./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 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8 --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d452f938d74713dbff7e0330f8ef393409d67ffe ............................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:19:52,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:19:52,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:19:52,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:19:52,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:19:52,862 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:19:52,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:19:52,871 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:19:52,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:19:52,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:19:52,878 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:19:52,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:19:52,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:19:52,890 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:19:52,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:19:52,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:19:52,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:19:52,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:19:52,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:19:52,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:19:52,917 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:19:52,919 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:19:52,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:19:52,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:19:52,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:19:52,931 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:19:52,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:19:52,934 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:19:52,935 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:19:52,936 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:19:52,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:19:52,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:19:52,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:19:52,942 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:19:52,943 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:19:52,944 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:19:52,945 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:19:52,945 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:19:52,945 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:19:52,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:19:52,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:19:52,948 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 07:19:52,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:19:52,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:19:52,999 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:19:53,000 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:19:53,000 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:19:53,000 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:19:53,001 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:19:53,001 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:19:53,001 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:19:53,001 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:19:53,002 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:19:53,003 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:19:53,003 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:19:53,003 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:19:53,004 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:19:53,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:19:53,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:19:53,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:19:53,005 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:19:53,006 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:19:53,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:19:53,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:19:53,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:19:53,007 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:19:53,007 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:19:53,007 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:19:53,009 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:19:53,009 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:19:53,009 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:19:53,009 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:19:53,010 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:19:53,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:19:53,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:19:53,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:19:53,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:19:53,011 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:19:53,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:19:53,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:19:53,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:19:53,012 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d452f938d74713dbff7e0330f8ef393409d67ffe [2021-10-13 07:19:53,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:19:53,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:19:53,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:19:53,327 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:19:53,328 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:19:53,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2021-10-13 07:19:53,411 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/data/a0ef55dac/b1cb189f70e945e49e78c0ec2b4beb43/FLAG6c77dfa81 [2021-10-13 07:19:53,869 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:19:53,871 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2021-10-13 07:19:53,882 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/data/a0ef55dac/b1cb189f70e945e49e78c0ec2b4beb43/FLAG6c77dfa81 [2021-10-13 07:19:54,243 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/data/a0ef55dac/b1cb189f70e945e49e78c0ec2b4beb43 [2021-10-13 07:19:54,246 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:19:54,247 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:19:54,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:19:54,249 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:19:54,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:19:54,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:19:54" (1/1) ... [2021-10-13 07:19:54,255 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@484352b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:54, skipping insertion in model container [2021-10-13 07:19:54,255 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:19:54" (1/1) ... [2021-10-13 07:19:54,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:19:54,273 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:19:54,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:19:54,453 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:19:54,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:19:54,491 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:19:54,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:54 WrapperNode [2021-10-13 07:19:54,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:19:54,492 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:19:54,493 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:19:54,493 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:19:54,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:54" (1/1) ... [2021-10-13 07:19:54,508 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:54" (1/1) ... [2021-10-13 07:19:54,526 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:19:54,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:19:54,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:19:54,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:19:54,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:54" (1/1) ... [2021-10-13 07:19:54,536 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:54" (1/1) ... [2021-10-13 07:19:54,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:54" (1/1) ... [2021-10-13 07:19:54,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:54" (1/1) ... [2021-10-13 07:19:54,542 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:54" (1/1) ... [2021-10-13 07:19:54,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:54" (1/1) ... [2021-10-13 07:19:54,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:54" (1/1) ... [2021-10-13 07:19:54,546 