./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1bdc21b2f61b0d69220994ec3f8dc9d2db928c146bd54c19e0632aa07d01871a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:51:11,692 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:51:11,785 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:51:11,790 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:51:11,791 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:51:11,822 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:51:11,822 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:51:11,823 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:51:11,824 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:51:11,825 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:51:11,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:51:11,826 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:51:11,827 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:51:11,828 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:51:11,829 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:51:11,829 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:51:11,830 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:51:11,831 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:51:11,832 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:51:11,832 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:51:11,833 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:51:11,834 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:51:11,835 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:51:11,835 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:51:11,836 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:51:11,836 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:51:11,837 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:51:11,837 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:51:11,838 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:51:11,839 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:51:11,839 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:51:11,840 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:51:11,840 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:51:11,841 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:51:11,841 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:51:11,842 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:51:11,842 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:51:11,843 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:51:11,843 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:51:11,844 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:51:11,844 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:51:11,845 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bdc21b2f61b0d69220994ec3f8dc9d2db928c146bd54c19e0632aa07d01871a [2023-11-24 21:51:12,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:51:12,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:51:12,151 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:51:12,155 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:51:12,156 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:51:12,157 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2023-11-24 21:51:15,398 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:51:15,763 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:51:15,772 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/sv-benchmarks/c/list-ext-properties/960521-1_1-1.i [2023-11-24 21:51:15,790 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/data/9abbfd45a/76b11208daa247b7861483bf2c753755/FLAG4edd874de [2023-11-24 21:51:15,802 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/data/9abbfd45a/76b11208daa247b7861483bf2c753755 [2023-11-24 21:51:15,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:51:15,806 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:51:15,807 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:51:15,807 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:51:15,814 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:51:15,814 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:51:15" (1/1) ... [2023-11-24 21:51:15,816 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20fa559b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:15, skipping insertion in model container [2023-11-24 21:51:15,817 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:51:15" (1/1) ... [2023-11-24 21:51:15,864 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:51:16,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:51:16,268 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:51:16,333 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:51:16,367 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:51:16,368 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:16 WrapperNode [2023-11-24 21:51:16,368 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:51:16,370 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:51:16,370 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:51:16,370 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:51:16,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:16" (1/1) ... [2023-11-24 21:51:16,392 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:16" (1/1) ... [2023-11-24 21:51:16,420 INFO L138 Inliner]: procedures = 122, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2023-11-24 21:51:16,421 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:51:16,422 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:51:16,422 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:51:16,422 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:51:16,435 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:16" (1/1) ... [2023-11-24 21:51:16,436 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:16" (1/1) ... [2023-11-24 21:51:16,439 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:16" (1/1) ... [2023-11-24 21:51:16,469 INFO L175 MemorySlicer]: Split 6 memory accesses to 3 slices as follows [2, 1, 3]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 3 writes are split as follows [0, 1, 2]. [2023-11-24 21:51:16,470 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:16" (1/1) ... [2023-11-24 21:51:16,470 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:16" (1/1) ... [2023-11-24 21:51:16,490 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:16" (1/1) ... [2023-11-24 21:51:16,494 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:16" (1/1) ... [2023-11-24 21:51:16,496 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:16" (1/1) ... [2023-11-24 21:51:16,497 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:16" (1/1) ... [2023-11-24 21:51:16,500 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:51:16,501 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:51:16,501 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:51:16,501 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:51:16,502 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:16" (1/1) ... [2023-11-24 21:51:16,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:51:16,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:16,550 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:51:16,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:51:16,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:51:16,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:51:16,591 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:51:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:51:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:51:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:51:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:51:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:51:16,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:51:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:51:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:51:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:51:16,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:51:16,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:51:16,721 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:51:16,724 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:51:16,927 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:51:16,959 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:51:16,959 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-24 21:51:16,960 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:51:16 BoogieIcfgContainer [2023-11-24 21:51:16,960 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:51:16,962 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:51:16,963 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:51:16,970 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:51:16,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:51:15" (1/3) ... [2023-11-24 21:51:16,971 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec1f848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:51:16, skipping insertion in model container [2023-11-24 21:51:16,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:16" (2/3) ... [2023-11-24 21:51:16,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ec1f848 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:51:16, skipping insertion in model container [2023-11-24 21:51:16,974 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:51:16" (3/3) ... [2023-11-24 21:51:16,976 INFO L112 eAbstractionObserver]: Analyzing ICFG 960521-1_1-1.i [2023-11-24 21:51:17,001 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:51:17,003 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2023-11-24 21:51:17,064 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:51:17,071 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5b3c17ab, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:51:17,072 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-11-24 21:51:17,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 27 states have (on average 2.037037037037037) internal successors, (55), 48 states have internal predecessors, (55), 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) [2023-11-24 21:51:17,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 21:51:17,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:17,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 21:51:17,085 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:51:17,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:17,091 INFO L85 PathProgramCache]: Analyzing trace with hash 3708052, now seen corresponding path program 1 times [2023-11-24 21:51:17,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:17,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861741010] [2023-11-24 21:51:17,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:17,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:17,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:51:17,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:17,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861741010] [2023-11-24 21:51:17,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861741010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:17,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:17,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:51:17,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740142791] [2023-11-24 21:51:17,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:17,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-24 21:51:17,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:17,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-24 21:51:17,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:51:17,355 INFO L87 Difference]: Start difference. First operand has 49 states, 27 states have (on average 2.037037037037037) internal successors, (55), 48 states have internal predecessors, (55), 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 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:17,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:17,386 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2023-11-24 21:51:17,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-24 21:51:17,389 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-24 21:51:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:17,398 INFO L225 Difference]: With dead ends: 49 [2023-11-24 21:51:17,398 INFO L226 Difference]: Without dead ends: 48 [2023-11-24 21:51:17,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-24 21:51:17,405 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:17,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:51:17,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-24 21:51:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-24 21:51:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 47 states have internal predecessors, (51), 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) [2023-11-24 21:51:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2023-11-24 21:51:17,445 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 4 [2023-11-24 21:51:17,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:17,445 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2023-11-24 21:51:17,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:17,446 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2023-11-24 21:51:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:51:17,446 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:17,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:51:17,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:51:17,447 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:51:17,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:17,448 INFO L85 PathProgramCache]: Analyzing trace with hash 114735265, now seen corresponding path program 1 times [2023-11-24 21:51:17,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:17,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550700286] [2023-11-24 21:51:17,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:17,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:17,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:51:17,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:17,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550700286] [2023-11-24 21:51:17,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550700286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:17,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:17,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:51:17,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370145431] [2023-11-24 21:51:17,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:17,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:51:17,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:17,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:51:17,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:51:17,760 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:17,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:17,828 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2023-11-24 21:51:17,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:51:17,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-24 21:51:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:17,830 INFO L225 Difference]: With dead ends: 47 [2023-11-24 21:51:17,830 INFO L226 Difference]: Without dead ends: 47 [2023-11-24 21:51:17,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:51:17,834 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:17,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 76 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:51:17,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-24 21:51:17,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-11-24 21:51:17,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 46 states have internal predecessors, (50), 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) [2023-11-24 21:51:17,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-11-24 21:51:17,849 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 5 [2023-11-24 21:51:17,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:17,849 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-11-24 21:51:17,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:17,849 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-11-24 21:51:17,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:51:17,850 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:17,850 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:51:17,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:51:17,850 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:51:17,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:17,851 INFO L85 PathProgramCache]: Analyzing trace with hash 114735266, now seen corresponding path program 1 times [2023-11-24 21:51:17,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:17,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151934949] [2023-11-24 21:51:17,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:17,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:18,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:51:18,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:18,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151934949] [2023-11-24 21:51:18,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151934949] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:18,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:18,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:51:18,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92481343] [2023-11-24 21:51:18,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:18,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:51:18,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:18,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:51:18,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:51:18,098 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:18,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:18,161 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2023-11-24 21:51:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:51:18,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-24 21:51:18,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:18,163 INFO L225 Difference]: With dead ends: 46 [2023-11-24 21:51:18,164 INFO L226 Difference]: Without dead ends: 46 [2023-11-24 21:51:18,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:51:18,166 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 45 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:18,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 72 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:51:18,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-24 21:51:18,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2023-11-24 21:51:18,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 27 states have (on average 1.8148148148148149) internal successors, (49), 45 states have internal predecessors, (49), 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) [2023-11-24 21:51:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2023-11-24 21:51:18,177 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 5 [2023-11-24 21:51:18,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:18,177 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2023-11-24 21:51:18,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:18,178 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2023-11-24 21:51:18,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 21:51:18,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:18,178 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:18,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:51:18,179 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:51:18,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:18,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1408484175, now seen corresponding path program 1 times [2023-11-24 21:51:18,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:18,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203711760] [2023-11-24 21:51:18,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:18,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:18,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:51:18,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:18,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203711760] [2023-11-24 21:51:18,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203711760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:18,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:18,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:51:18,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132514057] [2023-11-24 21:51:18,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:18,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:51:18,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:18,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:51:18,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:51:18,294 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-11-24 21:51:18,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:18,344 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2023-11-24 21:51:18,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:51:18,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2023-11-24 21:51:18,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:18,346 INFO L225 Difference]: With dead ends: 43 [2023-11-24 21:51:18,346 INFO L226 Difference]: Without dead ends: 43 [2023-11-24 21:51:18,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:51:18,347 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 23 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:18,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 56 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:51:18,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-24 21:51:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-24 21:51:18,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 42 states have internal predecessors, (46), 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) [2023-11-24 21:51:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2023-11-24 21:51:18,354 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 7 [2023-11-24 21:51:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:18,354 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2023-11-24 21:51:18,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-11-24 21:51:18,355 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2023-11-24 21:51:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 21:51:18,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:18,355 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:18,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:51:18,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:51:18,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1408484174, now seen corresponding path program 1 times [2023-11-24 21:51:18,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:18,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118568979] [2023-11-24 21:51:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:18,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:18,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:51:18,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:18,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118568979] [2023-11-24 21:51:18,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118568979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:18,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:18,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:51:18,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867787262] [2023-11-24 21:51:18,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:18,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:51:18,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:18,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:51:18,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:51:18,572 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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) [2023-11-24 21:51:18,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:18,653 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2023-11-24 21:51:18,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:51:18,653 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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 7 [2023-11-24 21:51:18,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:18,654 INFO L225 Difference]: With dead ends: 51 [2023-11-24 21:51:18,654 INFO L226 Difference]: Without dead ends: 51 [2023-11-24 21:51:18,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:51:18,656 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:18,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 79 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:51:18,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-24 21:51:18,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2023-11-24 21:51:18,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 44 states have internal predecessors, (49), 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) [2023-11-24 21:51:18,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-11-24 21:51:18,662 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 7 [2023-11-24 21:51:18,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:18,662 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-11-24 21:51:18,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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) [2023-11-24 21:51:18,663 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-11-24 21:51:18,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 21:51:18,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:18,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:18,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:51:18,664 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:51:18,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:18,665 INFO L85 PathProgramCache]: Analyzing trace with hash -638645347, now seen corresponding path program 1 times [2023-11-24 21:51:18,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:18,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745994556] [2023-11-24 21:51:18,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:18,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:51:18,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:18,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745994556] [2023-11-24 21:51:18,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745994556] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:18,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:18,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:51:18,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179964932] [2023-11-24 21:51:18,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:18,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:51:18,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:18,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:51:18,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:51:18,741 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:18,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:18,790 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2023-11-24 21:51:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:51:18,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-24 21:51:18,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:18,791 INFO L225 Difference]: With dead ends: 50 [2023-11-24 21:51:18,791 INFO L226 Difference]: Without dead ends: 50 [2023-11-24 21:51:18,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:51:18,792 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:18,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 65 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:51:18,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-24 21:51:18,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2023-11-24 21:51:18,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 44 states have internal predecessors, (48), 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) [2023-11-24 21:51:18,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2023-11-24 21:51:18,798 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 9 [2023-11-24 21:51:18,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:18,798 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2023-11-24 21:51:18,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:18,798 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2023-11-24 21:51:18,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 21:51:18,799 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:18,799 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:18,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:51:18,799 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:51:18,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:18,800 INFO L85 PathProgramCache]: Analyzing trace with hash -638528649, now seen corresponding path program 1 times [2023-11-24 21:51:18,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:18,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258370929] [2023-11-24 21:51:18,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:18,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:18,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:51:18,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:18,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258370929] [2023-11-24 21:51:18,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258370929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:18,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255488651] [2023-11-24 21:51:18,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:18,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:18,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:18,872 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:18,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:51:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:18,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:51:18,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:51:19,056 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:51:19,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255488651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:19,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:51:19,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-11-24 21:51:19,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20087265] [2023-11-24 21:51:19,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:19,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:51:19,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:19,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:51:19,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:51:19,060 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:19,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:19,116 INFO L93 Difference]: Finished difference Result 84 states and 88 transitions. [2023-11-24 21:51:19,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:51:19,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-24 21:51:19,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:19,122 INFO L225 Difference]: With dead ends: 84 [2023-11-24 21:51:19,122 INFO L226 Difference]: Without dead ends: 84 [2023-11-24 21:51:19,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:51:19,123 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 36 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:19,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 101 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:51:19,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-24 21:51:19,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 54. [2023-11-24 21:51:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 53 states have internal predecessors, (58), 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) [2023-11-24 21:51:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2023-11-24 21:51:19,143 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 9 [2023-11-24 21:51:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:19,143 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2023-11-24 21:51:19,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:51:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2023-11-24 21:51:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 21:51:19,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:19,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:19,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:19,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:19,352 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:51:19,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:19,353 INFO L85 PathProgramCache]: Analyzing trace with hash -926355364, now seen corresponding path program 1 times [2023-11-24 21:51:19,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:19,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847198381] [2023-11-24 21:51:19,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:19,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:19,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:51:19,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:19,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847198381] [2023-11-24 21:51:19,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847198381] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:19,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007927340] [2023-11-24 21:51:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:19,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:19,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:19,767 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:19,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:51:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:19,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-24 21:51:19,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:19,961 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-24 21:51:19,962 INFO L378 Elim1Store]: Elim1 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 1 case distinctions, treesize of input 9 treesize of output 11 [2023-11-24 21:51:20,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:51:20,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:51:20,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:51:20,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007927340] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:51:20,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:51:20,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2023-11-24 21:51:20,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96989775] [2023-11-24 21:51:20,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:51:20,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 21:51:20,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:20,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 21:51:20,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:51:20,403 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2023-11-24 21:51:21,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:21,177 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2023-11-24 21:51:21,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:51:21,178 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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 11 [2023-11-24 21:51:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:21,180 INFO L225 Difference]: With dead ends: 142 [2023-11-24 21:51:21,180 INFO L226 Difference]: Without dead ends: 142 [2023-11-24 21:51:21,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2023-11-24 21:51:21,181 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 328 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:21,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 361 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-24 21:51:21,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-24 21:51:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 65. [2023-11-24 21:51:21,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 64 states have internal predecessors, (71), 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) [2023-11-24 21:51:21,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2023-11-24 21:51:21,190 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 11 [2023-11-24 21:51:21,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:21,190 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2023-11-24 21:51:21,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 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) [2023-11-24 21:51:21,191 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2023-11-24 21:51:21,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:51:21,191 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:21,191 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:21,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:21,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:21,398 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:51:21,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:21,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1546382, now seen corresponding path program 1 times [2023-11-24 21:51:21,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:21,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823653130] [2023-11-24 21:51:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:21,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:21,477 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:51:21,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:21,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823653130] [2023-11-24 21:51:21,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823653130] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:21,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:21,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:51:21,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272295008] [2023-11-24 21:51:21,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:21,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:51:21,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:21,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:51:21,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:51:21,482 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2023-11-24 21:51:21,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:21,535 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2023-11-24 21:51:21,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:51:21,536 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) Word has length 12 [2023-11-24 21:51:21,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:21,537 INFO L225 Difference]: With dead ends: 63 [2023-11-24 21:51:21,537 INFO L226 Difference]: Without dead ends: 63 [2023-11-24 21:51:21,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:51:21,540 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 16 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:21,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 68 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:51:21,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-24 21:51:21,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-24 21:51:21,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 62 states have internal predecessors, (69), 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) [2023-11-24 21:51:21,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 69 transitions. [2023-11-24 21:51:21,554 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 69 transitions. Word has length 12 [2023-11-24 21:51:21,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:21,554 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 69 transitions. [2023-11-24 21:51:21,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2023-11-24 21:51:21,555 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2023-11-24 21:51:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:51:21,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:21,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:21,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:51:21,557 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2023-11-24 21:51:21,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:21,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1546383, now seen corresponding path program 1 times [2023-11-24 21:51:21,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:21,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435456712] [2023-11-24 21:51:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:21,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:51:21,593 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-24 21:51:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-24 21:51:21,623 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-24 21:51:21,623 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-24 21:51:21,625 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 21 remaining) [2023-11-24 21:51:21,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 21 remaining) [2023-11-24 21:51:21,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 21 remaining) [2023-11-24 21:51:21,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 21 remaining) [2023-11-24 21:51:21,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 21 remaining) [2023-11-24 21:51:21,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 21 remaining) [2023-11-24 21:51:21,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 21 remaining) [2023-11-24 21:51:21,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 21 remaining) [2023-11-24 21:51:21,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE (12 of 21 remaining) [2023-11-24 21:51:21,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE (11 of 21 remaining) [2023-11-24 21:51:21,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (10 of 21 remaining) [2023-11-24 21:51:21,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (9 of 21 remaining) [2023-11-24 21:51:21,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (8 of 21 remaining) [2023-11-24 21:51:21,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (7 of 21 remaining) [2023-11-24 21:51:21,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE (6 of 21 remaining) [2023-11-24 21:51:21,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE (5 of 21 remaining) [2023-11-24 21:51:21,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (4 of 21 remaining) [2023-11-24 21:51:21,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (3 of 21 remaining) [2023-11-24 21:51:21,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (2 of 21 remaining) [2023-11-24 21:51:21,633 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE (1 of 21 remaining) [2023-11-24 21:51:21,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK (0 of 21 remaining) [2023-11-24 21:51:21,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:51:21,639 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:21,646 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 21:51:21,664 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~post9 [2023-11-24 21:51:21,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 09:51:21 BoogieIcfgContainer [2023-11-24 21:51:21,674 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 21:51:21,674 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 21:51:21,674 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 21:51:21,675 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 21:51:21,675 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:51:16" (3/4) ... [2023-11-24 21:51:21,676 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-24 21:51:21,682 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~post9 [2023-11-24 21:51:21,723 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/witness.graphml [2023-11-24 21:51:21,724 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 21:51:21,724 INFO L158 Benchmark]: Toolchain (without parser) took 5918.86ms. Allocated memory was 161.5MB in the beginning and 211.8MB in the end (delta: 50.3MB). Free memory was 129.4MB in the beginning and 127.3MB in the end (delta: 2.0MB). Peak memory consumption was 54.7MB. Max. memory is 16.1GB. [2023-11-24 21:51:21,729 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 119.5MB. Free memory was 77.2MB in the beginning and 77.1MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:51:21,729 INFO L158 Benchmark]: CACSL2BoogieTranslator took 561.68ms. Allocated memory is still 161.5MB. Free memory was 129.4MB in the beginning and 112.6MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-24 21:51:21,730 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.61ms. Allocated memory is still 161.5MB. Free memory was 112.0MB in the beginning and 110.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 21:51:21,730 INFO L158 Benchmark]: Boogie Preprocessor took 78.41ms. Allocated memory is still 161.5MB. Free memory was 110.5MB in the beginning and 108.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 21:51:21,731 INFO L158 Benchmark]: RCFGBuilder took 458.92ms. Allocated memory is still 161.5MB. Free memory was 107.8MB in the beginning and 92.3MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-24 21:51:21,732 INFO L158 Benchmark]: TraceAbstraction took 4711.33ms. Allocated memory was 161.5MB in the beginning and 211.8MB in the end (delta: 50.3MB). Free memory was 91.6MB in the beginning and 129.4MB in the end (delta: -37.8MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. [2023-11-24 21:51:21,733 INFO L158 Benchmark]: Witness Printer took 49.39ms. Allocated memory is still 211.8MB. Free memory was 129.4MB in the beginning and 127.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 21:51:21,735 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 119.5MB. Free memory was 77.2MB in the beginning and 77.1MB in the end (delta: 159.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 561.68ms. Allocated memory is still 161.5MB. Free memory was 129.4MB in the beginning and 112.6MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.61ms. Allocated memory is still 161.5MB. Free memory was 112.0MB in the beginning and 110.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 78.41ms. Allocated memory is still 161.5MB. Free memory was 110.5MB in the beginning and 108.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 458.92ms. Allocated memory is still 161.5MB. Free memory was 107.8MB in the beginning and 92.3MB in the end (delta: 15.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 4711.33ms. Allocated memory was 161.5MB in the beginning and 211.8MB in the end (delta: 50.3MB). Free memory was 91.6MB in the beginning and 129.4MB in the end (delta: -37.8MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. * Witness Printer took 49.39ms. Allocated memory is still 211.8MB. Free memory was 129.4MB in the beginning and 127.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~post9 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~post9 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: -1]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L523] int *a, *b; [L524] int n; [L536] n = 1 VAL [a={0:0}, b={0:0}, n=1] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] EXPR b++ VAL [a={-2:0}, b={-1:4}, n=1] [L542] *b++ = 0 [L543] CALL foo() [L528] int i; [L529] i = 0 VAL [a={-2:0}, b={-1:4}, i=0, n=1] [L529] COND TRUE i < n VAL [a={-2:0}, b={-1:4}, i=0, n=1] [L530] a[i] = n [L529] i++ VAL [a={-2:0}, b={-1:4}, i=1, n=1] [L529] COND FALSE !(i < n) VAL [a={-2:0}, b={-1:4}, i=1, n=1] [L531] i = 0 VAL [a={-2:0}, b={-1:4}, i=0, n=1] [L531] COND FALSE !(i < n - 1) VAL [a={-2:0}, b={-1:4}, i=0, n=1] [L543] RET foo() [L544] b[-2] - UnprovableResult [Line: -1]: 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 pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: 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 pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 534]: 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, 49 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 4.6s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 507 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 507 mSDsluCounter, 925 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 564 mSDsCounter, 20 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 633 IncrementalHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20 mSolverCounterUnsat, 361 mSDtfsCounter, 633 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=8, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 118 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 101 NumberOfCodeBlocks, 101 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 88 ConstructedInterpolants, 4 QuantifiedInterpolants, 677 SizeOfPredicates, 4 NumberOfNonLiveVariables, 166 ConjunctsInSsa, 23 ConjunctsInUnsatCore, 12 InterpolantComputations, 8 PerfectInterpolantSequences, 4/17 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-24 21:51:21,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0f19c9e3-5455-422c-a6d5-01e07ab98f6b/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref)