./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/dancing.i --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_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/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_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/dancing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/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_4d3cfc37-24fb-4dd7-923e-9c686f41035a/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 c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:07:10,096 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:07:10,098 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:07:10,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:07:10,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:07:10,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:07:10,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:07:10,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:07:10,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:07:10,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:07:10,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:07:10,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:07:10,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:07:10,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:07:10,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:07:10,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:07:10,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:07:10,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:07:10,160 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:07:10,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:07:10,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:07:10,167 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:07:10,168 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:07:10,169 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:07:10,173 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:07:10,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:07:10,174 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:07:10,181 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:07:10,182 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:07:10,183 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:07:10,184 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:07:10,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:07:10,186 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:07:10,187 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:07:10,188 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:07:10,188 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:07:10,189 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:07:10,190 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:07:10,190 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:07:10,191 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:07:10,192 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:07:10,193 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 17:07:10,244 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:07:10,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:07:10,245 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:07:10,245 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:07:10,246 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:07:10,246 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:07:10,246 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:07:10,247 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:07:10,247 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:07:10,247 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:07:10,247 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:07:10,248 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:07:10,248 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:07:10,248 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:07:10,248 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:07:10,249 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:07:10,249 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:07:10,249 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:07:10,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 17:07:10,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 17:07:10,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:07:10,251 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:07:10,251 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 17:07:10,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:07:10,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:07:10,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:07:10,252 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 17:07:10,252 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 17:07:10,252 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 17:07:10,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:07:10,253 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:07:10,253 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:07:10,253 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:07:10,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:07:10,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:07:10,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:07:10,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:07:10,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:07:10,255 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:07:10,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:07:10,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:07:10,255 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:07:10,256 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_4d3cfc37-24fb-4dd7-923e-9c686f41035a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a [2021-11-23 17:07:10,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:07:10,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:07:10,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:07:10,557 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:07:10,558 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:07:10,559 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/heap-manipulation/dancing.i [2021-11-23 17:07:10,665 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/data/0874df53e/af8d13d379094e55b037ca5f00058feb/FLAG096fafabc [2021-11-23 17:07:11,203 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:07:11,204 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/sv-benchmarks/c/heap-manipulation/dancing.i [2021-11-23 17:07:11,234 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/data/0874df53e/af8d13d379094e55b037ca5f00058feb/FLAG096fafabc [2021-11-23 17:07:11,518 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/data/0874df53e/af8d13d379094e55b037ca5f00058feb [2021-11-23 17:07:11,521 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:07:11,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:07:11,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:07:11,524 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:07:11,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:07:11,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:07:11" (1/1) ... [2021-11-23 17:07:11,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57b65785 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:11, skipping insertion in model container [2021-11-23 17:07:11,531 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:07:11" (1/1) ... [2021-11-23 17:07:11,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:07:11,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:07:11,805 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-11-23 17:07:12,007 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:07:12,023 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:07:12,037 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-11-23 17:07:12,073 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:07:12,102 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:07:12,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12 WrapperNode [2021-11-23 17:07:12,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:07:12,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:07:12,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:07:12,104 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:07:12,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,145 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,184 INFO L137 Inliner]: procedures = 124, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 90 [2021-11-23 17:07:12,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:07:12,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:07:12,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:07:12,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:07:12,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,207 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,208 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,237 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:07:12,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:07:12,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:07:12,243 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:07:12,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:12" (1/1) ... [2021-11-23 17:07:12,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:07:12,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:07:12,289 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:07:12,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:07:12,339 INFO L130 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2021-11-23 17:07:12,339 INFO L138 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2021-11-23 17:07:12,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 17:07:12,339 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 17:07:12,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:07:12,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:07:12,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:07:12,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 17:07:12,341 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 17:07:12,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:07:12,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:07:12,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:07:12,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:07:12,439 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:07:12,441 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:07:12,829 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:07:12,897 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:07:12,906 INFO L158 Benchmark]: Toolchain (without parser) took 1382.48ms. Allocated memory was 102.8MB in the beginning and 148.9MB in the end (delta: 46.1MB). Free memory was 66.1MB in the beginning and 123.9MB in the end (delta: -57.8MB). Peak memory consumption was 21.6MB. Max. memory is 16.1GB. [2021-11-23 17:07:12,907 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 102.8MB. Free memory was 73.9MB in the beginning and 73.9MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:07:12,908 INFO L158 Benchmark]: CACSL2BoogieTranslator took 578.55ms. Allocated memory is still 102.8MB. Free memory was 66.1MB in the beginning and 70.3MB in the end (delta: -4.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-23 17:07:12,909 INFO L158 Benchmark]: Boogie Procedure Inliner took 81.10ms. Allocated memory is still 102.8MB. Free memory was 70.3MB in the beginning and 68.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:07:12,910 INFO L158 Benchmark]: Boogie Preprocessor took 56.66ms. Allocated memory is still 102.8MB. Free memory was 68.2MB in the beginning and 66.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:07:12,911 INFO L158 Benchmark]: RCFGBuilder took 661.41ms. Allocated memory was 102.8MB in the beginning and 148.9MB in the end (delta: 46.1MB). Free memory was 66.4MB in the beginning and 123.9MB in the end (delta: -57.5MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. [2021-11-23 17:07:12,915 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 102.8MB. Free memory was 73.9MB in the beginning and 73.9MB in the end (delta: 21.3kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 578.55ms. Allocated memory is still 102.8MB. Free memory was 66.1MB in the beginning and 70.3MB in the end (delta: -4.1MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 81.10ms. Allocated memory is still 102.8MB. Free memory was 70.3MB in the beginning and 68.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 56.66ms. Allocated memory is still 102.8MB. Free memory was 68.2MB in the beginning and 66.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 661.41ms. Allocated memory was 102.8MB in the beginning and 148.9MB in the end (delta: 46.1MB). Free memory was 66.4MB in the beginning and 123.9MB in the end (delta: -57.5MB). Peak memory consumption was 24.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:07:12,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/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_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/dancing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/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 c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:07:15,493 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:07:15,495 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:07:15,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:07:15,532 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:07:15,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:07:15,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:07:15,546 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:07:15,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:07:15,557 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:07:15,559 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:07:15,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:07:15,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:07:15,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:07:15,567 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:07:15,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:07:15,572 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:07:15,573 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:07:15,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:07:15,592 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:07:15,595 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:07:15,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:07:15,600 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:07:15,601 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:07:15,612 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:07:15,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:07:15,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:07:15,616 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:07:15,617 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:07:15,618 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:07:15,618 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:07:15,619 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:07:15,621 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:07:15,622 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:07:15,623 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:07:15,624 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:07:15,625 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:07:15,625 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:07:15,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:07:15,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:07:15,628 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:07:15,633 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 17:07:15,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:07:15,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:07:15,679 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:07:15,679 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:07:15,680 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:07:15,680 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:07:15,681 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:07:15,681 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:07:15,682 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:07:15,682 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:07:15,683 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:07:15,683 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:07:15,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 17:07:15,685 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 17:07:15,685 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:07:15,686 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:07:15,686 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 17:07:15,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:07:15,686 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:07:15,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:07:15,687 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 17:07:15,687 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 17:07:15,687 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 17:07:15,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:07:15,688 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:07:15,688 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:07:15,688 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:07:15,688 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:07:15,688 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:07:15,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:07:15,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:07:15,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:07:15,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:07:15,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:07:15,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:07:15,691 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:07:15,691 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:07:15,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:07:15,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:07:15,692 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_4d3cfc37-24fb-4dd7-923e-9c686f41035a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2e0266b63b958a771d0226973905d5a39a7a28d05d194ae66381394d9ab520a [2021-11-23 17:07:16,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:07:16,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:07:16,095 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:07:16,097 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:07:16,098 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:07:16,099 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/heap-manipulation/dancing.i [2021-11-23 17:07:16,184 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/data/014250eae/2329fd1787d64ae18e37dae4ea24f581/FLAG4d7f01861 [2021-11-23 17:07:16,846 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:07:16,847 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/sv-benchmarks/c/heap-manipulation/dancing.i [2021-11-23 17:07:16,863 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/data/014250eae/2329fd1787d64ae18e37dae4ea24f581/FLAG4d7f01861 [2021-11-23 17:07:17,092 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/data/014250eae/2329fd1787d64ae18e37dae4ea24f581 [2021-11-23 17:07:17,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:07:17,096 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:07:17,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:07:17,097 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:07:17,108 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:07:17,109 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:07:17" (1/1) ... [2021-11-23 17:07:17,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2374407e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:17, skipping insertion in model container [2021-11-23 17:07:17,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:07:17" (1/1) ... [2021-11-23 17:07:17,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:07:17,170 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:07:17,344 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-11-23 17:07:17,490 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:07:17,511 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:07:17,535 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/sv-benchmarks/c/heap-manipulation/dancing.i[938,951] [2021-11-23 17:07:17,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:07:17,642 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:07:17,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:17 WrapperNode [2021-11-23 17:07:17,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:07:17,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:07:17,644 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:07:17,644 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:07:17,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:17" (1/1) ... [2021-11-23 17:07:17,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:17" (1/1) ... [2021-11-23 17:07:17,698 INFO L137 Inliner]: procedures = 125, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 91 [2021-11-23 17:07:17,699 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:07:17,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:07:17,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:07:17,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:07:17,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:17" (1/1) ... [2021-11-23 17:07:17,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:17" (1/1) ... [2021-11-23 17:07:17,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:17" (1/1) ... [2021-11-23 17:07:17,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:17" (1/1) ... [2021-11-23 17:07:17,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:17" (1/1) ... [2021-11-23 17:07:17,742 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:17" (1/1) ... [2021-11-23 17:07:17,745 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:17" (1/1) ... [2021-11-23 17:07:17,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:07:17,750 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:07:17,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:07:17,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:07:17,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:17" (1/1) ... [2021-11-23 17:07:17,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:07:17,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:07:17,793 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:07:17,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:07:17,845 INFO L130 BoogieDeclarations]: Found specification of procedure is_list_containing_x [2021-11-23 17:07:17,846 INFO L138 BoogieDeclarations]: Found implementation of procedure is_list_containing_x [2021-11-23 17:07:17,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-11-23 17:07:17,847 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-11-23 17:07:17,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 17:07:17,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:07:17,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 17:07:17,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 17:07:17,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 17:07:17,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 17:07:17,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:07:17,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:07:17,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:07:17,957 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:07:17,958 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:07:18,585 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:07:18,593 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:07:18,593 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:07:18,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:07:18 BoogieIcfgContainer [2021-11-23 17:07:18,596 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:07:18,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:07:18,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:07:18,601 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:07:18,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:07:17" (1/3) ... [2021-11-23 17:07:18,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b55c8f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:07:18, skipping insertion in model container [2021-11-23 17:07:18,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:07:17" (2/3) ... [2021-11-23 17:07:18,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b55c8f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:07:18, skipping insertion in model container [2021-11-23 17:07:18,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:07:18" (3/3) ... [2021-11-23 17:07:18,604 INFO L111 eAbstractionObserver]: Analyzing ICFG dancing.i [2021-11-23 17:07:18,610 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:07:18,610 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2021-11-23 17:07:18,679 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:07:18,692 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 17:07:18,692 INFO L340 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2021-11-23 17:07:18,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 55 states have (on average 2.036363636363636) internal successors, (112), 99 states have internal predecessors, (112), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 17:07:18,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 17:07:18,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:07:18,729 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 17:07:18,730 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 17:07:18,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:07:18,737 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2021-11-23 17:07:18,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:07:18,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [711865982] [2021-11-23 17:07:18,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:07:18,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:07:18,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:07:18,770 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:07:18,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:07:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:07:18,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:07:18,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:07:18,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:07:18,984 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 17:07:18,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:07:18,985 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:07:18,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [711865982] [2021-11-23 17:07:18,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [711865982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:07:18,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:07:18,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:07:18,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454933632] [2021-11-23 17:07:18,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:07:18,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:07:18,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:07:19,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:07:19,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:07:19,028 INFO L87 Difference]: Start difference. First operand has 108 states, 55 states have (on average 2.036363636363636) internal successors, (112), 99 states have internal predecessors, (112), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:19,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:07:19,267 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2021-11-23 17:07:19,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:07:19,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-23 17:07:19,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:07:19,280 INFO L225 Difference]: With dead ends: 106 [2021-11-23 17:07:19,280 INFO L226 Difference]: Without dead ends: 104 [2021-11-23 17:07:19,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:07:19,285 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 82 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:07:19,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 94 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 17:07:19,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-23 17:07:19,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-11-23 17:07:19,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 95 states have internal predecessors, (105), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 17:07:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-11-23 17:07:19,338 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 3 [2021-11-23 17:07:19,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:07:19,338 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-11-23 17:07:19,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:19,339 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-11-23 17:07:19,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 17:07:19,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:07:19,340 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 17:07:19,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:07:19,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:07:19,548 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 17:07:19,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:07:19,549 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2021-11-23 17:07:19,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:07:19,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1437117264] [2021-11-23 17:07:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:07:19,550 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:07:19,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:07:19,554 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:07:19,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:07:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:07:19,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:07:19,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:07:19,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:07:19,678 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 17:07:19,678 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:07:19,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:07:19,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1437117264] [2021-11-23 17:07:19,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1437117264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:07:19,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:07:19,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:07:19,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928418284] [2021-11-23 17:07:19,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:07:19,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:07:19,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:07:19,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:07:19,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:07:19,690 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:19,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:07:19,999 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2021-11-23 17:07:20,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:07:20,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-23 17:07:20,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:07:20,002 INFO L225 Difference]: With dead ends: 102 [2021-11-23 17:07:20,003 INFO L226 Difference]: Without dead ends: 102 [2021-11-23 17:07:20,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:07:20,004 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 80 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:07:20,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 92 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:07:20,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-23 17:07:20,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-11-23 17:07:20,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 93 states have internal predecessors, (103), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 17:07:20,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2021-11-23 17:07:20,030 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 3 [2021-11-23 17:07:20,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:07:20,032 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2021-11-23 17:07:20,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:07:20,033 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2021-11-23 17:07:20,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 17:07:20,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:07:20,034 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:07:20,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:07:20,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:07:20,247 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 17:07:20,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:07:20,248 INFO L85 PathProgramCache]: Analyzing trace with hash 59267633, now seen corresponding path program 1 times [2021-11-23 17:07:20,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:07:20,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1451059571] [2021-11-23 17:07:20,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:07:20,253 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:07:20,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:07:20,254 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:07:20,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:07:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:07:20,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:07:20,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:07:20,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:07:20,407 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 17:07:20,407 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:07:20,408 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:07:20,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1451059571] [2021-11-23 17:07:20,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1451059571] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:07:20,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:07:20,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:07:20,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539725583] [2021-11-23 17:07:20,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:07:20,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:07:20,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:07:20,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:07:20,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:07:20,416 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 17:07:20,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:07:20,752 INFO L93 Difference]: Finished difference Result 165 states and 189 transitions. [2021-11-23 17:07:20,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:07:20,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) Word has length 8 [2021-11-23 17:07:20,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:07:20,755 INFO L225 Difference]: With dead ends: 165 [2021-11-23 17:07:20,755 INFO L226 Difference]: Without dead ends: 165 [2021-11-23 17:07:20,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 1 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 17:07:20,756 INFO L933 BasicCegarLoop]: 150 mSDtfsCounter, 74 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:07:20,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 213 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 17:07:20,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-23 17:07:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 100. [2021-11-23 17:07:20,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 54 states have (on average 1.8703703703703705) internal successors, (101), 91 states have internal predecessors, (101), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 17:07:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2021-11-23 17:07:20,784 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 8 [2021-11-23 17:07:20,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:07:20,786 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2021-11-23 17:07:20,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 17:07:20,787 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2021-11-23 17:07:20,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 17:07:20,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:07:20,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:07:20,803 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:07:20,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:07:21,000 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 17:07:21,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:07:21,000 INFO L85 PathProgramCache]: Analyzing trace with hash 59267634, now seen corresponding path program 1 times [2021-11-23 17:07:21,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:07:21,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375013032] [2021-11-23 17:07:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:07:21,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:07:21,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:07:21,002 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:07:21,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:07:21,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:07:21,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:07:21,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:07:21,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 17:07:21,132 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 17:07:21,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:07:21,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:07:21,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375013032] [2021-11-23 17:07:21,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375013032] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:07:21,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:07:21,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:07:21,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991800223] [2021-11-23 17:07:21,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:07:21,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:07:21,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:07:21,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:07:21,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:07:21,137 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 17:07:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:07:21,561 INFO L93 Difference]: Finished difference Result 165 states and 188 transitions. [2021-11-23 17:07:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:07:21,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) Word has length 8 [2021-11-23 17:07:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:07:21,564 INFO L225 Difference]: With dead ends: 165 [2021-11-23 17:07:21,564 INFO L226 Difference]: Without dead ends: 165 [2021-11-23 17:07:21,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 17:07:21,566 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 74 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:07:21,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 217 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 17:07:21,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-23 17:07:21,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 98. [2021-11-23 17:07:21,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 54 states have (on average 1.8333333333333333) internal successors, (99), 89 states have internal predecessors, (99), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 17:07:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 111 transitions. [2021-11-23 17:07:21,584 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 111 transitions. Word has length 8 [2021-11-23 17:07:21,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:07:21,584 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 111 transitions. [2021-11-23 17:07:21,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 17:07:21,585 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 111 transitions. [2021-11-23 17:07:21,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 17:07:21,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:07:21,588 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:07:21,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:07:21,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:07:21,789 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting is_list_containing_xErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 40 more)] === [2021-11-23 17:07:21,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:07:21,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1124238034, now seen corresponding path program 1 times [2021-11-23 17:07:21,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:07:21,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [202112035] [2021-11-23 17:07:21,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:07:21,790 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:07:21,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:07:21,793 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:07:21,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:07:21,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:07:22,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:07:22,027 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.UnmodifiableTransFormula.removeSuperfluousVars(UnmodifiableTransFormula.java:212) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.finishConstruction(TransFormulaBuilder.java:273) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.constructGlobalVarsAssignment(OldVarsAssignmentCache.java:155) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.OldVarsAssignmentCache.getGlobalVarsAssignment(OldVarsAssignmentCache.java:93) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:89) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.DefaultTransFormulas.getGlobalVarAssignmentFromValidPos(DefaultTransFormulas.java:1) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedFormulas.getGlobalVarAssignment(NestedFormulas.java:126) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckUtils.decoupleArrayValues(TraceCheckUtils.java:384) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:87) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:07:22,031 INFO L158 Benchmark]: Toolchain (without parser) took 4934.60ms. Allocated memory was 62.9MB in the beginning and 90.2MB in the end (delta: 27.3MB). Free memory was 41.1MB in the beginning and 62.4MB in the end (delta: -21.3MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2021-11-23 17:07:22,031 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 62.9MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:07:22,031 INFO L158 Benchmark]: CACSL2BoogieTranslator took 546.22ms. Allocated memory is still 62.9MB. Free memory was 40.8MB in the beginning and 37.9MB in the end (delta: 3.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:07:22,032 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.83ms. Allocated memory is still 62.9MB. Free memory was 37.6MB in the beginning and 35.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:07:22,032 INFO L158 Benchmark]: Boogie Preprocessor took 49.92ms. Allocated memory is still 62.9MB. Free memory was 35.5MB in the beginning and 33.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 17:07:22,033 INFO L158 Benchmark]: RCFGBuilder took 845.71ms. Allocated memory is still 62.9MB. Free memory was 33.6MB in the beginning and 31.9MB in the end (delta: 1.7MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. [2021-11-23 17:07:22,033 INFO L158 Benchmark]: TraceAbstraction took 3431.95ms. Allocated memory was 62.9MB in the beginning and 90.2MB in the end (delta: 27.3MB). Free memory was 31.3MB in the beginning and 62.4MB in the end (delta: -31.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:07:22,036 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 62.9MB. Free memory is still 42.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 546.22ms. Allocated memory is still 62.9MB. Free memory was 40.8MB in the beginning and 37.9MB in the end (delta: 3.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.83ms. Allocated memory is still 62.9MB. Free memory was 37.6MB in the beginning and 35.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.92ms. Allocated memory is still 62.9MB. Free memory was 35.5MB in the beginning and 33.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 845.71ms. Allocated memory is still 62.9MB. Free memory was 33.6MB in the beginning and 31.9MB in the end (delta: 1.7MB). Peak memory consumption was 13.2MB. Max. memory is 16.1GB. * TraceAbstraction took 3431.95ms. Allocated memory was 62.9MB in the beginning and 90.2MB in the end (delta: 27.3MB). Free memory was 31.3MB in the beginning and 62.4MB in the end (delta: -31.1MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.retainAll(ImmutableSet.java:338) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:07:22,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4d3cfc37-24fb-4dd7-923e-9c686f41035a/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 Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable