./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --- 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-8393723 [2022-11-18 20:43:14,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:43:14,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:43:14,901 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:43:14,902 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:43:14,903 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:43:14,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:43:14,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:43:14,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:43:14,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:43:14,911 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:43:14,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:43:14,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:43:14,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:43:14,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:43:14,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:43:14,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:43:14,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:43:14,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:43:14,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:43:14,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:43:14,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:43:14,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:43:14,929 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:43:14,933 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:43:14,934 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:43:14,934 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:43:14,935 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:43:14,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:43:14,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:43:14,937 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:43:14,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:43:14,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:43:14,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:43:14,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:43:14,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:43:14,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:43:14,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:43:14,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:43:14,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:43:14,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:43:14,949 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 20:43:14,982 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:43:14,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:43:14,991 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:43:14,992 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:43:14,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:43:14,993 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:43:14,994 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:43:14,995 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:43:14,995 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:43:14,995 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:43:14,996 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:43:14,996 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:43:14,997 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:43:14,997 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:43:14,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:43:14,997 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:43:14,998 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:43:14,998 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:43:14,998 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:43:14,998 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:43:14,998 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:43:14,999 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:43:14,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:43:14,999 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:43:14,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:43:15,000 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:43:15,001 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:43:15,001 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:43:15,001 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:43:15,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:43:15,001 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_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2022-11-18 20:43:15,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:43:15,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:43:15,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:43:15,364 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:43:15,365 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:43:15,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-11-18 20:43:15,452 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/data/bc488680c/5123e9f690f340a98755d76bdb3a952d/FLAG87de8431b [2022-11-18 20:43:16,086 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:43:16,089 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-11-18 20:43:16,111 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/data/bc488680c/5123e9f690f340a98755d76bdb3a952d/FLAG87de8431b [2022-11-18 20:43:16,442 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/data/bc488680c/5123e9f690f340a98755d76bdb3a952d [2022-11-18 20:43:16,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:43:16,446 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:43:16,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:43:16,448 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:43:16,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:43:16,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:43:16" (1/1) ... [2022-11-18 20:43:16,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e8738a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:16, skipping insertion in model container [2022-11-18 20:43:16,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:43:16" (1/1) ... [2022-11-18 20:43:16,463 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:43:16,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:43:17,186 WARN L234 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_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2022-11-18 20:43:17,254 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:43:17,346 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:43:17,399 WARN L234 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_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2022-11-18 20:43:17,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:43:17,500 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:43:17,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:17 WrapperNode [2022-11-18 20:43:17,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:43:17,504 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:43:17,505 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:43:17,505 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:43:17,514 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:17" (1/1) ... [2022-11-18 20:43:17,548 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:17" (1/1) ... [2022-11-18 20:43:17,608 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 227 [2022-11-18 20:43:17,610 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:43:17,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:43:17,612 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:43:17,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:43:17,622 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:17" (1/1) ... [2022-11-18 20:43:17,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:17" (1/1) ... [2022-11-18 20:43:17,638 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:17" (1/1) ... [2022-11-18 20:43:17,645 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:17" (1/1) ... [2022-11-18 20:43:17,655 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:17" (1/1) ... [2022-11-18 20:43:17,675 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:17" (1/1) ... [2022-11-18 20:43:17,677 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:17" (1/1) ... [2022-11-18 20:43:17,679 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:17" (1/1) ... [2022-11-18 20:43:17,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:43:17,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:43:17,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:43:17,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:43:17,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:17" (1/1) ... [2022-11-18 20:43:17,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:43:17,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:43:17,736 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:43:17,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:43:17,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:43:17,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-18 20:43:17,785 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-18 20:43:17,785 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-18 20:43:17,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:43:17,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:43:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-18 20:43:17,786 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-18 20:43:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:43:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 20:43:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 20:43:17,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:43:17,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-18 20:43:17,787 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:43:17,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:43:17,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:43:17,789 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:43:18,035 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:43:18,041 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:43:18,503 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:43:18,513 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:43:18,513 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-18 20:43:18,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:43:18 BoogieIcfgContainer [2022-11-18 20:43:18,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:43:18,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:43:18,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:43:18,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:43:18,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:43:16" (1/3) ... [2022-11-18 20:43:18,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3a815e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:43:18, skipping insertion in model container [2022-11-18 20:43:18,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:43:17" (2/3) ... [2022-11-18 20:43:18,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3a815e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:43:18, skipping insertion in model container [2022-11-18 20:43:18,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:43:18" (3/3) ... [2022-11-18 20:43:18,538 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2022-11-18 20:43:18,557 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:43:18,557 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-11-18 20:43:18,557 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:43:18,684 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-18 20:43:18,723 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-18 20:43:18,738 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 267 places, 287 transitions, 596 flow [2022-11-18 20:43:18,741 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 267 places, 287 transitions, 596 flow [2022-11-18 20:43:18,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 287 transitions, 596 flow [2022-11-18 20:43:18,978 INFO L130 PetriNetUnfolder]: 54/537 cut-off events. [2022-11-18 20:43:18,979 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-18 20:43:18,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 537 events. 54/537 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2465 event pairs, 0 based on Foata normal form. 0/391 useless extension candidates. Maximal degree in co-relation 272. Up to 8 conditions per place. [2022-11-18 20:43:19,016 INFO L119 LiptonReduction]: Number of co-enabled transitions 27012 [2022-11-18 20:44:12,928 INFO L134 LiptonReduction]: Checked pairs total: 70991 [2022-11-18 20:44:12,929 INFO L136 LiptonReduction]: Total number of compositions: 259 [2022-11-18 20:44:12,938 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 101 places, 114 transitions, 250 flow [2022-11-18 20:44:13,625 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 17383 states, 14489 states have (on average 3.7555386845192906) internal successors, (54414), 17382 states have internal predecessors, (54414), 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) [2022-11-18 20:44:13,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:44:13,659 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;@78596ad5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:44:13,659 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2022-11-18 20:44:13,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 17383 states, 14489 states have (on average 3.7555386845192906) internal successors, (54414), 17382 states have internal predecessors, (54414), 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) [2022-11-18 20:44:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:44:13,818 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:13,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:44:13,819 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-18 20:44:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:13,828 INFO L85 PathProgramCache]: Analyzing trace with hash 36071, now seen corresponding path program 1 times [2022-11-18 20:44:13,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:13,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185675036] [2022-11-18 20:44:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:13,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:14,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:14,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:14,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185675036] [2022-11-18 20:44:14,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185675036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:14,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:44:14,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:44:14,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617102638] [2022-11-18 20:44:14,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:14,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:44:14,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:14,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:44:14,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:44:14,156 INFO L87 Difference]: Start difference. First operand has 17383 states, 14489 states have (on average 3.7555386845192906) internal successors, (54414), 17382 states have internal predecessors, (54414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 2.0) 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) [2022-11-18 20:44:14,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:14,686 INFO L93 Difference]: Finished difference Result 17379 states and 49559 transitions. [2022-11-18 20:44:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:44:14,689 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 2.0) 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 [2022-11-18 20:44:14,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:14,835 INFO L225 Difference]: With dead ends: 17379 [2022-11-18 20:44:14,835 INFO L226 Difference]: Without dead ends: 17343 [2022-11-18 20:44:14,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:44:14,840 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:14,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:44:14,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17343 states. [2022-11-18 20:44:15,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17343 to 17343. [2022-11-18 20:44:15,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17343 states, 14458 states have (on average 3.4211509199059345) internal successors, (49463), 17342 states have internal predecessors, (49463), 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) [2022-11-18 20:44:16,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17343 states to 17343 states and 49463 transitions. [2022-11-18 20:44:16,080 INFO L78 Accepts]: Start accepts. Automaton has 17343 states and 49463 transitions. Word has length 2 [2022-11-18 20:44:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:16,081 INFO L495 AbstractCegarLoop]: Abstraction has 17343 states and 49463 transitions. [2022-11-18 20:44:16,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 2.0) 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) [2022-11-18 20:44:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 17343 states and 49463 transitions. [2022-11-18 20:44:16,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-18 20:44:16,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:16,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-18 20:44:16,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:44:16,085 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-18 20:44:16,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:16,086 INFO L85 PathProgramCache]: Analyzing trace with hash 36091, now seen corresponding path program 1 times [2022-11-18 20:44:16,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:16,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461075638] [2022-11-18 20:44:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:16,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:16,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:16,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:16,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461075638] [2022-11-18 20:44:16,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461075638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:16,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:44:16,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-18 20:44:16,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41290695] [2022-11-18 20:44:16,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:16,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:44:16,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:16,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:44:16,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:44:16,557 INFO L87 Difference]: Start difference. First operand 17343 states and 49463 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) [2022-11-18 20:44:17,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:17,155 INFO L93 Difference]: Finished difference Result 17344 states and 49464 transitions. [2022-11-18 20:44:17,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:44:17,156 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 [2022-11-18 20:44:17,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:17,404 INFO L225 Difference]: With dead ends: 17344 [2022-11-18 20:44:17,404 INFO L226 Difference]: Without dead ends: 17344 [2022-11-18 20:44:17,426 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 [2022-11-18 20:44:17,430 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:17,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:44:17,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17344 states. [2022-11-18 20:44:18,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17344 to 17344. [2022-11-18 20:44:18,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17344 states, 14459 states have (on average 3.420983470502801) internal successors, (49464), 17343 states have internal predecessors, (49464), 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) [2022-11-18 20:44:18,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17344 states to 17344 states and 49464 transitions. [2022-11-18 20:44:18,592 INFO L78 Accepts]: Start accepts. Automaton has 17344 states and 49464 transitions. Word has length 2 [2022-11-18 20:44:18,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:18,593 INFO L495 AbstractCegarLoop]: Abstraction has 17344 states and 49464 transitions. [2022-11-18 20:44:18,593 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) [2022-11-18 20:44:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 17344 states and 49464 transitions. [2022-11-18 20:44:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-18 20:44:18,594 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:18,594 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-18 20:44:18,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:44:18,598 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-18 20:44:18,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:18,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1119975, now seen corresponding path program 1 times [2022-11-18 20:44:18,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:18,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6042693] [2022-11-18 20:44:18,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:18,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:18,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:18,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:18,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6042693] [2022-11-18 20:44:18,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6042693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:44:18,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012438363] [2022-11-18 20:44:18,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:18,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:18,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:44:18,971 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:44:18,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:44:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:19,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:44:19,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:19,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:44:19,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:44:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:19,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:44:21,447 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:44:21,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-11-18 20:44:23,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:23,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012438363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:44:23,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:44:23,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-18 20:44:23,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116450800] [2022-11-18 20:44:23,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:44:23,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:44:23,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:23,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:44:23,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:44:23,672 INFO L87 Difference]: Start difference. First operand 17344 states and 49464 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2022-11-18 20:44:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:24,205 INFO L93 Difference]: Finished difference Result 17346 states and 49468 transitions. [2022-11-18 20:44:24,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:44:24,206 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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 3 [2022-11-18 20:44:24,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:24,302 INFO L225 Difference]: With dead ends: 17346 [2022-11-18 20:44:24,302 INFO L226 Difference]: Without dead ends: 17346 [2022-11-18 20:44:24,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:44:24,304 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:24,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 43 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 185 Unchecked, 0.3s Time] [2022-11-18 20:44:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17346 states. [2022-11-18 20:44:24,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17346 to 17346. [2022-11-18 20:44:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17346 states, 14461 states have (on average 3.4207869441947305) internal successors, (49468), 17345 states have internal predecessors, (49468), 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) [2022-11-18 20:44:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17346 states to 17346 states and 49468 transitions. [2022-11-18 20:44:24,966 INFO L78 Accepts]: Start accepts. Automaton has 17346 states and 49468 transitions. Word has length 3 [2022-11-18 20:44:24,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:24,966 INFO L495 AbstractCegarLoop]: Abstraction has 17346 states and 49468 transitions. [2022-11-18 20:44:24,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2022-11-18 20:44:24,967 INFO L276 IsEmpty]: Start isEmpty. Operand 17346 states and 49468 transitions. [2022-11-18 20:44:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-18 20:44:24,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:24,967 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1] [2022-11-18 20:44:25,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 20:44:25,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:25,174 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-18 20:44:25,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:25,175 INFO L85 PathProgramCache]: Analyzing trace with hash 34720380, now seen corresponding path program 1 times [2022-11-18 20:44:25,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:25,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610599160] [2022-11-18 20:44:25,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:25,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:44:25,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:25,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610599160] [2022-11-18 20:44:25,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610599160] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:25,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:44:25,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:44:25,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193675542] [2022-11-18 20:44:25,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:25,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:44:25,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:25,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:44:25,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:44:25,297 INFO L87 Difference]: Start difference. First operand 17346 states and 49468 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2022-11-18 20:44:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:25,835 INFO L93 Difference]: Finished difference Result 20710 states and 58201 transitions. [2022-11-18 20:44:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:44:25,836 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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 [2022-11-18 20:44:25,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:25,924 INFO L225 Difference]: With dead ends: 20710 [2022-11-18 20:44:25,924 INFO L226 Difference]: Without dead ends: 20710 [2022-11-18 20:44:25,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:44:25,926 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 88 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:25,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 22 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:44:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20710 states. [2022-11-18 20:44:26,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20710 to 17239. [2022-11-18 20:44:26,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17239 states, 14641 states have (on average 3.41376955126016) internal successors, (49981), 17238 states have internal predecessors, (49981), 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) [2022-11-18 20:44:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17239 states to 17239 states and 49981 transitions. [2022-11-18 20:44:26,634 INFO L78 Accepts]: Start accepts. Automaton has 17239 states and 49981 transitions. Word has length 4 [2022-11-18 20:44:26,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:26,635 INFO L495 AbstractCegarLoop]: Abstraction has 17239 states and 49981 transitions. [2022-11-18 20:44:26,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2022-11-18 20:44:26,636 INFO L276 IsEmpty]: Start isEmpty. Operand 17239 states and 49981 transitions. [2022-11-18 20:44:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-18 20:44:26,640 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:26,640 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1] [2022-11-18 20:44:26,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:44:26,641 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-18 20:44:26,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:26,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1076332903, now seen corresponding path program 2 times [2022-11-18 20:44:26,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:26,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873295412] [2022-11-18 20:44:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:26,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:26,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:27,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:27,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:27,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873295412] [2022-11-18 20:44:27,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873295412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:44:27,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67884631] [2022-11-18 20:44:27,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:44:27,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:27,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:44:27,585 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:44:27,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:44:27,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:44:27,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:44:27,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-18 20:44:27,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:27,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:44:27,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:44:27,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:44:27,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:44:27,912 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:44:27,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:44:27,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:44:27,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:44:27,986 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:44:27,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:44:28,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:28,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:44:32,140 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:44:32,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-11-18 20:44:32,415 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:44:32,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 70 [2022-11-18 20:44:34,690 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:44:34,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 76 [2022-11-18 20:44:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:38,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67884631] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:44:38,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:44:38,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2022-11-18 