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:19:54,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:19:54,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:19:54,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:19:54,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:54" (1/1) ... [2021-10-13 07:19:54,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:19:54,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:19:54,587 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:19:54,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:19:54,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:19:54,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:19:54,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:19:54,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:19:54,630 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:19:54,862 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:19:54,862 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-13 07:19:54,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:19:54 BoogieIcfgContainer [2021-10-13 07:19:54,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:19:54,867 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:19:54,867 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:19:54,886 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:19:54,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:19:54" (1/3) ... [2021-10-13 07:19:54,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b427278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:19:54, skipping insertion in model container [2021-10-13 07:19:54,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:19:54" (2/3) ... [2021-10-13 07:19:54,887 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b427278 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:19:54, skipping insertion in model container [2021-10-13 07:19:54,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:19:54" (3/3) ... [2021-10-13 07:19:54,889 INFO L111 eAbstractionObserver]: Analyzing ICFG derefAfterFree1.c [2021-10-13 07:19:54,894 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:19:54,895 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-13 07:19:54,992 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:19:54,999 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, mConcurrency=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 [2021-10-13 07:19:55,018 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-13 07:19:55,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 6 states have (on average 2.0) 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) [2021-10-13 07:19:55,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 07:19:55,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:55,048 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 07:19:55,049 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:19:55,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:55,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1522, now seen corresponding path program 1 times [2021-10-13 07:19:55,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:55,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839774966] [2021-10-13 07:19:55,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:55,088 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:55,279 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:55,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839774966] [2021-10-13 07:19:55,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839774966] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:55,282 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:55,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:19:55,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438363470] [2021-10-13 07:19:55,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:19:55,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:55,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:19:55,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:19:55,314 INFO L87 Difference]: Start difference. First operand has 13 states, 6 states have (on average 2.0) 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) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:55,340 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2021-10-13 07:19:55,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:19:55,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2021-10-13 07:19:55,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:55,358 INFO L225 Difference]: With dead ends: 12 [2021-10-13 07:19:55,358 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 07:19:55,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:19:55,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 07:19:55,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-13 07:19:55,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 10 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:55,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2021-10-13 07:19:55,393 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 2 [2021-10-13 07:19:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:55,394 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2021-10-13 07:19:55,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:55,395 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2021-10-13 07:19:55,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:19:55,395 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:55,395 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:19:55,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:19:55,396 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:19:55,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:55,400 INFO L82 PathProgramCache]: Analyzing trace with hash 47218, now seen corresponding path program 1 times [2021-10-13 07:19:55,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:55,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83488280] [2021-10-13 07:19:55,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:55,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:55,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:55,479 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:55,479 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83488280] [2021-10-13 07:19:55,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83488280] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:55,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:55,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:19:55,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374080820] [2021-10-13 07:19:55,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:19:55,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:55,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:19:55,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:19:55,487 INFO L87 Difference]: Start difference. First operand 11 states and 10 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2021-10-13 07:19:55,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:55,498 INFO L93 Difference]: Finished difference Result 10 states and 9 transitions. [2021-10-13 07:19:55,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:19:55,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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 [2021-10-13 07:19:55,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:55,500 INFO L225 Difference]: With dead ends: 10 [2021-10-13 07:19:55,500 INFO L226 Difference]: Without dead ends: 10 [2021-10-13 07:19:55,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:19:55,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-13 07:19:55,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-13 07:19:55,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 6 states have (on average 1.5) internal successors, (9), 9 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 9 transitions. [2021-10-13 07:19:55,503 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 9 transitions. Word has length 3 [2021-10-13 07:19:55,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:55,504 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 9 transitions. [2021-10-13 07:19:55,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 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) [2021-10-13 07:19:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 9 transitions. [2021-10-13 07:19:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:19:55,505 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:55,505 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:19:55,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:19:55,506 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:19:55,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:55,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1463796, now seen corresponding path program 1 times [2021-10-13 07:19:55,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:55,507 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126066622] [2021-10-13 07:19:55,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:55,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:19:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:19:55,533 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:19:55,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126066622] [2021-10-13 07:19:55,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126066622] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:19:55,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:19:55,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:19:55,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324107178] [2021-10-13 07:19:55,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:19:55,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:19:55,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:19:55,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:19:55,537 INFO L87 Difference]: Start difference. First operand 10 states and 9 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:19:55,546 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2021-10-13 07:19:55,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:19:55,547 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:19:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:19:55,548 INFO L225 Difference]: With dead ends: 9 [2021-10-13 07:19:55,548 INFO L226 Difference]: Without dead ends: 9 [2021-10-13 07:19:55,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:19:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-13 07:19:55,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-13 07:19:55,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 8 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:55,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8 transitions. [2021-10-13 07:19:55,551 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 8 transitions. Word has length 4 [2021-10-13 07:19:55,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:19:55,551 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 8 transitions. [2021-10-13 07:19:55,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:19:55,552 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 8 transitions. [2021-10-13 07:19:55,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:19:55,552 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:19:55,553 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:19:55,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:19:55,553 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:19:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:19:55,554 INFO L82 PathProgramCache]: Analyzing trace with hash 45377718, now seen corresponding path program 1 times [2021-10-13 07:19:55,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:19:55,555 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330387569] [2021-10-13 07:19:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:19:55,555 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:19:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:19:55,569 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:19:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:19:55,603 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-13 07:19:55,604 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:19:55,605 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-13 07:19:55,607 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:19:55,607 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:19:55,608 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:19:55,608 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-13 07:19:55,609 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:19:55,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:19:55,616 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:19:55,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:19:55 BoogieIcfgContainer [2021-10-13 07:19:55,640 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:19:55,641 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:19:55,642 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:19:55,642 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:19:55,642 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:19:54" (3/4) ... [2021-10-13 07:19:55,644 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:19:55,687 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:19:55,687 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:19:55,694 INFO L168 Benchmark]: Toolchain (without parser) took 1440.46 ms. Allocated memory was 94.4 MB in the beginning and 121.6 MB in the end (delta: 27.3 MB). Free memory was 59.9 MB in the beginning and 56.9 MB in the end (delta: 3.0 MB). Peak memory consumption was 28.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:55,695 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 94.4 MB. Free memory was 64.4 MB in the beginning and 64.4 MB in the end (delta: 27.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:19:55,696 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.54 ms. Allocated memory was 94.4 MB in the beginning and 121.6 MB in the end (delta: 27.3 MB). Free memory was 59.7 MB in the beginning and 98.8 MB in the end (delta: -39.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:55,697 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.70 ms. Allocated memory is still 121.6 MB. Free memory was 98.8 MB in the beginning and 97.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:19:55,698 INFO L168 Benchmark]: Boogie Preprocessor took 19.33 ms. Allocated memory is still 121.6 MB. Free memory was 97.6 MB in the beginning and 96.8 MB in the end (delta: 852.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:55,700 INFO L168 Benchmark]: RCFGBuilder took 318.15 ms. Allocated memory is still 121.6 MB. Free memory was 96.8 MB in the beginning and 86.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:55,700 INFO L168 Benchmark]: TraceAbstraction took 773.07 ms. Allocated memory is still 121.6 MB. Free memory was 86.3 MB in the beginning and 58.4 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:55,701 INFO L168 Benchmark]: Witness Printer took 45.82 ms. Allocated memory is still 121.6 MB. Free memory was 58.4 MB in the beginning and 56.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:19:55,707 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 94.4 MB. Free memory was 64.4 MB in the beginning and 64.4 MB in the end (delta: 27.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 242.54 ms. Allocated memory was 94.4 MB in the beginning and 121.6 MB in the end (delta: 27.3 MB). Free memory was 59.7 MB in the beginning and 98.8 MB in the end (delta: -39.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.70 ms. Allocated memory is still 121.6 MB. Free memory was 98.8 MB in the beginning and 97.6 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.33 ms. Allocated memory is still 121.6 MB. Free memory was 97.6 MB in the beginning and 96.8 MB in the end (delta: 852.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 318.15 ms. Allocated memory is still 121.6 MB. Free memory was 96.8 MB in the beginning and 86.8 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 773.07 ms. Allocated memory is still 121.6 MB. Free memory was 86.3 MB in the beginning and 58.4 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * Witness Printer took 45.82 ms. Allocated memory is still 121.6 MB. Free memory was 58.4 MB in the beginning and 56.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms 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)); [L6] free(p) [L6] free(p) [L6] free(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: 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 1 procedures, 13 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 640.0ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 19.9ms, AutomataDifference: 97.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 22 SDtfs, 17 SDslu, 1 SDs, 0 SdLazy, 10 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 22.1ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 19.0ms SsaConstructionTime, 61.9ms SatisfiabilityAnalysisTime, 138.2ms InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 28 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! [2021-10-13 07:19:55,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc2b33b8-2bea-4b3f-90e3-a8ace521922d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...