./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a759f8d678ad469b9fde9b60c61d539be5ffd1b82a7250e29929fb245cee5670 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:53:04,954 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:53:04,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:53:05,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:53:05,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:53:05,012 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:53:05,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:53:05,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:53:05,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:53:05,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:53:05,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:53:05,024 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:53:05,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:53:05,026 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:53:05,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:53:05,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:53:05,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:53:05,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:53:05,039 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:53:05,043 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:53:05,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:53:05,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:53:05,057 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:53:05,060 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:53:05,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:53:05,071 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:53:05,071 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:53:05,072 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:53:05,073 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:53:05,074 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:53:05,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:53:05,075 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:53:05,076 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:53:05,077 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:53:05,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:53:05,079 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:53:05,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:53:05,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:53:05,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:53:05,082 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:53:05,083 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:53:05,084 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 09:53:05,108 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:53:05,109 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:53:05,109 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:53:05,110 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:53:05,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:53:05,111 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:53:05,112 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:53:05,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:53:05,112 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:53:05,112 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 09:53:05,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:53:05,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:53:05,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:53:05,113 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 09:53:05,114 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 09:53:05,114 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 09:53:05,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:53:05,114 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 09:53:05,114 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:53:05,115 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:53:05,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:53:05,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:53:05,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:53:05,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:53:05,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:53:05,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:53:05,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:53:05,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:53:05,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:53:05,117 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a759f8d678ad469b9fde9b60c61d539be5ffd1b82a7250e29929fb245cee5670 [2021-11-09 09:53:05,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:53:05,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:53:05,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:53:05,429 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:53:05,431 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:53:05,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2021-11-09 09:53:05,544 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/data/86bba8731/267ee2a31dfa491582f2cde07f670071/FLAGa60d13d61 [2021-11-09 09:53:06,001 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:53:06,002 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2021-11-09 09:53:06,008 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/data/86bba8731/267ee2a31dfa491582f2cde07f670071/FLAGa60d13d61 [2021-11-09 09:53:06,392 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/data/86bba8731/267ee2a31dfa491582f2cde07f670071 [2021-11-09 09:53:06,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:53:06,397 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 09:53:06,414 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:53:06,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:53:06,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:53:06,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:53:06" (1/1) ... [2021-11-09 09:53:06,421 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23315ff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:53:06, skipping insertion in model container [2021-11-09 09:53:06,422 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:53:06" (1/1) ... [2021-11-09 09:53:06,430 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:53:06,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:53:06,670 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:53:06,682 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:53:06,701 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:53:06,725 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:53:06,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:53:06 WrapperNode [2021-11-09 09:53:06,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:53:06,728 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:53:06,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:53:06,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:53:06,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:53:06" (1/1) ... [2021-11-09 09:53:06,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:53:06" (1/1) ... [2021-11-09 09:53:06,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:53:06" (1/1) ... [2021-11-09 09:53:06,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:53:06" (1/1) ... [2021-11-09 09:53:06,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:53:06" (1/1) ... [2021-11-09 09:53:06,774 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:53:06" (1/1) ... [2021-11-09 09:53:06,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:53:06" (1/1) ... [2021-11-09 09:53:06,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:53:06,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:53:06,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:53:06,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:53:06,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:53:06" (1/1) ... [2021-11-09 09:53:06,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:53:06,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:53:06,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:53:06,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:53:06,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 09:53:06,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:53:06,912 INFO L138 BoogieDeclarations]: Found implementation of procedure freePointer [2021-11-09 09:53:06,912 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 09:53:06,913 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 09:53:06,913 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 09:53:06,913 INFO L130 BoogieDeclarations]: Found specification of procedure freePointer [2021-11-09 09:53:06,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 09:53:06,915 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 09:53:06,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:53:06,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:53:06,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 09:53:06,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:53:06,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:53:07,164 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:53:07,164 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-09 09:53:07,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:53:07 BoogieIcfgContainer [2021-11-09 09:53:07,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:53:07,169 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:53:07,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:53:07,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:53:07,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:53:06" (1/3) ... [2021-11-09 09:53:07,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c34d67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:53:07, skipping insertion in model container [2021-11-09 09:53:07,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:53:06" (2/3) ... [2021-11-09 09:53:07,178 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c34d67f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:53:07, skipping insertion in model container [2021-11-09 09:53:07,178 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:53:07" (3/3) ... [2021-11-09 09:53:07,180 INFO L111 eAbstractionObserver]: Analyzing ICFG derefAfterFree1.c [2021-11-09 09:53:07,187 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:53:07,188 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-09 09:53:07,245 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:53:07,255 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 [2021-11-09 09:53:07,255 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-09 09:53:07,277 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.5) internal successors, (18), 18 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-09 09:53:07,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 09:53:07,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:07,288 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:07,289 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting freePointerErr0ASSERT_VIOLATIONMEMORY_FREE === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-11-09 09:53:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:07,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1608321379, now seen corresponding path program 1 times [2021-11-09 09:53:07,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:07,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997416466] [2021-11-09 09:53:07,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:07,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:07,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:07,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:53:07,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:53:07,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:07,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997416466] [2021-11-09 09:53:07,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997416466] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:53:07,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:53:07,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:53:07,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590208930] [2021-11-09 09:53:07,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:53:07,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:07,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:53:07,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:53:07,619 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 1.5) internal successors, (18), 18 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:53:07,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:07,874 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2021-11-09 09:53:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:53:07,877 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-11-09 09:53:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:07,899 INFO L225 Difference]: With dead ends: 24 [2021-11-09 09:53:07,900 INFO L226 Difference]: Without dead ends: 21 [2021-11-09 09:53:07,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:53:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-09 09:53:07,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-09 09:53:07,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 15 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:53:07,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2021-11-09 09:53:07,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 9 [2021-11-09 09:53:07,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:07,942 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2021-11-09 09:53:07,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:53:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2021-11-09 09:53:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-09 09:53:07,943 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:07,944 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:07,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:53:07,945 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting freePointerErr1ASSERT_VIOLATIONMEMORY_FREE === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-11-09 09:53:07,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:07,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1681644769, now seen corresponding path program 1 times [2021-11-09 09:53:07,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:07,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050664692] [2021-11-09 09:53:07,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:07,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:08,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:53:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:53:08,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:08,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050664692] [2021-11-09 09:53:08,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050664692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:53:08,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:53:08,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:53:08,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838802137] [2021-11-09 09:53:08,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:53:08,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:08,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:53:08,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:53:08,077 INFO L87 Difference]: Start difference. First operand 21 states and 20 transitions. Second operand has 6 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:53:08,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:08,249 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2021-11-09 09:53:08,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 09:53:08,251 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-09 09:53:08,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:08,253 INFO L225 Difference]: With dead ends: 20 [2021-11-09 09:53:08,254 INFO L226 Difference]: Without dead ends: 20 [2021-11-09 09:53:08,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:53:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-09 09:53:08,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-09 09:53:08,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 14 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:53:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2021-11-09 09:53:08,267 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 10 [2021-11-09 09:53:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:08,269 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2021-11-09 09:53:08,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:53:08,269 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2021-11-09 09:53:08,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 09:53:08,270 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:08,271 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:08,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:53:08,272 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting freePointerErr2ASSERT_VIOLATIONMEMORY_FREE === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-11-09 09:53:08,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:08,275 INFO L85 PathProgramCache]: Analyzing trace with hash -591380251, now seen corresponding path program 1 times [2021-11-09 09:53:08,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:08,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109374971] [2021-11-09 09:53:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:08,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:08,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 09:53:08,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:53:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:53:08,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:53:08,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109374971] [2021-11-09 09:53:08,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109374971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:53:08,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:53:08,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 09:53:08,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421415356] [2021-11-09 09:53:08,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:53:08,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:53:08,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:53:08,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:53:08,393 INFO L87 Difference]: Start difference. First operand 20 states and 19 transitions. Second operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:53:08,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:53:08,456 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2021-11-09 09:53:08,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:53:08,457 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-09 09:53:08,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:53:08,458 INFO L225 Difference]: With dead ends: 19 [2021-11-09 09:53:08,458 INFO L226 Difference]: Without dead ends: 19 [2021-11-09 09:53:08,458 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:53:08,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-09 09:53:08,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-09 09:53:08,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 13 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 09:53:08,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2021-11-09 09:53:08,462 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 11 [2021-11-09 09:53:08,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:53:08,462 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2021-11-09 09:53:08,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 09:53:08,463 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2021-11-09 09:53:08,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-09 09:53:08,465 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:53:08,466 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:53:08,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:53:08,467 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-11-09 09:53:08,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:53:08,472 INFO L85 PathProgramCache]: Analyzing trace with hash 146827991, now seen corresponding path program 1 times [2021-11-09 09:53:08,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:53:08,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846142951] [2021-11-09 09:53:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:53:08,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:53:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 09:53:08,497 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 09:53:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 09:53:08,547 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 09:53:08,548 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-09 09:53:08,549 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0REQUIRES_VIOLATION [2021-11-09 09:53:08,555 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freePointerErr0ASSERT_VIOLATIONMEMORY_FREE [2021-11-09 09:53:08,556 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freePointerErr1ASSERT_VIOLATIONMEMORY_FREE [2021-11-09 09:53:08,556 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freePointerErr2ASSERT_VIOLATIONMEMORY_FREE [2021-11-09 09:53:08,556 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-11-09 09:53:08,556 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ENSURES_VIOLATIONMEMORY_LEAK [2021-11-09 09:53:08,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:53:08,560 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-09 09:53:08,569 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-09 09:53:08,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 09:53:08 BoogieIcfgContainer [2021-11-09 09:53:08,594 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-09 09:53:08,596 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 09:53:08,596 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 09:53:08,596 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 09:53:08,597 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:53:07" (3/4) ... [2021-11-09 09:53:08,599 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-09 09:53:08,662 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/witness.graphml [2021-11-09 09:53:08,662 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 09:53:08,665 INFO L168 Benchmark]: Toolchain (without parser) took 2266.54 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 51.7 MB in the beginning and 64.8 MB in the end (delta: -13.1 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2021-11-09 09:53:08,665 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 86.0 MB. Free memory was 55.4 MB in the beginning and 55.4 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 09:53:08,667 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.25 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 51.5 MB in the beginning and 90.1 MB in the end (delta: -38.7 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2021-11-09 09:53:08,667 INFO L168 Benchmark]: Boogie Preprocessor took 58.41 ms. Allocated memory is still 113.2 MB. Free memory was 90.1 MB in the beginning and 89.1 MB in the end (delta: 999.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 09:53:08,668 INFO L168 Benchmark]: RCFGBuilder took 379.53 ms. Allocated memory is still 113.2 MB. Free memory was 88.9 MB in the beginning and 79.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-09 09:53:08,668 INFO L168 Benchmark]: TraceAbstraction took 1424.44 ms. Allocated memory is still 113.2 MB. Free memory was 79.2 MB in the beginning and 66.4 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. [2021-11-09 09:53:08,669 INFO L168 Benchmark]: Witness Printer took 66.28 ms. Allocated memory is still 113.2 MB. Free memory was 66.4 MB in the beginning and 64.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-09 09:53:08,677 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 86.0 MB. Free memory was 55.4 MB in the beginning and 55.4 MB in the end (delta: 21.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 313.25 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 51.5 MB in the beginning and 90.1 MB in the end (delta: -38.7 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.41 ms. Allocated memory is still 113.2 MB. Free memory was 90.1 MB in the beginning and 89.1 MB in the end (delta: 999.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 379.53 ms. Allocated memory is still 113.2 MB. Free memory was 88.9 MB in the beginning and 79.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1424.44 ms. Allocated memory is still 113.2 MB. Free memory was 79.2 MB in the beginning and 66.4 MB in the end (delta: 12.9 MB). Peak memory consumption was 14.6 MB. Max. memory is 16.1 GB. * Witness Printer took 66.28 ms. Allocated memory is still 113.2 MB. Free memory was 66.4 MB in the beginning and 64.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int* p = malloc(10 * sizeof(int)); [L12] CALL freePointer(p) VAL [p={-1:0}] [L6] free(p) VAL [p={-1:0}, p={-1:0}] [L6] free(p) VAL [p={-1:0}, p={-1:0}] [L6] free(p) [L12] RET freePointer(p) VAL [p={-1:0}] [L14] p[0] = 1 - UnprovableResult [Line: 6]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 9]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 35 SDtfs, 47 SDslu, 75 SDs, 0 SdLazy, 114 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 96 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-09 09:53:08,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d47ce855-1a82-4546-93f5-cce6015a54e6/bin/uautomizer-IVEQpCNsaX/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)