./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 13:54:11,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 13:54:11,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 13:54:11,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 13:54:11,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 13:54:11,773 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 13:54:11,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 13:54:11,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 13:54:11,784 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 13:54:11,789 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 13:54:11,790 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 13:54:11,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 13:54:11,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 13:54:11,794 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 13:54:11,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 13:54:11,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 13:54:11,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 13:54:11,802 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 13:54:11,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 13:54:11,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 13:54:11,806 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 13:54:11,807 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 13:54:11,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 13:54:11,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 13:54:11,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 13:54:11,811 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 13:54:11,811 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 13:54:11,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 13:54:11,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 13:54:11,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 13:54:11,813 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 13:54:11,814 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 13:54:11,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 13:54:11,815 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 13:54:11,816 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 13:54:11,816 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 13:54:11,817 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 13:54:11,817 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 13:54:11,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 13:54:11,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 13:54:11,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 13:54:11,820 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-12-15 13:54:11,858 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 13:54:11,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 13:54:11,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 13:54:11,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 13:54:11,862 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 13:54:11,862 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 13:54:11,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 13:54:11,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 13:54:11,863 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 13:54:11,863 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 13:54:11,864 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 13:54:11,865 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 13:54:11,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 13:54:11,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 13:54:11,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 13:54:11,865 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 13:54:11,866 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 13:54:11,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 13:54:11,866 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 13:54:11,866 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 13:54:11,866 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 13:54:11,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 13:54:11,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 13:54:11,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 13:54:11,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:54:11,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 13:54:11,868 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 13:54:11,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 13:54:11,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 13:54:11,868 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 13:54:11,868 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2021-12-15 13:54:12,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 13:54:12,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 13:54:12,114 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 13:54:12,115 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 13:54:12,115 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 13:54:12,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2021-12-15 13:54:12,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a42ac9ac/a28310dfcea54975bd277129be7ffdc5/FLAGf3d62dd10 [2021-12-15 13:54:12,583 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 13:54:12,596 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2021-12-15 13:54:12,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a42ac9ac/a28310dfcea54975bd277129be7ffdc5/FLAGf3d62dd10 [2021-12-15 13:54:12,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a42ac9ac/a28310dfcea54975bd277129be7ffdc5 [2021-12-15 13:54:12,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 13:54:12,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 13:54:12,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 13:54:12,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 13:54:12,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 13:54:12,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:54:12" (1/1) ... [2021-12-15 13:54:12,654 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9ed8d01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:12, skipping insertion in model container [2021-12-15 13:54:12,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:54:12" (1/1) ... [2021-12-15 13:54:12,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 13:54:12,701 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 13:54:12,911 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2021-12-15 13:54:12,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:54:12,958 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 13:54:12,982 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2021-12-15 13:54:12,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:54:13,017 INFO L208 MainTranslator]: Completed translation [2021-12-15 13:54:13,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:13 WrapperNode [2021-12-15 13:54:13,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 13:54:13,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 13:54:13,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 13:54:13,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 13:54:13,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:13" (1/1) ... [2021-12-15 13:54:13,039 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:13" (1/1) ... [2021-12-15 13:54:13,065 INFO L137 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 203 [2021-12-15 13:54:13,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 13:54:13,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 13:54:13,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 13:54:13,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 13:54:13,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:13" (1/1) ... [2021-12-15 13:54:13,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:13" (1/1) ... [2021-12-15 13:54:13,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:13" (1/1) ... [2021-12-15 13:54:13,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:13" (1/1) ... [2021-12-15 13:54:13,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:13" (1/1) ... [2021-12-15 13:54:13,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:13" (1/1) ... [2021-12-15 13:54:13,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:13" (1/1) ... [2021-12-15 13:54:13,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 13:54:13,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 13:54:13,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 13:54:13,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 13:54:13,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:13" (1/1) ... [2021-12-15 13:54:13,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:54:13,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:54:13,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 13:54:13,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 13:54:13,197 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-12-15 13:54:13,197 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-12-15 13:54:13,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 13:54:13,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 13:54:13,198 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 13:54:13,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 13:54:13,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 13:54:13,198 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2021-12-15 13:54:13,198 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2021-12-15 13:54:13,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 13:54:13,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-15 13:54:13,198 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2021-12-15 13:54:13,198 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2021-12-15 13:54:13,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 13:54:13,198 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2021-12-15 13:54:13,198 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2021-12-15 13:54:13,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 13:54:13,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 13:54:13,324 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 13:54:13,326 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 13:54:13,884 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 13:54:13,903 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 13:54:13,903 INFO L301 CfgBuilder]: Removed 33 assume(true) statements. [2021-12-15 13:54:13,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:54:13 BoogieIcfgContainer [2021-12-15 13:54:13,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 13:54:13,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 13:54:13,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 13:54:13,911 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 13:54:13,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 01:54:12" (1/3) ... [2021-12-15 13:54:13,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aad2a75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:54:13, skipping insertion in model container [2021-12-15 13:54:13,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:13" (2/3) ... [2021-12-15 13:54:13,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aad2a75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:54:13, skipping insertion in model container [2021-12-15 13:54:13,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:54:13" (3/3) ... [2021-12-15 13:54:13,915 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2021-12-15 13:54:13,920 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 13:54:13,920 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 83 error locations. [2021-12-15 13:54:13,966 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 13:54:13,971 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 13:54:13,972 INFO L340 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2021-12-15 13:54:13,990 INFO L276 IsEmpty]: Start isEmpty. Operand has 223 states, 120 states have (on average 2.1083333333333334) internal successors, (253), 210 states have internal predecessors, (253), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-15 13:54:13,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-15 13:54:13,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:54:13,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-15 13:54:13,997 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-15 13:54:14,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:54:14,002 INFO L85 PathProgramCache]: Analyzing trace with hash 6220774, now seen corresponding path program 1 times [2021-12-15 13:54:14,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:54:14,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868498504] [2021-12-15 13:54:14,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:54:14,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:54:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:54:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:54:14,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 13:54:14,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868498504] [2021-12-15 13:54:14,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868498504] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:54:14,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:54:14,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:54:14,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672364396] [2021-12-15 13:54:14,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:54:14,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 13:54:14,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 13:54:14,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 13:54:14,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 13:54:14,183 INFO L87 Difference]: Start difference. First operand has 223 states, 120 states have (on average 2.1083333333333334) internal successors, (253), 210 states have internal predecessors, (253), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:54:14,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:54:14,225 INFO L93 Difference]: Finished difference Result 221 states and 242 transitions. [2021-12-15 13:54:14,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 13:54:14,227 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-12-15 13:54:14,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:54:14,239 INFO L225 Difference]: With dead ends: 221 [2021-12-15 13:54:14,239 INFO L226 Difference]: Without dead ends: 219 [2021-12-15 13:54:14,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 13:54:14,252 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:54:14,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:54:14,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-15 13:54:14,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2021-12-15 13:54:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 116 states have (on average 1.8448275862068966) internal successors, (214), 206 states have internal predecessors, (214), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-15 13:54:14,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 240 transitions. [2021-12-15 13:54:14,324 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 240 transitions. Word has length 4 [2021-12-15 13:54:14,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:54:14,324 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 240 transitions. [2021-12-15 13:54:14,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:54:14,325 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 240 transitions. [2021-12-15 13:54:14,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:54:14,326 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:54:14,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:54:14,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 13:54:14,327 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting chain_nodeErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-15 13:54:14,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:54:14,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1692154958, now seen corresponding path program 1 times [2021-12-15 13:54:14,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 13:54:14,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61290271] [2021-12-15 13:54:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:54:14,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 13:54:14,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 13:54:14,354 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:89) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 13:54:14,358 INFO L158 Benchmark]: Toolchain (without parser) took 1710.66ms. Allocated memory was 86.0MB in the beginning and 113.2MB in the end (delta: 27.3MB). Free memory was 64.3MB in the beginning and 47.6MB in the end (delta: 16.8MB). Peak memory consumption was 43.7MB. Max. memory is 16.1GB. [2021-12-15 13:54:14,358 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 86.0MB. Free memory is still 62.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 13:54:14,359 INFO L158 Benchmark]: CACSL2BoogieTranslator took 370.65ms. Allocated memory is still 86.0MB. Free memory was 64.2MB in the beginning and 46.9MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-12-15 13:54:14,360 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.46ms. Allocated memory is still 86.0MB. Free memory was 46.7MB in the beginning and 44.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 13:54:14,361 INFO L158 Benchmark]: Boogie Preprocessor took 39.75ms. Allocated memory is still 86.0MB. Free memory was 44.3MB in the beginning and 42.0MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 13:54:14,361 INFO L158 Benchmark]: RCFGBuilder took 799.54ms. Allocated memory was 86.0MB in the beginning and 113.2MB in the end (delta: 27.3MB). Free memory was 42.0MB in the beginning and 71.3MB in the end (delta: -29.3MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. [2021-12-15 13:54:14,362 INFO L158 Benchmark]: TraceAbstraction took 448.98ms. Allocated memory is still 113.2MB. Free memory was 70.7MB in the beginning and 47.6MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-12-15 13:54:14,364 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 86.0MB. Free memory is still 62.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 370.65ms. Allocated memory is still 86.0MB. Free memory was 64.2MB in the beginning and 46.9MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.46ms. Allocated memory is still 86.0MB. Free memory was 46.7MB in the beginning and 44.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.75ms. Allocated memory is still 86.0MB. Free memory was 44.3MB in the beginning and 42.0MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 799.54ms. Allocated memory was 86.0MB in the beginning and 113.2MB in the end (delta: 27.3MB). Free memory was 42.0MB in the beginning and 71.3MB in the end (delta: -29.3MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. * TraceAbstraction took 448.98ms. Allocated memory is still 113.2MB. Free memory was 70.7MB in the beginning and 47.6MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 13:54:14,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 13:54:16,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 13:54:16,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 13:54:16,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 13:54:16,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 13:54:16,407 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 13:54:16,408 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 13:54:16,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 13:54:16,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 13:54:16,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 13:54:16,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 13:54:16,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 13:54:16,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 13:54:16,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 13:54:16,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 13:54:16,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 13:54:16,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 13:54:16,434 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 13:54:16,437 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 13:54:16,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 13:54:16,445 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 13:54:16,446 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 13:54:16,447 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 13:54:16,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 13:54:16,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 13:54:16,455 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 13:54:16,455 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 13:54:16,457 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 13:54:16,457 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 13:54:16,458 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 13:54:16,458 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 13:54:16,459 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 13:54:16,460 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 13:54:16,461 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 13:54:16,462 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 13:54:16,462 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 13:54:16,462 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 13:54:16,463 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 13:54:16,463 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 13:54:16,464 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 13:54:16,465 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 13:54:16,466 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Bitvector.epf [2021-12-15 13:54:16,507 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 13:54:16,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 13:54:16,508 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 13:54:16,509 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 13:54:16,510 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 13:54:16,510 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 13:54:16,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 13:54:16,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 13:54:16,511 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 13:54:16,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 13:54:16,512 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 13:54:16,513 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-15 13:54:16,513 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 13:54:16,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 13:54:16,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 13:54:16,513 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-15 13:54:16,514 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-15 13:54:16,514 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 13:54:16,514 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 13:54:16,514 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 13:54:16,514 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 13:54:16,514 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 13:54:16,515 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 13:54:16,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 13:54:16,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 13:54:16,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 13:54:16,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:54:16,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 13:54:16,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 13:54:16,525 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 13:54:16,525 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 13:54:16,525 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 13:54:16,526 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 13:54:16,526 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2021-12-15 13:54:16,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 13:54:16,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 13:54:16,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 13:54:16,869 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 13:54:16,869 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 13:54:16,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2021-12-15 13:54:16,927 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38ca13b6f/ec406c0edd3f4ac783b7551d98c29fab/FLAG07b6efa6e [2021-12-15 13:54:17,465 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 13:54:17,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2021-12-15 13:54:17,479 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38ca13b6f/ec406c0edd3f4ac783b7551d98c29fab/FLAG07b6efa6e [2021-12-15 13:54:17,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38ca13b6f/ec406c0edd3f4ac783b7551d98c29fab [2021-12-15 13:54:17,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 13:54:17,904 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 13:54:17,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 13:54:17,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 13:54:17,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 13:54:17,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:54:17" (1/1) ... [2021-12-15 13:54:17,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51594d6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:17, skipping insertion in model container [2021-12-15 13:54:17,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 01:54:17" (1/1) ... [2021-12-15 13:54:17,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 13:54:17,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 13:54:18,221 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2021-12-15 13:54:18,270 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:54:18,284 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 13:54:18,319 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i[22636,22649] [2021-12-15 13:54:18,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 13:54:18,391 INFO L208 MainTranslator]: Completed translation [2021-12-15 13:54:18,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:18 WrapperNode [2021-12-15 13:54:18,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 13:54:18,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 13:54:18,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 13:54:18,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 13:54:18,400 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:18" (1/1) ... [2021-12-15 13:54:18,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:18" (1/1) ... [2021-12-15 13:54:18,470 INFO L137 Inliner]: procedures = 130, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 201 [2021-12-15 13:54:18,471 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 13:54:18,472 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 13:54:18,472 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 13:54:18,473 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 13:54:18,479 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:18" (1/1) ... [2021-12-15 13:54:18,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:18" (1/1) ... [2021-12-15 13:54:18,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:18" (1/1) ... [2021-12-15 13:54:18,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:18" (1/1) ... [2021-12-15 13:54:18,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:18" (1/1) ... [2021-12-15 13:54:18,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:18" (1/1) ... [2021-12-15 13:54:18,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:18" (1/1) ... [2021-12-15 13:54:18,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 13:54:18,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 13:54:18,543 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 13:54:18,543 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 13:54:18,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:18" (1/1) ... [2021-12-15 13:54:18,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 13:54:18,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 13:54:18,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 13:54:18,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 13:54:18,614 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-12-15 13:54:18,614 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-12-15 13:54:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 13:54:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 13:54:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-15 13:54:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 13:54:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 13:54:18,615 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2021-12-15 13:54:18,616 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2021-12-15 13:54:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 13:54:18,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-15 13:54:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 13:54:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2021-12-15 13:54:18,617 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2021-12-15 13:54:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2021-12-15 13:54:18,617 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2021-12-15 13:54:18,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 13:54:18,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 13:54:18,812 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 13:54:18,814 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 13:54:19,466 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 13:54:19,472 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 13:54:19,472 INFO L301 CfgBuilder]: Removed 33 assume(true) statements. [2021-12-15 13:54:19,474 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:54:19 BoogieIcfgContainer [2021-12-15 13:54:19,474 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 13:54:19,475 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 13:54:19,476 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 13:54:19,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 13:54:19,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 01:54:17" (1/3) ... [2021-12-15 13:54:19,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641c2993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:54:19, skipping insertion in model container [2021-12-15 13:54:19,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 01:54:18" (2/3) ... [2021-12-15 13:54:19,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@641c2993 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 01:54:19, skipping insertion in model container [2021-12-15 13:54:19,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 01:54:19" (3/3) ... [2021-12-15 13:54:19,480 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2021-12-15 13:54:19,484 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 13:54:19,484 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 83 error locations. [2021-12-15 13:54:19,532 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 13:54:19,540 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 13:54:19,541 INFO L340 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2021-12-15 13:54:19,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 220 states, 117 states have (on average 2.1367521367521367) internal successors, (250), 207 states have internal predecessors, (250), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-15 13:54:19,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-15 13:54:19,585 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:54:19,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-15 13:54:19,587 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-15 13:54:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:54:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash 6220742, now seen corresponding path program 1 times [2021-12-15 13:54:19,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:54:19,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877048730] [2021-12-15 13:54:19,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:54:19,604 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:54:19,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:54:19,611 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:54:19,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 13:54:19,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 13:54:19,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-15 13:54:19,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 13:54:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 13:54:19,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 13:54:19,743 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 13:54:19,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877048730] [2021-12-15 13:54:19,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877048730] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 13:54:19,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 13:54:19,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 13:54:19,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978700207] [2021-12-15 13:54:19,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 13:54:19,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 13:54:19,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 13:54:19,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 13:54:19,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 13:54:19,785 INFO L87 Difference]: Start difference. First operand has 220 states, 117 states have (on average 2.1367521367521367) internal successors, (250), 207 states have internal predecessors, (250), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:54:19,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 13:54:19,826 INFO L93 Difference]: Finished difference Result 218 states and 239 transitions. [2021-12-15 13:54:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 13:54:19,829 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-12-15 13:54:19,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 13:54:19,841 INFO L225 Difference]: With dead ends: 218 [2021-12-15 13:54:19,841 INFO L226 Difference]: Without dead ends: 216 [2021-12-15 13:54:19,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 13:54:19,846 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 13:54:19,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 13:54:19,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-15 13:54:19,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-12-15 13:54:19,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 113 states have (on average 1.8672566371681416) internal successors, (211), 203 states have internal predecessors, (211), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-15 13:54:19,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 237 transitions. [2021-12-15 13:54:19,919 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 237 transitions. Word has length 4 [2021-12-15 13:54:19,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 13:54:19,920 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 237 transitions. [2021-12-15 13:54:19,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 13:54:19,926 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 237 transitions. [2021-12-15 13:54:19,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 13:54:19,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 13:54:19,927 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 13:54:19,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-15 13:54:20,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:54:20,137 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting chain_nodeErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-15 13:54:20,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 13:54:20,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1692065585, now seen corresponding path program 1 times [2021-12-15 13:54:20,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 13:54:20,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1296408228] [2021-12-15 13:54:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 13:54:20,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 13:54:20,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 13:54:20,142 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 13:54:20,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-15 13:54:20,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-15 13:54:20,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 13:54:20,388 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-15 13:54:20,392 INFO L158 Benchmark]: Toolchain (without parser) took 2487.19ms. Allocated memory was 60.8MB in the beginning and 75.5MB in the end (delta: 14.7MB). Free memory was 40.1MB in the beginning and 51.2MB in the end (delta: -11.2MB). Peak memory consumption was 4.3MB. Max. memory is 16.1GB. [2021-12-15 13:54:20,396 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 60.8MB. Free memory was 43.1MB in the beginning and 43.0MB in the end (delta: 50.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 13:54:20,397 INFO L158 Benchmark]: CACSL2BoogieTranslator took 488.15ms. Allocated memory is still 60.8MB. Free memory was 39.8MB in the beginning and 35.5MB in the end (delta: 4.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 13:54:20,397 INFO L158 Benchmark]: Boogie Procedure Inliner took 77.62ms. Allocated memory is still 60.8MB. Free memory was 35.5MB in the beginning and 33.0MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 13:54:20,399 INFO L158 Benchmark]: Boogie Preprocessor took 65.40ms. Allocated memory is still 60.8MB. Free memory was 32.8MB in the beginning and 30.5MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 13:54:20,402 INFO L158 Benchmark]: RCFGBuilder took 935.97ms. Allocated memory was 60.8MB in the beginning and 75.5MB in the end (delta: 14.7MB). Free memory was 30.4MB in the beginning and 54.1MB in the end (delta: -23.8MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. [2021-12-15 13:54:20,403 INFO L158 Benchmark]: TraceAbstraction took 914.82ms. Allocated memory is still 75.5MB. Free memory was 53.4MB in the beginning and 51.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.7MB. Max. memory is 16.1GB. [2021-12-15 13:54:20,406 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 60.8MB. Free memory was 43.1MB in the beginning and 43.0MB in the end (delta: 50.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 488.15ms. Allocated memory is still 60.8MB. Free memory was 39.8MB in the beginning and 35.5MB in the end (delta: 4.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 77.62ms. Allocated memory is still 60.8MB. Free memory was 35.5MB in the beginning and 33.0MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.40ms. Allocated memory is still 60.8MB. Free memory was 32.8MB in the beginning and 30.5MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 935.97ms. Allocated memory was 60.8MB in the beginning and 75.5MB in the end (delta: 14.7MB). Free memory was 30.4MB in the beginning and 54.1MB in the end (delta: -23.8MB). Peak memory consumption was 19.2MB. Max. memory is 16.1GB. * TraceAbstraction took 914.82ms. Allocated memory is still 75.5MB. Free memory was 53.4MB in the beginning and 51.2MB in the end (delta: 2.2MB). Peak memory consumption was 2.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-15 13:54:20,437 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable