./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-regression/nested_structure_ptr-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-regression/nested_structure_ptr-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 532f8ac4bbdad01460264d633faceee5f4b67e1373b30a1d79a963f63e1a40d6 --- 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-4e7fbc6 [2022-11-23 14:42:43,048 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:42:43,049 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:42:43,071 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:42:43,072 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:42:43,073 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:42:43,074 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:42:43,076 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:42:43,078 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:42:43,079 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:42:43,080 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:42:43,081 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:42:43,082 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:42:43,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:42:43,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:42:43,094 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:42:43,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:42:43,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:42:43,098 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:42:43,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:42:43,107 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:42:43,108 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:42:43,110 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:42:43,111 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:42:43,115 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:42:43,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:42:43,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:42:43,117 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:42:43,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:42:43,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:42:43,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:42:43,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:42:43,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:42:43,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:42:43,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:42:43,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:42:43,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:42:43,125 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:42:43,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:42:43,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:42:43,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:42:43,129 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 14:42:43,154 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:42:43,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:42:43,155 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:42:43,155 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:42:43,156 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:42:43,156 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:42:43,157 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:42:43,157 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:42:43,157 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:42:43,158 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:42:43,158 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:42:43,158 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:42:43,159 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:42:43,159 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:42:43,159 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:42:43,160 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:42:43,160 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:42:43,160 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:42:43,161 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:42:43,161 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:42:43,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:42:43,162 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:42:43,162 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:42:43,163 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:42:43,163 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:42:43,163 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:42:43,163 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:42:43,164 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:42:43,164 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:42:43,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:42:43,165 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:42:43,165 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:42:43,165 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:42:43,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:42:43,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:42:43,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:42:43,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:42:43,167 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:42:43,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:42:43,167 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:42:43,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:42:43,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:42:43,168 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_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 532f8ac4bbdad01460264d633faceee5f4b67e1373b30a1d79a963f63e1a40d6 [2022-11-23 14:42:43,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:42:43,423 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:42:43,425 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:42:43,427 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:42:43,427 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:42:43,429 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/ldv-regression/nested_structure_ptr-1.i [2022-11-23 14:42:46,542 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:42:46,744 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:42:46,744 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/sv-benchmarks/c/ldv-regression/nested_structure_ptr-1.i [2022-11-23 14:42:46,751 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW/data/a72fc3e59/0940ed7e77fe44448ba22948d9d9fe85/FLAG2a8f734ee [2022-11-23 14:42:46,767 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW/data/a72fc3e59/0940ed7e77fe44448ba22948d9d9fe85 [2022-11-23 14:42:46,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:42:46,772 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:42:46,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:42:46,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:42:46,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:42:46,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:42:46" (1/1) ... [2022-11-23 14:42:46,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ff696f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:46, skipping insertion in model container [2022-11-23 14:42:46,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:42:46" (1/1) ... [2022-11-23 14:42:46,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:42:46,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:42:46,957 WARN L237 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_a57e9708-3195-487b-9fe3-790b99cb5367/sv-benchmarks/c/ldv-regression/nested_structure_ptr-1.i[308,321] [2022-11-23 14:42:46,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:42:46,989 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:42:46,999 WARN L237 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_a57e9708-3195-487b-9fe3-790b99cb5367/sv-benchmarks/c/ldv-regression/nested_structure_ptr-1.i[308,321] [2022-11-23 14:42:47,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:42:47,019 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:42:47,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:47 WrapperNode [2022-11-23 14:42:47,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:42:47,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:42:47,022 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:42:47,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:42:47,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:47" (1/1) ... [2022-11-23 14:42:47,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:47" (1/1) ... [2022-11-23 14:42:47,055 INFO L138 Inliner]: procedures = 16, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2022-11-23 14:42:47,056 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:42:47,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:42:47,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:42:47,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:42:47,067 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:47" (1/1) ... [2022-11-23 14:42:47,067 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:47" (1/1) ... [2022-11-23 14:42:47,070 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:47" (1/1) ... [2022-11-23 14:42:47,070 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:47" (1/1) ... [2022-11-23 14:42:47,076 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:47" (1/1) ... [2022-11-23 14:42:47,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:47" (1/1) ... [2022-11-23 14:42:47,080 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:47" (1/1) ... [2022-11-23 14:42:47,081 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:47" (1/1) ... [2022-11-23 14:42:47,083 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:42:47,084 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:42:47,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:42:47,084 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:42:47,085 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:47" (1/1) ... [2022-11-23 14:42:47,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:42:47,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:42:47,117 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:42:47,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:42:47,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:42:47,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:42:47,157 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:42:47,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:42:47,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:42:47,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:42:47,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:42:47,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:42:47,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:42:47,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:42:47,242 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:42:47,244 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:42:47,459 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:42:47,481 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:42:47,481 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 14:42:47,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:42:47 BoogieIcfgContainer [2022-11-23 14:42:47,484 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:42:47,486 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:42:47,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:42:47,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:42:47,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:42:46" (1/3) ... [2022-11-23 14:42:47,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d8fd17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:42:47, skipping insertion in model container [2022-11-23 14:42:47,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:42:47" (2/3) ... [2022-11-23 14:42:47,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36d8fd17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:42:47, skipping insertion in model container [2022-11-23 14:42:47,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:42:47" (3/3) ... [2022-11-23 14:42:47,493 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_structure_ptr-1.i [2022-11-23 14:42:47,529 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:42:47,529 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-11-23 14:42:47,610 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:42:47,616 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;@bdc017a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:42:47,617 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-11-23 14:42:47,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:42:47,626 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:47,626 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:42:47,627 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 14:42:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:47,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2205, now seen corresponding path program 1 times [2022-11-23 14:42:47,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:47,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238824874] [2022-11-23 14:42:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:47,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:47,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:47,983 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:47,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238824874] [2022-11-23 14:42:47,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238824874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:47,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:47,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:42:47,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10358267] [2022-11-23 14:42:47,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:47,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:47,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:48,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:48,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:48,039 INFO L87 Difference]: Start difference. First operand has 26 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:48,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:48,108 INFO L93 Difference]: Finished difference Result 24 states and 23 transitions. [2022-11-23 14:42:48,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:48,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-23 14:42:48,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:48,121 INFO L225 Difference]: With dead ends: 24 [2022-11-23 14:42:48,121 INFO L226 Difference]: Without dead ends: 23 [2022-11-23 14:42:48,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:48,126 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:48,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:48,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-23 14:42:48,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-23 14:42:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 11 states have (on average 2.0) internal successors, (22), 22 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:48,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 22 transitions. [2022-11-23 14:42:48,160 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 22 transitions. Word has length 2 [2022-11-23 14:42:48,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:48,161 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 22 transitions. [2022-11-23 14:42:48,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 22 transitions. [2022-11-23 14:42:48,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 14:42:48,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:48,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 14:42:48,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:42:48,163 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 14:42:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:48,164 INFO L85 PathProgramCache]: Analyzing trace with hash 2206, now seen corresponding path program 1 times [2022-11-23 14:42:48,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:48,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313624872] [2022-11-23 14:42:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:48,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:48,320 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:48,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313624872] [2022-11-23 14:42:48,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313624872] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:48,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:48,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:42:48,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690821288] [2022-11-23 14:42:48,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:48,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:42:48,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:48,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:42:48,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:48,326 INFO L87 Difference]: Start difference. First operand 23 states and 22 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:48,367 INFO L93 Difference]: Finished difference Result 21 states and 20 transitions. [2022-11-23 14:42:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:42:48,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2 [2022-11-23 14:42:48,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:48,370 INFO L225 Difference]: With dead ends: 21 [2022-11-23 14:42:48,370 INFO L226 Difference]: Without dead ends: 21 [2022-11-23 14:42:48,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:42:48,380 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:48,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:48,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-23 14:42:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-23 14:42:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 20 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:48,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 20 transitions. [2022-11-23 14:42:48,390 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 20 transitions. Word has length 2 [2022-11-23 14:42:48,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:48,392 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 20 transitions. [2022-11-23 14:42:48,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:48,393 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 20 transitions. [2022-11-23 14:42:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:42:48,394 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:48,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:42:48,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:42:48,395 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 14:42:48,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:48,398 INFO L85 PathProgramCache]: Analyzing trace with hash 68331, now seen corresponding path program 1 times [2022-11-23 14:42:48,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:48,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705353449] [2022-11-23 14:42:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:48,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:48,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:48,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:48,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705353449] [2022-11-23 14:42:48,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705353449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:48,579 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:48,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:42:48,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940964210] [2022-11-23 14:42:48,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:48,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:42:48,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:48,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:42:48,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:42:48,581 INFO L87 Difference]: Start difference. First operand 21 states and 20 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:48,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:48,630 INFO L93 Difference]: Finished difference Result 20 states and 19 transitions. [2022-11-23 14:42:48,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:42:48,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:42:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:48,631 INFO L225 Difference]: With dead ends: 20 [2022-11-23 14:42:48,631 INFO L226 Difference]: Without dead ends: 20 [2022-11-23 14:42:48,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:42:48,633 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:48,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:48,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-11-23 14:42:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-11-23 14:42:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 19 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:48,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2022-11-23 14:42:48,637 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 3 [2022-11-23 14:42:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:48,638 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2022-11-23 14:42:48,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:48,638 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2022-11-23 14:42:48,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-23 14:42:48,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:48,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-23 14:42:48,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:42:48,640 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 14:42:48,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:48,640 INFO L85 PathProgramCache]: Analyzing trace with hash 68332, now seen corresponding path program 1 times [2022-11-23 14:42:48,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:48,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328631610] [2022-11-23 14:42:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:48,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:48,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:48,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:48,909 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:48,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328631610] [2022-11-23 14:42:48,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328631610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:48,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:48,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:42:48,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830605587] [2022-11-23 14:42:48,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:48,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:42:48,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:48,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:42:48,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:42:48,913 INFO L87 Difference]: Start difference. First operand 20 states and 19 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:48,954 INFO L93 Difference]: Finished difference Result 19 states and 18 transitions. [2022-11-23 14:42:48,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:42:48,955 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-23 14:42:48,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:48,956 INFO L225 Difference]: With dead ends: 19 [2022-11-23 14:42:48,956 INFO L226 Difference]: Without dead ends: 19 [2022-11-23 14:42:48,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:42:48,957 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:48,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:48,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-23 14:42:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-23 14:42:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 18 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:48,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 18 transitions. [2022-11-23 14:42:48,961 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 18 transitions. Word has length 3 [2022-11-23 14:42:48,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:48,962 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 18 transitions. [2022-11-23 14:42:48,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 18 transitions. [2022-11-23 14:42:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 14:42:48,962 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:48,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 14:42:48,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:42:48,963 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 14:42:48,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:48,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2118240, now seen corresponding path program 1 times [2022-11-23 14:42:48,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:48,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444762333] [2022-11-23 14:42:48,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:48,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:49,270 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:49,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444762333] [2022-11-23 14:42:49,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444762333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:49,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:49,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:42:49,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054453819] [2022-11-23 14:42:49,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:49,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:42:49,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:49,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:42:49,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:42:49,273 INFO L87 Difference]: Start difference. First operand 19 states and 18 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:49,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:49,361 INFO L93 Difference]: Finished difference Result 18 states and 17 transitions. [2022-11-23 14:42:49,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:42:49,362 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 14:42:49,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:49,362 INFO L225 Difference]: With dead ends: 18 [2022-11-23 14:42:49,362 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 14:42:49,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:42:49,364 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:49,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 27 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:49,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 14:42:49,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-23 14:42:49,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 17 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 17 transitions. [2022-11-23 14:42:49,367 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 17 transitions. Word has length 4 [2022-11-23 14:42:49,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:49,368 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 17 transitions. [2022-11-23 14:42:49,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:49,368 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 17 transitions. [2022-11-23 14:42:49,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 14:42:49,369 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:49,369 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 14:42:49,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:42:49,369 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 14:42:49,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2118241, now seen corresponding path program 1 times [2022-11-23 14:42:49,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:49,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395724897] [2022-11-23 14:42:49,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:49,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:49,770 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:49,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395724897] [2022-11-23 14:42:49,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395724897] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:49,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:49,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:42:49,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837443107] [2022-11-23 14:42:49,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:49,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:42:49,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:49,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:42:49,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:42:49,774 INFO L87 Difference]: Start difference. First operand 18 states and 17 transitions. Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:49,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:49,871 INFO L93 Difference]: Finished difference Result 17 states and 16 transitions. [2022-11-23 14:42:49,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:42:49,872 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-23 14:42:49,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:49,873 INFO L225 Difference]: With dead ends: 17 [2022-11-23 14:42:49,873 INFO L226 Difference]: Without dead ends: 17 [2022-11-23 14:42:49,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:42:49,876 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:49,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:49,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-23 14:42:49,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-11-23 14:42:49,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 16 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:49,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 16 transitions. [2022-11-23 14:42:49,883 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 16 transitions. Word has length 4 [2022-11-23 14:42:49,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:49,883 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 16 transitions. [2022-11-23 14:42:49,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:49,883 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 16 transitions. [2022-11-23 14:42:49,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:42:49,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:49,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:42:49,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:42:49,886 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 14:42:49,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:49,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2035656929, now seen corresponding path program 1 times [2022-11-23 14:42:49,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:49,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841489138] [2022-11-23 14:42:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:49,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:50,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:50,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841489138] [2022-11-23 14:42:50,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841489138] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:50,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:50,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:42:50,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112984313] [2022-11-23 14:42:50,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:50,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:42:50,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:50,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:42:50,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:42:50,247 INFO L87 Difference]: Start difference. First operand 17 states and 16 transitions. Second operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:50,427 INFO L93 Difference]: Finished difference Result 16 states and 15 transitions. [2022-11-23 14:42:50,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:42:50,428 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 14:42:50,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:50,429 INFO L225 Difference]: With dead ends: 16 [2022-11-23 14:42:50,429 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 14:42:50,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:42:50,431 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:50,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 19 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:50,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 14:42:50,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 14:42:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 15 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 15 transitions. [2022-11-23 14:42:50,435 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 15 transitions. Word has length 6 [2022-11-23 14:42:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:50,436 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 15 transitions. [2022-11-23 14:42:50,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:50,436 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 15 transitions. [2022-11-23 14:42:50,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:42:50,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:50,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:42:50,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:42:50,438 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 14:42:50,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:50,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2035656930, now seen corresponding path program 1 times [2022-11-23 14:42:50,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:50,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599188350] [2022-11-23 14:42:50,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:50,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:50,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:50,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:50,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599188350] [2022-11-23 14:42:50,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599188350] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:50,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:50,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:42:50,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076545530] [2022-11-23 14:42:50,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:50,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:42:50,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:50,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:42:50,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:42:50,847 INFO L87 Difference]: Start difference. First operand 16 states and 15 transitions. Second operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:50,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:50,964 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2022-11-23 14:42:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:42:50,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 14:42:50,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:50,965 INFO L225 Difference]: With dead ends: 15 [2022-11-23 14:42:50,965 INFO L226 Difference]: Without dead ends: 15 [2022-11-23 14:42:50,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:42:50,967 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:50,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 19 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:50,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-23 14:42:50,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-23 14:42:50,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 14 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:50,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2022-11-23 14:42:50,970 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 6 [2022-11-23 14:42:50,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:50,970 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2022-11-23 14:42:50,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:50,972 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2022-11-23 14:42:50,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:42:50,973 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:50,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:50,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:42:50,973 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 14:42:50,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:50,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1319144652, now seen corresponding path program 1 times [2022-11-23 14:42:50,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:50,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307297370] [2022-11-23 14:42:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:50,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:51,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:51,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307297370] [2022-11-23 14:42:51,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307297370] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:51,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:51,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:42:51,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136478556] [2022-11-23 14:42:51,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:51,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:42:51,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:51,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:42:51,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:42:51,653 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:51,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:51,854 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2022-11-23 14:42:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:42:51,854 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 14:42:51,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:51,855 INFO L225 Difference]: With dead ends: 14 [2022-11-23 14:42:51,855 INFO L226 Difference]: Without dead ends: 14 [2022-11-23 14:42:51,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:42:51,858 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:51,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 10 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:51,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-23 14:42:51,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-23 14:42:51,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 13 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:51,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2022-11-23 14:42:51,863 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 7 [2022-11-23 14:42:51,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:51,863 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2022-11-23 14:42:51,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:51,863 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2022-11-23 14:42:51,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:42:51,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:51,864 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:51,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:42:51,864 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 14:42:51,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:51,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1319144651, now seen corresponding path program 1 times [2022-11-23 14:42:51,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:51,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657600058] [2022-11-23 14:42:51,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:51,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:52,452 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:52,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657600058] [2022-11-23 14:42:52,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657600058] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:52,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:52,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:42:52,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262442390] [2022-11-23 14:42:52,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:52,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:42:52,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:52,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:42:52,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:42:52,455 INFO L87 Difference]: Start difference. First operand 14 states and 13 transitions. Second operand has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:52,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:52,633 INFO L93 Difference]: Finished difference Result 13 states and 12 transitions. [2022-11-23 14:42:52,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:42:52,634 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 14:42:52,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:52,635 INFO L225 Difference]: With dead ends: 13 [2022-11-23 14:42:52,635 INFO L226 Difference]: Without dead ends: 13 [2022-11-23 14:42:52,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:42:52,636 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:52,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 17 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:52,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-23 14:42:52,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-23 14:42:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 12 transitions. [2022-11-23 14:42:52,639 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 12 transitions. Word has length 7 [2022-11-23 14:42:52,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:52,639 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 12 transitions. [2022-11-23 14:42:52,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.0) internal successors, (7), 7 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:52,640 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 12 transitions. [2022-11-23 14:42:52,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:42:52,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:52,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:52,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:42:52,641 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 14:42:52,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:52,641 INFO L85 PathProgramCache]: Analyzing trace with hash -682658379, now seen corresponding path program 1 times [2022-11-23 14:42:52,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:52,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169186381] [2022-11-23 14:42:52,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:52,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:53,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:53,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169186381] [2022-11-23 14:42:53,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169186381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:53,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:53,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:42:53,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357760432] [2022-11-23 14:42:53,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:53,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:42:53,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:53,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:42:53,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:42:53,328 INFO L87 Difference]: Start difference. First operand 13 states and 12 transitions. Second operand has 9 states, 9 states have (on average 1.0) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:53,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:53,564 INFO L93 Difference]: Finished difference Result 11 states and 10 transitions. [2022-11-23 14:42:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:42:53,565 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.0) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 14:42:53,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:53,565 INFO L225 Difference]: With dead ends: 11 [2022-11-23 14:42:53,566 INFO L226 Difference]: Without dead ends: 11 [2022-11-23 14:42:53,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:42:53,567 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:53,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 9 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:42:53,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-23 14:42:53,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-23 14:42:53,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.0) internal successors, (10), 10 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 10 transitions. [2022-11-23 14:42:53,569 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 10 transitions. Word has length 9 [2022-11-23 14:42:53,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:53,569 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 10 transitions. [2022-11-23 14:42:53,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.0) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:53,570 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 10 transitions. [2022-11-23 14:42:53,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:42:53,570 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:42:53,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:53,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:42:53,571 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-11-23 14:42:53,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:42:53,571 INFO L85 PathProgramCache]: Analyzing trace with hash 312424999, now seen corresponding path program 1 times [2022-11-23 14:42:53,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:42:53,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518422049] [2022-11-23 14:42:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:42:53,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:42:53,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:42:53,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:42:53,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:42:53,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518422049] [2022-11-23 14:42:53,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518422049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:42:53,788 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:42:53,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:42:53,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091058305] [2022-11-23 14:42:53,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:42:53,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:42:53,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:42:53,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:42:53,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:42:53,792 INFO L87 Difference]: Start difference. First operand 11 states and 10 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:42:53,824 INFO L93 Difference]: Finished difference Result 10 states and 9 transitions. [2022-11-23 14:42:53,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:42:53,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 14:42:53,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:42:53,828 INFO L225 Difference]: With dead ends: 10 [2022-11-23 14:42:53,828 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 14:42:53,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:42:53,829 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:42:53,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:42:53,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 14:42:53,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 14:42:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:53,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 14:42:53,831 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10 [2022-11-23 14:42:53,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:42:53,832 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 14:42:53,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:42:53,832 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 14:42:53,833 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 14:42:53,839 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 14 remaining) [2022-11-23 14:42:53,840 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2022-11-23 14:42:53,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2022-11-23 14:42:53,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2022-11-23 14:42:53,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2022-11-23 14:42:53,841 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2022-11-23 14:42:53,842 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2022-11-23 14:42:53,842 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 14 remaining) [2022-11-23 14:42:53,842 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 14 remaining) [2022-11-23 14:42:53,842 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 14 remaining) [2022-11-23 14:42:53,843 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2022-11-23 14:42:53,843 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2022-11-23 14:42:53,843 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (1 of 14 remaining) [2022-11-23 14:42:53,843 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK (0 of 14 remaining) [2022-11-23 14:42:53,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:42:53,848 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:42:53,851 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 14:42:53,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:42:53 BoogieIcfgContainer [2022-11-23 14:42:53,855 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 14:42:53,856 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 14:42:53,856 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 14:42:53,856 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 14:42:53,857 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:42:47" (3/4) ... [2022-11-23 14:42:53,860 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-23 14:42:53,871 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2022-11-23 14:42:53,871 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-11-23 14:42:53,872 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2022-11-23 14:42:53,872 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-23 14:42:53,903 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 14:42:53,904 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 14:42:53,904 INFO L158 Benchmark]: Toolchain (without parser) took 7132.80ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 128.5MB in the beginning and 82.5MB in the end (delta: 46.0MB). Peak memory consumption was 82.4MB. Max. memory is 16.1GB. [2022-11-23 14:42:53,905 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 127.9MB. Free memory was 70.2MB in the beginning and 70.1MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:42:53,905 INFO L158 Benchmark]: CACSL2BoogieTranslator took 246.92ms. Allocated memory is still 167.8MB. Free memory was 128.2MB in the beginning and 118.0MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 14:42:53,906 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.58ms. Allocated memory is still 167.8MB. Free memory was 118.0MB in the beginning and 116.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:42:53,906 INFO L158 Benchmark]: Boogie Preprocessor took 26.21ms. Allocated memory is still 167.8MB. Free memory was 116.4MB in the beginning and 115.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:42:53,906 INFO L158 Benchmark]: RCFGBuilder took 400.33ms. Allocated memory is still 167.8MB. Free memory was 115.2MB in the beginning and 101.7MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-23 14:42:53,907 INFO L158 Benchmark]: TraceAbstraction took 6368.56ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 101.3MB in the beginning and 85.6MB in the end (delta: 15.6MB). Peak memory consumption was 51.0MB. Max. memory is 16.1GB. [2022-11-23 14:42:53,907 INFO L158 Benchmark]: Witness Printer took 48.35ms. Allocated memory is still 201.3MB. Free memory was 85.6MB in the beginning and 82.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-23 14:42:53,909 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 127.9MB. Free memory was 70.2MB in the beginning and 70.1MB in the end (delta: 117.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 246.92ms. Allocated memory is still 167.8MB. Free memory was 128.2MB in the beginning and 118.0MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.58ms. Allocated memory is still 167.8MB. Free memory was 118.0MB in the beginning and 116.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.21ms. Allocated memory is still 167.8MB. Free memory was 116.4MB in the beginning and 115.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 400.33ms. Allocated memory is still 167.8MB. Free memory was 115.2MB in the beginning and 101.7MB in the end (delta: 13.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 6368.56ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 101.3MB in the beginning and 85.6MB in the end (delta: 15.6MB). Peak memory consumption was 51.0MB. Max. memory is 16.1GB. * Witness Printer took 48.35ms. Allocated memory is still 201.3MB. Free memory was 85.6MB in the beginning and 82.5MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 12]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 27]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 14 error locations. Started 1 CEGAR loops. OverallTime: 6.3s, OverallIterations: 12, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 169 SdHoareTripleChecker+Valid, 0.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 169 mSDsluCounter, 203 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 113 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 324 IncrementalHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 90 mSDtfsCounter, 324 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 69 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, InterpolantAutomatonStates: 65, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.1s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 51 ConstructedInterpolants, 0 QuantifiedInterpolants, 1370 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 12 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 14 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-23 14:42:53,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a57e9708-3195-487b-9fe3-790b99cb5367/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE