, n=1] [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; VAL [\old(n)=1, \result={-1:0}, i=1, l={3:0}, l={3:0}, n=1, new_el={-1:0}] [L44] RET, EXPR append(l, 1) VAL [append(l, 1)={-1:0}, i=1, l={3:0}, m={3:0}] [L44] l = append(l, 1) [L45] CALL, EXPR append(l, 2) VAL [\old(n)=2, i=1, l={-1:0}] [L27] struct list *new_el; VAL [\old(n)=2, i=1, l={-1:0}, l={-1:0}, n=2] [L29] CALL, EXPR allocate_memory() VAL [i=1] [L22] return malloc(8U); VAL [\result={-2:0}, i=1, malloc(8U)={-2:0}] [L29] RET, EXPR allocate_memory() VAL [\old(n)=2, allocate_memory()={-2:0}, i=1, l={-1:0}, l={-1:0}, n=2] [L29] new_el = allocate_memory() [L31] new_el->n = n [L32] new_el->next = l [L34] return new_el; VAL [\old(n)=2, \result={-2:0}, i=1, l={-1:0}, l={-1:0}, n=2, new_el={-2:0}] [L45] RET, EXPR append(l, 2) VAL [append(l, 2)={-2:0}, i=1, l={-1:0}, m={3:0}] [L45] l = append(l, 2) [L50] EXPR l->next [L50] EXPR l->next->next [L50] EXPR l->next->next->n VAL [i=1, l={-2:0}, l->next={-1:0}, l->next->next={3:0}, l->next->next->n=0, m={3:0}] [L50] COND TRUE l->next->next->n == 0 [L50] CALL err() VAL [i=1] [L10] reach_error() VAL [i=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 2, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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 incorrect! Received shutdown request...