./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 e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8 --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 --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:43:53,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:43:53,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:43:53,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:43:53,118 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:43:53,120 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:43:53,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:43:53,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:43:53,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:43:53,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:43:53,129 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:43:53,130 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:43:53,131 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:43:53,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:43:53,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:43:53,136 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:43:53,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:43:53,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:43:53,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:43:53,143 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:43:53,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:43:53,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:43:53,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:43:53,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:43:53,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:43:53,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:43:53,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:43:53,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:43:53,166 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:43:53,167 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:43:53,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:43:53,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:43:53,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:43:53,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:43:53,177 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:43:53,177 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:43:53,178 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:43:53,179 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:43:53,179 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:43:53,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:43:53,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:43:53,182 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 11:43:53,210 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:43:53,211 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:43:53,211 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:43:53,211 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:43:53,212 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:43:53,212 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:43:53,213 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:43:53,213 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:43:53,213 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:43:53,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:43:53,214 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:43:53,214 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 11:43:53,215 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:43:53,215 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:43:53,215 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:43:53,215 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 11:43:53,215 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 11:43:53,216 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 11:43:53,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:43:53,216 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 11:43:53,216 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:43:53,217 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:43:53,217 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:43:53,217 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:43:53,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:43:53,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:43:53,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:43:53,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:43:53,219 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:43:53,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:43:53,219 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_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a759f8d678ad469b9fde9b60c61d539be5ffd1b82a7250e29929fb245cee5670 [2022-11-16 11:43:53,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:43:53,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:43:53,598 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:43:53,601 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:43:53,602 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:43:53,604 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2022-11-16 11:43:53,693 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/data/d041a575b/56589396b93545a39a3a55fbb3d06687/FLAGdd1a6e919 [2022-11-16 11:43:54,287 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:43:54,288 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2022-11-16 11:43:54,295 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/data/d041a575b/56589396b93545a39a3a55fbb3d06687/FLAGdd1a6e919 [2022-11-16 11:43:54,680 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/data/d041a575b/56589396b93545a39a3a55fbb3d06687 [2022-11-16 11:43:54,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:43:54,688 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:43:54,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:43:54,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:43:54,696 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:43:54,697 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:43:54" (1/1) ... [2022-11-16 11:43:54,700 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3018ac7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:54, skipping insertion in model container [2022-11-16 11:43:54,700 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:43:54" (1/1) ... [2022-11-16 11:43:54,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:43:54,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:43:55,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:43:55,037 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:43:55,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:43:55,071 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:43:55,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:55 WrapperNode [2022-11-16 11:43:55,072 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:43:55,073 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:43:55,073 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:43:55,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:43:55,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:55" (1/1) ... [2022-11-16 11:43:55,096 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:55" (1/1) ... [2022-11-16 11:43:55,140 INFO L138 Inliner]: procedures = 10, calls = 6, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 17 [2022-11-16 11:43:55,141 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:43:55,142 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:43:55,142 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:43:55,142 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:43:55,153 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:55" (1/1) ... [2022-11-16 11:43:55,153 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:55" (1/1) ... [2022-11-16 11:43:55,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:55" (1/1) ... [2022-11-16 11:43:55,167 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:55" (1/1) ... [2022-11-16 11:43:55,171 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:55" (1/1) ... [2022-11-16 11:43:55,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:55" (1/1) ... [2022-11-16 11:43:55,174 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:55" (1/1) ... [2022-11-16 11:43:55,175 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:55" (1/1) ... [2022-11-16 11:43:55,176 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:43:55,177 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:43:55,177 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:43:55,178 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:43:55,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:55" (1/1) ... [2022-11-16 11:43:55,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:43:55,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:43:55,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:43:55,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:43:55,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 11:43:55,273 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 11:43:55,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:43:55,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:43:55,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 11:43:55,367 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:43:55,369 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:43:55,555 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:43:55,562 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:43:55,562 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-16 11:43:55,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:43:55 BoogieIcfgContainer [2022-11-16 11:43:55,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:43:55,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:43:55,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:43:55,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:43:55,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:43:54" (1/3) ... [2022-11-16 11:43:55,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287f12f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:43:55, skipping insertion in model container [2022-11-16 11:43:55,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:43:55" (2/3) ... [2022-11-16 11:43:55,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@287f12f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:43:55, skipping insertion in model container [2022-11-16 11:43:55,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:43:55" (3/3) ... [2022-11-16 11:43:55,584 INFO L112 eAbstractionObserver]: Analyzing ICFG derefAfterFree1.c [2022-11-16 11:43:55,625 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:43:55,625 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-16 11:43:55,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:43:55,726 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@155cce22, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:43:55,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-16 11:43:55,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 10 states have (on average 1.6) internal successors, (16), 16 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:55,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-16 11:43:55,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:55,741 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-16 11:43:55,742 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2022-11-16 11:43:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:55,749 INFO L85 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2022-11-16 11:43:55,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:55,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50537670] [2022-11-16 11:43:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:55,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:55,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:55,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:55,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:55,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50537670] [2022-11-16 11:43:55,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50537670] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:55,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:55,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:43:55,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268813937] [2022-11-16 11:43:55,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:56,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:43:56,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:56,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:43:56,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:43:56,042 INFO L87 Difference]: Start difference. First operand has 17 states, 10 states have (on average 1.6) internal successors, (16), 16 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:56,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:56,063 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2022-11-16 11:43:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:43:56,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-16 11:43:56,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:56,076 INFO L225 Difference]: With dead ends: 16 [2022-11-16 11:43:56,076 INFO L226 Difference]: Without dead ends: 14 [2022-11-16 11:43:56,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:43:56,083 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:56,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 15 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:43:56,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-16 11:43:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-16 11:43:56,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 13 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:56,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2022-11-16 11:43:56,125 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 3 [2022-11-16 11:43:56,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:56,126 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2022-11-16 11:43:56,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:56,126 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2022-11-16 11:43:56,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 11:43:56,127 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:56,127 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 11:43:56,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:43:56,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2022-11-16 11:43:56,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:56,130 INFO L85 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2022-11-16 11:43:56,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:56,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728418288] [2022-11-16 11:43:56,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:56,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:56,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:56,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:56,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:56,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728418288] [2022-11-16 11:43:56,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728418288] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:56,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:56,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:43:56,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950470635] [2022-11-16 11:43:56,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:56,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:43:56,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:56,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:43:56,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:43:56,347 INFO L87 Difference]: Start difference. First operand 14 states and 13 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:56,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:56,367 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2022-11-16 11:43:56,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:43:56,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-16 11:43:56,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:56,370 INFO L225 Difference]: With dead ends: 13 [2022-11-16 11:43:56,370 INFO L226 Difference]: Without dead ends: 13 [2022-11-16 11:43:56,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:43:56,373 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:56,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 9 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:43:56,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-16 11:43:56,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-16 11:43:56,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 12 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:56,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 12 transitions. [2022-11-16 11:43:56,385 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 12 transitions. Word has length 4 [2022-11-16 11:43:56,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:56,386 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 12 transitions. [2022-11-16 11:43:56,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 12 transitions. [2022-11-16 11:43:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 11:43:56,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:56,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 11:43:56,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:43:56,392 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2022-11-16 11:43:56,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:56,396 INFO L85 PathProgramCache]: Analyzing trace with hash 28692770, now seen corresponding path program 1 times [2022-11-16 11:43:56,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:56,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937429846] [2022-11-16 11:43:56,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:56,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:56,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:43:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:43:56,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:43:56,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937429846] [2022-11-16 11:43:56,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937429846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:43:56,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:43:56,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 11:43:56,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077425097] [2022-11-16 11:43:56,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:43:56,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:43:56,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:43:56,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:43:56,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:43:56,500 INFO L87 Difference]: Start difference. First operand 13 states and 12 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:56,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:43:56,517 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2022-11-16 11:43:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:43:56,518 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-16 11:43:56,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:43:56,519 INFO L225 Difference]: With dead ends: 12 [2022-11-16 11:43:56,519 INFO L226 Difference]: Without dead ends: 12 [2022-11-16 11:43:56,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 11:43:56,522 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:43:56,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:43:56,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-16 11:43:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-16 11:43:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 11 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:56,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 11 transitions. [2022-11-16 11:43:56,527 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 11 transitions. Word has length 5 [2022-11-16 11:43:56,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:43:56,527 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 11 transitions. [2022-11-16 11:43:56,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 11:43:56,528 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 11 transitions. [2022-11-16 11:43:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-16 11:43:56,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:43:56,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:43:56,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:43:56,530 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2022-11-16 11:43:56,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:43:56,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1803949477, now seen corresponding path program 1 times [2022-11-16 11:43:56,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:43:56,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740957968] [2022-11-16 11:43:56,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:43:56,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:43:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:43:56,552 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 11:43:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 11:43:56,584 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 11:43:56,584 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 11:43:56,586 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 6 remaining) [2022-11-16 11:43:56,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE (4 of 6 remaining) [2022-11-16 11:43:56,589 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE (3 of 6 remaining) [2022-11-16 11:43:56,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (2 of 6 remaining) [2022-11-16 11:43:56,590 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 6 remaining) [2022-11-16 11:43:56,591 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2022-11-16 11:43:56,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:43:56,596 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 11:43:56,602 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 11:43:56,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 11:43:56 BoogieIcfgContainer [2022-11-16 11:43:56,626 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 11:43:56,627 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 11:43:56,627 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 11:43:56,627 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 11:43:56,628 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:43:55" (3/4) ... [2022-11-16 11:43:56,630 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-16 11:43:56,688 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/witness.graphml [2022-11-16 11:43:56,695 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 11:43:56,696 INFO L158 Benchmark]: Toolchain (without parser) took 2007.74ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 79.1MB in the beginning and 91.2MB in the end (delta: -12.0MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2022-11-16 11:43:56,697 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 107.0MB. Free memory is still 60.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:43:56,697 INFO L158 Benchmark]: CACSL2BoogieTranslator took 380.62ms. Allocated memory is still 107.0MB. Free memory was 78.9MB in the beginning and 83.1MB in the end (delta: -4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 11:43:56,698 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.79ms. Allocated memory is still 107.0MB. Free memory was 83.1MB in the beginning and 81.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:43:56,698 INFO L158 Benchmark]: Boogie Preprocessor took 34.58ms. Allocated memory is still 107.0MB. Free memory was 81.5MB in the beginning and 80.6MB in the end (delta: 881.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 11:43:56,698 INFO L158 Benchmark]: RCFGBuilder took 387.47ms. Allocated memory is still 107.0MB. Free memory was 80.4MB in the beginning and 71.4MB in the end (delta: 9.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2022-11-16 11:43:56,699 INFO L158 Benchmark]: TraceAbstraction took 1059.00ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 70.5MB in the beginning and 93.3MB in the end (delta: -22.8MB). Peak memory consumption was 2.0MB. Max. memory is 16.1GB. [2022-11-16 11:43:56,700 INFO L158 Benchmark]: Witness Printer took 68.57ms. Allocated memory is still 130.0MB. Free memory was 93.3MB in the beginning and 91.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 11:43:56,702 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 107.0MB. Free memory is still 60.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 380.62ms. Allocated memory is still 107.0MB. Free memory was 78.9MB in the beginning and 83.1MB in the end (delta: -4.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.79ms. Allocated memory is still 107.0MB. Free memory was 83.1MB in the beginning and 81.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.58ms. Allocated memory is still 107.0MB. Free memory was 81.5MB in the beginning and 80.6MB in the end (delta: 881.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 387.47ms. Allocated memory is still 107.0MB. Free memory was 80.4MB in the beginning and 71.4MB in the end (delta: 9.0MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 1059.00ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 70.5MB in the beginning and 93.3MB in the end (delta: -22.8MB). Peak memory consumption was 2.0MB. Max. memory is 16.1GB. * Witness Printer took 68.57ms. Allocated memory is still 130.0MB. Free memory was 93.3MB in the beginning and 91.2MB in the end (delta: 2.1MB). 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: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int* p = malloc(10 * sizeof(int)); [L12] CALL freePointer(p) [L6] free(p) VAL [p={2:0}, p={2:0}] [L6] free(p) VAL [p={2:0}, p={2:0}] [L6] free(p) [L12] RET freePointer(p) [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: -1]: 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 1 procedures, 17 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 22 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 22 mSDsluCounter, 36 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12 IncrementalHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 32 mSDtfsCounter, 12 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 9, 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, 0.3s InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 31 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! [2022-11-16 11:43:56,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_929c8fa7-dfb3-456c-a729-7d287df29755/bin/uautomizer-tPACEb0tL8/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)