./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 6a47aea7 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl --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 a759f8d678ad469b9fde9b60c61d539be5ffd1b82a7250e29929fb245cee5670 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:44:49,229 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:44:49,231 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:44:49,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:44:49,283 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:44:49,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:44:49,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:44:49,293 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:44:49,296 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:44:49,302 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:44:49,303 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:44:49,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:44:49,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:44:49,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:44:49,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:44:49,315 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:44:49,317 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:44:49,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:44:49,321 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:44:49,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:44:49,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:44:49,333 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:44:49,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:44:49,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:44:49,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:44:49,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:44:49,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:44:49,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:44:49,350 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:44:49,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:44:49,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:44:49,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:44:49,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:44:49,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:44:49,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:44:49,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:44:49,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:44:49,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:44:49,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:44:49,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:44:49,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:44:49,365 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 16:44:49,421 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:44:49,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:44:49,422 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:44:49,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:44:49,424 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:44:49,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:44:49,424 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:44:49,425 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:44:49,425 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:44:49,425 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:44:49,426 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:44:49,426 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:44:49,427 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:44:49,427 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:44:49,427 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:44:49,427 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:44:49,428 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:44:49,428 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:44:49,429 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 16:44:49,429 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 16:44:49,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:44:49,430 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:44:49,430 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 16:44:49,431 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:44:49,432 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:44:49,432 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:44:49,432 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 16:44:49,433 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 16:44:49,433 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 16:44:49,433 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:44:49,433 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:44:49,434 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:44:49,434 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:44:49,434 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:44:49,434 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:44:49,435 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:44:49,435 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:44:49,435 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:44:49,435 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:44:49,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:44:49,436 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:44:49,436 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:44:49,436 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_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a759f8d678ad469b9fde9b60c61d539be5ffd1b82a7250e29929fb245cee5670 [2021-11-23 16:44:49,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:44:49,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:44:49,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:44:49,825 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:44:49,826 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:44:49,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2021-11-23 16:44:49,914 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/data/7d1df311a/ca4bccfe4feb43ce81f015c714341889/FLAG36e1b7b9d [2021-11-23 16:44:50,462 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:44:50,463 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/sv-benchmarks/c/memsafety-ext3/derefAfterFree1.c [2021-11-23 16:44:50,483 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/data/7d1df311a/ca4bccfe4feb43ce81f015c714341889/FLAG36e1b7b9d [2021-11-23 16:44:50,825 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/data/7d1df311a/ca4bccfe4feb43ce81f015c714341889 [2021-11-23 16:44:50,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:44:50,830 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:44:50,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:44:50,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:44:50,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:44:50,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,840 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d8016c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:50, skipping insertion in model container [2021-11-23 16:44:50,840 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:44:50" (1/1) ... [2021-11-23 16:44:50,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:44:50,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:44:51,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:44:51,063 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:44:51,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:44:51,088 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:44:51,088 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51 WrapperNode [2021-11-23 16:44:51,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:44:51,090 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:44:51,090 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:44:51,090 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:44:51,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,111 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,131 INFO L137 Inliner]: procedures = 10, calls = 6, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 17 [2021-11-23 16:44:51,131 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:44:51,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:44:51,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:44:51,133 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:44:51,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:44:51,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:44:51,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:44:51,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:44:51,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (1/1) ... [2021-11-23 16:44:51,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:44:51,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:44:51,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:44:51,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:44:51,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 16:44:51,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 16:44:51,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:44:51,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:44:51,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 16:44:51,318 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:44:51,320 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:44:51,423 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:44:51,438 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:44:51,439 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 16:44:51,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:44:51 BoogieIcfgContainer [2021-11-23 16:44:51,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:44:51,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:44:51,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:44:51,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:44:51,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:44:50" (1/3) ... [2021-11-23 16:44:51,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d41580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:44:51, skipping insertion in model container [2021-11-23 16:44:51,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:44:51" (2/3) ... [2021-11-23 16:44:51,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d41580 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:44:51, skipping insertion in model container [2021-11-23 16:44:51,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:44:51" (3/3) ... [2021-11-23 16:44:51,450 INFO L111 eAbstractionObserver]: Analyzing ICFG derefAfterFree1.c [2021-11-23 16:44:51,456 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:44:51,456 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-23 16:44:51,498 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:44:51,505 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 16:44:51,505 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-23 16:44:51,517 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) [2021-11-23 16:44:51,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-11-23 16:44:51,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:44:51,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1] [2021-11-23 16:44:51,525 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)] === [2021-11-23 16:44:51,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:44:51,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1584, now seen corresponding path program 1 times [2021-11-23 16:44:51,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:44:51,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791590334] [2021-11-23 16:44:51,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:44:51,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:44:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:44:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:44:51,799 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:44:51,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791590334] [2021-11-23 16:44:51,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791590334] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:44:51,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:44:51,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 16:44:51,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957948966] [2021-11-23 16:44:51,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:44:51,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:44:51,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:44:51,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:44:51,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:44:51,840 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) [2021-11-23 16:44:51,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:44:51,866 INFO L93 Difference]: Finished difference Result 12 states and 11 transitions. [2021-11-23 16:44:51,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:44:51,869 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 [2021-11-23 16:44:51,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:44:51,876 INFO L225 Difference]: With dead ends: 12 [2021-11-23 16:44:51,877 INFO L226 Difference]: Without dead ends: 11 [2021-11-23 16:44:51,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:44:51,883 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:44:51,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 6 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:44:51,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-11-23 16:44:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-11-23 16:44:51,916 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) [2021-11-23 16:44:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2021-11-23 16:44:51,917 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 2 [2021-11-23 16:44:51,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:44:51,918 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2021-11-23 16:44:51,918 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) [2021-11-23 16:44:51,918 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2021-11-23 16:44:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 16:44:51,919 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:44:51,919 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 16:44:51,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 16:44:51,920 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)] === [2021-11-23 16:44:51,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:44:51,921 INFO L85 PathProgramCache]: Analyzing trace with hash 49140, now seen corresponding path program 1 times [2021-11-23 16:44:51,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:44:51,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823048278] [2021-11-23 16:44:51,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:44:51,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:44:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:44:51,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:44:51,957 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:44:51,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823048278] [2021-11-23 16:44:51,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823048278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:44:51,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:44:51,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 16:44:51,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901672846] [2021-11-23 16:44:51,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:44:51,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:44:51,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:44:51,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:44:51,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:44:51,961 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) [2021-11-23 16:44:51,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:44:51,984 INFO L93 Difference]: Finished difference Result 10 states and 9 transitions. [2021-11-23 16:44:51,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:44:51,985 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 [2021-11-23 16:44:51,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:44:51,985 INFO L225 Difference]: With dead ends: 10 [2021-11-23 16:44:51,985 INFO L226 Difference]: Without dead ends: 10 [2021-11-23 16:44:51,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:44:51,988 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:44:51,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 4 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:44:51,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-23 16:44:51,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-11-23 16:44:51,992 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) [2021-11-23 16:44:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 9 transitions. [2021-11-23 16:44:51,992 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 9 transitions. Word has length 3 [2021-11-23 16:44:51,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:44:51,993 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 9 transitions. [2021-11-23 16:44:51,993 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) [2021-11-23 16:44:51,993 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 9 transitions. [2021-11-23 16:44:51,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 16:44:51,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:44:51,994 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 16:44:51,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 16:44:51,995 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)] === [2021-11-23 16:44:51,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:44:51,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1523378, now seen corresponding path program 1 times [2021-11-23 16:44:51,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:44:51,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444794706] [2021-11-23 16:44:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:44:51,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:44:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:44:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:44:52,037 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 16:44:52,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444794706] [2021-11-23 16:44:52,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444794706] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:44:52,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:44:52,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 16:44:52,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018672135] [2021-11-23 16:44:52,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:44:52,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:44:52,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 16:44:52,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:44:52,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:44:52,044 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) [2021-11-23 16:44:52,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:44:52,069 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2021-11-23 16:44:52,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:44:52,073 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 [2021-11-23 16:44:52,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:44:52,074 INFO L225 Difference]: With dead ends: 9 [2021-11-23 16:44:52,074 INFO L226 Difference]: Without dead ends: 9 [2021-11-23 16:44:52,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:44:52,077 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 16:44:52,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 16:44:52,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-11-23 16:44:52,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-11-23 16:44:52,083 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) [2021-11-23 16:44:52,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 8 transitions. [2021-11-23 16:44:52,084 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 8 transitions. Word has length 4 [2021-11-23 16:44:52,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:44:52,085 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 8 transitions. [2021-11-23 16:44:52,086 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) [2021-11-23 16:44:52,086 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 8 transitions. [2021-11-23 16:44:52,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 16:44:52,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:44:52,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 16:44:52,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 16:44:52,088 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-11-23 16:44:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:44:52,090 INFO L85 PathProgramCache]: Analyzing trace with hash 47225102, now seen corresponding path program 1 times [2021-11-23 16:44:52,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 16:44:52,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329780237] [2021-11-23 16:44:52,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:44:52,091 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 16:44:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 16:44:52,117 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 16:44:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 16:44:52,164 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 16:44:52,165 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 16:44:52,166 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (5 of 6 remaining) [2021-11-23 16:44:52,168 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_FREE (4 of 6 remaining) [2021-11-23 16:44:52,168 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_FREE (3 of 6 remaining) [2021-11-23 16:44:52,168 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (2 of 6 remaining) [2021-11-23 16:44:52,169 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (1 of 6 remaining) [2021-11-23 16:44:52,169 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 6 remaining) [2021-11-23 16:44:52,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 16:44:52,177 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-23 16:44:52,182 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 16:44:52,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 04:44:52 BoogieIcfgContainer [2021-11-23 16:44:52,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 16:44:52,225 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 16:44:52,225 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 16:44:52,225 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 16:44:52,226 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:44:51" (3/4) ... [2021-11-23 16:44:52,228 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-23 16:44:52,272 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/witness.graphml [2021-11-23 16:44:52,272 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 16:44:52,273 INFO L158 Benchmark]: Toolchain (without parser) took 1443.13ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 49.9MB in the beginning and 41.2MB in the end (delta: 8.7MB). Peak memory consumption was 26.9MB. Max. memory is 16.1GB. [2021-11-23 16:44:52,273 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 88.1MB. Free memory was 66.0MB in the beginning and 66.0MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:44:52,274 INFO L158 Benchmark]: CACSL2BoogieTranslator took 254.03ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 49.6MB in the beginning and 86.6MB in the end (delta: -37.0MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. [2021-11-23 16:44:52,274 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.09ms. Allocated memory is still 109.1MB. Free memory was 86.6MB in the beginning and 85.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:44:52,275 INFO L158 Benchmark]: Boogie Preprocessor took 25.24ms. Allocated memory is still 109.1MB. Free memory was 85.3MB in the beginning and 84.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 16:44:52,287 INFO L158 Benchmark]: RCFGBuilder took 283.55ms. Allocated memory is still 109.1MB. Free memory was 84.2MB in the beginning and 74.7MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 16:44:52,288 INFO L158 Benchmark]: TraceAbstraction took 780.90ms. Allocated memory is still 109.1MB. Free memory was 74.1MB in the beginning and 42.9MB in the end (delta: 31.1MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2021-11-23 16:44:52,289 INFO L158 Benchmark]: Witness Printer took 47.36ms. Allocated memory is still 109.1MB. Free memory was 42.6MB in the beginning and 41.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:44:52,292 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 88.1MB. Free memory was 66.0MB in the beginning and 66.0MB in the end (delta: 46.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 254.03ms. Allocated memory was 88.1MB in the beginning and 109.1MB in the end (delta: 21.0MB). Free memory was 49.6MB in the beginning and 86.6MB in the end (delta: -37.0MB). Peak memory consumption was 5.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 42.09ms. Allocated memory is still 109.1MB. Free memory was 86.6MB in the beginning and 85.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 25.24ms. Allocated memory is still 109.1MB. Free memory was 85.3MB in the beginning and 84.2MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 283.55ms. Allocated memory is still 109.1MB. Free memory was 84.2MB in the beginning and 74.7MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 780.90ms. Allocated memory is still 109.1MB. Free memory was 74.1MB in the beginning and 42.9MB in the end (delta: 31.1MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Witness Printer took 47.36ms. Allocated memory is still 109.1MB. Free memory was 42.6MB in the beginning and 41.2MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L10] int* p = malloc(10 * sizeof(int)); [L12] CALL freePointer(p) [L6] free(p) VAL [p={-1:0}, p={-1:0}] [L6] free(p) VAL [p={-1:0}, p={-1:0}] [L6] free(p) [L12] RET freePointer(p) [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: 0.7s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 17 mSDsluCounter, 15 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18 IncrementalHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 14 mSDtfsCounter, 18 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 34 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-23 16:44:52,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0c2a2d4e-ff2d-40c1-b457-f9b4fe822c0a/bin/utaipan-fb15Y9Yzbl/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)