./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 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL --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-0f8a17c [2021-11-19 04:11:06,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:11:06,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:11:06,077 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:11:06,078 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:11:06,079 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:11:06,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:11:06,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:11:06,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:11:06,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:11:06,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:11:06,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:11:06,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:11:06,092 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:11:06,094 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:11:06,096 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:11:06,097 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:11:06,098 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:11:06,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:11:06,105 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:11:06,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:11:06,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:11:06,111 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:11:06,112 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:11:06,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:11:06,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:11:06,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:11:06,119 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:11:06,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:11:06,121 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:11:06,121 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:11:06,122 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:11:06,123 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:11:06,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:11:06,126 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:11:06,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:11:06,127 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:11:06,128 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:11:06,128 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:11:06,129 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:11:06,130 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:11:06,132 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-19 04:11:06,173 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:11:06,173 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:11:06,173 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:11:06,173 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:11:06,174 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:11:06,174 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:11:06,175 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:11:06,183 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:11:06,183 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:11:06,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:11:06,187 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:11:06,187 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 04:11:06,188 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:11:06,188 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:11:06,188 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:11:06,188 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 04:11:06,188 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 04:11:06,188 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 04:11:06,189 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:11:06,189 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 04:11:06,189 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:11:06,189 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:11:06,190 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:11:06,190 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:11:06,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:11:06,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:11:06,191 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:11:06,191 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:11:06,191 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:11:06,191 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:11:06,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:11:06,192 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_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a759f8d678ad469b9fde9b60c61d539be5ffd1b82a7250e29929fb245cee5670 [2021-11-19 04:11:06,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:11:06,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:11:06,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:11:06,541 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:11:06,542 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:11:06,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2021-11-19 04:11:06,614 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/data/f188ddf29/413b60dcf9774f838ee21ed2609be9ea/FLAG5b068126a [2021-11-19 04:11:07,120 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:11:07,121 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2021-11-19 04:11:07,126 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/data/f188ddf29/413b60dcf9774f838ee21ed2609be9ea/FLAG5b068126a [2021-11-19 04:11:07,498 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/data/f188ddf29/413b60dcf9774f838ee21ed2609be9ea [2021-11-19 04:11:07,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:11:07,502 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 04:11:07,507 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:11:07,507 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:11:07,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:11:07,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:11:07" (1/1) ... [2021-11-19 04:11:07,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27d587c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:07, skipping insertion in model container [2021-11-19 04:11:07,516 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:11:07" (1/1) ... [2021-11-19 04:11:07,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:11:07,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:11:07,661 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:11:07,669 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:11:07,716 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:11:07,731 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:11:07,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:07 WrapperNode [2021-11-19 04:11:07,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:11:07,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:11:07,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:11:07,746 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:11:07,759 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:07" (1/1) ... [2021-11-19 04:11:07,760 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:07" (1/1) ... [2021-11-19 04:11:07,772 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:07" (1/1) ... [2021-11-19 04:11:07,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:07" (1/1) ... [2021-11-19 04:11:07,777 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:07" (1/1) ... [2021-11-19 04:11:07,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:07" (1/1) ... [2021-11-19 04:11:07,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:07" (1/1) ... [2021-11-19 04:11:07,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:11:07,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:11:07,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:11:07,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:11:07,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:07" (1/1) ... [2021-11-19 04:11:07,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:11:07,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:11:07,817 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:11:07,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:11:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 04:11:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:11:07,874 INFO L138 BoogieDeclarations]: Found implementation of procedure freePointer [2021-11-19 04:11:07,875 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 04:11:07,875 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 04:11:07,876 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-19 04:11:07,876 INFO L130 BoogieDeclarations]: Found specification of procedure freePointer [2021-11-19 04:11:07,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:11:07,876 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 04:11:07,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-19 04:11:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:11:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 04:11:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:11:07,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:11:07,958 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:11:07,960 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:11:08,108 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:11:08,114 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:11:08,115 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-19 04:11:08,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:11:08 BoogieIcfgContainer [2021-11-19 04:11:08,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:11:08,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:11:08,120 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:11:08,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:11:08,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:11:07" (1/3) ... [2021-11-19 04:11:08,125 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eea3643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:11:08, skipping insertion in model container [2021-11-19 04:11:08,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:11:07" (2/3) ... [2021-11-19 04:11:08,126 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eea3643 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:11:08, skipping insertion in model container [2021-11-19 04:11:08,126 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:11:08" (3/3) ... [2021-11-19 04:11:08,127 INFO L111 eAbstractionObserver]: Analyzing ICFG derefAfterFree1.c [2021-11-19 04:11:08,133 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:11:08,133 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-19 04:11:08,198 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:11:08,205 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 [2021-11-19 04:11:08,205 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-19 04:11:08,221 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) [2021-11-19 04:11:08,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-19 04:11:08,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:11:08,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:11:08,231 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting freePointerErr0ASSERT_VIOLATIONMEMORY_FREE === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-11-19 04:11:08,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:11:08,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1608321379, now seen corresponding path program 1 times [2021-11-19 04:11:08,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:11:08,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690352903] [2021-11-19 04:11:08,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:11:08,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:11:08,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:11:08,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:11:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:11:08,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:11:08,436 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:11:08,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690352903] [2021-11-19 04:11:08,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690352903] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:11:08,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:11:08,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:11:08,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301603127] [2021-11-19 04:11:08,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:11:08,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:11:08,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:11:08,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:11:08,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:11:08,507 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) [2021-11-19 04:11:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:11:08,663 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2021-11-19 04:11:08,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:11:08,666 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 [2021-11-19 04:11:08,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:11:08,674 INFO L225 Difference]: With dead ends: 24 [2021-11-19 04:11:08,674 INFO L226 Difference]: Without dead ends: 21 [2021-11-19 04:11:08,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:11:08,684 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:11:08,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 44 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:11:08,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-19 04:11:08,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-11-19 04:11:08,717 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) [2021-11-19 04:11:08,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2021-11-19 04:11:08,719 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 9 [2021-11-19 04:11:08,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:11:08,719 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2021-11-19 04:11:08,720 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) [2021-11-19 04:11:08,720 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2021-11-19 04:11:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-19 04:11:08,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:11:08,721 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:11:08,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:11:08,721 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting freePointerErr1ASSERT_VIOLATIONMEMORY_FREE === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-11-19 04:11:08,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:11:08,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1681644769, now seen corresponding path program 1 times [2021-11-19 04:11:08,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:11:08,723 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968749175] [2021-11-19 04:11:08,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:11:08,723 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:11:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:11:08,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:11:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:11:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:11:08,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:11:08,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968749175] [2021-11-19 04:11:08,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968749175] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:11:08,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:11:08,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:11:08,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541247] [2021-11-19 04:11:08,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:11:08,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:11:08,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:11:08,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:11:08,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:11:08,842 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) [2021-11-19 04:11:08,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:11:08,946 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2021-11-19 04:11:08,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:11:08,947 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 [2021-11-19 04:11:08,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:11:08,949 INFO L225 Difference]: With dead ends: 20 [2021-11-19 04:11:08,949 INFO L226 Difference]: Without dead ends: 20 [2021-11-19 04:11:08,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:11:08,957 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:11:08,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 25 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:11:08,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-19 04:11:08,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-19 04:11:08,966 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) [2021-11-19 04:11:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2021-11-19 04:11:08,968 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 10 [2021-11-19 04:11:08,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:11:08,968 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2021-11-19 04:11:08,968 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) [2021-11-19 04:11:08,969 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2021-11-19 04:11:08,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 04:11:08,974 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:11:08,974 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:11:08,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 04:11:08,975 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting freePointerErr2ASSERT_VIOLATIONMEMORY_FREE === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-11-19 04:11:08,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:11:08,978 INFO L85 PathProgramCache]: Analyzing trace with hash -591380251, now seen corresponding path program 1 times [2021-11-19 04:11:08,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:11:08,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299482411] [2021-11-19 04:11:08,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:11:08,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:11:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:11:09,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 04:11:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:11:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:11:09,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:11:09,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299482411] [2021-11-19 04:11:09,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299482411] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:11:09,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:11:09,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:11:09,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461128243] [2021-11-19 04:11:09,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:11:09,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:11:09,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:11:09,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:11:09,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:11:09,059 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) [2021-11-19 04:11:09,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:11:09,124 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2021-11-19 04:11:09,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:11:09,124 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 [2021-11-19 04:11:09,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:11:09,125 INFO L225 Difference]: With dead ends: 19 [2021-11-19 04:11:09,125 INFO L226 Difference]: Without dead ends: 19 [2021-11-19 04:11:09,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:11:09,127 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:11:09,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 27 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:11:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-19 04:11:09,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-19 04:11:09,132 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) [2021-11-19 04:11:09,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2021-11-19 04:11:09,133 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 11 [2021-11-19 04:11:09,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:11:09,133 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2021-11-19 04:11:09,133 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) [2021-11-19 04:11:09,134 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2021-11-19 04:11:09,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-19 04:11:09,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:11:09,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:11:09,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 04:11:09,135 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [freePointerErr0ASSERT_VIOLATIONMEMORY_FREE, freePointerErr1ASSERT_VIOLATIONMEMORY_FREE, freePointerErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-11-19 04:11:09,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:11:09,136 INFO L85 PathProgramCache]: Analyzing trace with hash 146827991, now seen corresponding path program 1 times [2021-11-19 04:11:09,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:11:09,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714152202] [2021-11-19 04:11:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:11:09,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:11:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 04:11:09,165 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 04:11:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 04:11:09,222 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-19 04:11:09,222 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 04:11:09,223 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0REQUIRES_VIOLATION (5 of 6 remaining) [2021-11-19 04:11:09,225 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freePointerErr0ASSERT_VIOLATIONMEMORY_FREE (4 of 6 remaining) [2021-11-19 04:11:09,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freePointerErr1ASSERT_VIOLATIONMEMORY_FREE (3 of 6 remaining) [2021-11-19 04:11:09,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location freePointerErr2ASSERT_VIOLATIONMEMORY_FREE (2 of 6 remaining) [2021-11-19 04:11:09,226 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (1 of 6 remaining) [2021-11-19 04:11:09,227 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ENSURES_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2021-11-19 04:11:09,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 04:11:09,231 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-19 04:11:09,253 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 04:11:09,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 04:11:09 BoogieIcfgContainer [2021-11-19 04:11:09,271 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 04:11:09,271 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 04:11:09,272 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 04:11:09,272 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 04:11:09,272 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:11:08" (3/4) ... [2021-11-19 04:11:09,274 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-19 04:11:09,305 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/witness.graphml [2021-11-19 04:11:09,305 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 04:11:09,306 INFO L158 Benchmark]: Toolchain (without parser) took 1803.59ms. Allocated memory was 86.0MB in the beginning and 109.1MB in the end (delta: 23.1MB). Free memory was 47.3MB in the beginning and 84.9MB in the end (delta: -37.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:11:09,307 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 86.0MB. Free memory is still 64.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:11:09,307 INFO L158 Benchmark]: CACSL2BoogieTranslator took 235.91ms. Allocated memory was 86.0MB in the beginning and 109.1MB in the end (delta: 23.1MB). Free memory was 47.1MB in the beginning and 88.6MB in the end (delta: -41.5MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. [2021-11-19 04:11:09,308 INFO L158 Benchmark]: Boogie Preprocessor took 37.44ms. Allocated memory is still 109.1MB. Free memory was 88.2MB in the beginning and 87.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 04:11:09,308 INFO L158 Benchmark]: RCFGBuilder took 335.57ms. Allocated memory is still 109.1MB. Free memory was 87.2MB in the beginning and 77.6MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 04:11:09,309 INFO L158 Benchmark]: TraceAbstraction took 1151.57ms. Allocated memory is still 109.1MB. Free memory was 77.1MB in the beginning and 86.3MB in the end (delta: -9.1MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. [2021-11-19 04:11:09,309 INFO L158 Benchmark]: Witness Printer took 34.06ms. Allocated memory is still 109.1MB. Free memory was 86.3MB in the beginning and 84.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 04:11:09,312 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 86.0MB. Free memory is still 64.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 235.91ms. Allocated memory was 86.0MB in the beginning and 109.1MB in the end (delta: 23.1MB). Free memory was 47.1MB in the beginning and 88.6MB in the end (delta: -41.5MB). Peak memory consumption was 10.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.44ms. Allocated memory is still 109.1MB. Free memory was 88.2MB in the beginning and 87.2MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 335.57ms. Allocated memory is still 109.1MB. Free memory was 87.2MB in the beginning and 77.6MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1151.57ms. Allocated memory is still 109.1MB. Free memory was 77.1MB in the beginning and 86.3MB in the end (delta: -9.1MB). Peak memory consumption was 50.3MB. Max. memory is 16.1GB. * Witness Printer took 34.06ms. Allocated memory is still 109.1MB. Free memory was 86.3MB in the beginning and 84.9MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * 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: 1.1s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 75 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 75 mSDsluCounter, 96 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 54 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 101 IncrementalHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 42 mSDtfsCounter, 101 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=0, InterpolantAutomatonStates: 18, 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, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 87 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! [2021-11-19 04:11:09,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0add4fcf-7397-4af9-a5ba-1b0a6c87a833/bin/uautomizer-ZXIjhQolGL/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)