./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_append_equal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_append_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc --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 f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 --- 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-5e519f3 [2022-11-02 20:42:30,833 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:42:30,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:42:30,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:42:30,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:42:30,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:42:30,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:42:30,904 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:42:30,907 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:42:30,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:42:30,915 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:42:30,916 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:42:30,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:42:30,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:42:30,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:42:30,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:42:30,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:42:30,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:42:30,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:42:30,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:42:30,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:42:30,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:42:30,942 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:42:30,944 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:42:30,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:42:30,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:42:30,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:42:30,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:42:30,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:42:30,954 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:42:30,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:42:30,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:42:30,957 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:42:30,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:42:30,960 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:42:30,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:42:30,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:42:30,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:42:30,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:42:30,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:42:30,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:42:30,965 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-02 20:42:30,999 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:42:31,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:42:31,000 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:42:31,000 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:42:31,001 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:42:31,001 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:42:31,002 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:42:31,002 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:42:31,002 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:42:31,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:42:31,002 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:42:31,003 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-02 20:42:31,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:42:31,003 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:42:31,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:42:31,003 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-02 20:42:31,003 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-02 20:42:31,004 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-02 20:42:31,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:42:31,004 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:42:31,004 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:42:31,004 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:42:31,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:42:31,005 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:42:31,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:42:31,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:42:31,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:42:31,013 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:42:31,013 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:42:31,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:42:31,013 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_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f218eac2d2b52810cb44bb8b3f3f80463ec7e46c8818b20f079ed947cc8e9fd0 [2022-11-02 20:42:31,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:42:31,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:42:31,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:42:31,366 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:42:31,366 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:42:31,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/list-simple/sll2n_append_equal.i [2022-11-02 20:42:31,439 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/data/769989fbc/48da06c1b5f2482eaf799b2299d33c3a/FLAG470be3d80 [2022-11-02 20:42:32,080 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:42:32,081 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/sv-benchmarks/c/list-simple/sll2n_append_equal.i [2022-11-02 20:42:32,095 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/data/769989fbc/48da06c1b5f2482eaf799b2299d33c3a/FLAG470be3d80 [2022-11-02 20:42:32,348 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/data/769989fbc/48da06c1b5f2482eaf799b2299d33c3a [2022-11-02 20:42:32,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:42:32,352 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:42:32,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:42:32,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:42:32,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:42:32,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:42:32" (1/1) ... [2022-11-02 20:42:32,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@157d3090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:32, skipping insertion in model container [2022-11-02 20:42:32,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:42:32" (1/1) ... [2022-11-02 20:42:32,370 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:42:32,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:42:32,858 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_2153aada-91d2-48d9-9dc1-2561300c630d/sv-benchmarks/c/list-simple/sll2n_append_equal.i[24197,24210] [2022-11-02 20:42:32,863 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:42:32,880 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:42:32,936 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_2153aada-91d2-48d9-9dc1-2561300c630d/sv-benchmarks/c/list-simple/sll2n_append_equal.i[24197,24210] [2022-11-02 20:42:32,937 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:42:32,961 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:42:32,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:32 WrapperNode [2022-11-02 20:42:32,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:42:32,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:42:32,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:42:32,963 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:42:32,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:32" (1/1) ... [2022-11-02 20:42:33,005 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:32" (1/1) ... [2022-11-02 20:42:33,039 INFO L138 Inliner]: procedures = 127, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 121 [2022-11-02 20:42:33,040 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:42:33,041 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:42:33,041 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:42:33,041 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:42:33,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:32" (1/1) ... [2022-11-02 20:42:33,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:32" (1/1) ... [2022-11-02 20:42:33,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:32" (1/1) ... [2022-11-02 20:42:33,068 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:32" (1/1) ... [2022-11-02 20:42:33,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:32" (1/1) ... [2022-11-02 20:42:33,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:32" (1/1) ... [2022-11-02 20:42:33,090 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:32" (1/1) ... [2022-11-02 20:42:33,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:32" (1/1) ... [2022-11-02 20:42:33,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:42:33,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:42:33,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:42:33,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:42:33,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:32" (1/1) ... [2022-11-02 20:42:33,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:42:33,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:33,139 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:42:33,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:42:33,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:42:33,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:42:33,189 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-11-02 20:42:33,189 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-11-02 20:42:33,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:42:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:42:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:42:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-02 20:42:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-02 20:42:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:42:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-02 20:42:33,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:42:33,191 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:42:33,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:42:33,402 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:42:33,419 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:42:33,724 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:42:33,734 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:42:33,735 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-02 20:42:33,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:42:33 BoogieIcfgContainer [2022-11-02 20:42:33,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:42:33,739 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:42:33,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:42:33,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:42:33,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:42:32" (1/3) ... [2022-11-02 20:42:33,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fadc527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:42:33, skipping insertion in model container [2022-11-02 20:42:33,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:42:32" (2/3) ... [2022-11-02 20:42:33,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fadc527 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:42:33, skipping insertion in model container [2022-11-02 20:42:33,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:42:33" (3/3) ... [2022-11-02 20:42:33,752 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_append_equal.i [2022-11-02 20:42:33,773 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:42:33,773 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2022-11-02 20:42:33,828 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:42:33,835 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;@6b9628f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:42:33,835 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-11-02 20:42:33,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 85 states, 48 states have (on average 1.9375) internal successors, (93), 81 states have internal predecessors, (93), 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) [2022-11-02 20:42:33,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:42:33,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:33,848 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:33,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:42:33,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:33,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1813904761, now seen corresponding path program 1 times [2022-11-02 20:42:33,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:33,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236763930] [2022-11-02 20:42:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:33,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:34,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:34,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:34,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236763930] [2022-11-02 20:42:34,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236763930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:34,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:34,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:42:34,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465379191] [2022-11-02 20:42:34,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:34,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:42:34,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:34,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:42:34,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:42:34,304 INFO L87 Difference]: Start difference. First operand has 85 states, 48 states have (on average 1.9375) internal successors, (93), 81 states have internal predecessors, (93), 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 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:42:34,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:34,458 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-11-02 20:42:34,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:42:34,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2022-11-02 20:42:34,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:34,470 INFO L225 Difference]: With dead ends: 83 [2022-11-02 20:42:34,470 INFO L226 Difference]: Without dead ends: 80 [2022-11-02 20:42:34,472 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 [2022-11-02 20:42:34,476 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 8 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:34,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 130 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:42:34,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-02 20:42:34,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-02 20:42:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 76 states have internal predecessors, (82), 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) [2022-11-02 20:42:34,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 86 transitions. [2022-11-02 20:42:34,529 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 86 transitions. Word has length 7 [2022-11-02 20:42:34,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:34,530 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 86 transitions. [2022-11-02 20:42:34,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:42:34,531 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 86 transitions. [2022-11-02 20:42:34,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-02 20:42:34,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:34,532 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:34,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:42:34,533 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:42:34,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:34,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1813904762, now seen corresponding path program 1 times [2022-11-02 20:42:34,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:34,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145918750] [2022-11-02 20:42:34,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:34,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:34,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:34,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145918750] [2022-11-02 20:42:34,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145918750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:34,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:34,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:42:34,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106252732] [2022-11-02 20:42:34,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:34,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:42:34,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:34,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:42:34,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:42:34,692 INFO L87 Difference]: Start difference. First operand 80 states and 86 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:42:34,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:34,755 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2022-11-02 20:42:34,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:42:34,755 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 7 [2022-11-02 20:42:34,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:34,757 INFO L225 Difference]: With dead ends: 78 [2022-11-02 20:42:34,757 INFO L226 Difference]: Without dead ends: 78 [2022-11-02 20:42:34,757 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 [2022-11-02 20:42:34,759 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 4 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:34,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 130 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:42:34,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-02 20:42:34,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-02 20:42:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 46 states have (on average 1.7391304347826086) internal successors, (80), 74 states have internal predecessors, (80), 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) [2022-11-02 20:42:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2022-11-02 20:42:34,767 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 7 [2022-11-02 20:42:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:34,767 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2022-11-02 20:42:34,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-02 20:42:34,768 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2022-11-02 20:42:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:42:34,769 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:34,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:34,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:42:34,769 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:42:34,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:34,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1961810752, now seen corresponding path program 1 times [2022-11-02 20:42:34,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:34,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984706395] [2022-11-02 20:42:34,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:34,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:34,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:42:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:35,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:35,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984706395] [2022-11-02 20:42:35,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984706395] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:35,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:35,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:42:35,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776309993] [2022-11-02 20:42:35,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:35,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:42:35,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:35,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:42:35,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:42:35,023 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-02 20:42:35,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:35,285 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-11-02 20:42:35,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:42:35,286 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2022-11-02 20:42:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:35,293 INFO L225 Difference]: With dead ends: 82 [2022-11-02 20:42:35,293 INFO L226 Difference]: Without dead ends: 82 [2022-11-02 20:42:35,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:42:35,299 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 11 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:35,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 300 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:42:35,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-02 20:42:35,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-11-02 20:42:35,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 73 states have internal predecessors, (79), 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) [2022-11-02 20:42:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2022-11-02 20:42:35,313 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 13 [2022-11-02 20:42:35,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:35,314 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2022-11-02 20:42:35,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-02 20:42:35,314 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2022-11-02 20:42:35,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:42:35,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:35,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:35,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:42:35,316 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:42:35,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:35,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1961810753, now seen corresponding path program 1 times [2022-11-02 20:42:35,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:35,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954855215] [2022-11-02 20:42:35,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:35,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:35,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:42:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:35,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:35,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954855215] [2022-11-02 20:42:35,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954855215] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:35,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:35,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:42:35,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888024186] [2022-11-02 20:42:35,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:35,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:42:35,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:35,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:42:35,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:42:35,713 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-02 20:42:35,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:35,976 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2022-11-02 20:42:35,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:42:35,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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 13 [2022-11-02 20:42:35,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:35,978 INFO L225 Difference]: With dead ends: 81 [2022-11-02 20:42:35,978 INFO L226 Difference]: Without dead ends: 81 [2022-11-02 20:42:35,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:42:35,980 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 9 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:35,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 316 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:42:35,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-02 20:42:35,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2022-11-02 20:42:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 72 states have internal predecessors, (78), 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) [2022-11-02 20:42:35,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 82 transitions. [2022-11-02 20:42:35,991 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 82 transitions. Word has length 13 [2022-11-02 20:42:35,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:35,992 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 82 transitions. [2022-11-02 20:42:35,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 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) [2022-11-02 20:42:35,992 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 82 transitions. [2022-11-02 20:42:35,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:42:35,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:35,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:35,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:42:35,994 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:42:35,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:35,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1399608384, now seen corresponding path program 1 times [2022-11-02 20:42:35,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:35,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700534868] [2022-11-02 20:42:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:35,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:36,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 20:42:36,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:36,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:36,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700534868] [2022-11-02 20:42:36,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700534868] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:36,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:36,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:42:36,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735786179] [2022-11-02 20:42:36,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:36,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:42:36,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:36,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:42:36,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:42:36,082 INFO L87 Difference]: Start difference. First operand 76 states and 82 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-11-02 20:42:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:36,163 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2022-11-02 20:42:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:42:36,165 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 15 [2022-11-02 20:42:36,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:36,169 INFO L225 Difference]: With dead ends: 82 [2022-11-02 20:42:36,169 INFO L226 Difference]: Without dead ends: 82 [2022-11-02 20:42:36,170 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 [2022-11-02 20:42:36,172 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 4 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:36,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 192 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:42:36,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-02 20:42:36,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-11-02 20:42:36,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 47 states have (on average 1.6808510638297873) internal successors, (79), 73 states have internal predecessors, (79), 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) [2022-11-02 20:42:36,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2022-11-02 20:42:36,189 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 15 [2022-11-02 20:42:36,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:36,189 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2022-11-02 20:42:36,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-11-02 20:42:36,190 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2022-11-02 20:42:36,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:42:36,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:36,191 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:36,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 20:42:36,191 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:42:36,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:36,192 INFO L85 PathProgramCache]: Analyzing trace with hash -898428094, now seen corresponding path program 1 times [2022-11-02 20:42:36,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:36,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825775229] [2022-11-02 20:42:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:36,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:36,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:42:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:36,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:42:36,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:36,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:42:36,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:36,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825775229] [2022-11-02 20:42:36,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825775229] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:36,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047721102] [2022-11-02 20:42:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:36,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:36,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:36,349 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:36,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:42:36,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:36,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:42:36,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:36,543 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:36,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:36,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:42:36,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047721102] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:36,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:42:36,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2022-11-02 20:42:36,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874527532] [2022-11-02 20:42:36,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:36,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:42:36,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:36,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:42:36,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:42:36,586 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:42:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:36,693 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-11-02 20:42:36,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:42:36,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2022-11-02 20:42:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:36,695 INFO L225 Difference]: With dead ends: 83 [2022-11-02 20:42:36,695 INFO L226 Difference]: Without dead ends: 83 [2022-11-02 20:42:36,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:42:36,696 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 8 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:36,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 267 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:42:36,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-02 20:42:36,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-02 20:42:36,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 52 states have (on average 1.6153846153846154) internal successors, (84), 78 states have internal predecessors, (84), 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) [2022-11-02 20:42:36,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2022-11-02 20:42:36,703 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 28 [2022-11-02 20:42:36,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:36,703 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2022-11-02 20:42:36,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:42:36,704 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2022-11-02 20:42:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:42:36,705 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:36,705 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:36,739 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 20:42:36,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:36,926 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:42:36,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:36,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1437186176, now seen corresponding path program 2 times [2022-11-02 20:42:36,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:36,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498904140] [2022-11-02 20:42:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:36,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:37,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:42:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:37,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:42:37,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:37,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:42:37,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:37,691 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-02 20:42:37,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:37,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498904140] [2022-11-02 20:42:37,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498904140] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:37,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:37,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:42:37,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813962783] [2022-11-02 20:42:37,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:37,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:42:37,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:37,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:42:37,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:42:37,694 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2022-11-02 20:42:37,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:37,891 INFO L93 Difference]: Finished difference Result 90 states and 98 transitions. [2022-11-02 20:42:37,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:42:37,892 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) Word has length 41 [2022-11-02 20:42:37,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:37,893 INFO L225 Difference]: With dead ends: 90 [2022-11-02 20:42:37,893 INFO L226 Difference]: Without dead ends: 90 [2022-11-02 20:42:37,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:42:37,895 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 113 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:37,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 173 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:42:37,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-02 20:42:37,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2022-11-02 20:42:37,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 73 states have internal predecessors, (79), 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) [2022-11-02 20:42:37,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2022-11-02 20:42:37,914 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 41 [2022-11-02 20:42:37,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:37,915 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2022-11-02 20:42:37,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 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) [2022-11-02 20:42:37,916 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2022-11-02 20:42:37,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-02 20:42:37,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:37,922 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:37,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-02 20:42:37,923 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:42:37,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:37,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1437186175, now seen corresponding path program 1 times [2022-11-02 20:42:37,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:37,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122108672] [2022-11-02 20:42:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:37,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:37,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:38,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:42:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:38,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:42:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:38,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:42:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:38,772 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:42:38,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:38,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122108672] [2022-11-02 20:42:38,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122108672] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:38,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718982835] [2022-11-02 20:42:38,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:38,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:38,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:38,779 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:38,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:42:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:38,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-02 20:42:38,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:38,979 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 [2022-11-02 20:42:39,028 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 5 treesize of output 3 [2022-11-02 20:42:39,199 WARN L833 $PredicateComparison]: unable to prove that (and (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#s~0#1.base|) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (exists ((|v_#length_BEFORE_CALL_2| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_2| |c_#length|))) (and (<= (+ .cse0 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_2| .cse0 (select |c_#length| .cse0))) (<= 4 (select |v_#length_BEFORE_CALL_2| |c_ULTIMATE.start_main_~#s~0#1.base|))))) (<= 4 (select |c_#length| |c_ULTIMATE.start_main_~#s~0#1.base|)))) is different from false [2022-11-02 20:42:39,202 WARN L855 $PredicateComparison]: unable to prove that (and (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#s~0#1.base|) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (exists ((|v_#length_BEFORE_CALL_2| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_2| |c_#length|))) (and (<= (+ .cse0 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_2| .cse0 (select |c_#length| .cse0))) (<= 4 (select |v_#length_BEFORE_CALL_2| |c_ULTIMATE.start_main_~#s~0#1.base|))))) (<= 4 (select |c_#length| |c_ULTIMATE.start_main_~#s~0#1.base|)))) is different from true [2022-11-02 20:42:39,259 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 5 treesize of output 3 [2022-11-02 20:42:39,398 WARN L833 $PredicateComparison]: unable to prove that (and (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#s~0#1.base|) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (exists ((|v_#length_BEFORE_CALL_4| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_4| |c_#length|))) (and (<= 4 (select |v_#length_BEFORE_CALL_4| |c_ULTIMATE.start_main_~#s~0#1.base|)) (<= (+ .cse0 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_4| .cse0 (select |c_#length| .cse0)))))) (<= 4 (select |c_#length| |c_ULTIMATE.start_main_~#s~0#1.base|)))) is different from false [2022-11-02 20:42:39,404 WARN L855 $PredicateComparison]: unable to prove that (and (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#s~0#1.base|) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (exists ((|v_#length_BEFORE_CALL_4| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_4| |c_#length|))) (and (<= 4 (select |v_#length_BEFORE_CALL_4| |c_ULTIMATE.start_main_~#s~0#1.base|)) (<= (+ .cse0 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_4| .cse0 (select |c_#length| .cse0)))))) (<= 4 (select |c_#length| |c_ULTIMATE.start_main_~#s~0#1.base|)))) is different from true [2022-11-02 20:42:39,505 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 5 treesize of output 3 [2022-11-02 20:42:39,669 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 1 not checked. [2022-11-02 20:42:39,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:41,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718982835] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:41,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:41,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-11-02 20:42:41,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251858607] [2022-11-02 20:42:41,907 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:41,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 20:42:41,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:41,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 20:42:41,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=217, Unknown=4, NotChecked=62, Total=342 [2022-11-02 20:42:41,909 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 17 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:42:41,984 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#length| |c_ULTIMATE.start_main_~#s~0#1.base|))) (let ((.cse1 (<= 4 .cse3))) (and (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#s~0#1.base|) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (exists ((|v_#length_BEFORE_CALL_2| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_2| |c_#length|))) (and (<= (+ .cse0 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_2| .cse0 (select |c_#length| .cse0))) (<= 4 (select |v_#length_BEFORE_CALL_2| |c_ULTIMATE.start_main_~#s~0#1.base|))))) .cse1) (or (exists ((|v_#length_BEFORE_CALL_4| (Array Int Int))) (let ((.cse2 (@diff |v_#length_BEFORE_CALL_4| |c_#length|))) (and (<= 4 (select |v_#length_BEFORE_CALL_4| |c_ULTIMATE.start_main_~#s~0#1.base|)) (<= (+ .cse2 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_4| .cse2 (select |c_#length| .cse2)))))) .cse1) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|) (= .cse3 4)))) is different from false [2022-11-02 20:42:41,987 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#length| |c_ULTIMATE.start_main_~#s~0#1.base|))) (let ((.cse1 (<= 4 .cse3))) (and (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (< |c_#StackHeapBarrier| |c_ULTIMATE.start_main_~#s~0#1.base|) (= |c_ULTIMATE.start_main_~#s~0#1.offset| 0) (or (exists ((|v_#length_BEFORE_CALL_2| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_2| |c_#length|))) (and (<= (+ .cse0 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_2| .cse0 (select |c_#length| .cse0))) (<= 4 (select |v_#length_BEFORE_CALL_2| |c_ULTIMATE.start_main_~#s~0#1.base|))))) .cse1) (or (exists ((|v_#length_BEFORE_CALL_4| (Array Int Int))) (let ((.cse2 (@diff |v_#length_BEFORE_CALL_4| |c_#length|))) (and (<= 4 (select |v_#length_BEFORE_CALL_4| |c_ULTIMATE.start_main_~#s~0#1.base|)) (<= (+ .cse2 1) |c_#StackHeapBarrier|) (= |c_#length| (store |v_#length_BEFORE_CALL_4| .cse2 (select |c_#length| .cse2)))))) .cse1) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|) (= .cse3 4)))) is different from true [2022-11-02 20:42:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:42,270 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2022-11-02 20:42:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:42:42,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2022-11-02 20:42:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:42,272 INFO L225 Difference]: With dead ends: 85 [2022-11-02 20:42:42,272 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:42:42,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=83, Invalid=265, Unknown=6, NotChecked=108, Total=462 [2022-11-02 20:42:42,273 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 307 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:42,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 178 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 244 Invalid, 0 Unknown, 141 Unchecked, 0.3s Time] [2022-11-02 20:42:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:42:42,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 73. [2022-11-02 20:42:42,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 52 states have (on average 1.4230769230769231) internal successors, (74), 68 states have internal predecessors, (74), 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) [2022-11-02 20:42:42,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 80 transitions. [2022-11-02 20:42:42,277 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 80 transitions. Word has length 41 [2022-11-02 20:42:42,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:42,277 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 80 transitions. [2022-11-02 20:42:42,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:42:42,278 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 80 transitions. [2022-11-02 20:42:42,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:42:42,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:42,278 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:42,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:42,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:42,479 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:42:42,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:42,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2129253767, now seen corresponding path program 1 times [2022-11-02 20:42:42,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:42,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002916142] [2022-11-02 20:42:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:42,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:43,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:42:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:43,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:42:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:43,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:42:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:42:43,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:43,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002916142] [2022-11-02 20:42:43,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002916142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:43,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263619943] [2022-11-02 20:42:43,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:43,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:43,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:43,867 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:43,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:42:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:44,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-02 20:42:44,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:44,608 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 19 treesize of output 11 [2022-11-02 20:42:44,616 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 7 treesize of output 3 [2022-11-02 20:42:44,799 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_616 (Array Int Int)) (v_ArrVal_615 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_615)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_616)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-11-02 20:42:44,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:44,889 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 25 treesize of output 25 [2022-11-02 20:42:44,904 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-02 20:42:44,905 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 15 treesize of output 15 [2022-11-02 20:42:44,912 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 18 treesize of output 13 [2022-11-02 20:42:44,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:44,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:42:45,005 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 15 treesize of output 7 [2022-11-02 20:42:45,012 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 17 treesize of output 9 [2022-11-02 20:42:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2022-11-02 20:42:45,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:46,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263619943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:46,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:42:46,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2022-11-02 20:42:46,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017864337] [2022-11-02 20:42:46,926 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:46,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-02 20:42:46,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:46,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-02 20:42:46,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1084, Unknown=1, NotChecked=66, Total=1260 [2022-11-02 20:42:46,928 INFO L87 Difference]: Start difference. First operand 73 states and 80 transitions. Second operand has 32 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:42:48,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:48,763 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2022-11-02 20:42:48,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:42:48,764 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2022-11-02 20:42:48,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:48,764 INFO L225 Difference]: With dead ends: 112 [2022-11-02 20:42:48,765 INFO L226 Difference]: Without dead ends: 112 [2022-11-02 20:42:48,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=241, Invalid=2018, Unknown=1, NotChecked=92, Total=2352 [2022-11-02 20:42:48,766 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 331 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:48,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 924 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 996 Invalid, 0 Unknown, 104 Unchecked, 0.9s Time] [2022-11-02 20:42:48,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-02 20:42:48,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 77. [2022-11-02 20:42:48,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 72 states have internal predecessors, (82), 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) [2022-11-02 20:42:48,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2022-11-02 20:42:48,770 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 45 [2022-11-02 20:42:48,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:48,771 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2022-11-02 20:42:48,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:42:48,771 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2022-11-02 20:42:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-02 20:42:48,772 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:48,772 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:48,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:48,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 20:42:48,983 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:42:48,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:48,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2129253766, now seen corresponding path program 1 times [2022-11-02 20:42:48,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:48,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682215868] [2022-11-02 20:42:48,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:48,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:49,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:42:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:49,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:42:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:49,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:42:49,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:49,750 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:42:49,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:49,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682215868] [2022-11-02 20:42:49,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682215868] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:49,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738660594] [2022-11-02 20:42:49,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:49,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:49,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:49,752 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:49,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:42:49,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:49,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-02 20:42:49,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:50,198 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 9 treesize of output 5 [2022-11-02 20:42:50,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:50,490 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 16 treesize of output 18 [2022-11-02 20:42:50,508 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-11-02 20:42:50,509 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 16 treesize of output 18 [2022-11-02 20:42:50,655 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 17 treesize of output 9 [2022-11-02 20:42:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:42:50,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:42:50,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738660594] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:50,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:42:50,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 26 [2022-11-02 20:42:50,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916998566] [2022-11-02 20:42:50,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:50,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 20:42:50,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:50,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 20:42:50,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=622, Unknown=2, NotChecked=0, Total=702 [2022-11-02 20:42:50,675 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:50,971 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2022-11-02 20:42:50,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:42:50,972 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-11-02 20:42:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:50,973 INFO L225 Difference]: With dead ends: 104 [2022-11-02 20:42:50,973 INFO L226 Difference]: Without dead ends: 104 [2022-11-02 20:42:50,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=756, Unknown=2, NotChecked=0, Total=870 [2022-11-02 20:42:50,974 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 49 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:50,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 590 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 299 Invalid, 0 Unknown, 144 Unchecked, 0.2s Time] [2022-11-02 20:42:50,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-02 20:42:50,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2022-11-02 20:42:50,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.375) internal successors, (77), 70 states have internal predecessors, (77), 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) [2022-11-02 20:42:50,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2022-11-02 20:42:50,978 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 45 [2022-11-02 20:42:50,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:50,978 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2022-11-02 20:42:50,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 13 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:50,979 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2022-11-02 20:42:50,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:42:50,979 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:50,980 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:51,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:51,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:42:51,195 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:42:51,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:51,195 INFO L85 PathProgramCache]: Analyzing trace with hash -35949242, now seen corresponding path program 1 times [2022-11-02 20:42:51,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:51,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536734346] [2022-11-02 20:42:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:51,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:51,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:51,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:42:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:51,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:42:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:51,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:42:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:51,524 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-02 20:42:51,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:51,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536734346] [2022-11-02 20:42:51,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536734346] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:51,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:51,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 20:42:51,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206520910] [2022-11-02 20:42:51,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:51,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:42:51,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:51,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:42:51,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:42:51,527 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:51,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:51,836 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2022-11-02 20:42:51,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:42:51,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-11-02 20:42:51,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:51,838 INFO L225 Difference]: With dead ends: 136 [2022-11-02 20:42:51,838 INFO L226 Difference]: Without dead ends: 136 [2022-11-02 20:42:51,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:42:51,839 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 232 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:51,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 301 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:42:51,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-02 20:42:51,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 79. [2022-11-02 20:42:51,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.360655737704918) internal successors, (83), 74 states have internal predecessors, (83), 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) [2022-11-02 20:42:51,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2022-11-02 20:42:51,843 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 48 [2022-11-02 20:42:51,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:51,843 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2022-11-02 20:42:51,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2022-11-02 20:42:51,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:42:51,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:51,844 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:51,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-02 20:42:51,845 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:42:51,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:51,845 INFO L85 PathProgramCache]: Analyzing trace with hash -35949241, now seen corresponding path program 1 times [2022-11-02 20:42:51,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:51,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218839851] [2022-11-02 20:42:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:51,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:52,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:42:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:52,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:42:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:52,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:42:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:52,454 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:42:52,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:52,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218839851] [2022-11-02 20:42:52,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218839851] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:52,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:52,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-02 20:42:52,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155723052] [2022-11-02 20:42:52,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:52,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:42:52,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:52,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:42:52,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:42:52,457 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:52,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:52,778 INFO L93 Difference]: Finished difference Result 126 states and 139 transitions. [2022-11-02 20:42:52,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:42:52,779 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-11-02 20:42:52,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:52,780 INFO L225 Difference]: With dead ends: 126 [2022-11-02 20:42:52,780 INFO L226 Difference]: Without dead ends: 126 [2022-11-02 20:42:52,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:42:52,781 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 219 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:52,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 313 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:42:52,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-02 20:42:52,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 81. [2022-11-02 20:42:52,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 76 states have internal predecessors, (84), 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) [2022-11-02 20:42:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2022-11-02 20:42:52,784 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 48 [2022-11-02 20:42:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:52,784 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2022-11-02 20:42:52,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2022-11-02 20:42:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 20:42:52,785 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:52,786 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:52,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-02 20:42:52,786 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:42:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:52,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1114427801, now seen corresponding path program 1 times [2022-11-02 20:42:52,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:52,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865672315] [2022-11-02 20:42:52,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:52,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:52,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:53,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:42:53,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:53,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:42:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:53,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:42:53,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:53,111 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:42:53,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:53,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865672315] [2022-11-02 20:42:53,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865672315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:42:53,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:42:53,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 20:42:53,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681292545] [2022-11-02 20:42:53,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:42:53,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:42:53,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:53,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:42:53,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:42:53,114 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:53,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:53,363 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2022-11-02 20:42:53,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:42:53,363 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-11-02 20:42:53,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:53,364 INFO L225 Difference]: With dead ends: 109 [2022-11-02 20:42:53,364 INFO L226 Difference]: Without dead ends: 109 [2022-11-02 20:42:53,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:42:53,365 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 151 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:53,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 508 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:42:53,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-02 20:42:53,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 81. [2022-11-02 20:42:53,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.3174603174603174) internal successors, (83), 76 states have internal predecessors, (83), 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) [2022-11-02 20:42:53,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2022-11-02 20:42:53,368 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 49 [2022-11-02 20:42:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:53,369 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2022-11-02 20:42:53,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:42:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2022-11-02 20:42:53,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 20:42:53,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:53,370 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:53,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-02 20:42:53,370 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:42:53,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:53,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1553828739, now seen corresponding path program 1 times [2022-11-02 20:42:53,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:53,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334708553] [2022-11-02 20:42:53,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:53,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:54,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:42:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:55,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:42:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:55,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:42:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:55,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:42:55,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:55,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334708553] [2022-11-02 20:42:55,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334708553] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:55,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820865203] [2022-11-02 20:42:55,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:55,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:55,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:55,990 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:55,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:42:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:56,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-02 20:42:56,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:56,735 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:42:56,736 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 [2022-11-02 20:42:56,752 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 [2022-11-02 20:42:56,954 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 13 treesize of output 9 [2022-11-02 20:42:56,962 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 13 treesize of output 9 [2022-11-02 20:42:57,526 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:42:57,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 38 [2022-11-02 20:42:57,539 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:42:57,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 16 [2022-11-02 20:42:58,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:58,035 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-02 20:42:58,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 69 [2022-11-02 20:42:58,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:58,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:58,053 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:42:58,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2022-11-02 20:42:58,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:58,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-02 20:42:58,080 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-11-02 20:42:58,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2022-11-02 20:42:58,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:42:58,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:42:58,477 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:42:58,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 47 [2022-11-02 20:42:58,490 INFO L356 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-11-02 20:42:58,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 27 [2022-11-02 20:42:58,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:58,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:00,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820865203] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:00,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:00,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 48 [2022-11-02 20:43:00,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445119848] [2022-11-02 20:43:00,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:00,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-02 20:43:00,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:00,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-02 20:43:00,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2587, Unknown=8, NotChecked=0, Total=2756 [2022-11-02 20:43:00,460 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 49 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 43 states have internal predecessors, (85), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:43:03,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:03,435 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2022-11-02 20:43:03,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:43:03,436 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 43 states have internal predecessors, (85), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2022-11-02 20:43:03,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:03,437 INFO L225 Difference]: With dead ends: 144 [2022-11-02 20:43:03,437 INFO L226 Difference]: Without dead ends: 144 [2022-11-02 20:43:03,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=365, Invalid=4597, Unknown=8, NotChecked=0, Total=4970 [2022-11-02 20:43:03,440 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 140 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:03,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1606 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 863 Invalid, 0 Unknown, 248 Unchecked, 0.8s Time] [2022-11-02 20:43:03,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-02 20:43:03,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 80. [2022-11-02 20:43:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.296875) internal successors, (83), 75 states have internal predecessors, (83), 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) [2022-11-02 20:43:03,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2022-11-02 20:43:03,443 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 49 [2022-11-02 20:43:03,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:03,444 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2022-11-02 20:43:03,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 1.8478260869565217) internal successors, (85), 43 states have internal predecessors, (85), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:43:03,444 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2022-11-02 20:43:03,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-02 20:43:03,444 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:03,445 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:03,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:03,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:43:03,667 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:43:03,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:03,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1553828740, now seen corresponding path program 1 times [2022-11-02 20:43:03,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:03,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196141937] [2022-11-02 20:43:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:03,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:04,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:43:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:04,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:43:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:05,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:43:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:05,777 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:43:05,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:05,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196141937] [2022-11-02 20:43:05,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196141937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:05,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28384300] [2022-11-02 20:43:05,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:05,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:05,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:05,783 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:05,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:43:05,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:05,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-02 20:43:06,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:06,371 INFO L356 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-02 20:43:06,372 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 19 treesize of output 16 [2022-11-02 20:43:06,531 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 13 treesize of output 9 [2022-11-02 20:43:06,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:06,950 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:43:06,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 18 [2022-11-02 20:43:06,955 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 15 treesize of output 7 [2022-11-02 20:43:07,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:07,343 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-02 20:43:07,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 55 [2022-11-02 20:43:07,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:07,351 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 62 treesize of output 58 [2022-11-02 20:43:07,394 INFO L356 Elim1Store]: treesize reduction 90, result has 37.9 percent of original size [2022-11-02 20:43:07,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 40 treesize of output 69 [2022-11-02 20:43:07,619 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 81 treesize of output 57 [2022-11-02 20:43:07,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:07,916 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:43:07,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 29 [2022-11-02 20:43:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 23 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:08,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:08,318 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_node_create_~temp~0#1.base_28| Int) (v_ArrVal_1443 (Array Int Int)) (v_ArrVal_1442 (Array Int Int))) (or (not (= (select |c_#valid| |v_node_create_~temp~0#1.base_28|) 0)) (not (< |v_node_create_~temp~0#1.base_28| |c_#StackHeapBarrier|)) (= (select (store |c_#valid| |v_node_create_~temp~0#1.base_28| 1) (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_28| v_ArrVal_1442))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (+ (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_28| v_ArrVal_1443) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 4))) 1))) is different from false [2022-11-02 20:43:08,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28384300] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:08,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:08,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 45 [2022-11-02 20:43:08,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219348256] [2022-11-02 20:43:08,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:08,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-02 20:43:08,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:08,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-02 20:43:08,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2175, Unknown=4, NotChecked=94, Total=2450 [2022-11-02 20:43:08,323 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 46 states, 43 states have (on average 1.930232558139535) internal successors, (83), 40 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:43:09,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:09,653 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-11-02 20:43:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:43:09,654 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.930232558139535) internal successors, (83), 40 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 49 [2022-11-02 20:43:09,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:09,655 INFO L225 Difference]: With dead ends: 82 [2022-11-02 20:43:09,655 INFO L226 Difference]: Without dead ends: 82 [2022-11-02 20:43:09,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=303, Invalid=3234, Unknown=7, NotChecked=116, Total=3660 [2022-11-02 20:43:09,658 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 40 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:09,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 863 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 80 Unchecked, 0.5s Time] [2022-11-02 20:43:09,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-02 20:43:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-11-02 20:43:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.28125) internal successors, (82), 75 states have internal predecessors, (82), 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) [2022-11-02 20:43:09,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-11-02 20:43:09,662 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 49 [2022-11-02 20:43:09,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:09,662 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-11-02 20:43:09,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.930232558139535) internal successors, (83), 40 states have internal predecessors, (83), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:43:09,663 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-11-02 20:43:09,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:43:09,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:09,664 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-02 20:43:09,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:09,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:43:09,875 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:43:09,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:09,875 INFO L85 PathProgramCache]: Analyzing trace with hash 218878957, now seen corresponding path program 1 times [2022-11-02 20:43:09,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:09,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695596567] [2022-11-02 20:43:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:09,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:09,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:10,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:43:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:10,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:43:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:10,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:43:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:43:10,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:10,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695596567] [2022-11-02 20:43:10,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695596567] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:10,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179618474] [2022-11-02 20:43:10,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:10,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:10,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:10,442 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:10,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:43:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:10,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-02 20:43:10,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:10,893 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:43:11,129 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:43:11,141 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:43:11,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:11,150 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 [2022-11-02 20:43:11,214 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 28 treesize of output 16 [2022-11-02 20:43:11,219 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 15 treesize of output 7 [2022-11-02 20:43:11,320 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 15 treesize of output 7 [2022-11-02 20:43:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-02 20:43:11,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:43:11,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179618474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:43:11,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:43:11,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [16] total 27 [2022-11-02 20:43:11,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622945051] [2022-11-02 20:43:11,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:43:11,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:43:11,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:11,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:43:11,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=638, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:43:11,355 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:43:12,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:12,018 INFO L93 Difference]: Finished difference Result 106 states and 117 transitions. [2022-11-02 20:43:12,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:43:12,021 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-11-02 20:43:12,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:12,022 INFO L225 Difference]: With dead ends: 106 [2022-11-02 20:43:12,022 INFO L226 Difference]: Without dead ends: 106 [2022-11-02 20:43:12,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-11-02 20:43:12,023 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 130 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:12,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 530 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:43:12,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-02 20:43:12,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 81. [2022-11-02 20:43:12,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 76 states have internal predecessors, (83), 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) [2022-11-02 20:43:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2022-11-02 20:43:12,032 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 52 [2022-11-02 20:43:12,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:12,032 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2022-11-02 20:43:12,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:43:12,033 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2022-11-02 20:43:12,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:43:12,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:12,035 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-02 20:43:12,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:12,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:12,235 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:43:12,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:12,236 INFO L85 PathProgramCache]: Analyzing trace with hash -521057353, now seen corresponding path program 1 times [2022-11-02 20:43:12,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:12,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024943668] [2022-11-02 20:43:12,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:12,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:12,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:43:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:12,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:43:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:12,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:43:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:43:12,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:12,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024943668] [2022-11-02 20:43:12,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024943668] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:12,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781273335] [2022-11-02 20:43:12,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:12,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:12,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:12,987 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:12,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:43:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:13,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-02 20:43:13,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:13,233 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 [2022-11-02 20:43:13,277 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 5 treesize of output 3 [2022-11-02 20:43:13,428 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:43:13,429 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 12 treesize of output 18 [2022-11-02 20:43:13,557 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 5 treesize of output 3 [2022-11-02 20:43:13,631 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:43:13,631 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 [2022-11-02 20:43:13,982 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 18 treesize of output 10 [2022-11-02 20:43:14,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:14,262 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 24 treesize of output 24 [2022-11-02 20:43:14,288 INFO L356 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-02 20:43:14,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2022-11-02 20:43:14,531 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-02 20:43:14,531 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 [2022-11-02 20:43:14,593 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 [2022-11-02 20:43:14,602 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:43:14,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:14,696 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1788 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem9#1.base| v_ArrVal_1788) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2022-11-02 20:43:14,703 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1788 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) v_ArrVal_1788) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2022-11-02 20:43:14,777 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1788 (Array Int Int)) (v_ArrVal_1794 (Array Int Int)) (v_ArrVal_1795 Int) (|v_node_create_~temp~0#1.base_31| Int)) (or (not (= 0 (select |c_#valid| |v_node_create_~temp~0#1.base_31|))) (= (select (store |c_#valid| |v_node_create_~temp~0#1.base_31| v_ArrVal_1795) (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_31| v_ArrVal_1794))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) v_ArrVal_1788)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1) (not (< |v_node_create_~temp~0#1.base_31| |c_#StackHeapBarrier|)))) is different from false [2022-11-02 20:43:14,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781273335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:14,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:14,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 42 [2022-11-02 20:43:14,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065330766] [2022-11-02 20:43:14,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:14,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-02 20:43:14,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:14,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-02 20:43:14,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1725, Unknown=16, NotChecked=258, Total=2162 [2022-11-02 20:43:14,781 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 43 states, 40 states have (on average 2.15) internal successors, (86), 37 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:43:15,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:15,685 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2022-11-02 20:43:15,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:43:15,686 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 2.15) internal successors, (86), 37 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 52 [2022-11-02 20:43:15,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:15,687 INFO L225 Difference]: With dead ends: 144 [2022-11-02 20:43:15,687 INFO L226 Difference]: Without dead ends: 144 [2022-11-02 20:43:15,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=307, Invalid=2881, Unknown=16, NotChecked=336, Total=3540 [2022-11-02 20:43:15,689 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 204 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:15,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 684 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 590 Invalid, 0 Unknown, 84 Unchecked, 0.4s Time] [2022-11-02 20:43:15,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-02 20:43:15,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 87. [2022-11-02 20:43:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 82 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) [2022-11-02 20:43:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2022-11-02 20:43:15,693 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 52 [2022-11-02 20:43:15,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:15,693 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2022-11-02 20:43:15,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 2.15) internal successors, (86), 37 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:43:15,694 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2022-11-02 20:43:15,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:43:15,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:15,695 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-02 20:43:15,728 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:15,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:43:15,913 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:43:15,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:15,914 INFO L85 PathProgramCache]: Analyzing trace with hash -521057352, now seen corresponding path program 1 times [2022-11-02 20:43:15,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:15,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983382701] [2022-11-02 20:43:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:15,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:16,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:43:16,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:16,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:43:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:16,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:43:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:43:17,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:17,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983382701] [2022-11-02 20:43:17,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983382701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:17,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549663317] [2022-11-02 20:43:17,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:17,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:17,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:17,211 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:17,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:43:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:17,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-02 20:43:17,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:17,886 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 16 treesize of output 8 [2022-11-02 20:43:17,890 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 7 treesize of output 3 [2022-11-02 20:43:18,018 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_1965 (Array Int Int)) (|node_create_~temp~0#1.base| Int) (v_ArrVal_1964 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_1965)) (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_1964)))) is different from true [2022-11-02 20:43:18,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:18,056 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 24 treesize of output 24 [2022-11-02 20:43:18,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:18,066 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 14 treesize of output 16 [2022-11-02 20:43:18,492 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-02 20:43:18,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 62 [2022-11-02 20:43:18,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:18,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2022-11-02 20:43:18,514 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 7 treesize of output 3 [2022-11-02 20:43:18,616 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 34 treesize of output 18 [2022-11-02 20:43:18,624 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 15 treesize of output 7 [2022-11-02 20:43:18,721 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 3 not checked. [2022-11-02 20:43:18,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:18,876 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_sll_append_~last~0#1.offset| 4))) (and (forall ((v_ArrVal_1966 Int)) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store .cse0 .cse1 v_ArrVal_1966)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))) (forall ((v_ArrVal_1966 Int) (v_ArrVal_1968 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store .cse0 .cse1 v_ArrVal_1966)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_1968) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))))) is different from false [2022-11-02 20:43:19,008 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:43:19,008 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 57 treesize of output 61 [2022-11-02 20:43:19,412 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (let ((.cse1 (select |c_#memory_$Pointer$.offset| .cse0)) (.cse3 (select |c_#memory_$Pointer$.base| .cse0)) (.cse4 (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (and (forall ((v_prenex_6 Int) (|v_ULTIMATE.start_sll_append_~last~0#1.offset_17| Int)) (let ((.cse2 (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_17| 4))) (or (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| .cse0 (store .cse1 .cse2 v_prenex_6)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4)) (not (= (select .cse3 .cse2) 0)) (< |v_ULTIMATE.start_sll_append_~last~0#1.offset_17| .cse4)))) (or (forall ((v_ArrVal_1968 (Array Int Int))) (= .cse0 (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_1968) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (forall ((|v_ULTIMATE.start_sll_append_~last~0#1.offset_17| Int)) (or (not (= (select .cse3 (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_17| 4)) 0)) (< |v_ULTIMATE.start_sll_append_~last~0#1.offset_17| .cse4)))) (forall ((|v_ULTIMATE.start_sll_append_~last~0#1.offset_17| Int) (v_ArrVal_1966 Int)) (let ((.cse5 (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_17| 4))) (or (< (select (select (store |c_#memory_$Pointer$.offset| .cse0 (store .cse1 .cse5 v_ArrVal_1966)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_17| 1)) (not (= (select .cse3 .cse5) 0)) (< |v_ULTIMATE.start_sll_append_~last~0#1.offset_17| .cse4))))))) is different from false [2022-11-02 20:43:21,664 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_node_create_~temp~0#1.base_34| Int)) (or (not (< |v_node_create_~temp~0#1.base_34| |c_#StackHeapBarrier|)) (forall ((v_ArrVal_1976 (Array Int Int)) (v_ArrVal_1975 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_34| v_ArrVal_1975))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (or (forall ((|v_ULTIMATE.start_sll_append_~last~0#1.offset_17| Int)) (or (not (= (select (select .cse0 .cse1) (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_17| 4)) 0)) (< |v_ULTIMATE.start_sll_append_~last~0#1.offset_17| (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_34| v_ArrVal_1976) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)))) (forall ((v_ArrVal_1968 (Array Int Int))) (= .cse1 (select (select (store .cse0 .cse1 v_ArrVal_1968) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))))) (forall ((|v_node_create_~temp~0#1.base_34| Int)) (or (not (< |v_node_create_~temp~0#1.base_34| |c_#StackHeapBarrier|)) (forall ((v_prenex_6 Int) (v_ArrVal_1976 (Array Int Int)) (v_ArrVal_1975 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~last~0#1.offset_17| Int)) (let ((.cse2 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_34| v_ArrVal_1975))) (let ((.cse5 (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_34| v_ArrVal_1976)) (.cse3 (select (select .cse2 |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (.cse4 (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_17| 4))) (or (not (= (select (select .cse2 .cse3) .cse4) 0)) (< |v_ULTIMATE.start_sll_append_~last~0#1.offset_17| (select (select .cse5 |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (<= 0 (+ (select (select (store .cse5 .cse3 (store (select .cse5 .cse3) .cse4 v_prenex_6)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4)))))))) (forall ((|v_node_create_~temp~0#1.base_34| Int)) (or (forall ((v_ArrVal_1976 (Array Int Int)) (v_ArrVal_1975 (Array Int Int)) (|v_ULTIMATE.start_sll_append_~last~0#1.offset_17| Int) (v_ArrVal_1966 Int)) (let ((.cse6 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_34| v_ArrVal_1975))) (let ((.cse9 (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_34| v_ArrVal_1976)) (.cse7 (select (select .cse6 |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (.cse8 (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_17| 4))) (or (not (= (select (select .cse6 .cse7) .cse8) 0)) (< |v_ULTIMATE.start_sll_append_~last~0#1.offset_17| (select (select .cse9 |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (< (select (select (store .cse9 .cse7 (store (select .cse9 .cse7) .cse8 v_ArrVal_1966)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (+ |v_ULTIMATE.start_sll_append_~last~0#1.offset_17| 1)))))) (not (< |v_node_create_~temp~0#1.base_34| |c_#StackHeapBarrier|))))) is different from false [2022-11-02 20:43:21,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549663317] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:21,668 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:21,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 37 [2022-11-02 20:43:21,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500330751] [2022-11-02 20:43:21,669 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:21,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-02 20:43:21,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:21,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-02 20:43:21,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1669, Unknown=4, NotChecked=340, Total=2162 [2022-11-02 20:43:21,670 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 38 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 20:43:24,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:24,017 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2022-11-02 20:43:24,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:43:24,017 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2022-11-02 20:43:24,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:24,018 INFO L225 Difference]: With dead ends: 117 [2022-11-02 20:43:24,018 INFO L226 Difference]: Without dead ends: 117 [2022-11-02 20:43:24,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=439, Invalid=3113, Unknown=4, NotChecked=476, Total=4032 [2022-11-02 20:43:24,020 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 488 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:24,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 788 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 770 Invalid, 0 Unknown, 111 Unchecked, 0.8s Time] [2022-11-02 20:43:24,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-02 20:43:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 89. [2022-11-02 20:43:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 84 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) [2022-11-02 20:43:24,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2022-11-02 20:43:24,023 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 52 [2022-11-02 20:43:24,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:24,023 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2022-11-02 20:43:24,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 34 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-11-02 20:43:24,024 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2022-11-02 20:43:24,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-02 20:43:24,024 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:24,024 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-02 20:43:24,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:24,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:43:24,239 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:43:24,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:24,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1804686442, now seen corresponding path program 1 times [2022-11-02 20:43:24,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:24,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364178416] [2022-11-02 20:43:24,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:24,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:24,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:43:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:24,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:43:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:24,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:43:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:43:24,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:24,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364178416] [2022-11-02 20:43:24,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364178416] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:24,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849373476] [2022-11-02 20:43:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:24,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:24,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:24,803 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:24,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:43:25,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:25,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-02 20:43:25,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:25,390 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 17 treesize of output 9 [2022-11-02 20:43:25,468 WARN L855 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int) (v_ArrVal_2144 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2144)))) is different from true [2022-11-02 20:43:25,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:25,490 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 24 treesize of output 24 [2022-11-02 20:43:25,536 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 [2022-11-02 20:43:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 3 not checked. [2022-11-02 20:43:25,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:25,663 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2148 (Array Int Int)) (|v_node_create_~temp~0#1.base_37| Int)) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_37| v_ArrVal_2148) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (or (not (< |v_node_create_~temp~0#1.base_37| |c_#StackHeapBarrier|)) (<= 1 .cse0) (<= (+ .cse0 1) 0)))) is different from false [2022-11-02 20:43:25,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849373476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:25,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:25,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 26 [2022-11-02 20:43:25,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878974580] [2022-11-02 20:43:25,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:25,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-02 20:43:25,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:25,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-02 20:43:25,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=571, Unknown=2, NotChecked=98, Total=756 [2022-11-02 20:43:25,666 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:43:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:26,258 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2022-11-02 20:43:26,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 20:43:26,260 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2022-11-02 20:43:26,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:26,261 INFO L225 Difference]: With dead ends: 80 [2022-11-02 20:43:26,261 INFO L226 Difference]: Without dead ends: 80 [2022-11-02 20:43:26,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=172, Invalid=956, Unknown=2, NotChecked=130, Total=1260 [2022-11-02 20:43:26,262 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 184 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:26,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 341 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 305 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2022-11-02 20:43:26,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-02 20:43:26,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-02 20:43:26,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.265625) internal successors, (81), 75 states have internal predecessors, (81), 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) [2022-11-02 20:43:26,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2022-11-02 20:43:26,267 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 53 [2022-11-02 20:43:26,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:26,268 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2022-11-02 20:43:26,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 22 states have internal predecessors, (67), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:43:26,268 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2022-11-02 20:43:26,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-02 20:43:26,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:26,269 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:43:26,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:26,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:26,479 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:43:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:26,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1947817869, now seen corresponding path program 2 times [2022-11-02 20:43:26,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:26,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931968516] [2022-11-02 20:43:26,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:26,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:26,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:28,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:43:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:28,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:43:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:29,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:43:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:29,637 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 10 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:43:29,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:29,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931968516] [2022-11-02 20:43:29,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931968516] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:29,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252932457] [2022-11-02 20:43:29,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:43:29,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:29,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:29,639 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:29,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:43:29,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:43:29,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:43:29,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 129 conjunts are in the unsatisfiable core [2022-11-02 20:43:29,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:29,968 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 [2022-11-02 20:43:30,194 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:43:30,204 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:43:30,825 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:43:30,826 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-02 20:43:30,831 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 7 treesize of output 3 [2022-11-02 20:43:30,858 INFO L356 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-02 20:43:30,859 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 19 treesize of output 16 [2022-11-02 20:43:30,870 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 16 treesize of output 18 [2022-11-02 20:43:31,071 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 23 treesize of output 22 [2022-11-02 20:43:31,082 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 29 treesize of output 28 [2022-11-02 20:43:31,665 INFO L356 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-11-02 20:43:31,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 84 [2022-11-02 20:43:31,685 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-02 20:43:31,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 29 [2022-11-02 20:43:31,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:43:31,842 WARN L855 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_2319 (Array Int Int)) (|node_create_~temp~0#1.base| Int) (v_ArrVal_2320 (Array Int Int))) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| v_ArrVal_2319)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2320)))) is different from true [2022-11-02 20:43:31,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:31,914 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-11-02 20:43:31,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 165 treesize of output 149 [2022-11-02 20:43:31,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:31,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:31,939 INFO L356 Elim1Store]: treesize reduction 47, result has 9.6 percent of original size [2022-11-02 20:43:31,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 156 treesize of output 135 [2022-11-02 20:43:31,981 INFO L356 Elim1Store]: treesize reduction 8, result has 77.1 percent of original size [2022-11-02 20:43:31,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2022-11-02 20:43:32,748 INFO L356 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2022-11-02 20:43:32,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 205 treesize of output 96 [2022-11-02 20:43:32,767 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-02 20:43:32,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 32 [2022-11-02 20:43:32,840 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2022-11-02 20:43:32,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:33,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252932457] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:33,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:33,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 28] total 52 [2022-11-02 20:43:33,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149657993] [2022-11-02 20:43:33,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:33,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-02 20:43:33,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:33,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-02 20:43:33,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3026, Unknown=3, NotChecked=110, Total=3306 [2022-11-02 20:43:33,599 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 52 states, 50 states have (on average 1.68) internal successors, (84), 46 states have internal predecessors, (84), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:43:36,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:36,491 INFO L93 Difference]: Finished difference Result 101 states and 113 transitions. [2022-11-02 20:43:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:43:36,492 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.68) internal successors, (84), 46 states have internal predecessors, (84), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-11-02 20:43:36,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:36,493 INFO L225 Difference]: With dead ends: 101 [2022-11-02 20:43:36,493 INFO L226 Difference]: Without dead ends: 101 [2022-11-02 20:43:36,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=298, Invalid=4959, Unknown=3, NotChecked=142, Total=5402 [2022-11-02 20:43:36,495 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 33 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 220 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:36,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1074 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 887 Invalid, 0 Unknown, 220 Unchecked, 0.9s Time] [2022-11-02 20:43:36,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-02 20:43:36,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-11-02 20:43:36,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 93 states have internal predecessors, (101), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:43:36,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2022-11-02 20:43:36,499 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 53 [2022-11-02 20:43:36,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:36,500 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2022-11-02 20:43:36,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.68) internal successors, (84), 46 states have internal predecessors, (84), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:43:36,500 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2022-11-02 20:43:36,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:43:36,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:36,501 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-02 20:43:36,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:36,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:36,723 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:43:36,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:36,723 INFO L85 PathProgramCache]: Analyzing trace with hash 729745886, now seen corresponding path program 1 times [2022-11-02 20:43:36,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:36,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728483734] [2022-11-02 20:43:36,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:36,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:36,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:37,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:43:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:37,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:43:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:38,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:43:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:43:38,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:38,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728483734] [2022-11-02 20:43:38,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728483734] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:38,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165840770] [2022-11-02 20:43:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:38,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:38,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:38,742 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:38,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:43:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:38,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-02 20:43:38,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:39,000 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 [2022-11-02 20:43:39,048 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 5 treesize of output 3 [2022-11-02 20:43:39,220 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:43:39,220 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 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 20:43:39,521 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:43:39,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:43:39,652 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-02 20:43:39,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:43:39,818 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:43:40,254 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:43:40,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 21 [2022-11-02 20:43:40,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2022-11-02 20:43:40,267 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 7 treesize of output 3 [2022-11-02 20:43:40,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:40,659 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 14 treesize of output 16 [2022-11-02 20:43:40,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:40,680 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-02 20:43:40,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 48 [2022-11-02 20:43:40,693 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-02 20:43:40,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-02 20:43:40,840 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 15 treesize of output 7 [2022-11-02 20:43:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:43:41,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:41,408 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2511 (Array Int Int)) (v_ArrVal_2510 (Array Int Int)) (|v_node_create_~temp~0#1.base_43| Int)) (or (not (= (select |c_#valid| |v_node_create_~temp~0#1.base_43|) 0)) (not (= (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |v_node_create_~temp~0#1.base_43| v_ArrVal_2510))) (select .cse0 (select (select .cse0 |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|))) (+ (select (select (store |c_#memory_$Pointer$.offset| |v_node_create_~temp~0#1.base_43| v_ArrVal_2511) |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 4)) 0)) (not (< |v_node_create_~temp~0#1.base_43| |c_#StackHeapBarrier|)))) is different from false [2022-11-02 20:43:41,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165840770] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:41,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:41,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 26] total 47 [2022-11-02 20:43:41,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144998139] [2022-11-02 20:43:41,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:41,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-02 20:43:41,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:41,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-02 20:43:41,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2422, Unknown=3, NotChecked=98, Total=2652 [2022-11-02 20:43:41,413 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 47 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 41 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:43:44,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:44,496 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2022-11-02 20:43:44,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:43:44,497 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 41 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 56 [2022-11-02 20:43:44,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:44,498 INFO L225 Difference]: With dead ends: 92 [2022-11-02 20:43:44,498 INFO L226 Difference]: Without dead ends: 92 [2022-11-02 20:43:44,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=336, Invalid=4495, Unknown=3, NotChecked=136, Total=4970 [2022-11-02 20:43:44,501 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 69 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 1226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:44,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1398 Invalid, 1226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1098 Invalid, 0 Unknown, 107 Unchecked, 0.8s Time] [2022-11-02 20:43:44,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-02 20:43:44,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-11-02 20:43:44,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.2297297297297298) internal successors, (91), 85 states have internal predecessors, (91), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:43:44,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2022-11-02 20:43:44,505 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 56 [2022-11-02 20:43:44,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:44,506 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2022-11-02 20:43:44,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 41 states have internal predecessors, (97), 5 states have call successors, (5), 3 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:43:44,506 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2022-11-02 20:43:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:43:44,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:44,507 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-02 20:43:44,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:44,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-02 20:43:44,719 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:43:44,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:44,719 INFO L85 PathProgramCache]: Analyzing trace with hash 294390785, now seen corresponding path program 1 times [2022-11-02 20:43:44,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:44,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010521081] [2022-11-02 20:43:44,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:44,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:45,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:43:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:45,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:43:45,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:45,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:43:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:45,904 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:43:45,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:45,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010521081] [2022-11-02 20:43:45,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010521081] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:45,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551300778] [2022-11-02 20:43:45,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:45,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:45,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:45,907 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:45,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:43:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:46,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 74 conjunts are in the unsatisfiable core [2022-11-02 20:43:46,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:46,426 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:43:46,692 INFO L356 Elim1Store]: treesize reduction 3, result has 83.3 percent of original size [2022-11-02 20:43:46,693 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2022-11-02 20:43:46,698 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 15 treesize of output 11 [2022-11-02 20:43:46,701 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 5 treesize of output 3 [2022-11-02 20:43:47,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:47,004 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 26 treesize of output 28 [2022-11-02 20:43:47,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:47,020 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-02 20:43:47,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 41 [2022-11-02 20:43:47,049 INFO L356 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2022-11-02 20:43:47,049 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 21 treesize of output 29 [2022-11-02 20:43:47,160 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 27 treesize of output 19 [2022-11-02 20:43:47,482 INFO L356 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-02 20:43:47,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 48 [2022-11-02 20:43:47,489 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 21 treesize of output 13 [2022-11-02 20:43:47,591 INFO L356 Elim1Store]: treesize reduction 3, result has 78.6 percent of original size [2022-11-02 20:43:47,591 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2022-11-02 20:43:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:43:47,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:47,617 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2685 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_2685) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2022-11-02 20:43:47,729 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2685 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (+ |c_ULTIMATE.start_sll_append_~last~0#1.offset| 4)) v_ArrVal_2685) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2022-11-02 20:43:47,740 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2685 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem9#1.base|) (+ |c_ULTIMATE.start_sll_append_#t~mem9#1.offset| 4)) v_ArrVal_2685) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2022-11-02 20:43:47,747 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2685 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|)) (+ (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~head#1.base|) |c_ULTIMATE.start_sll_append_~head#1.offset|) 4)) v_ArrVal_2685) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2022-11-02 20:43:47,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551300778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:47,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:47,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23] total 46 [2022-11-02 20:43:47,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123059693] [2022-11-02 20:43:47,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:47,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-02 20:43:47,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:47,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-02 20:43:47,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2164, Unknown=32, NotChecked=388, Total=2756 [2022-11-02 20:43:47,915 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 47 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:43:49,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:43:49,542 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2022-11-02 20:43:49,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-02 20:43:49,543 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 56 [2022-11-02 20:43:49,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:43:49,544 INFO L225 Difference]: With dead ends: 118 [2022-11-02 20:43:49,544 INFO L226 Difference]: Without dead ends: 118 [2022-11-02 20:43:49,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=388, Invalid=4282, Unknown=38, NotChecked=548, Total=5256 [2022-11-02 20:43:49,547 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 93 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:43:49,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 730 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 779 Invalid, 0 Unknown, 28 Unchecked, 0.5s Time] [2022-11-02 20:43:49,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-02 20:43:49,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2022-11-02 20:43:49,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 92 states have internal predecessors, (101), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:43:49,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2022-11-02 20:43:49,558 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 56 [2022-11-02 20:43:49,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:43:49,558 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2022-11-02 20:43:49,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 2.0454545454545454) internal successors, (90), 43 states have internal predecessors, (90), 5 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:43:49,559 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2022-11-02 20:43:49,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:43:49,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:43:49,559 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-02 20:43:49,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:43:49,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:49,760 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:43:49,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:43:49,760 INFO L85 PathProgramCache]: Analyzing trace with hash 294390786, now seen corresponding path program 1 times [2022-11-02 20:43:49,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:43:49,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977356780] [2022-11-02 20:43:49,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:49,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:43:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:50,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:43:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:50,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:43:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:50,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:43:50,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:43:51,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:43:51,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977356780] [2022-11-02 20:43:51,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977356780] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:51,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764594120] [2022-11-02 20:43:51,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:43:51,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:43:51,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:43:51,107 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:43:51,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:43:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:43:51,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-02 20:43:51,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:43:51,422 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 [2022-11-02 20:43:51,478 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 5 treesize of output 3 [2022-11-02 20:43:51,572 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:43:51,573 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 [2022-11-02 20:43:51,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-02 20:43:51,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:43:52,288 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:43:52,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 17 [2022-11-02 20:43:52,293 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 7 treesize of output 3 [2022-11-02 20:43:52,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:52,598 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-02 20:43:52,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 40 [2022-11-02 20:43:52,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:43:52,610 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 14 treesize of output 16 [2022-11-02 20:43:52,621 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-02 20:43:52,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-02 20:43:53,380 INFO L356 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2022-11-02 20:43:53,380 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 105 [2022-11-02 20:43:53,400 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-02 20:43:53,401 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 75 [2022-11-02 20:43:53,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:43:53,432 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-02 20:43:53,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 23 [2022-11-02 20:43:53,583 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:43:53,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 31 [2022-11-02 20:43:53,589 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 26 treesize of output 14 [2022-11-02 20:43:53,707 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:43:53,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:43:55,419 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:43:55,422 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 121 treesize of output 125 [2022-11-02 20:43:55,489 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (+ |c_ULTIMATE.start_sll_append_~last~0#1.offset| 4)))) (let ((.cse1 (select |c_#memory_$Pointer$.base| .cse2)) (.cse4 (select |c_#memory_$Pointer$.offset| .cse2))) (let ((.cse0 (forall ((v_ArrVal_2872 Int) (v_subst_1 Int)) (let ((.cse5 (+ 4 v_subst_1))) (or (not (= (select .cse1 .cse5) 0)) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| .cse2 (store .cse4 .cse5 v_ArrVal_2872)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))))))) (and .cse0 (or (and .cse0 (forall ((v_subst_2 Int)) (not (= (select .cse1 (+ 4 v_subst_2)) 0)))) (forall ((v_ArrVal_2871 (Array Int Int))) (= |c_ULTIMATE.start_sll_append_~last~0#1.base| (select (select (store |c_#memory_$Pointer$.base| .cse2 v_ArrVal_2871) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_prenex_22 Int) (v_subst_2 Int)) (let ((.cse3 (+ 4 v_subst_2))) (or (not (= (select .cse1 .cse3) 0)) (< (select (select (store |c_#memory_$Pointer$.offset| .cse2 (store .cse4 .cse3 v_prenex_22)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (+ |c_ULTIMATE.start_sll_append_~last~0#1.offset| 1))))))))) is different from false [2022-11-02 20:43:55,533 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_#t~mem9#1.base|) (+ |c_ULTIMATE.start_sll_append_#t~mem9#1.offset| 4)))) (let ((.cse2 (select |c_#memory_$Pointer$.base| .cse1)) (.cse3 (select |c_#memory_$Pointer$.offset| .cse1))) (let ((.cse0 (forall ((v_ArrVal_2872 Int) (v_subst_1 Int)) (let ((.cse5 (+ 4 v_subst_1))) (or (not (= (select .cse2 .cse5) 0)) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| .cse1 (store .cse3 .cse5 v_ArrVal_2872)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 4))))))) (and .cse0 (or (forall ((v_ArrVal_2871 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| .cse1 v_ArrVal_2871) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) |c_ULTIMATE.start_sll_append_#t~mem9#1.base|)) (and .cse0 (forall ((v_subst_2 Int)) (not (= (select .cse2 (+ 4 v_subst_2)) 0))))) (forall ((v_prenex_22 Int) (v_subst_2 Int)) (let ((.cse4 (+ 4 v_subst_2))) (or (< (select (select (store |c_#memory_$Pointer$.offset| .cse1 (store .cse3 .cse4 v_prenex_22)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) (+ |c_ULTIMATE.start_sll_append_#t~mem9#1.offset| 1)) (not (= (select .cse2 .cse4) 0))))))))) is different from false [2022-11-02 20:43:57,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764594120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:43:57,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:43:57,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31] total 57 [2022-11-02 20:43:57,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100276989] [2022-11-02 20:43:57,076 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:43:57,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-02 20:43:57,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:43:57,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-02 20:43:57,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=4275, Unknown=46, NotChecked=266, Total=4830 [2022-11-02 20:43:57,078 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand has 58 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 51 states have internal predecessors, (98), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:44:00,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:00,541 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2022-11-02 20:44:00,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 20:44:00,543 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 51 states have internal predecessors, (98), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 56 [2022-11-02 20:44:00,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:00,544 INFO L225 Difference]: With dead ends: 144 [2022-11-02 20:44:00,544 INFO L226 Difference]: Without dead ends: 144 [2022-11-02 20:44:00,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3100 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=698, Invalid=10173, Unknown=57, NotChecked=414, Total=11342 [2022-11-02 20:44:00,546 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 547 mSDsluCounter, 831 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 1251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:00,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 864 Invalid, 1251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1048 Invalid, 0 Unknown, 118 Unchecked, 0.7s Time] [2022-11-02 20:44:00,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-02 20:44:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 103. [2022-11-02 20:44:00,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 85 states have (on average 1.223529411764706) internal successors, (104), 96 states have internal predecessors, (104), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:44:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2022-11-02 20:44:00,552 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 56 [2022-11-02 20:44:00,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:00,552 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2022-11-02 20:44:00,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 51 states have internal predecessors, (98), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:44:00,553 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2022-11-02 20:44:00,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-02 20:44:00,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:00,554 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1] [2022-11-02 20:44:00,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:00,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:00,759 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:44:00,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:00,759 INFO L85 PathProgramCache]: Analyzing trace with hash 348951848, now seen corresponding path program 1 times [2022-11-02 20:44:00,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:00,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618162633] [2022-11-02 20:44:00,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:00,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:00,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:03,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:44:03,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:03,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:44:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:03,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:44:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:04,885 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:44:04,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:04,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618162633] [2022-11-02 20:44:04,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618162633] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:04,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909073518] [2022-11-02 20:44:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:04,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:04,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:04,887 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:04,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:44:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:05,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 130 conjunts are in the unsatisfiable core [2022-11-02 20:44:05,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:05,181 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 [2022-11-02 20:44:05,267 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 5 treesize of output 3 [2022-11-02 20:44:05,523 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:44:05,524 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 12 treesize of output 18 [2022-11-02 20:44:05,875 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:44:05,875 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 7 [2022-11-02 20:44:05,962 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 [2022-11-02 20:44:06,160 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-02 20:44:06,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:44:06,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:06,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-02 20:44:06,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:44:06,991 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:44:06,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 28 [2022-11-02 20:44:06,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-02 20:44:07,004 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 7 treesize of output 3 [2022-11-02 20:44:07,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:07,518 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-02 20:44:07,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 57 [2022-11-02 20:44:07,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:07,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-02 20:44:07,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:07,544 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 14 treesize of output 16 [2022-11-02 20:44:07,559 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-02 20:44:07,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-02 20:44:08,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:44:08,746 INFO L356 Elim1Store]: treesize reduction 134, result has 17.8 percent of original size [2022-11-02 20:44:08,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 169 treesize of output 85 [2022-11-02 20:44:08,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-02 20:44:08,778 INFO L356 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2022-11-02 20:44:08,779 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 1 case distinctions, treesize of input 37 treesize of output 28 [2022-11-02 20:44:08,913 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:44:08,914 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 26 [2022-11-02 20:44:08,920 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 [2022-11-02 20:44:09,123 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 [2022-11-02 20:44:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:44:09,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:09,468 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3064 (Array Int Int)) (v_ArrVal_3065 Int) (v_ArrVal_3066 Int)) (let ((.cse1 (+ |c_ULTIMATE.start_sll_append_~last~0#1.offset| 4))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse1 v_ArrVal_3065)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (not (<= 0 .cse0)) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_3064) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse1 v_ArrVal_3066)) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse0)))))) is different from false [2022-11-02 20:44:12,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909073518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:12,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:12,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 68 [2022-11-02 20:44:12,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41749767] [2022-11-02 20:44:12,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:12,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-02 20:44:12,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:12,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-02 20:44:12,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=5737, Unknown=8, NotChecked=152, Total=6162 [2022-11-02 20:44:12,023 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 68 states, 66 states have (on average 1.606060606060606) internal successors, (106), 61 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:44:18,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:18,615 INFO L93 Difference]: Finished difference Result 133 states and 147 transitions. [2022-11-02 20:44:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-02 20:44:18,616 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 66 states have (on average 1.606060606060606) internal successors, (106), 61 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 60 [2022-11-02 20:44:18,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:18,616 INFO L225 Difference]: With dead ends: 133 [2022-11-02 20:44:18,616 INFO L226 Difference]: Without dead ends: 133 [2022-11-02 20:44:18,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2175 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=715, Invalid=10623, Unknown=8, NotChecked=210, Total=11556 [2022-11-02 20:44:18,618 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 228 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 2041 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 2293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:18,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 1325 Invalid, 2293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2041 Invalid, 0 Unknown, 191 Unchecked, 1.7s Time] [2022-11-02 20:44:18,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-02 20:44:18,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 106. [2022-11-02 20:44:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 88 states have (on average 1.2159090909090908) internal successors, (107), 99 states have internal predecessors, (107), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:44:18,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 117 transitions. [2022-11-02 20:44:18,622 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 117 transitions. Word has length 60 [2022-11-02 20:44:18,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:18,623 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 117 transitions. [2022-11-02 20:44:18,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 66 states have (on average 1.606060606060606) internal successors, (106), 61 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:44:18,623 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 117 transitions. [2022-11-02 20:44:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-02 20:44:18,624 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:18,624 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-02 20:44:18,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:18,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:44:18,831 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:44:18,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:18,831 INFO L85 PathProgramCache]: Analyzing trace with hash -2067394117, now seen corresponding path program 1 times [2022-11-02 20:44:18,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:18,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909249484] [2022-11-02 20:44:18,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:18,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:18,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:20,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:44:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:20,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:44:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:20,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:44:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:44:21,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:21,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909249484] [2022-11-02 20:44:21,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909249484] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:21,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929784988] [2022-11-02 20:44:21,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:21,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:21,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:21,550 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:21,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:44:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:21,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-02 20:44:21,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:22,374 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:44:22,375 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 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 [2022-11-02 20:44:22,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:44:22,977 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:44:22,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 29 [2022-11-02 20:44:22,981 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 7 treesize of output 3 [2022-11-02 20:44:22,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:44:23,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:23,374 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-02 20:44:23,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 62 [2022-11-02 20:44:23,416 INFO L356 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2022-11-02 20:44:23,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 57 [2022-11-02 20:44:23,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:23,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2022-11-02 20:44:24,208 INFO L356 Elim1Store]: treesize reduction 70, result has 33.3 percent of original size [2022-11-02 20:44:24,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 110 treesize of output 85 [2022-11-02 20:44:24,240 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-02 20:44:24,240 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:44:24,309 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 15 treesize of output 7 [2022-11-02 20:44:24,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:44:24,661 INFO L356 Elim1Store]: treesize reduction 27, result has 10.0 percent of original size [2022-11-02 20:44:24,661 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 45 [2022-11-02 20:44:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:44:25,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:28,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929784988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:28,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:28,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 30] total 65 [2022-11-02 20:44:28,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904437778] [2022-11-02 20:44:28,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:28,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-02 20:44:28,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:28,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-02 20:44:28,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=5286, Unknown=3, NotChecked=0, Total=5550 [2022-11-02 20:44:28,340 INFO L87 Difference]: Start difference. First operand 106 states and 117 transitions. Second operand has 66 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 60 states have internal predecessors, (109), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:44:31,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:31,670 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2022-11-02 20:44:31,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-02 20:44:31,670 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 60 states have internal predecessors, (109), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 61 [2022-11-02 20:44:31,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:31,671 INFO L225 Difference]: With dead ends: 111 [2022-11-02 20:44:31,671 INFO L226 Difference]: Without dead ends: 111 [2022-11-02 20:44:31,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2892 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=506, Invalid=8800, Unknown=6, NotChecked=0, Total=9312 [2022-11-02 20:44:31,673 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 52 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:31,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1039 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 653 Invalid, 0 Unknown, 186 Unchecked, 0.5s Time] [2022-11-02 20:44:31,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-02 20:44:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2022-11-02 20:44:31,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 91 states have (on average 1.2307692307692308) internal successors, (112), 102 states have internal predecessors, (112), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:44:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2022-11-02 20:44:31,678 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 61 [2022-11-02 20:44:31,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:31,688 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2022-11-02 20:44:31,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 63 states have (on average 1.7301587301587302) internal successors, (109), 60 states have internal predecessors, (109), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:44:31,689 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2022-11-02 20:44:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-02 20:44:31,690 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:31,690 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-11-02 20:44:31,721 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:31,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-02 20:44:31,911 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:44:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:31,911 INFO L85 PathProgramCache]: Analyzing trace with hash -2067394116, now seen corresponding path program 1 times [2022-11-02 20:44:31,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:31,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315182503] [2022-11-02 20:44:31,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:31,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:34,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:44:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:34,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:44:34,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:34,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:44:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:44:35,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:35,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315182503] [2022-11-02 20:44:35,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315182503] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:35,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515644485] [2022-11-02 20:44:35,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:35,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:35,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:35,636 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:35,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:44:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:35,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 149 conjunts are in the unsatisfiable core [2022-11-02 20:44:35,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:35,950 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 [2022-11-02 20:44:35,955 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 [2022-11-02 20:44:36,041 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 5 treesize of output 3 [2022-11-02 20:44:36,045 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 5 treesize of output 3 [2022-11-02 20:44:36,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:36,345 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 12 treesize of output 14 [2022-11-02 20:44:36,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:36,361 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 12 treesize of output 14 [2022-11-02 20:44:36,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:36,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:44:36,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:36,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:44:37,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:37,230 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-02 20:44:37,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-11-02 20:44:37,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:37,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 24 [2022-11-02 20:44:37,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:44:37,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:44:38,386 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:44:38,386 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 41 [2022-11-02 20:44:38,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:38,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-11-02 20:44:38,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:38,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:44:38,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:44:38,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:38,997 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-02 20:44:38,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 78 [2022-11-02 20:44:39,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:39,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:39,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-11-02 20:44:39,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:39,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:39,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:39,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 30 [2022-11-02 20:44:39,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:39,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:39,057 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-11-02 20:44:39,058 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2022-11-02 20:44:40,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:40,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:44:40,511 INFO L356 Elim1Store]: treesize reduction 145, result has 11.0 percent of original size [2022-11-02 20:44:40,511 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 85 [2022-11-02 20:44:40,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:40,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2022-11-02 20:44:41,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:44:41,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:44:41,161 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:44:41,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 48 [2022-11-02 20:44:41,173 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-02 20:44:41,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 16 [2022-11-02 20:44:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:44:41,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:56,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515644485] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:44:56,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:56,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35] total 71 [2022-11-02 20:44:56,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346316411] [2022-11-02 20:44:56,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:56,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-02 20:44:56,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:56,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-02 20:44:56,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=7204, Unknown=6, NotChecked=0, Total=7482 [2022-11-02 20:44:56,770 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 72 states, 69 states have (on average 1.5797101449275361) internal successors, (109), 64 states have internal predecessors, (109), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:45:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:45:04,700 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2022-11-02 20:45:04,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-02 20:45:04,700 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 69 states have (on average 1.5797101449275361) internal successors, (109), 64 states have internal predecessors, (109), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 61 [2022-11-02 20:45:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:45:04,701 INFO L225 Difference]: With dead ends: 113 [2022-11-02 20:45:04,701 INFO L226 Difference]: Without dead ends: 113 [2022-11-02 20:45:04,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2285 ImplicationChecksByTransitivity, 26.8s TimeCoverageRelationStatistics Valid=674, Invalid=12430, Unknown=6, NotChecked=0, Total=13110 [2022-11-02 20:45:04,703 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 112 mSDsluCounter, 1216 mSDsCounter, 0 mSdLazyCounter, 1414 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1255 SdHoareTripleChecker+Invalid, 1844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 388 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:45:04,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1255 Invalid, 1844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1414 Invalid, 0 Unknown, 388 Unchecked, 1.3s Time] [2022-11-02 20:45:04,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-02 20:45:04,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2022-11-02 20:45:04,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 93 states have (on average 1.2365591397849462) internal successors, (115), 104 states have internal predecessors, (115), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:45:04,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2022-11-02 20:45:04,708 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 61 [2022-11-02 20:45:04,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:45:04,708 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2022-11-02 20:45:04,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 69 states have (on average 1.5797101449275361) internal successors, (109), 64 states have internal predecessors, (109), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:45:04,709 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2022-11-02 20:45:04,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-02 20:45:04,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:04,710 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2022-11-02 20:45:04,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:04,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-02 20:45:04,923 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:45:04,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash 335290514, now seen corresponding path program 1 times [2022-11-02 20:45:04,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:04,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007718691] [2022-11-02 20:45:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:04,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:06,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:45:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:07,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:45:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:07,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:45:07,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:45:08,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:08,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007718691] [2022-11-02 20:45:08,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007718691] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:08,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247432566] [2022-11-02 20:45:08,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:08,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:08,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:08,089 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:08,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:45:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:08,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-02 20:45:08,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:08,388 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 [2022-11-02 20:45:08,445 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 5 treesize of output 3 [2022-11-02 20:45:08,656 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-02 20:45:08,657 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 1 case distinctions, treesize of input 12 treesize of output 18 [2022-11-02 20:45:08,977 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-02 20:45:08,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:45:09,153 INFO L356 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2022-11-02 20:45:09,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2022-11-02 20:45:09,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:45:09,812 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:45:09,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 25 [2022-11-02 20:45:09,822 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 7 treesize of output 3 [2022-11-02 20:45:10,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:10,249 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 14 treesize of output 16 [2022-11-02 20:45:10,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:10,271 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-02 20:45:10,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 54 [2022-11-02 20:45:10,283 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-02 20:45:10,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-02 20:45:10,723 INFO L356 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-02 20:45:10,723 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2022-11-02 20:45:10,765 INFO L356 Elim1Store]: treesize reduction 70, result has 33.3 percent of original size [2022-11-02 20:45:10,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 66 [2022-11-02 20:45:10,796 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 15 treesize of output 7 [2022-11-02 20:45:11,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:45:11,069 INFO L356 Elim1Store]: treesize reduction 27, result has 10.0 percent of original size [2022-11-02 20:45:11,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 26 [2022-11-02 20:45:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:45:11,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:18,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247432566] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:18,376 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:45:18,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 31] total 64 [2022-11-02 20:45:18,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325055424] [2022-11-02 20:45:18,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:18,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-02 20:45:18,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:18,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-02 20:45:18,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5031, Unknown=7, NotChecked=0, Total=5256 [2022-11-02 20:45:18,378 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 64 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 57 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:45:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:45:23,910 INFO L93 Difference]: Finished difference Result 122 states and 132 transitions. [2022-11-02 20:45:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-02 20:45:23,911 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 57 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 62 [2022-11-02 20:45:23,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:45:23,912 INFO L225 Difference]: With dead ends: 122 [2022-11-02 20:45:23,912 INFO L226 Difference]: Without dead ends: 122 [2022-11-02 20:45:23,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=604, Invalid=9691, Unknown=7, NotChecked=0, Total=10302 [2022-11-02 20:45:23,914 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 107 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 1688 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1487 SdHoareTripleChecker+Invalid, 1934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:45:23,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 1487 Invalid, 1934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1688 Invalid, 0 Unknown, 200 Unchecked, 1.2s Time] [2022-11-02 20:45:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-02 20:45:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2022-11-02 20:45:23,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 104 states have internal predecessors, (113), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:45:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2022-11-02 20:45:23,918 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 62 [2022-11-02 20:45:23,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:45:23,918 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2022-11-02 20:45:23,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 57 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:45:23,919 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2022-11-02 20:45:23,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-02 20:45:23,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:23,920 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 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] [2022-11-02 20:45:23,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:24,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-02 20:45:24,135 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:45:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:24,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1804113277, now seen corresponding path program 1 times [2022-11-02 20:45:24,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:24,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254983564] [2022-11-02 20:45:24,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:24,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:26,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:45:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:26,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:45:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:26,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:45:26,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-02 20:45:27,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:27,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254983564] [2022-11-02 20:45:27,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254983564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:27,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964221278] [2022-11-02 20:45:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:27,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:27,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:27,281 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:27,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:45:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:27,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 127 conjunts are in the unsatisfiable core [2022-11-02 20:45:27,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:27,660 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 [2022-11-02 20:45:28,034 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 5 treesize of output 3 [2022-11-02 20:45:28,225 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-02 20:45:28,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2022-11-02 20:45:28,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:45:28,415 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 13 treesize of output 9 [2022-11-02 20:45:28,906 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:45:28,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 27 [2022-11-02 20:45:28,914 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:45:28,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:45:29,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:29,341 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-02 20:45:29,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 58 [2022-11-02 20:45:29,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:29,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:29,361 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:45:29,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-11-02 20:45:29,378 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-02 20:45:29,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-02 20:45:30,408 INFO L356 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2022-11-02 20:45:30,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 133 treesize of output 98 [2022-11-02 20:45:30,437 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-11-02 20:45:30,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 47 [2022-11-02 20:45:30,569 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:45:30,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 27 [2022-11-02 20:45:30,799 INFO L356 Elim1Store]: treesize reduction 20, result has 13.0 percent of original size [2022-11-02 20:45:30,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 16 [2022-11-02 20:45:30,942 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:30,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:31,019 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 8 treesize of output 6 [2022-11-02 20:45:31,524 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3824 Int) (v_ArrVal_3823 (Array Int Int))) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base|) (+ |c_ULTIMATE.start_sll_append_~last~0#1.offset| 4) v_ArrVal_3824)))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (<= 0 (select (select .cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_3823) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ .cse1 4))) (not (<= 0 .cse1)))))) is different from false [2022-11-02 20:45:32,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964221278] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:32,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:45:32,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 67 [2022-11-02 20:45:32,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152784880] [2022-11-02 20:45:32,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:32,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-02 20:45:32,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:32,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-02 20:45:32,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=6497, Unknown=3, NotChecked=162, Total=6972 [2022-11-02 20:45:32,871 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 68 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 60 states have internal predecessors, (106), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:45:39,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:45:39,439 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2022-11-02 20:45:39,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-02 20:45:39,439 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 60 states have internal predecessors, (106), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 63 [2022-11-02 20:45:39,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:45:39,440 INFO L225 Difference]: With dead ends: 118 [2022-11-02 20:45:39,440 INFO L226 Difference]: Without dead ends: 118 [2022-11-02 20:45:39,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3111 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=944, Invalid=12863, Unknown=3, NotChecked=232, Total=14042 [2022-11-02 20:45:39,442 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 181 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 1860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:45:39,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1081 Invalid, 1860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1579 Invalid, 0 Unknown, 164 Unchecked, 1.3s Time] [2022-11-02 20:45:39,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-02 20:45:39,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2022-11-02 20:45:39,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 106 states have internal predecessors, (115), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:45:39,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2022-11-02 20:45:39,455 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 63 [2022-11-02 20:45:39,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:45:39,456 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2022-11-02 20:45:39,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 60 states have internal predecessors, (106), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:45:39,456 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2022-11-02 20:45:39,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-02 20:45:39,460 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:39,460 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-11-02 20:45:39,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-11-02 20:45:39,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-02 20:45:39,675 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:45:39,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:39,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1413927454, now seen corresponding path program 1 times [2022-11-02 20:45:39,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:39,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445457742] [2022-11-02 20:45:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:39,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:42,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:45:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:42,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:45:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:43,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:45:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:45:44,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:45:44,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445457742] [2022-11-02 20:45:44,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445457742] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:44,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079073844] [2022-11-02 20:45:44,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:44,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:44,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:44,286 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:44,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:45:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:45:44,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 165 conjunts are in the unsatisfiable core [2022-11-02 20:45:44,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:45:44,798 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:45:45,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:45,144 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 [2022-11-02 20:45:45,388 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 5 treesize of output 3 [2022-11-02 20:45:45,391 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 7 treesize of output 3 [2022-11-02 20:45:45,932 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-02 20:45:45,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2022-11-02 20:45:45,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-02 20:45:46,211 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 13 treesize of output 9 [2022-11-02 20:45:46,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-02 20:45:46,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-02 20:45:46,972 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:45:46,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 39 [2022-11-02 20:45:46,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-02 20:45:46,984 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 7 treesize of output 3 [2022-11-02 20:45:46,991 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:45:46,992 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-11-02 20:45:47,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:47,605 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-02 20:45:47,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 74 [2022-11-02 20:45:47,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:47,617 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2022-11-02 20:45:47,642 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-11-02 20:45:47,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2022-11-02 20:45:47,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:47,653 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-02 20:45:47,653 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-11-02 20:45:49,062 INFO L356 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2022-11-02 20:45:49,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 215 treesize of output 168 [2022-11-02 20:45:49,103 INFO L356 Elim1Store]: treesize reduction 120, result has 20.0 percent of original size [2022-11-02 20:45:49,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 124 [2022-11-02 20:45:49,113 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 15 treesize of output 3 [2022-11-02 20:45:49,132 INFO L356 Elim1Store]: treesize reduction 31, result has 48.3 percent of original size [2022-11-02 20:45:49,132 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 1 case distinctions, treesize of input 53 treesize of output 58 [2022-11-02 20:45:49,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:45:49,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:45:49,723 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:45:49,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 46 [2022-11-02 20:45:49,736 INFO L356 Elim1Store]: treesize reduction 20, result has 13.0 percent of original size [2022-11-02 20:45:49,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 16 [2022-11-02 20:45:50,211 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 15 treesize of output 7 [2022-11-02 20:45:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:45:50,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:45:50,605 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4020 (Array Int Int)) (v_ArrVal_4019 Int) (v_ArrVal_4018 Int)) (let ((.cse0 (+ |c_ULTIMATE.start_sll_append_~last~0#1.offset| 4))) (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse0 v_ArrVal_4019)))) (let ((.cse5 (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_sll_append_~last~0#1.base| v_ArrVal_4020))) (let ((.cse2 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse3 (+ .cse5 4))) (select (select (store |c_#memory_int| |c_ULTIMATE.start_sll_append_~last~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_sll_append_~last~0#1.base|) .cse0 v_ArrVal_4018)) (select (select .cse1 .cse2) .cse3)) (select (select .cse4 .cse2) .cse3))))) (<= (+ .cse5 1) 0)))))) is different from false [2022-11-02 20:45:53,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079073844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:45:53,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:45:53,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 39] total 77 [2022-11-02 20:45:53,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379125743] [2022-11-02 20:45:53,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:45:53,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-02 20:45:53,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:45:53,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-02 20:45:53,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=7033, Unknown=6, NotChecked=168, Total=7482 [2022-11-02 20:45:53,430 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 77 states, 75 states have (on average 1.5466666666666666) internal successors, (116), 69 states have internal predecessors, (116), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:46:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:46:00,504 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2022-11-02 20:46:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:46:00,504 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 75 states have (on average 1.5466666666666666) internal successors, (116), 69 states have internal predecessors, (116), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 65 [2022-11-02 20:46:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:46:00,505 INFO L225 Difference]: With dead ends: 128 [2022-11-02 20:46:00,505 INFO L226 Difference]: Without dead ends: 128 [2022-11-02 20:46:00,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2070 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=551, Invalid=11877, Unknown=8, NotChecked=220, Total=12656 [2022-11-02 20:46:00,507 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 66 mSDsluCounter, 1506 mSDsCounter, 0 mSdLazyCounter, 2036 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1548 SdHoareTripleChecker+Invalid, 2288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:46:00,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 1548 Invalid, 2288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2036 Invalid, 0 Unknown, 203 Unchecked, 1.8s Time] [2022-11-02 20:46:00,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-02 20:46:00,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-11-02 20:46:00,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 109 states have (on average 1.18348623853211) internal successors, (129), 120 states have internal predecessors, (129), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 20:46:00,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 139 transitions. [2022-11-02 20:46:00,511 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 139 transitions. Word has length 65 [2022-11-02 20:46:00,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:46:00,511 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 139 transitions. [2022-11-02 20:46:00,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 75 states have (on average 1.5466666666666666) internal successors, (116), 69 states have internal predecessors, (116), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:46:00,512 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 139 transitions. [2022-11-02 20:46:00,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 20:46:00,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:46:00,513 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:46:00,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:00,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-02 20:46:00,721 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:46:00,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:00,722 INFO L85 PathProgramCache]: Analyzing trace with hash -655878667, now seen corresponding path program 3 times [2022-11-02 20:46:00,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:00,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898458823] [2022-11-02 20:46:00,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:00,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:00,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:00,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:46:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:00,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:46:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:00,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-02 20:46:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:00,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-02 20:46:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:00,878 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-02 20:46:00,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:46:00,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898458823] [2022-11-02 20:46:00,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898458823] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:46:00,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60153966] [2022-11-02 20:46:00,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:46:00,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:00,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:46:00,880 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:46:00,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:46:01,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:46:01,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:46:01,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 20:46:01,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:46:01,591 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:46:01,591 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:46:01,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60153966] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:46:01,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:46:01,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-02 20:46:01,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103086135] [2022-11-02 20:46:01,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:46:01,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:46:01,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:46:01,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:46:01,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:46:01,593 INFO L87 Difference]: Start difference. First operand 127 states and 139 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:46:01,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:46:01,611 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2022-11-02 20:46:01,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:46:01,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 66 [2022-11-02 20:46:01,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:46:01,616 INFO L225 Difference]: With dead ends: 77 [2022-11-02 20:46:01,616 INFO L226 Difference]: Without dead ends: 77 [2022-11-02 20:46:01,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:46:01,617 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 92 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:46:01,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 91 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:46:01,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-02 20:46:01,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-02 20:46:01,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.1904761904761905) internal successors, (75), 72 states have internal predecessors, (75), 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) [2022-11-02 20:46:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-11-02 20:46:01,621 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 66 [2022-11-02 20:46:01,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:46:01,621 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-11-02 20:46:01,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-02 20:46:01,621 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-11-02 20:46:01,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-02 20:46:01,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:46:01,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2022-11-02 20:46:01,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:46:01,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2153aada-91d2-48d9-9dc1-2561300c630d/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:46:01,827 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-02 20:46:01,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:46:01,827 INFO L85 PathProgramCache]: Analyzing trace with hash -882077631, now seen corresponding path program 2 times [2022-11-02 20:46:01,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:46:01,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105319517] [2022-11-02 20:46:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:46:01,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:46:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:04,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:46:04,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:04,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 20:46:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:46:05,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 20:46:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat