./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6bfeee33a1b1d098a34bec7a761d4de16bc595043f21d77f5851cba758b79f34 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-dbf71c6-m [2022-10-17 10:50:10,780 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 10:50:10,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 10:50:10,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 10:50:10,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 10:50:10,839 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 10:50:10,842 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 10:50:10,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 10:50:10,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 10:50:10,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 10:50:10,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 10:50:10,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 10:50:10,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 10:50:10,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 10:50:10,866 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 10:50:10,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 10:50:10,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 10:50:10,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 10:50:10,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 10:50:10,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 10:50:10,885 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 10:50:10,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 10:50:10,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 10:50:10,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 10:50:10,902 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 10:50:10,902 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 10:50:10,903 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 10:50:10,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 10:50:10,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 10:50:10,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 10:50:10,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 10:50:10,909 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 10:50:10,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 10:50:10,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 10:50:10,925 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 10:50:10,925 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 10:50:10,926 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 10:50:10,926 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 10:50:10,926 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 10:50:10,927 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 10:50:10,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 10:50:10,931 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-10-17 10:50:10,985 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 10:50:10,985 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 10:50:10,986 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 10:50:10,986 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 10:50:10,987 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 10:50:10,987 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 10:50:10,988 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 10:50:10,988 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 10:50:10,989 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 10:50:10,989 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 10:50:10,990 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 10:50:10,990 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-10-17 10:50:10,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 10:50:10,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 10:50:10,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 10:50:10,991 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-10-17 10:50:10,991 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-10-17 10:50:10,991 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-10-17 10:50:10,992 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 10:50:10,992 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-10-17 10:50:10,992 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 10:50:10,992 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 10:50:10,992 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 10:50:10,993 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 10:50:10,993 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 10:50:10,993 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:50:10,993 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 10:50:10,994 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 10:50:10,994 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 10:50:10,994 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 10:50:10,994 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6bfeee33a1b1d098a34bec7a761d4de16bc595043f21d77f5851cba758b79f34 [2022-10-17 10:50:11,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 10:50:11,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 10:50:11,278 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 10:50:11,279 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 10:50:11,280 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 10:50:11,281 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/list-simple/dll2c_update_all.i [2022-10-17 10:50:11,354 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/data/da38a3541/5e393af0065342ee9af29878133d530e/FLAG2dd35779e [2022-10-17 10:50:11,938 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 10:50:11,938 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/sv-benchmarks/c/list-simple/dll2c_update_all.i [2022-10-17 10:50:11,950 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/data/da38a3541/5e393af0065342ee9af29878133d530e/FLAG2dd35779e [2022-10-17 10:50:12,242 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/data/da38a3541/5e393af0065342ee9af29878133d530e [2022-10-17 10:50:12,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 10:50:12,246 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 10:50:12,247 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 10:50:12,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 10:50:12,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 10:50:12,258 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:50:12" (1/1) ... [2022-10-17 10:50:12,259 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4df1c4c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:12, skipping insertion in model container [2022-10-17 10:50:12,259 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 10:50:12" (1/1) ... [2022-10-17 10:50:12,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 10:50:12,332 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 10:50:12,797 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/sv-benchmarks/c/list-simple/dll2c_update_all.i[24538,24551] [2022-10-17 10:50:12,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:50:12,819 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 10:50:12,875 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/sv-benchmarks/c/list-simple/dll2c_update_all.i[24538,24551] [2022-10-17 10:50:12,876 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 10:50:12,908 INFO L208 MainTranslator]: Completed translation [2022-10-17 10:50:12,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:12 WrapperNode [2022-10-17 10:50:12,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 10:50:12,910 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 10:50:12,910 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 10:50:12,910 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 10:50:12,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:12" (1/1) ... [2022-10-17 10:50:12,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:12" (1/1) ... [2022-10-17 10:50:12,962 INFO L138 Inliner]: procedures = 126, calls = 29, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 137 [2022-10-17 10:50:12,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 10:50:12,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 10:50:12,964 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 10:50:12,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 10:50:12,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:12" (1/1) ... [2022-10-17 10:50:12,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:12" (1/1) ... [2022-10-17 10:50:12,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:12" (1/1) ... [2022-10-17 10:50:12,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:12" (1/1) ... [2022-10-17 10:50:12,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:12" (1/1) ... [2022-10-17 10:50:12,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:12" (1/1) ... [2022-10-17 10:50:12,998 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:12" (1/1) ... [2022-10-17 10:50:13,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:12" (1/1) ... [2022-10-17 10:50:13,004 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 10:50:13,005 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 10:50:13,005 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 10:50:13,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 10:50:13,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:12" (1/1) ... [2022-10-17 10:50:13,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 10:50:13,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:13,071 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 10:50:13,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 10:50:13,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 10:50:13,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 10:50:13,144 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-10-17 10:50:13,144 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-10-17 10:50:13,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-10-17 10:50:13,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 10:50:13,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-10-17 10:50:13,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-10-17 10:50:13,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 10:50:13,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 10:50:13,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 10:50:13,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 10:50:13,363 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 10:50:13,372 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 10:50:13,740 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 10:50:13,752 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 10:50:13,752 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-10-17 10:50:13,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:50:13 BoogieIcfgContainer [2022-10-17 10:50:13,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 10:50:13,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 10:50:13,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 10:50:13,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 10:50:13,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 10:50:12" (1/3) ... [2022-10-17 10:50:13,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5b2646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:50:13, skipping insertion in model container [2022-10-17 10:50:13,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 10:50:12" (2/3) ... [2022-10-17 10:50:13,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f5b2646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 10:50:13, skipping insertion in model container [2022-10-17 10:50:13,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 10:50:13" (3/3) ... [2022-10-17 10:50:13,768 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_update_all.i [2022-10-17 10:50:13,789 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 10:50:13,790 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-10-17 10:50:13,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 10:50:13,886 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3636d17, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 10:50:13,886 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-10-17 10:50:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 89 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:50:13,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 10:50:13,910 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:13,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 10:50:13,911 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:13,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:13,923 INFO L85 PathProgramCache]: Analyzing trace with hash 894964530, now seen corresponding path program 1 times [2022-10-17 10:50:13,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:13,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708728828] [2022-10-17 10:50:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:13,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:50:14,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:14,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708728828] [2022-10-17 10:50:14,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708728828] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:14,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:14,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:50:14,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943991612] [2022-10-17 10:50:14,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:14,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:50:14,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:50:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:50:14,326 INFO L87 Difference]: Start difference. First operand has 93 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 89 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:50:14,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:14,492 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2022-10-17 10:50:14,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:50:14,496 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-17 10:50:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:14,510 INFO L225 Difference]: With dead ends: 90 [2022-10-17 10:50:14,510 INFO L226 Difference]: Without dead ends: 87 [2022-10-17 10:50:14,512 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 [2022-10-17 10:50:14,517 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:14,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 147 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:50:14,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-10-17 10:50:14,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-10-17 10:50:14,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 83 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:50:14,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2022-10-17 10:50:14,599 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 6 [2022-10-17 10:50:14,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:14,600 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2022-10-17 10:50:14,600 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:50:14,600 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2022-10-17 10:50:14,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-10-17 10:50:14,601 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:14,601 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-10-17 10:50:14,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 10:50:14,614 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:14,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:14,616 INFO L85 PathProgramCache]: Analyzing trace with hash 894964531, now seen corresponding path program 1 times [2022-10-17 10:50:14,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:14,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332340094] [2022-10-17 10:50:14,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:14,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:14,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:50:14,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:14,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332340094] [2022-10-17 10:50:14,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332340094] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:14,811 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:14,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 10:50:14,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691813832] [2022-10-17 10:50:14,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:14,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 10:50:14,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:14,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 10:50:14,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 10:50:14,815 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:50:14,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:14,879 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2022-10-17 10:50:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 10:50:14,880 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-10-17 10:50:14,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:14,881 INFO L225 Difference]: With dead ends: 84 [2022-10-17 10:50:14,881 INFO L226 Difference]: Without dead ends: 84 [2022-10-17 10:50:14,882 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 [2022-10-17 10:50:14,884 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 5 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:14,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 149 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:50:14,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-10-17 10:50:14,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-10-17 10:50:14,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 80 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:50:14,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2022-10-17 10:50:14,895 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 6 [2022-10-17 10:50:14,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:14,896 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2022-10-17 10:50:14,896 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 10:50:14,896 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2022-10-17 10:50:14,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-10-17 10:50:14,897 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:14,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:14,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 10:50:14,898 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:14,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:14,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1046244471, now seen corresponding path program 1 times [2022-10-17 10:50:14,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:14,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052853424] [2022-10-17 10:50:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:14,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:15,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:50:15,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:15,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052853424] [2022-10-17 10:50:15,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052853424] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:15,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:15,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-10-17 10:50:15,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122842807] [2022-10-17 10:50:15,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:15,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:50:15,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:15,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:50:15,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:50:15,120 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:50:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:15,216 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2022-10-17 10:50:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:50:15,217 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-10-17 10:50:15,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:15,218 INFO L225 Difference]: With dead ends: 95 [2022-10-17 10:50:15,219 INFO L226 Difference]: Without dead ends: 95 [2022-10-17 10:50:15,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-10-17 10:50:15,221 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:15,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 223 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:50:15,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-10-17 10:50:15,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2022-10-17 10:50:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 81 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:50:15,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2022-10-17 10:50:15,234 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 14 [2022-10-17 10:50:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:15,234 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2022-10-17 10:50:15,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-10-17 10:50:15,235 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2022-10-17 10:50:15,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 10:50:15,235 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:15,236 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:15,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 10:50:15,236 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:15,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:15,237 INFO L85 PathProgramCache]: Analyzing trace with hash 543084160, now seen corresponding path program 1 times [2022-10-17 10:50:15,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:15,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043184342] [2022-10-17 10:50:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:15,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:15,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:15,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:15,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 10:50:15,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:15,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043184342] [2022-10-17 10:50:15,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043184342] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:15,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:15,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:50:15,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175605958] [2022-10-17 10:50:15,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:15,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:50:15,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:15,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:50:15,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:50:15,531 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:15,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:15,786 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2022-10-17 10:50:15,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:50:15,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-10-17 10:50:15,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:15,792 INFO L225 Difference]: With dead ends: 105 [2022-10-17 10:50:15,793 INFO L226 Difference]: Without dead ends: 105 [2022-10-17 10:50:15,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:50:15,804 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 77 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:15,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 286 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:50:15,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-10-17 10:50:15,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2022-10-17 10:50:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.6296296296296295) internal successors, (88), 80 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:50:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2022-10-17 10:50:15,825 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 24 [2022-10-17 10:50:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:15,826 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2022-10-17 10:50:15,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:15,827 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2022-10-17 10:50:15,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-10-17 10:50:15,827 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:15,828 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:15,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 10:50:15,828 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:15,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:15,829 INFO L85 PathProgramCache]: Analyzing trace with hash 543084161, now seen corresponding path program 1 times [2022-10-17 10:50:15,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:15,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094686913] [2022-10-17 10:50:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:15,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:16,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:16,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:16,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:16,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:50:16,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:16,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094686913] [2022-10-17 10:50:16,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094686913] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:16,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:16,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-10-17 10:50:16,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040560794] [2022-10-17 10:50:16,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:16,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:50:16,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:16,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:50:16,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:50:16,358 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:16,547 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2022-10-17 10:50:16,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:50:16,548 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-10-17 10:50:16,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:16,549 INFO L225 Difference]: With dead ends: 84 [2022-10-17 10:50:16,549 INFO L226 Difference]: Without dead ends: 84 [2022-10-17 10:50:16,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:50:16,550 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 77 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:16,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 295 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:50:16,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-10-17 10:50:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-10-17 10:50:16,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 79 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:50:16,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-10-17 10:50:16,558 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 24 [2022-10-17 10:50:16,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:16,558 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-10-17 10:50:16,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:16,559 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-10-17 10:50:16,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-17 10:50:16,560 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:16,560 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:16,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 10:50:16,560 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:16,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:16,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2082132639, now seen corresponding path program 1 times [2022-10-17 10:50:16,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:16,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116412498] [2022-10-17 10:50:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:16,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:16,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:16,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:16,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:16,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:50:16,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:16,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116412498] [2022-10-17 10:50:16,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116412498] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:16,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059950078] [2022-10-17 10:50:16,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:16,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:16,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:16,910 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:16,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 10:50:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:17,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 15 conjunts are in the unsatisfiable core [2022-10-17 10:50:17,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:17,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 10:50:17,286 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-10-17 10:50:17,287 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-10-17 10:50:17,301 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:50:17,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:50:17,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059950078] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:17,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:50:17,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-10-17 10:50:17,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311924667] [2022-10-17 10:50:17,391 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:50:17,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:50:17,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:17,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:50:17,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-10-17 10:50:17,393 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:50:17,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:17,675 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2022-10-17 10:50:17,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:50:17,676 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-10-17 10:50:17,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:17,677 INFO L225 Difference]: With dead ends: 110 [2022-10-17 10:50:17,677 INFO L226 Difference]: Without dead ends: 110 [2022-10-17 10:50:17,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-10-17 10:50:17,679 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 69 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:17,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 420 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 284 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2022-10-17 10:50:17,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-10-17 10:50:17,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 88. [2022-10-17 10:50:17,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.603448275862069) internal successors, (93), 83 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:50:17,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2022-10-17 10:50:17,701 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 26 [2022-10-17 10:50:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:17,702 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2022-10-17 10:50:17,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:50:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2022-10-17 10:50:17,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-10-17 10:50:17,704 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:17,704 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:17,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 10:50:17,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 10:50:17,918 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:17,918 INFO L85 PathProgramCache]: Analyzing trace with hash -2082132638, now seen corresponding path program 1 times [2022-10-17 10:50:17,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:17,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321996379] [2022-10-17 10:50:17,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:17,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:18,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:18,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:18,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:18,522 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:50:18,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:18,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321996379] [2022-10-17 10:50:18,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321996379] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:18,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567755977] [2022-10-17 10:50:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:18,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:18,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:18,525 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:18,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 10:50:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:18,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-17 10:50:18,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:18,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 10:50:18,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:50:18,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-10-17 10:50:18,997 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 10:50:18,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 10:50:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 10:50:19,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:50:19,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567755977] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:19,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:50:19,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2022-10-17 10:50:19,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935780028] [2022-10-17 10:50:19,190 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:50:19,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-10-17 