./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs --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 aa3ae4378a5284e50be7191d52900376e96b0fdc ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 03:19:47,322 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 03:19:47,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 03:19:47,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 03:19:47,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 03:19:47,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 03:19:47,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 03:19:47,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 03:19:47,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 03:19:47,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 03:19:47,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 03:19:47,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 03:19:47,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 03:19:47,385 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 03:19:47,386 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 03:19:47,388 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 03:19:47,389 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 03:19:47,390 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 03:19:47,392 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 03:19:47,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 03:19:47,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 03:19:47,398 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 03:19:47,399 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 03:19:47,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 03:19:47,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 03:19:47,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 03:19:47,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 03:19:47,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 03:19:47,407 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 03:19:47,408 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 03:19:47,409 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 03:19:47,410 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 03:19:47,411 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 03:19:47,412 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 03:19:47,413 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 03:19:47,413 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 03:19:47,414 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 03:19:47,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 03:19:47,415 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 03:19:47,416 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 03:19:47,417 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 03:19:47,418 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-16 03:19:47,455 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 03:19:47,456 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 03:19:47,457 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 03:19:47,463 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 03:19:47,464 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 03:19:47,464 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 03:19:47,464 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 03:19:47,465 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 03:19:47,465 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 03:19:47,465 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 03:19:47,466 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 03:19:47,466 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 03:19:47,467 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 03:19:47,467 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 03:19:47,467 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 03:19:47,468 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-16 03:19:47,468 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-16 03:19:47,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 03:19:47,469 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 03:19:47,469 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-16 03:19:47,469 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 03:19:47,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 03:19:47,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 03:19:47,470 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-16 03:19:47,470 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-16 03:19:47,470 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-16 03:19:47,471 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 03:19:47,471 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 03:19:47,471 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 03:19:47,471 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 03:19:47,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 03:19:47,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 03:19:47,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:19:47,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 03:19:47,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 03:19:47,473 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 03:19:47,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 03:19:47,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 03:19:47,474 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 03:19:47,474 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_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aa3ae4378a5284e50be7191d52900376e96b0fdc [2021-10-16 03:19:47,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 03:19:47,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 03:19:47,790 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 03:19:47,791 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 03:19:47,792 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 03:19:47,793 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/memsafety-ext3/derefInLoop1.c [2021-10-16 03:19:47,864 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/data/429784238/2d66b6e2304b4c19a7d1098a57844167/FLAG6c2c211e1 [2021-10-16 03:19:48,322 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 03:19:48,322 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/sv-benchmarks/c/memsafety-ext3/derefInLoop1.c [2021-10-16 03:19:48,329 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/data/429784238/2d66b6e2304b4c19a7d1098a57844167/FLAG6c2c211e1 [2021-10-16 03:19:48,711 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/data/429784238/2d66b6e2304b4c19a7d1098a57844167 [2021-10-16 03:19:48,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 03:19:48,716 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 03:19:48,718 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 03:19:48,718 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 03:19:48,729 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 03:19:48,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:19:48" (1/1) ... [2021-10-16 03:19:48,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d8e7ff7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:48, skipping insertion in model container [2021-10-16 03:19:48,737 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 03:19:48" (1/1) ... [2021-10-16 03:19:48,746 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 03:19:48,757 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 03:19:48,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:19:48,899 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 03:19:48,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 03:19:48,944 INFO L208 MainTranslator]: Completed translation [2021-10-16 03:19:48,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:48 WrapperNode [2021-10-16 03:19:48,945 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 03:19:48,946 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 03:19:48,946 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 03:19:48,946 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 03:19:48,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:48" (1/1) ... [2021-10-16 03:19:48,965 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:48" (1/1) ... [2021-10-16 03:19:48,978 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 03:19:48,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 03:19:48,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 03:19:48,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 03:19:48,987 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:48" (1/1) ... [2021-10-16 03:19:48,987 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:48" (1/1) ... [2021-10-16 03:19:48,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:48" (1/1) ... [2021-10-16 03:19:48,989 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:48" (1/1) ... [2021-10-16 03:19:48,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:48" (1/1) ... [2021-10-16 03:19:48,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:48" (1/1) ... [2021-10-16 03:19:48,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:48" (1/1) ... [2021-10-16 03:19:48,999 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 03:19:49,000 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 03:19:49,000 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 03:19:49,001 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 03:19:49,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:48" (1/1) ... [2021-10-16 03:19:49,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 03:19:49,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:19:49,035 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 03:19:49,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 03:19:49,077 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 03:19:49,077 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 03:19:49,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 03:19:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 03:19:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 03:19:49,264 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 03:19:49,264 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-16 03:19:49,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:19:49 BoogieIcfgContainer [2021-10-16 03:19:49,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 03:19:49,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 03:19:49,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 03:19:49,272 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 03:19:49,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 03:19:48" (1/3) ... [2021-10-16 03:19:49,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d5c19f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:19:49, skipping insertion in model container [2021-10-16 03:19:49,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 03:19:48" (2/3) ... [2021-10-16 03:19:49,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d5c19f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 03:19:49, skipping insertion in model container [2021-10-16 03:19:49,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:19:49" (3/3) ... [2021-10-16 03:19:49,276 INFO L111 eAbstractionObserver]: Analyzing ICFG derefInLoop1.c [2021-10-16 03:19:49,287 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 03:19:49,287 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-16 03:19:49,362 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 03:19:49,369 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 03:19:49,369 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-16 03:19:49,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-16 03:19:49,408 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:19:49,409 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-16 03:19:49,409 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-16 03:19:49,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:19:49,415 INFO L82 PathProgramCache]: Analyzing trace with hash 58678, now seen corresponding path program 1 times [2021-10-16 03:19:49,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:19:49,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043453318] [2021-10-16 03:19:49,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:19:49,426 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:19:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:19:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:49,566 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:19:49,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043453318] [2021-10-16 03:19:49,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043453318] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:19:49,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:19:49,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:19:49,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3704699] [2021-10-16 03:19:49,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:19:49,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:19:49,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:19:49,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:19:49,593 INFO L87 Difference]: Start difference. First operand has 10 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:49,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:19:49,633 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-10-16 03:19:49,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:19:49,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-10-16 03:19:49,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:19:49,642 INFO L225 Difference]: With dead ends: 16 [2021-10-16 03:19:49,643 INFO L226 Difference]: Without dead ends: 15 [2021-10-16 03:19:49,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:19:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-16 03:19:49,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2021-10-16 03:19:49,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:49,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-16 03:19:49,667 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 3 [2021-10-16 03:19:49,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:19:49,668 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-16 03:19:49,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:49,668 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-16 03:19:49,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 03:19:49,669 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:19:49,669 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 03:19:49,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 03:19:49,669 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-16 03:19:49,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:19:49,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1797552, now seen corresponding path program 1 times [2021-10-16 03:19:49,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:19:49,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328755264] [2021-10-16 03:19:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:19:49,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:19:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:19:49,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:49,701 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:19:49,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328755264] [2021-10-16 03:19:49,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328755264] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:19:49,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 03:19:49,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-16 03:19:49,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79986890] [2021-10-16 03:19:49,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-16 03:19:49,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:19:49,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-16 03:19:49,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:19:49,706 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:49,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:19:49,720 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-16 03:19:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 03:19:49,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-16 03:19:49,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:19:49,721 INFO L225 Difference]: With dead ends: 12 [2021-10-16 03:19:49,721 INFO L226 Difference]: Without dead ends: 12 [2021-10-16 03:19:49,722 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-16 03:19:49,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-16 03:19:49,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-16 03:19:49,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 8 states have (on average 1.5) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:49,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-16 03:19:49,725 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 4 [2021-10-16 03:19:49,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:19:49,725 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-16 03:19:49,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:49,726 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-16 03:19:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 03:19:49,726 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:19:49,727 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 03:19:49,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-16 03:19:49,727 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-16 03:19:49,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:19:49,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1727391791, now seen corresponding path program 1 times [2021-10-16 03:19:49,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:19:49,729 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299020888] [2021-10-16 03:19:49,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:19:49,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:19:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:19:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:49,777 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 03:19:49,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299020888] [2021-10-16 03:19:49,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299020888] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 03:19:49,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982518330] [2021-10-16 03:19:49,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:19:49,779 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:19:49,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 03:19:49,781 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 03:19:49,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 03:19:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 03:19:49,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 03:19:49,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 03:19:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:49,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 03:19:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 03:19:49,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982518330] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 03:19:49,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79632926] [2021-10-16 03:19:49,975 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-16 03:19:49,975 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 03:19:49,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 03:19:49,987 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 03:19:49,987 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 03:19:50,019 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,024 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:19:50,025 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,026 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-16 03:19:50,028 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 23 [2021-10-16 03:19:50,070 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 [2021-10-16 03:19:50,071 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,072 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-16 03:19:50,073 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,079 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-16 03:19:50,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 03:19:50,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,100 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,104 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-10-16 03:19:50,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 03:19:50,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:21 [2021-10-16 03:19:50,122 INFO L180 QuantifierPusher]: treesize reduction 3, result has 94.2 percent of original size [2021-10-16 03:19:50,125 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:19:50,126 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,127 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-16 03:19:50,135 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-10-16 03:19:50,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-10-16 03:19:50,154 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,155 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-16 03:19:50,155 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-16 03:19:50,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 03:19:50,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,169 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,171 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-16 03:19:50,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 03:19:50,172 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:44 [2021-10-16 03:19:50,178 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,185 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-10-16 03:19:50,190 INFO L180 QuantifierPusher]: treesize reduction 3, result has 96.0 percent of original size [2021-10-16 03:19:50,198 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:19:50,200 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,211 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 03:19:50,216 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-10-16 03:19:50,256 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 03:19:50,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-16 03:19:50,259 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,261 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-16 03:19:50,262 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,263 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-16 03:19:50,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 03:19:50,266 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,293 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,295 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-10-16 03:19:50,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 03:19:50,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:70 [2021-10-16 03:19:50,300 INFO L180 QuantifierPusher]: treesize reduction 79, result has 1.3 percent of original size [2021-10-16 03:19:50,307 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 03:19:50,311 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,321 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 46 [2021-10-16 03:19:50,324 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,445 INFO L180 QuantifierPusher]: treesize reduction 5, result has 93.5 percent of original size [2021-10-16 03:19:50,448 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 03:19:50,449 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,449 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 03:19:50,452 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-10-16 03:19:50,473 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-10-16 03:19:50,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-10-16 03:19:50,475 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,477 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-16 03:19:50,478 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,478 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-10-16 03:19:50,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 03:19:50,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,484 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 03:19:50,486 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-10-16 03:19:50,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 03:19:50,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:71, output treesize:70 [2021-10-16 03:19:50,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 03:19:50,523 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-16 03:19:50,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [79632926] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 03:19:50,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-16 03:19:50,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 6 [2021-10-16 03:19:50,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191256749] [2021-10-16 03:19:50,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-16 03:19:50,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 03:19:50,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-16 03:19:50,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:19:50,969 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:51,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 03:19:51,042 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2021-10-16 03:19:51,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 03:19:51,043 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-10-16 03:19:51,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 03:19:51,043 INFO L225 Difference]: With dead ends: 18 [2021-10-16 03:19:51,043 INFO L226 Difference]: Without dead ends: 18 [2021-10-16 03:19:51,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-16 03:19:51,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-16 03:19:51,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2021-10-16 03:19:51,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-16 03:19:51,047 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 6 [2021-10-16 03:19:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 03:19:51,047 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-16 03:19:51,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 03:19:51,048 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-16 03:19:51,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 03:19:51,048 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 03:19:51,048 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2021-10-16 03:19:51,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 03:19:51,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 03:19:51,249 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-16 03:19:51,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 03:19:51,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2009516503, now seen corresponding path program 1 times [2021-10-16 03:19:51,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 03:19:51,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574766285] [2021-10-16 03:19:51,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 03:19:51,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 03:19:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:19:51,269 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 03:19:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 03:19:51,307 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-16 03:19:51,307 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 03:19:51,308 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-16 03:19:51,310 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-16 03:19:51,311 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK [2021-10-16 03:19:51,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-10-16 03:19:51,319 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 03:19:51,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 03:19:51 BoogieIcfgContainer [2021-10-16 03:19:51,336 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 03:19:51,336 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 03:19:51,337 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 03:19:51,337 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 03:19:51,337 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 03:19:49" (3/4) ... [2021-10-16 03:19:51,339 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 03:19:51,371 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 03:19:51,371 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 03:19:51,372 INFO L168 Benchmark]: Toolchain (without parser) took 2655.76 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 49.2 MB in the beginning and 63.8 MB in the end (delta: -14.5 MB). Peak memory consumption was 2.3 MB. Max. memory is 16.1 GB. [2021-10-16 03:19:51,372 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory is still 65.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:19:51,373 INFO L168 Benchmark]: CACSL2BoogieTranslator took 227.45 ms. Allocated memory is still 90.2 MB. Free memory was 49.1 MB in the beginning and 68.0 MB in the end (delta: -18.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 03:19:51,373 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.31 ms. Allocated memory is still 90.2 MB. Free memory was 67.9 MB in the beginning and 66.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 03:19:51,374 INFO L168 Benchmark]: Boogie Preprocessor took 20.43 ms. Allocated memory is still 90.2 MB. Free memory was 66.4 MB in the beginning and 65.6 MB in the end (delta: 848.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:19:51,374 INFO L168 Benchmark]: RCFGBuilder took 266.79 ms. Allocated memory is still 90.2 MB. Free memory was 65.4 MB in the beginning and 56.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 03:19:51,375 INFO L168 Benchmark]: TraceAbstraction took 2067.26 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 55.8 MB in the beginning and 65.9 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-10-16 03:19:51,375 INFO L168 Benchmark]: Witness Printer took 34.55 ms. Allocated memory is still 109.1 MB. Free memory was 65.9 MB in the beginning and 63.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 03:19:51,378 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 90.2 MB. Free memory is still 65.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 227.45 ms. Allocated memory is still 90.2 MB. Free memory was 49.1 MB in the beginning and 68.0 MB in the end (delta: -18.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.31 ms. Allocated memory is still 90.2 MB. Free memory was 67.9 MB in the beginning and 66.4 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.43 ms. Allocated memory is still 90.2 MB. Free memory was 66.4 MB in the beginning and 65.6 MB in the end (delta: 848.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 266.79 ms. Allocated memory is still 90.2 MB. Free memory was 65.4 MB in the beginning and 56.3 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2067.26 ms. Allocated memory was 90.2 MB in the beginning and 109.1 MB in the end (delta: 18.9 MB). Free memory was 55.8 MB in the beginning and 65.9 MB in the end (delta: -10.0 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. * Witness Printer took 34.55 ms. Allocated memory is still 109.1 MB. Free memory was 65.9 MB in the beginning and 63.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 8]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L2] int* p; [L3] int i = 0; [L3] COND TRUE i < 2 [L4] int a[10]; [L5] COND TRUE i == 0 [L6] p = a [L3] i++ [L3] COND TRUE i < 2 [L4] int a[10]; [L5] COND FALSE !(i == 0) [L8] p[0] = 1 - UnprovableResult [Line: 8]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 1972.2ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 10.8ms, AutomataDifference: 161.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 29.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 17 SDtfs, 11 SDslu, 9 SDs, 0 SdLazy, 51 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 90.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 460.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=3, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 17.1ms AutomataMinimizationTime, 3 MinimizatonAttempts, 10 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 15.1ms SsaConstructionTime, 56.7ms SatisfiabilityAnalysisTime, 208.8ms InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 50 SizeOfPredicates, 0 NumberOfNonLiveVariables, 33 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 0/3 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME[ms]: 549, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 6, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 9, TOOLS_POST_TIME[ms]: 346, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 9, TOOLS_QUANTIFIERELIM_TIME[ms]: 339, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 111, FLUID_QUERY_TIME[ms]: 3, FLUID_QUERIES: 17, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME[ms]: 151, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME[ms]: 0, DOMAIN_ISSUBSETEQ_APPLICATIONS: 1, DOMAIN_ISSUBSETEQ_TIME[ms]: 0, DOMAIN_ISBOTTOM_APPLICATIONS: 6, DOMAIN_ISBOTTOM_TIME[ms]: 7, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 134, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 134, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 1, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 2, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 8, DAG_COMPRESSION_PROCESSED_NODES: 55, DAG_COMPRESSION_RETAINED_NODES: 22, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-16 03:19:51,425 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a15b908-2262-4a85-91a5-30f268e3d908/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...