/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/recursive_list.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 13:23:48,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 13:23:48,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 13:23:48,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 13:23:48,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 13:23:48,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 13:23:48,893 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 13:23:48,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 13:23:48,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 13:23:48,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 13:23:48,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 13:23:48,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 13:23:48,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 13:23:48,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 13:23:48,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 13:23:48,903 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 13:23:48,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 13:23:48,904 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 13:23:48,906 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 13:23:48,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 13:23:48,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 13:23:48,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 13:23:48,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 13:23:48,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 13:23:48,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 13:23:48,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 13:23:48,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 13:23:48,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 13:23:48,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 13:23:48,937 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 13:23:48,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 13:23:48,939 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 13:23:48,939 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 13:23:48,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 13:23:48,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 13:23:48,940 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 13:23:48,940 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 13:23:48,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 13:23:48,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 13:23:48,940 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 13:23:48,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 13:23:48,941 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 13:23:48,941 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 13:23:48,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 13:23:48,941 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 13:23:48,941 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 13:23:48,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 13:23:48,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 13:23:48,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 13:23:48,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 13:23:48,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 13:23:48,943 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 13:23:49,222 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 13:23:49,240 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 13:23:49,245 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 13:23:49,247 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 13:23:49,247 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 13:23:49,248 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-07-07 13:23:49,327 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1c8024f8/2c9977cd888140ceae2cd71d5c1fe7d6/FLAGec133ff1a [2020-07-07 13:23:49,738 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 13:23:49,738 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/recursive_list.i [2020-07-07 13:23:49,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1c8024f8/2c9977cd888140ceae2cd71d5c1fe7d6/FLAGec133ff1a [2020-07-07 13:23:50,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1c8024f8/2c9977cd888140ceae2cd71d5c1fe7d6 [2020-07-07 13:23:50,174 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 13:23:50,176 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 13:23:50,177 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 13:23:50,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 13:23:50,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 13:23:50,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:23:50" (1/1) ... [2020-07-07 13:23:50,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72768c62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:50, skipping insertion in model container [2020-07-07 13:23:50,184 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:23:50" (1/1) ... [2020-07-07 13:23:50,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 13:23:50,214 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 13:23:50,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:23:50,408 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 13:23:50,432 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 13:23:50,455 INFO L208 MainTranslator]: Completed translation [2020-07-07 13:23:50,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:50 WrapperNode [2020-07-07 13:23:50,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 13:23:50,457 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 13:23:50,457 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 13:23:50,457 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 13:23:50,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:50" (1/1) ... [2020-07-07 13:23:50,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:50" (1/1) ... [2020-07-07 13:23:50,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:50" (1/1) ... [2020-07-07 13:23:50,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:50" (1/1) ... [2020-07-07 13:23:50,660 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:50" (1/1) ... [2020-07-07 13:23:50,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:50" (1/1) ... [2020-07-07 13:23:50,663 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:50" (1/1) ... [2020-07-07 13:23:50,665 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 13:23:50,665 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 13:23:50,665 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 13:23:50,666 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 13:23:50,667 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:50" (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 [2020-07-07 13:23:50,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 13:23:50,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 13:23:50,730 INFO L138 BoogieDeclarations]: Found implementation of procedure err [2020-07-07 13:23:50,730 INFO L138 BoogieDeclarations]: Found implementation of procedure allocate_memory [2020-07-07 13:23:50,731 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2020-07-07 13:23:50,731 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 13:23:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 13:23:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-07 13:23:50,731 INFO L130 BoogieDeclarations]: Found specification of procedure err [2020-07-07 13:23:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure allocate_memory [2020-07-07 13:23:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-07 13:23:50,732 INFO L130 BoogieDeclarations]: Found specification of procedure append [2020-07-07 13:23:50,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-07 13:23:50,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-07 13:23:50,733 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 13:23:50,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-07 13:23:50,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-07 13:23:50,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-07 13:23:50,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-07 13:23:50,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 13:23:50,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 13:23:51,156 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 13:23:51,156 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 13:23:51,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:23:51 BoogieIcfgContainer [2020-07-07 13:23:51,161 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 13:23:51,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 13:23:51,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 13:23:51,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 13:23:51,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:23:50" (1/3) ... [2020-07-07 13:23:51,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ab8250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:23:51, skipping insertion in model container [2020-07-07 13:23:51,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:50" (2/3) ... [2020-07-07 13:23:51,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33ab8250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:23:51, skipping insertion in model container [2020-07-07 13:23:51,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:23:51" (3/3) ... [2020-07-07 13:23:51,169 INFO L109 eAbstractionObserver]: Analyzing ICFG recursive_list.i [2020-07-07 13:23:51,179 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 13:23:51,187 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 13:23:51,200 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 13:23:51,219 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 13:23:51,219 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 13:23:51,219 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 13:23:51,219 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 13:23:51,219 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 13:23:51,219 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 13:23:51,220 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 13:23:51,220 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 13:23:51,234 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states. [2020-07-07 13:23:51,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-07 13:23:51,247 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 13:23:51,248 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 13:23:51,248 INFO L427 AbstractCegarLoop]: === Iteration 1 === [errErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 13:23:51,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 13:23:51,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2037520420, now seen corresponding path program 1 times [2020-07-07 13:23:51,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 13:23:51,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536441541] [2020-07-07 13:23:51,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 13:23:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:23:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 13:23:51,642 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 13:23:51,644 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-07 13:23:51,645 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 13:23:51,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 13:23:51,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:23:51 BoogieIcfgContainer [2020-07-07 13:23:51,667 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 13:23:51,671 INFO L168 Benchmark]: Toolchain (without parser) took 1493.48 ms. Allocated memory was 146.8 MB in the beginning and 207.6 MB in the end (delta: 60.8 MB). Free memory was 103.8 MB in the beginning and 143.8 MB in the end (delta: -40.0 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-07-07 13:23:51,672 INFO L168 Benchmark]: CDTParser took 0.83 ms. Allocated memory is still 146.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-07 13:23:51,673 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.25 ms. Allocated memory is still 146.8 MB. Free memory was 103.6 MB in the beginning and 93.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-07 13:23:51,674 INFO L168 Benchmark]: Boogie Preprocessor took 207.93 ms. Allocated memory was 146.8 MB in the beginning and 207.6 MB in the end (delta: 60.8 MB). Free memory was 93.3 MB in the beginning and 185.8 MB in the end (delta: -92.5 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-07 13:23:51,675 INFO L168 Benchmark]: RCFGBuilder took 495.51 ms. Allocated memory is still 207.6 MB. Free memory was 185.8 MB in the beginning and 166.9 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-07-07 13:23:51,676 INFO L168 Benchmark]: TraceAbstraction took 505.35 ms. Allocated memory is still 207.6 MB. Free memory was 166.2 MB in the beginning and 143.8 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. [2020-07-07 13:23:51,680 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83 ms. Allocated memory is still 146.8 MB. Free memory was 122.1 MB in the beginning and 121.9 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.25 ms. Allocated memory is still 146.8 MB. Free memory was 103.6 MB in the beginning and 93.3 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 207.93 ms. Allocated memory was 146.8 MB in the beginning and 207.6 MB in the end (delta: 60.8 MB). Free memory was 93.3 MB in the beginning and 185.8 MB in the end (delta: -92.5 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 495.51 ms. Allocated memory is still 207.6 MB. Free memory was 185.8 MB in the beginning and 166.9 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 505.35 ms. Allocated memory is still 207.6 MB. Free memory was 166.2 MB in the beginning and 143.8 MB in the end (delta: 22.5 MB). Peak memory consumption was 22.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i = 1; [L37] struct list *l,m; [L38] l = &m [L39] l->next = 0 [L40] l->n = 0 [L42] CALL, EXPR append(l, 1) [L25] struct list *new_el; [L27] CALL, EXPR allocate_memory() [L20] return malloc(8U); [L27] RET, EXPR allocate_memory() [L27] new_el = allocate_memory() [L29] new_el->n = n [L30] new_el->next = l [L32] return new_el; [L42] RET, EXPR append(l, 1) [L42] l = append(l, 1) [L43] CALL, EXPR append(l, 2) [L25] struct list *new_el; [L27] CALL, EXPR allocate_memory() [L20] return malloc(8U); [L27] RET, EXPR allocate_memory() [L27] new_el = allocate_memory() [L29] new_el->n = n [L30] new_el->next = l [L32] return new_el; [L43] RET, EXPR append(l, 2) [L43] l = append(l, 2) [L48] EXPR l->next [L48] EXPR l->next->next [L48] EXPR l->next->next->n [L48] COND TRUE l->next->next->n == 0 [L48] CALL err() [L8] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 55 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, 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=55occurred 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: No data available, 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...