10:50:19,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:19,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-10-17 10:50:19,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-10-17 10:50:19,191 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-17 10:50:19,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:19,607 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2022-10-17 10:50:19,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:50:19,608 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-10-17 10:50:19,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:19,609 INFO L225 Difference]: With dead ends: 90 [2022-10-17 10:50:19,609 INFO L226 Difference]: Without dead ends: 90 [2022-10-17 10:50:19,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-10-17 10:50:19,611 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 25 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:19,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 690 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 465 Invalid, 0 Unknown, 2 Unchecked, 0.3s Time] [2022-10-17 10:50:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-10-17 10:50:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-10-17 10:50:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 83 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:50:19,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2022-10-17 10:50:19,617 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 26 [2022-10-17 10:50:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:19,617 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2022-10-17 10:50:19,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-10-17 10:50:19,618 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2022-10-17 10:50:19,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-10-17 10:50:19,619 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:19,619 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:19,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 10:50:19,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:19,846 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:19,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:19,846 INFO L85 PathProgramCache]: Analyzing trace with hash 525447991, now seen corresponding path program 1 times [2022-10-17 10:50:19,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:19,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573146531] [2022-10-17 10:50:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:19,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:19,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:20,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:50:20,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:20,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573146531] [2022-10-17 10:50:20,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573146531] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:20,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358483679] [2022-10-17 10:50:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:20,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:20,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:20,028 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:20,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 10:50:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:20,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 9 conjunts are in the unsatisfiable core [2022-10-17 10:50:20,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:50:20,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:50:20,289 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:50:20,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358483679] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:50:20,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:50:20,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-10-17 10:50:20,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110981860] [2022-10-17 10:50:20,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:50:20,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 10:50:20,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:20,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 10:50:20,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-10-17 10:50:20,292 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:50:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:20,412 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2022-10-17 10:50:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:50:20,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-10-17 10:50:20,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:20,414 INFO L225 Difference]: With dead ends: 89 [2022-10-17 10:50:20,414 INFO L226 Difference]: Without dead ends: 89 [2022-10-17 10:50:20,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:50:20,415 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:20,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 433 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:50:20,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-10-17 10:50:20,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-10-17 10:50:20,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.5689655172413792) internal successors, (91), 83 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:50:20,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2022-10-17 10:50:20,421 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 28 [2022-10-17 10:50:20,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:20,422 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2022-10-17 10:50:20,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:50:20,422 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2022-10-17 10:50:20,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 10:50:20,423 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:20,424 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:20,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 10:50:20,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-10-17 10:50:20,641 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:20,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:20,641 INFO L85 PathProgramCache]: Analyzing trace with hash -895762126, now seen corresponding path program 1 times [2022-10-17 10:50:20,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:20,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304363826] [2022-10-17 10:50:20,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:20,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:20,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:20,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:20,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:50:20,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:20,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304363826] [2022-10-17 10:50:20,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304363826] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:20,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637860784] [2022-10-17 10:50:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:20,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:20,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:20,761 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:20,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 10:50:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:20,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 11 conjunts are in the unsatisfiable core [2022-10-17 10:50:20,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:50:20,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:50:20,927 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-10-17 10:50:20,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-10-17 10:50:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:50:20,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637860784] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:50:20,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:50:20,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2022-10-17 10:50:20,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431584491] [2022-10-17 10:50:20,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:50:20,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-10-17 10:50:20,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:20,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-10-17 10:50:20,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:50:20,949 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:50:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:21,081 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2022-10-17 10:50:21,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 10:50:21,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-10-17 10:50:21,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:21,083 INFO L225 Difference]: With dead ends: 113 [2022-10-17 10:50:21,083 INFO L226 Difference]: Without dead ends: 113 [2022-10-17 10:50:21,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:50:21,084 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 125 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:21,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 209 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:50:21,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-10-17 10:50:21,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 91. [2022-10-17 10:50:21,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 86 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:50:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2022-10-17 10:50:21,090 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 29 [2022-10-17 10:50:21,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:21,090 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2022-10-17 10:50:21,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:50:21,091 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2022-10-17 10:50:21,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-10-17 10:50:21,092 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:21,092 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:21,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 10:50:21,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:21,313 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:21,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:21,314 INFO L85 PathProgramCache]: Analyzing trace with hash -895762125, now seen corresponding path program 1 times [2022-10-17 10:50:21,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:21,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856644839] [2022-10-17 10:50:21,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:21,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:21,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:21,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:21,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:50:21,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:21,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856644839] [2022-10-17 10:50:21,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856644839] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:21,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338750009] [2022-10-17 10:50:21,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:21,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:21,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:21,615 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:21,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 10:50:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:21,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 16 conjunts are in the unsatisfiable core [2022-10-17 10:50:21,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:50:21,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:50:21,906 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:50:21,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-10-17 10:50:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:50:22,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338750009] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:50:22,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:50:22,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-10-17 10:50:22,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853386204] [2022-10-17 10:50:22,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:50:22,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-10-17 10:50:22,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:22,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-10-17 10:50:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:50:22,042 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-10-17 10:50:22,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:22,391 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2022-10-17 10:50:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-10-17 10:50:22,392 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-10-17 10:50:22,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:22,393 INFO L225 Difference]: With dead ends: 150 [2022-10-17 10:50:22,393 INFO L226 Difference]: Without dead ends: 150 [2022-10-17 10:50:22,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-10-17 10:50:22,394 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 200 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:22,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 748 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:50:22,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-10-17 10:50:22,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 91. [2022-10-17 10:50:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 86 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:50:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2022-10-17 10:50:22,400 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 29 [2022-10-17 10:50:22,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:22,418 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2022-10-17 10:50:22,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-10-17 10:50:22,418 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2022-10-17 10:50:22,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-17 10:50:22,419 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:22,419 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:22,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 10:50:22,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-10-17 10:50:22,642 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:22,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:22,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1998822125, now seen corresponding path program 1 times [2022-10-17 10:50:22,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:22,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177215561] [2022-10-17 10:50:22,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:22,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:22,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:22,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:22,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 10:50:22,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:22,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177215561] [2022-10-17 10:50:22,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177215561] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:22,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:22,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:50:22,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234436214] [2022-10-17 10:50:22,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:22,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:50:22,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:22,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:50:22,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:50:22,809 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:22,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:22,985 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2022-10-17 10:50:22,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:50:22,986 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-10-17 10:50:22,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:22,987 INFO L225 Difference]: With dead ends: 111 [2022-10-17 10:50:22,987 INFO L226 Difference]: Without dead ends: 111 [2022-10-17 10:50:22,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:50:22,988 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 135 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:22,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 294 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:50:22,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-10-17 10:50:22,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 90. [2022-10-17 10:50:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.540983606557377) internal successors, (94), 85 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:50:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2022-10-17 10:50:22,992 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 30 [2022-10-17 10:50:22,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:22,993 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2022-10-17 10:50:22,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2022-10-17 10:50:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-10-17 10:50:22,994 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:22,994 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:22,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-10-17 10:50:22,995 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:22,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:22,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1998822124, now seen corresponding path program 1 times [2022-10-17 10:50:22,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:22,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161347029] [2022-10-17 10:50:22,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:22,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:23,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:23,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:23,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:50:23,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:23,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161347029] [2022-10-17 10:50:23,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161347029] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:23,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:23,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-10-17 10:50:23,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771419166] [2022-10-17 10:50:23,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:23,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-10-17 10:50:23,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:23,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-10-17 10:50:23,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-10-17 10:50:23,366 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:23,545 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2022-10-17 10:50:23,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-10-17 10:50:23,546 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-10-17 10:50:23,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:23,547 INFO L225 Difference]: With dead ends: 89 [2022-10-17 10:50:23,547 INFO L226 Difference]: Without dead ends: 89 [2022-10-17 10:50:23,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-10-17 10:50:23,548 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 136 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:23,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 290 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:50:23,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-10-17 10:50:23,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-10-17 10:50:23,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 84 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:50:23,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2022-10-17 10:50:23,552 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 30 [2022-10-17 10:50:23,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:23,552 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2022-10-17 10:50:23,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:23,553 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2022-10-17 10:50:23,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-17 10:50:23,553 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:23,554 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:23,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-10-17 10:50:23,554 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:23,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:23,554 INFO L85 PathProgramCache]: Analyzing trace with hash 452746567, now seen corresponding path program 1 times [2022-10-17 10:50:23,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:23,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506532031] [2022-10-17 10:50:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:23,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:23,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:23,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:23,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-10-17 10:50:23,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:23,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506532031] [2022-10-17 10:50:23,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506532031] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:23,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:23,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 10:50:23,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436351085] [2022-10-17 10:50:23,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:23,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:50:23,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:23,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:50:23,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:50:23,779 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:24,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:24,141 INFO L93 Difference]: Finished difference Result 158 states and 173 transitions. [2022-10-17 10:50:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:50:24,142 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-10-17 10:50:24,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:24,143 INFO L225 Difference]: With dead ends: 158 [2022-10-17 10:50:24,143 INFO L226 Difference]: Without dead ends: 158 [2022-10-17 10:50:24,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:50:24,144 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 320 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:24,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 509 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:50:24,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-10-17 10:50:24,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 92. [2022-10-17 10:50:24,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.546875) internal successors, (99), 87 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:50:24,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2022-10-17 10:50:24,149 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 35 [2022-10-17 10:50:24,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:24,149 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2022-10-17 10:50:24,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:24,149 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2022-10-17 10:50:24,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-10-17 10:50:24,151 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:24,151 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:24,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-10-17 10:50:24,151 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:24,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:24,152 INFO L85 PathProgramCache]: Analyzing trace with hash 452746568, now seen corresponding path program 1 times [2022-10-17 10:50:24,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:24,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250245388] [2022-10-17 10:50:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:24,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:24,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:24,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:24,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:24,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:50:24,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:24,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250245388] [2022-10-17 10:50:24,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250245388] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:24,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:24,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 10:50:24,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575528275] [2022-10-17 10:50:24,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:24,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:50:24,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:24,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:50:24,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:50:24,556 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:24,923 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2022-10-17 10:50:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:50:24,923 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-10-17 10:50:24,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:24,924 INFO L225 Difference]: With dead ends: 138 [2022-10-17 10:50:24,925 INFO L226 Difference]: Without dead ends: 138 [2022-10-17 10:50:24,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:50:24,926 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 331 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:24,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 515 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-10-17 10:50:24,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-10-17 10:50:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 92. [2022-10-17 10:50:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.515625) internal successors, (97), 87 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:50:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2022-10-17 10:50:24,930 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 35 [2022-10-17 10:50:24,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:24,930 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2022-10-17 10:50:24,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:24,930 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2022-10-17 10:50:24,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-10-17 10:50:24,931 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:24,931 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:24,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-10-17 10:50:24,932 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:24,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:24,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1296521997, now seen corresponding path program 1 times [2022-10-17 10:50:24,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:24,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693146823] [2022-10-17 10:50:24,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:24,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:25,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:25,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:50:25,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:25,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693146823] [2022-10-17 10:50:25,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693146823] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:25,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:25,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:50:25,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144916480] [2022-10-17 10:50:25,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:25,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:50:25,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:25,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:50:25,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:50:25,057 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:25,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:25,136 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2022-10-17 10:50:25,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-10-17 10:50:25,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-10-17 10:50:25,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:25,138 INFO L225 Difference]: With dead ends: 121 [2022-10-17 10:50:25,138 INFO L226 Difference]: Without dead ends: 121 [2022-10-17 10:50:25,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:50:25,139 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 89 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:25,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 209 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:50:25,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-10-17 10:50:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 94. [2022-10-17 10:50:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.5) internal successors, (99), 89 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:50:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2022-10-17 10:50:25,144 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 37 [2022-10-17 10:50:25,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:25,144 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2022-10-17 10:50:25,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2022-10-17 10:50:25,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-10-17 10:50:25,145 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:25,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:25,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-10-17 10:50:25,146 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:25,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:25,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1577337163, now seen corresponding path program 1 times [2022-10-17 10:50:25,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:25,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11800271] [2022-10-17 10:50:25,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:25,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:25,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:25,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:50:25,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:25,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11800271] [2022-10-17 10:50:25,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11800271] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:25,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:25,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 10:50:25,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32172284] [2022-10-17 10:50:25,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:25,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 10:50:25,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:25,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 10:50:25,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-10-17 10:50:25,294 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:25,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:25,381 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2022-10-17 10:50:25,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:50:25,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-10-17 10:50:25,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:25,384 INFO L225 Difference]: With dead ends: 170 [2022-10-17 10:50:25,384 INFO L226 Difference]: Without dead ends: 170 [2022-10-17 10:50:25,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:50:25,385 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 98 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:25,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 287 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:50:25,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-10-17 10:50:25,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 95. [2022-10-17 10:50:25,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.492537313432836) internal successors, (100), 90 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-10-17 10:50:25,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2022-10-17 10:50:25,391 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 38 [2022-10-17 10:50:25,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:25,392 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2022-10-17 10:50:25,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:25,392 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2022-10-17 10:50:25,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-17 10:50:25,396 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:25,396 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:25,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-10-17 10:50:25,397 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:25,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:25,398 INFO L85 PathProgramCache]: Analyzing trace with hash -511950436, now seen corresponding path program 1 times [2022-10-17 10:50:25,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:25,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251531931] [2022-10-17 10:50:25,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:25,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:25,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:25,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:25,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:25,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-10-17 10:50:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-10-17 10:50:25,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:25,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251531931] [2022-10-17 10:50:25,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251531931] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:25,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088944230] [2022-10-17 10:50:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:25,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:25,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:25,582 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:25,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 10:50:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:25,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 5 conjunts are in the unsatisfiable core [2022-10-17 10:50:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-10-17 10:50:25,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 10:50:25,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088944230] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:25,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 10:50:25,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-10-17 10:50:25,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609443458] [2022-10-17 10:50:25,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:25,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-10-17 10:50:25,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:25,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-10-17 10:50:25,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:50:25,849 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:50:25,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:25,875 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-10-17 10:50:25,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-10-17 10:50:25,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-10-17 10:50:25,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:25,876 INFO L225 Difference]: With dead ends: 83 [2022-10-17 10:50:25,876 INFO L226 Difference]: Without dead ends: 83 [2022-10-17 10:50:25,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-10-17 10:50:25,877 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 63 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:25,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 105 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 10:50:25,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-10-17 10:50:25,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-10-17 10:50:25,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 79 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:50:25,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2022-10-17 10:50:25,880 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 41 [2022-10-17 10:50:25,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:25,881 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2022-10-17 10:50:25,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-10-17 10:50:25,881 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2022-10-17 10:50:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-17 10:50:25,881 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:25,882 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:25,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-10-17 10:50:26,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-10-17 10:50:26,082 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:26,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:26,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1002116999, now seen corresponding path program 1 times [2022-10-17 10:50:26,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:26,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008664870] [2022-10-17 10:50:26,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:26,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:26,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:26,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:26,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:26,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:26,345 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-10-17 10:50:26,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:26,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008664870] [2022-10-17 10:50:26,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008664870] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 10:50:26,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 10:50:26,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-10-17 10:50:26,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040321398] [2022-10-17 10:50:26,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 10:50:26,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:50:26,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:26,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:50:26,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:50:26,348 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:26,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:26,602 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2022-10-17 10:50:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-10-17 10:50:26,603 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-10-17 10:50:26,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:26,604 INFO L225 Difference]: With dead ends: 108 [2022-10-17 10:50:26,604 INFO L226 Difference]: Without dead ends: 108 [2022-10-17 10:50:26,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-10-17 10:50:26,605 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 289 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:26,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 317 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-10-17 10:50:26,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-10-17 10:50:26,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2022-10-17 10:50:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.4603174603174602) internal successors, (92), 82 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:50:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2022-10-17 10:50:26,609 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 42 [2022-10-17 10:50:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:26,609 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2022-10-17 10:50:26,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-10-17 10:50:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2022-10-17 10:50:26,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-10-17 10:50:26,610 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:26,610 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:26,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-10-17 10:50:26,610 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:26,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:26,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1002116998, now seen corresponding path program 1 times [2022-10-17 10:50:26,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:26,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281523701] [2022-10-17 10:50:26,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:26,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:26,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:26,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:26,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:50:26,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:26,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281523701] [2022-10-17 10:50:26,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281523701] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:26,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18006639] [2022-10-17 10:50:26,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:26,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:26,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:26,758 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:26,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 10:50:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:26,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 4 conjunts are in the unsatisfiable core [2022-10-17 10:50:26,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:50:27,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:50:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-10-17 10:50:27,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18006639] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 10:50:27,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 10:50:27,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-10-17 10:50:27,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429338779] [2022-10-17 10:50:27,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 10:50:27,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-10-17 10:50:27,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:27,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-10-17 10:50:27,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:50:27,090 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:50:27,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:27,179 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2022-10-17 10:50:27,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 10:50:27,180 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2022-10-17 10:50:27,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:27,181 INFO L225 Difference]: With dead ends: 108 [2022-10-17 10:50:27,181 INFO L226 Difference]: Without dead ends: 108 [2022-10-17 10:50:27,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-10-17 10:50:27,182 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 194 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:27,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 254 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 10:50:27,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-10-17 10:50:27,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2022-10-17 10:50:27,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 79 states have (on average 1.481012658227848) internal successors, (117), 98 states have internal predecessors, (117), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:50:27,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2022-10-17 10:50:27,186 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 42 [2022-10-17 10:50:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:27,187 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2022-10-17 10:50:27,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-10-17 10:50:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2022-10-17 10:50:27,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-17 10:50:27,188 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:27,188 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:27,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 10:50:27,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:27,406 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:27,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:27,406 INFO L85 PathProgramCache]: Analyzing trace with hash -960994977, now seen corresponding path program 1 times [2022-10-17 10:50:27,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:27,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063199023] [2022-10-17 10:50:27,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:27,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:27,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:28,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:28,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:28,531 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:50:28,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:28,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063199023] [2022-10-17 10:50:28,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063199023] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:28,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013766583] [2022-10-17 10:50:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:28,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:28,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:28,534 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:28,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 10:50:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:28,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 72 conjunts are in the unsatisfiable core [2022-10-17 10:50:28,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:28,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 10:50:28,902 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 10:50:28,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 10:50:28,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:50:28,986 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-17 10:50:28,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-10-17 10:50:29,022 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-17 10:50:29,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-10-17 10:50:29,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:50:29,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-10-17 10:50:29,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:50:29,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-10-17 10:50:29,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-10-17 10:50:29,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:50:29,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:50:32,930 INFO L356 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2022-10-17 10:50:32,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-10-17 10:50:32,936 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2201 (Array Int Int))) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_2201) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2022-10-17 10:50:32,945 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2201 (Array Int Int))) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_2201) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) is different from false [2022-10-17 10:50:32,951 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2201 (Array Int Int)) (v_ArrVal_2200 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_2200) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_2201) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) is different from false [2022-10-17 10:50:32,962 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 10:50:32,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-10-17 10:50:32,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 52 [2022-10-17 10:50:32,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-10-17 10:50:32,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2022-10-17 10:50:33,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013766583] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:33,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-10-17 10:50:33,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 29 [2022-10-17 10:50:33,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99033261] [2022-10-17 10:50:33,168 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-10-17 10:50:33,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-10-17 10:50:33,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 10:50:33,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-10-17 10:50:33,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1165, Unknown=4, NotChecked=210, Total=1482 [2022-10-17 10:50:33,170 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:50:34,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 10:50:34,695 INFO L93 Difference]: Finished difference Result 220 states and 258 transitions. [2022-10-17 10:50:34,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-10-17 10:50:34,696 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-10-17 10:50:34,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 10:50:34,698 INFO L225 Difference]: With dead ends: 220 [2022-10-17 10:50:34,698 INFO L226 Difference]: Without dead ends: 220 [2022-10-17 10:50:34,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=262, Invalid=1908, Unknown=4, NotChecked=276, Total=2450 [2022-10-17 10:50:34,700 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 631 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-10-17 10:50:34,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 1154 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-10-17 10:50:34,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-10-17 10:50:34,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 112. [2022-10-17 10:50:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 89 states have (on average 1.4831460674157304) internal successors, (132), 108 states have internal predecessors, (132), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:50:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2022-10-17 10:50:34,708 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 43 [2022-10-17 10:50:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 10:50:34,708 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2022-10-17 10:50:34,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 10:50:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2022-10-17 10:50:34,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-10-17 10:50:34,711 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 10:50:34,711 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 10:50:34,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 10:50:34,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:34,926 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-10-17 10:50:34,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 10:50:34,926 INFO L85 PathProgramCache]: Analyzing trace with hash -960994976, now seen corresponding path program 1 times [2022-10-17 10:50:34,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 10:50:34,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974495906] [2022-10-17 10:50:34,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:34,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 10:50:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:36,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-10-17 10:50:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:36,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-10-17 10:50:36,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:36,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:50:36,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 10:50:36,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974495906] [2022-10-17 10:50:36,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974495906] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 10:50:36,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112340970] [2022-10-17 10:50:36,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 10:50:36,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 10:50:36,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 10:50:36,883 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 10:50:36,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bb781e47-c9d1-494a-917c-e6aa874d8d0e/bin/uautomizer-J5u9QxTXDZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-10-17 10:50:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 10:50:37,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 98 conjunts are in the unsatisfiable core [2022-10-17 10:50:37,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 10:50:37,119 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-10-17 10:50:37,559 INFO L356 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-10-17 10:50:37,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2022-10-17 10:50:37,585 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-10-17 10:50:37,586 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-10-17 10:50:37,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:50:37,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-10-17 10:50:37,834 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-17 10:50:37,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 42 [2022-10-17 10:50:37,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-10-17 10:50:38,022 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-10-17 10:50:38,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-10-17 10:50:38,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-10-17 10:50:38,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-10-17 10:50:38,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 10:50:38,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:50:38,347 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-10-17 10:50:38,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 10:50:38,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2022-10-17 10:50:38,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-10-17 10:50:38,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-10-17 10:50:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 10:50:38,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 10:50:39,813 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~s~0#1.base|))) (and (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_2400 Int)) (<= 0 (+ 8 (select (store .cse0 (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| 8) v_ArrVal_2400) |c_ULTIMATE.start_main_~s~0#1.offset|)))))) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| |c_ULTIMATE.start_main_~s~0#1.offset|) (forall ((v_ArrVal_2401 Int) (v_ArrVal_2400 Int)) (let ((.cse1 (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| 8))) (<= (+ 12 (select (store .cse0 .cse1 v_ArrVal_2400) |c_ULTIMATE.start_main_~s~0#1.offset|)) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) .cse1 v_ArrVal_2401) |c_ULTIMATE.start_main_~s~0#1.offset|))))))))) is different from false [2022-10-17 10:50:40,689 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_#res#1.base|))) (and (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| Int)) (or (forall ((v_ArrVal_2401 Int) (v_ArrVal_2400 Int)) (let ((.cse1 (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| 8))) (<= (+ (select (store .cse0 .cse1 v_ArrVal_2400) |c_ULTIMATE.start_dll_circular_create_#res#1.offset|) 12) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_#res#1.base|) .cse1 v_ArrVal_2401) |c_ULTIMATE.start_dll_circular_create_#res#1.offset|))))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| |c_ULTIMATE.start_dll_circular_create_#res#1.offset|))) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| |c_ULTIMATE.start_dll_circular_create_#res#1.offset|) (forall ((v_ArrVal_2400 Int)) (<= 0 (+ (select (store .cse0 (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| 8) v_ArrVal_2400) |c_ULTIMATE.start_dll_circular_create_#res#1.offset|) 8))))))) is different from false [2022-10-17 10:50:42,714 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (and (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (forall ((v_ArrVal_2400 Int)) (<= 0 (+ 8 (select (store .cse0 (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| 8) v_ArrVal_2400) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)))))) (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| Int)) (or (forall ((v_ArrVal_2401 Int) (v_ArrVal_2400 Int)) (let ((.cse1 (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| 8))) (<= (+ 12 (select (store .cse0 .cse1 v_ArrVal_2400) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (select |c_#length| (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) .cse1 v_ArrVal_2401) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_14| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))))) is different from false