20:44:38,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14185787] [2022-11-18 20:44:38,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:44:38,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:44:38,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:38,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:44:38,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:44:38,903 INFO L87 Difference]: Start difference. First operand 17239 states and 49981 transitions. Second operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2022-11-18 20:44:39,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:39,835 INFO L93 Difference]: Finished difference Result 17243 states and 49987 transitions. [2022-11-18 20:44:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:44:39,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) Word has length 5 [2022-11-18 20:44:39,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:39,907 INFO L225 Difference]: With dead ends: 17243 [2022-11-18 20:44:39,907 INFO L226 Difference]: Without dead ends: 17243 [2022-11-18 20:44:39,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:44:39,911 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:39,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 179 Invalid, 0 Unknown, 363 Unchecked, 0.3s Time] [2022-11-18 20:44:39,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17243 states. [2022-11-18 20:44:40,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17243 to 17243. [2022-11-18 20:44:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17243 states, 14645 states have (on average 3.413246841925572) internal successors, (49987), 17242 states have internal predecessors, (49987), 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) [2022-11-18 20:44:40,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17243 states to 17243 states and 49987 transitions. [2022-11-18 20:44:40,475 INFO L78 Accepts]: Start accepts. Automaton has 17243 states and 49987 transitions. Word has length 5 [2022-11-18 20:44:40,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:40,476 INFO L495 AbstractCegarLoop]: Abstraction has 17243 states and 49987 transitions. [2022-11-18 20:44:40,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2022-11-18 20:44:40,476 INFO L276 IsEmpty]: Start isEmpty. Operand 17243 states and 49987 transitions. [2022-11-18 20:44:40,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:44:40,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:40,477 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-18 20:44:40,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:44:40,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:40,678 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-18 20:44:40,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:40,678 INFO L85 PathProgramCache]: Analyzing trace with hash -731163521, now seen corresponding path program 1 times [2022-11-18 20:44:40,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:40,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787987711] [2022-11-18 20:44:40,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:40,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-18 20:44:40,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:40,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787987711] [2022-11-18 20:44:40,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787987711] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:44:40,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:44:40,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:44:40,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130678528] [2022-11-18 20:44:40,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:44:40,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:44:40,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:40,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:44:40,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:44:40,795 INFO L87 Difference]: Start difference. First operand 17243 states and 49987 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2022-11-18 20:44:41,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:41,142 INFO L93 Difference]: Finished difference Result 16385 states and 47513 transitions. [2022-11-18 20:44:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:44:41,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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 7 [2022-11-18 20:44:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:41,208 INFO L225 Difference]: With dead ends: 16385 [2022-11-18 20:44:41,209 INFO L226 Difference]: Without dead ends: 16385 [2022-11-18 20:44:41,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:44:41,210 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 83 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:41,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 22 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:44:41,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16385 states. [2022-11-18 20:44:41,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16385 to 16385. [2022-11-18 20:44:41,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16385 states, 14034 states have (on average 3.3855636311814163) internal successors, (47513), 16384 states have internal predecessors, (47513), 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) [2022-11-18 20:44:42,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16385 states to 16385 states and 47513 transitions. [2022-11-18 20:44:42,138 INFO L78 Accepts]: Start accepts. Automaton has 16385 states and 47513 transitions. Word has length 7 [2022-11-18 20:44:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:42,138 INFO L495 AbstractCegarLoop]: Abstraction has 16385 states and 47513 transitions. [2022-11-18 20:44:42,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2022-11-18 20:44:42,139 INFO L276 IsEmpty]: Start isEmpty. Operand 16385 states and 47513 transitions. [2022-11-18 20:44:42,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:44:42,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:42,140 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1] [2022-11-18 20:44:42,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:44:42,140 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-18 20:44:42,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:42,141 INFO L85 PathProgramCache]: Analyzing trace with hash -731163520, now seen corresponding path program 1 times [2022-11-18 20:44:42,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:42,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001467492] [2022-11-18 20:44:42,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:42,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:42,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:42,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001467492] [2022-11-18 20:44:42,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001467492] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:44:42,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45517675] [2022-11-18 20:44:42,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:42,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:42,321 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:44:42,322 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:44:42,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:44:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:42,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:44:42,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:42,538 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:42,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:44:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:42,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45517675] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:44:42,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:44:42,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-18 20:44:42,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574355150] [2022-11-18 20:44:42,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:44:42,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:44:42,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:42,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:44:42,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:44:42,613 INFO L87 Difference]: Start difference. First operand 16385 states and 47513 transitions. Second operand has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 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) [2022-11-18 20:44:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:44:43,047 INFO L93 Difference]: Finished difference Result 16390 states and 47516 transitions. [2022-11-18 20:44:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:44:43,048 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 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) Word has length 7 [2022-11-18 20:44:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:44:43,101 INFO L225 Difference]: With dead ends: 16390 [2022-11-18 20:44:43,101 INFO L226 Difference]: Without dead ends: 16390 [2022-11-18 20:44:43,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:44:43,102 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:44:43,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 57 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:44:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16390 states. [2022-11-18 20:44:43,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16390 to 16388. [2022-11-18 20:44:43,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16388 states, 14037 states have (on average 3.3850537864216) internal successors, (47516), 16387 states have internal predecessors, (47516), 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) [2022-11-18 20:44:43,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16388 states to 16388 states and 47516 transitions. [2022-11-18 20:44:43,660 INFO L78 Accepts]: Start accepts. Automaton has 16388 states and 47516 transitions. Word has length 7 [2022-11-18 20:44:43,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:44:43,660 INFO L495 AbstractCegarLoop]: Abstraction has 16388 states and 47516 transitions. [2022-11-18 20:44:43,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 12 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) [2022-11-18 20:44:43,660 INFO L276 IsEmpty]: Start isEmpty. Operand 16388 states and 47516 transitions. [2022-11-18 20:44:43,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:44:43,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:44:43,660 INFO L195 NwaCegarLoop]: trace histogram [7, 1, 1] [2022-11-18 20:44:43,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:44:43,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:44:43,861 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-18 20:44:43,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:44:43,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1728351847, now seen corresponding path program 3 times [2022-11-18 20:44:43,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:44:43,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735413663] [2022-11-18 20:44:43,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:44:43,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:44:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:44:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:46,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:44:46,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735413663] [2022-11-18 20:44:46,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735413663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:44:46,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257655998] [2022-11-18 20:44:46,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:44:46,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:44:46,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:44:46,003 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:44:46,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:44:50,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:44:50,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:44:50,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-18 20:44:51,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:44:51,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:44:51,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:44:51,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:44:51,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:44:51,151 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:44:51,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:44:51,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:44:51,220 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:44:51,236 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:44:51,236 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:44:51,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:44:51,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:44:51,314 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:44:51,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:44:51,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:44:51,380 INFO L321 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2022-11-18 20:44:51,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:44:51,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:44:51,477 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-18 20:44:51,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 26 [2022-11-18 20:44:51,493 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:44:51,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:44:51,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:44:51,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:44:51,591 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:44:51,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:44:51,644 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:51,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:44:53,797 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 20:44:53,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 20:44:53,922 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 20:44:53,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 20:44:54,078 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 20:44:54,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 20:44:54,441 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 20:44:54,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 20:44:54,650 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 20:44:54,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 20:44:56,751 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 20:44:56,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 20:44:56,965 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:44:56,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257655998] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:44:56,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:44:56,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2022-11-18 20:44:56,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784089186] [2022-11-18 20:44:56,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:44:56,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 20:44:56,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:44:56,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 20:44:56,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:44:56,967 INFO L87 Difference]: Start difference. First operand 16388 states and 47516 transitions. Second operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 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) [2022-11-18 20:45:10,502 WARN L233 SmtUtils]: Spent 12.67s on a formula simplification. DAG size of input: 141 DAG size of output: 82 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:45:25,041 WARN L233 SmtUtils]: Spent 12.33s on a formula simplification. DAG size of input: 115 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:45:39,680 WARN L233 SmtUtils]: Spent 10.45s on a formula simplification. DAG size of input: 90 DAG size of output: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:45:52,243 WARN L233 SmtUtils]: Spent 10.16s on a formula simplification. DAG size of input: 67 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:46:00,434 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 45 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:46:08,730 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 41 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:46:09,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:09,098 INFO L93 Difference]: Finished difference Result 16393 states and 47523 transitions. [2022-11-18 20:46:09,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:46:09,098 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 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 [2022-11-18 20:46:09,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:09,163 INFO L225 Difference]: With dead ends: 16393 [2022-11-18 20:46:09,163 INFO L226 Difference]: Without dead ends: 16393 [2022-11-18 20:46:09,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 76.6s TimeCoverageRelationStatistics Valid=343, Invalid=1133, Unknown=6, NotChecked=0, Total=1482 [2022-11-18 20:46:09,165 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 561 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:09,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 117 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 278 Invalid, 0 Unknown, 561 Unchecked, 0.5s Time] [2022-11-18 20:46:09,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16393 states. [2022-11-18 20:46:09,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16393 to 16393. [2022-11-18 20:46:09,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16393 states, 14042 states have (on average 3.3843469591226323) internal successors, (47523), 16392 states have internal predecessors, (47523), 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) [2022-11-18 20:46:09,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16393 states to 16393 states and 47523 transitions. [2022-11-18 20:46:09,628 INFO L78 Accepts]: Start accepts. Automaton has 16393 states and 47523 transitions. Word has length 9 [2022-11-18 20:46:09,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:09,628 INFO L495 AbstractCegarLoop]: Abstraction has 16393 states and 47523 transitions. [2022-11-18 20:46:09,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 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) [2022-11-18 20:46:09,628 INFO L276 IsEmpty]: Start isEmpty. Operand 16393 states and 47523 transitions. [2022-11-18 20:46:09,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:46:09,628 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:09,629 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1] [2022-11-18 20:46:09,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:09,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:09,829 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-18 20:46:09,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:09,830 INFO L85 PathProgramCache]: Analyzing trace with hash 500632576, now seen corresponding path program 2 times [2022-11-18 20:46:09,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:09,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153162566] [2022-11-18 20:46:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:09,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:10,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:10,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153162566] [2022-11-18 20:46:10,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153162566] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:10,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221065762] [2022-11-18 20:46:10,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:46:10,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:10,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:10,351 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:10,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:46:10,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:46:10,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:10,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:46:10,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:10,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:46:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-18 20:46:10,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:46:10,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221065762] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:46:10,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:46:10,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2022-11-18 20:46:10,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661333543] [2022-11-18 20:46:10,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:46:10,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:46:10,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:10,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:46:10,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:46:10,640 INFO L87 Difference]: Start difference. First operand 16393 states and 47523 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2022-11-18 20:46:11,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:11,003 INFO L93 Difference]: Finished difference Result 16166 states and 47066 transitions. [2022-11-18 20:46:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:46:11,003 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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 13 [2022-11-18 20:46:11,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:11,075 INFO L225 Difference]: With dead ends: 16166 [2022-11-18 20:46:11,075 INFO L226 Difference]: Without dead ends: 16166 [2022-11-18 20:46:11,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:46:11,077 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:11,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 32 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:46:11,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16166 states. [2022-11-18 20:46:11,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16166 to 16166. [2022-11-18 20:46:11,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16166 states, 13869 states have (on average 3.3936116518855) internal successors, (47066), 16165 states have internal predecessors, (47066), 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) [2022-11-18 20:46:11,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16166 states to 16166 states and 47066 transitions. [2022-11-18 20:46:11,518 INFO L78 Accepts]: Start accepts. Automaton has 16166 states and 47066 transitions. Word has length 13 [2022-11-18 20:46:11,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:11,518 INFO L495 AbstractCegarLoop]: Abstraction has 16166 states and 47066 transitions. [2022-11-18 20:46:11,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2022-11-18 20:46:11,519 INFO L276 IsEmpty]: Start isEmpty. Operand 16166 states and 47066 transitions. [2022-11-18 20:46:11,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 20:46:11,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:11,520 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-18 20:46:11,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:11,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:11,727 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-18 20:46:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:11,728 INFO L85 PathProgramCache]: Analyzing trace with hash -2075571336, now seen corresponding path program 1 times [2022-11-18 20:46:11,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:11,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147664462] [2022-11-18 20:46:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:11,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:12,249 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:12,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:12,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147664462] [2022-11-18 20:46:12,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147664462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:12,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598366143] [2022-11-18 20:46:12,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:12,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:12,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:12,253 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:12,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:46:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:12,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-18 20:46:12,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:12,675 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:12,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:12,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598366143] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:46:12,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:46:12,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-18 20:46:12,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727586803] [2022-11-18 20:46:12,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:46:12,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 20:46:12,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:46:12,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 20:46:12,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:46:12,912 INFO L87 Difference]: Start difference. First operand 16166 states and 47066 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 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) [2022-11-18 20:46:13,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:46:13,501 INFO L93 Difference]: Finished difference Result 16179 states and 47075 transitions. [2022-11-18 20:46:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:46:13,502 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 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 16 [2022-11-18 20:46:13,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:46:13,567 INFO L225 Difference]: With dead ends: 16179 [2022-11-18 20:46:13,568 INFO L226 Difference]: Without dead ends: 16179 [2022-11-18 20:46:13,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:46:13,569 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:46:13,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 76 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:46:13,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16179 states. [2022-11-18 20:46:13,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16179 to 16173. [2022-11-18 20:46:13,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16173 states, 13876 states have (on average 3.392548284808302) internal successors, (47075), 16172 states have internal predecessors, (47075), 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) [2022-11-18 20:46:14,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16173 states to 16173 states and 47075 transitions. [2022-11-18 20:46:14,012 INFO L78 Accepts]: Start accepts. Automaton has 16173 states and 47075 transitions. Word has length 16 [2022-11-18 20:46:14,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:46:14,012 INFO L495 AbstractCegarLoop]: Abstraction has 16173 states and 47075 transitions. [2022-11-18 20:46:14,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 24 states have internal predecessors, (30), 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) [2022-11-18 20:46:14,013 INFO L276 IsEmpty]: Start isEmpty. Operand 16173 states and 47075 transitions. [2022-11-18 20:46:14,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-18 20:46:14,013 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:46:14,013 INFO L195 NwaCegarLoop]: trace histogram [15, 1, 1] [2022-11-18 20:46:14,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:46:14,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:46:14,214 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-18 20:46:14,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:46:14,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1843337319, now seen corresponding path program 4 times [2022-11-18 20:46:14,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:46:14,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820351204] [2022-11-18 20:46:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:46:14,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:46:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:46:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:19,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:46:19,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820351204] [2022-11-18 20:46:19,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820351204] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:46:19,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914643355] [2022-11-18 20:46:19,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:46:19,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:46:19,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:46:19,811 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:46:19,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:46:20,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:46:20,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:46:20,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 154 conjunts are in the unsatisfiable core [2022-11-18 20:46:20,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:46:20,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:20,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:46:20,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:20,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:46:20,512 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:46:20,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:46:20,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:20,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:46:20,585 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:46:20,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:46:20,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:20,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:46:20,678 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:46:20,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:46:20,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:20,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:46:20,766 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:46:20,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:46:20,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:20,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:46:20,863 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:46:20,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:46:20,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:20,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:46:20,963 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:46:20,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:46:21,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:21,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:46:21,055 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:46:21,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:46:21,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:21,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:46:21,157 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:46:21,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:46:21,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:21,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:46:21,254 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:46:21,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:46:21,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:21,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:46:21,357 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:46:21,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:46:21,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:21,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:46:21,454 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:46:21,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:46:21,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:21,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:46:21,554 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:46:21,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:46:21,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:21,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:46:21,664 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:46:21,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:46:21,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:46:21,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-18 20:46:21,758 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 20:46:21,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 20:46:21,817 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:46:21,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:46:26,008 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:46:26,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-11-18 20:46:30,251 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:46:30,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 70 [2022-11-18 20:46:42,641 WARN L233 SmtUtils]: Spent 12.05s on a formula simplification. DAG size of input: 39 DAG size of output: 36 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:46:42,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:46:42,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 76 [2022-11-18 20:46:46,996 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:46:46,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 82 [2022-11-18 20:46:49,363 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:46:49,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 70 treesize of output 88 [2022-11-18 20:46:53,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:46:53,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 94 [2022-11-18 20:46:58,263 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:46:58,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 100 [2022-11-18 20:47:03,018 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:03,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 106 [2022-11-18 20:47:05,547 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:05,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 112 [2022-11-18 20:47:09,100 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:09,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 118 [2022-11-18 20:47:13,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:13,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 124 [2022-11-18 20:47:15,898 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:15,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 112 treesize of output 130 [2022-11-18 20:47:18,679 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:18,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 136 [2022-11-18 20:47:23,938 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:23,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 142 [2022-11-18 20:47:25,913 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:47:25,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 130 treesize of output 148 [2022-11-18 20:47:32,827 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:47:32,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914643355] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:47:32,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:47:32,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 48 [2022-11-18 20:47:32,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708261103] [2022-11-18 20:47:32,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:47:32,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 20:47:32,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:47:32,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 20:47:32,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=2036, Unknown=1, NotChecked=0, Total=2450 [2022-11-18 20:47:32,830 INFO L87 Difference]: Start difference. First operand 16173 states and 47075 transitions. Second operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:48:07,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:48:07,709 INFO L93 Difference]: Finished difference Result 16182 states and 47086 transitions. [2022-11-18 20:48:07,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 20:48:07,710 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-18 20:48:07,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:48:07,763 INFO L225 Difference]: With dead ends: 16182 [2022-11-18 20:48:07,763 INFO L226 Difference]: Without dead ends: 16182 [2022-11-18 20:48:07,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 96.1s TimeCoverageRelationStatistics Valid=1049, Invalid=3502, Unknown=5, NotChecked=0, Total=4556 [2022-11-18 20:48:07,765 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 1435 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 2782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1347 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:48:07,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 294 Invalid, 2782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1435 Invalid, 0 Unknown, 1347 Unchecked, 3.2s Time] [2022-11-18 20:48:07,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16182 states. [2022-11-18 20:48:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16182 to 16182. [2022-11-18 20:48:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16182 states, 13885 states have (on average 3.3911415196254953) internal successors, (47086), 16181 states have internal predecessors, (47086), 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) [2022-11-18 20:48:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16182 states to 16182 states and 47086 transitions. [2022-11-18 20:48:08,085 INFO L78 Accepts]: Start accepts. Automaton has 16182 states and 47086 transitions. Word has length 17 [2022-11-18 20:48:08,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:48:08,085 INFO L495 AbstractCegarLoop]: Abstraction has 16182 states and 47086 transitions. [2022-11-18 20:48:08,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:48:08,086 INFO L276 IsEmpty]: Start isEmpty. Operand 16182 states and 47086 transitions. [2022-11-18 20:48:08,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 20:48:08,087 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:48:08,087 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-11-18 20:48:08,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:48:08,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:48:08,294 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-18 20:48:08,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:48:08,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1450025864, now seen corresponding path program 2 times [2022-11-18 20:48:08,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:48:08,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778626425] [2022-11-18 20:48:08,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:48:08,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:48:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:48:09,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:48:09,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778626425] [2022-11-18 20:48:09,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778626425] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:48:09,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721869172] [2022-11-18 20:48:09,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:48:09,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:48:09,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:48:09,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:48:09,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:48:10,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 20:48:10,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:48:10,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-18 20:48:10,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:48:10,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-18 20:48:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-18 20:48:10,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:48:10,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721869172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:48:10,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:48:10,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [24] total 26 [2022-11-18 20:48:10,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305572633] [2022-11-18 20:48:10,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:48:10,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:48:10,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:48:10,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:48:10,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:48:10,062 INFO L87 Difference]: Start difference. First operand 16182 states and 47086 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2022-11-18 20:48:10,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:48:10,376 INFO L93 Difference]: Finished difference Result 15486 states and 44866 transitions. [2022-11-18 20:48:10,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:48:10,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 28 [2022-11-18 20:48:10,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:48:10,423 INFO L225 Difference]: With dead ends: 15486 [2022-11-18 20:48:10,424 INFO L226 Difference]: Without dead ends: 15486 [2022-11-18 20:48:10,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:48:10,424 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 88 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:48:10,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 36 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:48:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15486 states. [2022-11-18 20:48:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15486 to 15486. [2022-11-18 20:48:10,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15486 states, 13370 states have (on average 3.355721765145849) internal successors, (44866), 15485 states have internal predecessors, (44866), 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) [2022-11-18 20:48:10,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15486 states to 15486 states and 44866 transitions. [2022-11-18 20:48:10,709 INFO L78 Accepts]: Start accepts. Automaton has 15486 states and 44866 transitions. Word has length 28 [2022-11-18 20:48:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:48:10,709 INFO L495 AbstractCegarLoop]: Abstraction has 15486 states and 44866 transitions. [2022-11-18 20:48:10,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2022-11-18 20:48:10,710 INFO L276 IsEmpty]: Start isEmpty. Operand 15486 states and 44866 transitions. [2022-11-18 20:48:10,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 20:48:10,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:48:10,710 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-11-18 20:48:10,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:48:10,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 20:48:10,911 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-18 20:48:10,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:48:10,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1450025863, now seen corresponding path program 1 times [2022-11-18 20:48:10,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:48:10,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58547231] [2022-11-18 20:48:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:48:10,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:48:11,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-11-18 20:48:11,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:48:11,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58547231] [2022-11-18 20:48:11,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58547231] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:48:11,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:48:11,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:48:11,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830872295] [2022-11-18 20:48:11,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:48:11,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:48:11,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:48:11,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:48:11,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:48:11,308 INFO L87 Difference]: Start difference. First operand 15486 states and 44866 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2022-11-18 20:48:11,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:48:11,741 INFO L93 Difference]: Finished difference Result 19191 states and 55424 transitions. [2022-11-18 20:48:11,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:48:11,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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 28 [2022-11-18 20:48:11,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:48:11,818 INFO L225 Difference]: With dead ends: 19191 [2022-11-18 20:48:11,818 INFO L226 Difference]: Without dead ends: 19191 [2022-11-18 20:48:11,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:48:11,820 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 85 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:48:11,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 38 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:48:11,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19191 states. [2022-11-18 20:48:12,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19191 to 15355. [2022-11-18 20:48:12,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15355 states, 13382 states have (on average 3.3184875205499926) internal successors, (44408), 15354 states have internal predecessors, (44408), 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) [2022-11-18 20:48:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15355 states to 15355 states and 44408 transitions. [2022-11-18 20:48:12,198 INFO L78 Accepts]: Start accepts. Automaton has 15355 states and 44408 transitions. Word has length 28 [2022-11-18 20:48:12,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:48:12,199 INFO L495 AbstractCegarLoop]: Abstraction has 15355 states and 44408 transitions. [2022-11-18 20:48:12,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 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) [2022-11-18 20:48:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 15355 states and 44408 transitions. [2022-11-18 20:48:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-18 20:48:12,200 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:48:12,200 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-11-18 20:48:12,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 20:48:12,200 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-18 20:48:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:48:12,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1450025801, now seen corresponding path program 1 times [2022-11-18 20:48:12,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:48:12,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766908296] [2022-11-18 20:48:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:48:12,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:48:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:48:13,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:48:13,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766908296] [2022-11-18 20:48:13,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766908296] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:48:13,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219785019] [2022-11-18 20:48:13,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:48:13,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:48:13,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:48:13,411 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:48:13,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:48:14,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:14,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:48:14,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:48:14,487 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:48:14,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:48:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:48:15,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219785019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:48:15,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:48:15,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-11-18 20:48:15,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905596608] [2022-11-18 20:48:15,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:48:15,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-11-18 20:48:15,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:48:15,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-11-18 20:48:15,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 20:48:15,490 INFO L87 Difference]: Start difference. First operand 15355 states and 44408 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 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) [2022-11-18 20:48:16,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:48:16,388 INFO L93 Difference]: Finished difference Result 15384 states and 44429 transitions. [2022-11-18 20:48:16,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-18 20:48:16,389 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 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 28 [2022-11-18 20:48:16,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:48:16,429 INFO L225 Difference]: With dead ends: 15384 [2022-11-18 20:48:16,429 INFO L226 Difference]: Without dead ends: 15384 [2022-11-18 20:48:16,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-11-18 20:48:16,430 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 32 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:48:16,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 133 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-18 20:48:16,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15384 states. [2022-11-18 20:48:16,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15384 to 15370. [2022-11-18 20:48:16,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15370 states, 13397 states have (on average 3.316339478987833) internal successors, (44429), 15369 states have internal predecessors, (44429), 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) [2022-11-18 20:48:16,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15370 states to 15370 states and 44429 transitions. [2022-11-18 20:48:16,713 INFO L78 Accepts]: Start accepts. Automaton has 15370 states and 44429 transitions. Word has length 28 [2022-11-18 20:48:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:48:16,713 INFO L495 AbstractCegarLoop]: Abstraction has 15370 states and 44429 transitions. [2022-11-18 20:48:16,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 states have internal predecessors, (54), 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) [2022-11-18 20:48:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 15370 states and 44429 transitions. [2022-11-18 20:48:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-18 20:48:16,714 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:48:16,714 INFO L195 NwaCegarLoop]: trace histogram [31, 1, 1] [2022-11-18 20:48:16,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:48:16,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:48:16,919 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-18 20:48:16,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:48:16,919 INFO L85 PathProgramCache]: Analyzing trace with hash -2095698841, now seen corresponding path program 5 times [2022-11-18 20:48:16,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:48:16,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069608872] [2022-11-18 20:48:16,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:48:16,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:48:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:48:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:48:28,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:48:28,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069608872] [2022-11-18 20:48:28,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069608872] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:48:28,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49335047] [2022-11-18 20:48:28,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:48:28,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:48:28,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:48:28,165 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:48:28,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9bef2ec2-e554-41ef-ad21-0ff7af76daf3/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process