./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/sanfoundry_24-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/sanfoundry_24-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8 --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 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa --- 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-e04fb08 [2022-11-16 10:55:19,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 10:55:19,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 10:55:19,867 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 10:55:19,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 10:55:19,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 10:55:19,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 10:55:19,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 10:55:19,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 10:55:19,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 10:55:19,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 10:55:19,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 10:55:19,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 10:55:19,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 10:55:19,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 10:55:19,885 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 10:55:19,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 10:55:19,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 10:55:19,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 10:55:19,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 10:55:19,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 10:55:19,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 10:55:19,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 10:55:19,908 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 10:55:19,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 10:55:19,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 10:55:19,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 10:55:19,912 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 10:55:19,913 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 10:55:19,914 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 10:55:19,914 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 10:55:19,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 10:55:19,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 10:55:19,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 10:55:19,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 10:55:19,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 10:55:19,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 10:55:19,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 10:55:19,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 10:55:19,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 10:55:19,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 10:55:19,931 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 10:55:19,973 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 10:55:19,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 10:55:19,974 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 10:55:19,974 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 10:55:19,975 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 10:55:19,975 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 10:55:19,976 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 10:55:19,976 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 10:55:19,976 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 10:55:19,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 10:55:19,977 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 10:55:19,978 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 10:55:19,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 10:55:19,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 10:55:19,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 10:55:19,978 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 10:55:19,979 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 10:55:19,979 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 10:55:19,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 10:55:19,979 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 10:55:19,979 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 10:55:19,979 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 10:55:19,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 10:55:19,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 10:55:19,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 10:55:19,980 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:55:19,980 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 10:55:19,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 10:55:19,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 10:55:19,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 10:55:19,986 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_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7e3ff0b77765ac98635f2070c186c57a6cae0bb79eb8bc9016d9d716e81867aa [2022-11-16 10:55:20,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 10:55:20,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 10:55:20,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 10:55:20,352 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 10:55:20,353 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 10:55:20,355 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2022-11-16 10:55:20,418 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/data/d9b5fee73/09710996ad5840e58fbaf44cfa33e343/FLAG1be0f5185 [2022-11-16 10:55:20,964 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 10:55:20,964 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/sv-benchmarks/c/array-examples/sanfoundry_24-2.i [2022-11-16 10:55:20,980 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/data/d9b5fee73/09710996ad5840e58fbaf44cfa33e343/FLAG1be0f5185 [2022-11-16 10:55:21,307 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/data/d9b5fee73/09710996ad5840e58fbaf44cfa33e343 [2022-11-16 10:55:21,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 10:55:21,312 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 10:55:21,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 10:55:21,314 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 10:55:21,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 10:55:21,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:55:21" (1/1) ... [2022-11-16 10:55:21,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c82727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:21, skipping insertion in model container [2022-11-16 10:55:21,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 10:55:21" (1/1) ... [2022-11-16 10:55:21,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 10:55:21,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 10:55:21,566 WARN L229 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_3bc18394-e4f6-4a72-b77f-db761304eadc/sv-benchmarks/c/array-examples/sanfoundry_24-2.i[808,821] [2022-11-16 10:55:21,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:55:21,597 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 10:55:21,610 WARN L229 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_3bc18394-e4f6-4a72-b77f-db761304eadc/sv-benchmarks/c/array-examples/sanfoundry_24-2.i[808,821] [2022-11-16 10:55:21,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 10:55:21,632 INFO L208 MainTranslator]: Completed translation [2022-11-16 10:55:21,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:21 WrapperNode [2022-11-16 10:55:21,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 10:55:21,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 10:55:21,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 10:55:21,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 10:55:21,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:21" (1/1) ... [2022-11-16 10:55:21,650 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:21" (1/1) ... [2022-11-16 10:55:21,670 INFO L138 Inliner]: procedures = 18, calls = 18, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 65 [2022-11-16 10:55:21,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 10:55:21,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 10:55:21,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 10:55:21,671 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 10:55:21,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:21" (1/1) ... [2022-11-16 10:55:21,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:21" (1/1) ... [2022-11-16 10:55:21,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:21" (1/1) ... [2022-11-16 10:55:21,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:21" (1/1) ... [2022-11-16 10:55:21,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:21" (1/1) ... [2022-11-16 10:55:21,693 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:21" (1/1) ... [2022-11-16 10:55:21,694 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:21" (1/1) ... [2022-11-16 10:55:21,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:21" (1/1) ... [2022-11-16 10:55:21,697 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 10:55:21,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 10:55:21,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 10:55:21,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 10:55:21,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:21" (1/1) ... [2022-11-16 10:55:21,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 10:55:21,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:21,745 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 10:55:21,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 10:55:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 10:55:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 10:55:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 10:55:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 10:55:21,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 10:55:21,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 10:55:21,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 10:55:21,810 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-16 10:55:21,810 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-16 10:55:21,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 10:55:21,893 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 10:55:21,895 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 10:55:22,152 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 10:55:22,158 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 10:55:22,158 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-16 10:55:22,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:55:22 BoogieIcfgContainer [2022-11-16 10:55:22,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 10:55:22,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 10:55:22,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 10:55:22,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 10:55:22,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 10:55:21" (1/3) ... [2022-11-16 10:55:22,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52aa386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:55:22, skipping insertion in model container [2022-11-16 10:55:22,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 10:55:21" (2/3) ... [2022-11-16 10:55:22,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52aa386 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 10:55:22, skipping insertion in model container [2022-11-16 10:55:22,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 10:55:22" (3/3) ... [2022-11-16 10:55:22,184 INFO L112 eAbstractionObserver]: Analyzing ICFG sanfoundry_24-2.i [2022-11-16 10:55:22,218 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 10:55:22,219 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2022-11-16 10:55:22,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 10:55:22,299 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;@7a8ab5e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 10:55:22,300 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-16 10:55:22,306 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 10:55:22,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 10:55:22,312 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:55:22,312 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 10:55:22,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 10:55:22,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:22,322 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-11-16 10:55:22,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:22,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705786682] [2022-11-16 10:55:22,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:22,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:22,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:22,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705786682] [2022-11-16 10:55:22,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705786682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:55:22,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:55:22,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 10:55:22,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985773797] [2022-11-16 10:55:22,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:55:22,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:55:22,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:22,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:55:22,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:55:22,651 INFO L87 Difference]: Start difference. First operand has 45 states, 29 states have (on average 1.7241379310344827) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.0) 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) [2022-11-16 10:55:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:55:22,737 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-11-16 10:55:22,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:55:22,741 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 [2022-11-16 10:55:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:55:22,750 INFO L225 Difference]: With dead ends: 40 [2022-11-16 10:55:22,750 INFO L226 Difference]: Without dead ends: 38 [2022-11-16 10:55:22,752 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 [2022-11-16 10:55:22,759 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 29 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 10:55:22,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 40 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 10:55:22,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-16 10:55:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-16 10:55:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 34 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 10:55:22,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-11-16 10:55:22,809 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 4 [2022-11-16 10:55:22,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:55:22,809 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-11-16 10:55:22,810 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) [2022-11-16 10:55:22,810 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-11-16 10:55:22,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 10:55:22,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:55:22,811 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 10:55:22,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 10:55:22,812 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 10:55:22,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:22,815 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-11-16 10:55:22,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:22,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47777624] [2022-11-16 10:55:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:22,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:23,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:23,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47777624] [2022-11-16 10:55:23,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47777624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:55:23,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:55:23,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 10:55:23,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480876416] [2022-11-16 10:55:23,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:55:23,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 10:55:23,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:23,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 10:55:23,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 10:55:23,036 INFO L87 Difference]: Start difference. First operand 38 states and 43 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) [2022-11-16 10:55:23,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:55:23,124 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-11-16 10:55:23,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 10:55:23,124 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 [2022-11-16 10:55:23,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:55:23,125 INFO L225 Difference]: With dead ends: 61 [2022-11-16 10:55:23,125 INFO L226 Difference]: Without dead ends: 61 [2022-11-16 10:55:23,126 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 [2022-11-16 10:55:23,127 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:55:23,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 47 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:55:23,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-16 10:55:23,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2022-11-16 10:55:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.4) internal successors, (56), 46 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 10:55:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-11-16 10:55:23,136 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 4 [2022-11-16 10:55:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:55:23,136 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-11-16 10:55:23,137 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) [2022-11-16 10:55:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-11-16 10:55:23,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 10:55:23,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:55:23,138 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:23,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 10:55:23,138 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 10:55:23,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:23,139 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-11-16 10:55:23,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:23,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240659964] [2022-11-16 10:55:23,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:23,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:23,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:23,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:23,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240659964] [2022-11-16 10:55:23,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240659964] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:23,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528948257] [2022-11-16 10:55:23,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:23,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:23,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:23,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:23,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 10:55:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:23,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:55:23,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:23,421 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 [2022-11-16 10:55:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:23,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:23,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528948257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:23,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:23,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-11-16 10:55:23,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593082162] [2022-11-16 10:55:23,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:23,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 10:55:23,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:23,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 10:55:23,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-16 10:55:23,664 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:55:24,014 INFO L93 Difference]: Finished difference Result 123 states and 156 transitions. [2022-11-16 10:55:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 10:55:24,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-16 10:55:24,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:55:24,017 INFO L225 Difference]: With dead ends: 123 [2022-11-16 10:55:24,017 INFO L226 Difference]: Without dead ends: 123 [2022-11-16 10:55:24,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-11-16 10:55:24,019 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 127 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:55:24,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 97 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 10:55:24,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-16 10:55:24,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2022-11-16 10:55:24,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 90 states have (on average 1.3) internal successors, (117), 94 states have internal predecessors, (117), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 10:55:24,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 133 transitions. [2022-11-16 10:55:24,034 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 133 transitions. Word has length 8 [2022-11-16 10:55:24,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:55:24,034 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 133 transitions. [2022-11-16 10:55:24,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 133 transitions. [2022-11-16 10:55:24,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-16 10:55:24,036 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:55:24,036 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:24,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-16 10:55:24,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:24,242 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 10:55:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1897655597, now seen corresponding path program 1 times [2022-11-16 10:55:24,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:24,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934570069] [2022-11-16 10:55:24,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:24,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:24,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:24,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:24,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934570069] [2022-11-16 10:55:24,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934570069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:55:24,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:55:24,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:55:24,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035066861] [2022-11-16 10:55:24,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:55:24,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:55:24,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:24,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:55:24,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:55:24,352 INFO L87 Difference]: Start difference. First operand 104 states and 133 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:24,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:55:24,383 INFO L93 Difference]: Finished difference Result 103 states and 132 transitions. [2022-11-16 10:55:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 10:55:24,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-16 10:55:24,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:55:24,385 INFO L225 Difference]: With dead ends: 103 [2022-11-16 10:55:24,385 INFO L226 Difference]: Without dead ends: 101 [2022-11-16 10:55:24,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:55:24,386 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 10:55:24,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 61 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 10:55:24,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-16 10:55:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-11-16 10:55:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 88 states have (on average 1.25) internal successors, (110), 91 states have internal predecessors, (110), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 10:55:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 126 transitions. [2022-11-16 10:55:24,396 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 126 transitions. Word has length 9 [2022-11-16 10:55:24,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:55:24,396 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 126 transitions. [2022-11-16 10:55:24,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:24,396 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 126 transitions. [2022-11-16 10:55:24,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-16 10:55:24,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:55:24,397 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:24,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 10:55:24,398 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 10:55:24,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:24,398 INFO L85 PathProgramCache]: Analyzing trace with hash -290279188, now seen corresponding path program 1 times [2022-11-16 10:55:24,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:24,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247984362] [2022-11-16 10:55:24,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:24,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:24,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:24,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:24,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247984362] [2022-11-16 10:55:24,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247984362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:55:24,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:55:24,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 10:55:24,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342132358] [2022-11-16 10:55:24,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:55:24,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 10:55:24,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:24,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 10:55:24,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:55:24,512 INFO L87 Difference]: Start difference. First operand 101 states and 126 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:24,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:55:24,597 INFO L93 Difference]: Finished difference Result 125 states and 153 transitions. [2022-11-16 10:55:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 10:55:24,597 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-16 10:55:24,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:55:24,603 INFO L225 Difference]: With dead ends: 125 [2022-11-16 10:55:24,604 INFO L226 Difference]: Without dead ends: 119 [2022-11-16 10:55:24,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-16 10:55:24,607 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:55:24,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 90 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:55:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-16 10:55:24,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 102. [2022-11-16 10:55:24,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 92 states have internal predecessors, (109), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 10:55:24,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2022-11-16 10:55:24,630 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 13 [2022-11-16 10:55:24,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:55:24,631 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2022-11-16 10:55:24,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:24,631 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2022-11-16 10:55:24,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-16 10:55:24,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:55:24,632 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:24,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 10:55:24,633 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 10:55:24,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:24,634 INFO L85 PathProgramCache]: Analyzing trace with hash -144029224, now seen corresponding path program 1 times [2022-11-16 10:55:24,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:24,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817168348] [2022-11-16 10:55:24,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:24,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:24,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 10:55:24,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:24,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817168348] [2022-11-16 10:55:24,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817168348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:55:24,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:55:24,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 10:55:24,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221045869] [2022-11-16 10:55:24,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:55:24,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 10:55:24,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:24,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 10:55:24,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:55:24,735 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:24,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:55:24,795 INFO L93 Difference]: Finished difference Result 117 states and 144 transitions. [2022-11-16 10:55:24,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 10:55:24,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-11-16 10:55:24,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:55:24,797 INFO L225 Difference]: With dead ends: 117 [2022-11-16 10:55:24,797 INFO L226 Difference]: Without dead ends: 117 [2022-11-16 10:55:24,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 10:55:24,798 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 53 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:55:24,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 41 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:55:24,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-16 10:55:24,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 102. [2022-11-16 10:55:24,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 92 states have internal predecessors, (109), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 10:55:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2022-11-16 10:55:24,806 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 14 [2022-11-16 10:55:24,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:55:24,807 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2022-11-16 10:55:24,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:24,807 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2022-11-16 10:55:24,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-16 10:55:24,808 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:55:24,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:24,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 10:55:24,808 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 10:55:24,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:24,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1116060617, now seen corresponding path program 1 times [2022-11-16 10:55:24,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:24,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62155060] [2022-11-16 10:55:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:24,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-16 10:55:25,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:25,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62155060] [2022-11-16 10:55:25,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62155060] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:55:25,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:55:25,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 10:55:25,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165880450] [2022-11-16 10:55:25,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:55:25,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 10:55:25,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:25,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 10:55:25,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 10:55:25,094 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:25,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:55:25,327 INFO L93 Difference]: Finished difference Result 168 states and 205 transitions. [2022-11-16 10:55:25,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 10:55:25,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-16 10:55:25,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:55:25,329 INFO L225 Difference]: With dead ends: 168 [2022-11-16 10:55:25,329 INFO L226 Difference]: Without dead ends: 168 [2022-11-16 10:55:25,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-16 10:55:25,331 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 30 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:55:25,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 243 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:55:25,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-16 10:55:25,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 106. [2022-11-16 10:55:25,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 95 states have internal predecessors, (112), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 10:55:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 128 transitions. [2022-11-16 10:55:25,341 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 128 transitions. Word has length 17 [2022-11-16 10:55:25,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:55:25,341 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 128 transitions. [2022-11-16 10:55:25,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:25,342 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 128 transitions. [2022-11-16 10:55:25,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-16 10:55:25,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:55:25,343 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:25,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 10:55:25,344 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 10:55:25,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:25,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1123657531, now seen corresponding path program 1 times [2022-11-16 10:55:25,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:25,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070331538] [2022-11-16 10:55:25,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:25,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-16 10:55:25,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:25,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070331538] [2022-11-16 10:55:25,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070331538] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:25,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160309047] [2022-11-16 10:55:25,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:25,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:25,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:25,462 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:25,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 10:55:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:25,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 10:55:25,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:25,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:25,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-11-16 10:55:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:25,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160309047] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:25,878 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:25,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2022-11-16 10:55:25,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460233929] [2022-11-16 10:55:25,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:25,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 10:55:25,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:25,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 10:55:25,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2022-11-16 10:55:25,880 INFO L87 Difference]: Start difference. First operand 106 states and 128 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:55:26,240 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2022-11-16 10:55:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 10:55:26,241 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-16 10:55:26,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:55:26,242 INFO L225 Difference]: With dead ends: 162 [2022-11-16 10:55:26,243 INFO L226 Difference]: Without dead ends: 162 [2022-11-16 10:55:26,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2022-11-16 10:55:26,244 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 449 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:55:26,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 128 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 10:55:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-16 10:55:26,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 103. [2022-11-16 10:55:26,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 92 states have internal predecessors, (109), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-16 10:55:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions. [2022-11-16 10:55:26,252 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 18 [2022-11-16 10:55:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:55:26,252 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 125 transitions. [2022-11-16 10:55:26,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:26,253 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions. [2022-11-16 10:55:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-16 10:55:26,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:55:26,254 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-11-16 10:55:26,274 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 10:55:26,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:26,463 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 10:55:26,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:26,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-11-16 10:55:26,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:26,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647088091] [2022-11-16 10:55:26,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:26,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:26,650 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:26,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:26,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647088091] [2022-11-16 10:55:26,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647088091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:26,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605824797] [2022-11-16 10:55:26,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:55:26,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:26,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:26,652 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:26,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 10:55:26,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 10:55:26,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:55:26,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-16 10:55:26,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:26,749 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 [2022-11-16 10:55:26,951 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:26,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:27,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605824797] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:27,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:27,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-11-16 10:55:27,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631981468] [2022-11-16 10:55:27,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:27,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-16 10:55:27,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:27,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 10:55:27,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-11-16 10:55:27,187 INFO L87 Difference]: Start difference. First operand 103 states and 125 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:28,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:55:28,190 INFO L93 Difference]: Finished difference Result 293 states and 366 transitions. [2022-11-16 10:55:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 10:55:28,190 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-16 10:55:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:55:28,192 INFO L225 Difference]: With dead ends: 293 [2022-11-16 10:55:28,192 INFO L226 Difference]: Without dead ends: 293 [2022-11-16 10:55:28,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2022-11-16 10:55:28,193 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 340 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 10:55:28,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 533 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 10:55:28,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-16 10:55:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 226. [2022-11-16 10:55:28,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 200 states have (on average 1.22) internal successors, (244), 203 states have internal predecessors, (244), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-16 10:55:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 284 transitions. [2022-11-16 10:55:28,209 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 284 transitions. Word has length 20 [2022-11-16 10:55:28,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:55:28,222 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 284 transitions. [2022-11-16 10:55:28,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.625) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 284 transitions. [2022-11-16 10:55:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-16 10:55:28,224 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:55:28,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 10:55:28,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 10:55:28,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:28,430 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 10:55:28,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:28,430 INFO L85 PathProgramCache]: Analyzing trace with hash -541087126, now seen corresponding path program 1 times [2022-11-16 10:55:28,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:28,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734815852] [2022-11-16 10:55:28,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:28,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:28,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 10:55:28,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:28,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734815852] [2022-11-16 10:55:28,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734815852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 10:55:28,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 10:55:28,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-16 10:55:28,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321003645] [2022-11-16 10:55:28,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 10:55:28,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 10:55:28,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:28,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 10:55:28,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 10:55:28,842 INFO L87 Difference]: Start difference. First operand 226 states and 284 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:29,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:55:29,000 INFO L93 Difference]: Finished difference Result 291 states and 358 transitions. [2022-11-16 10:55:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-16 10:55:29,001 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-16 10:55:29,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:55:29,003 INFO L225 Difference]: With dead ends: 291 [2022-11-16 10:55:29,003 INFO L226 Difference]: Without dead ends: 291 [2022-11-16 10:55:29,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-11-16 10:55:29,004 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 17 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 10:55:29,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 181 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 10:55:29,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-11-16 10:55:29,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 224. [2022-11-16 10:55:29,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 199 states have (on average 1.2160804020100502) internal successors, (242), 201 states have internal predecessors, (242), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-11-16 10:55:29,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 282 transitions. [2022-11-16 10:55:29,026 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 282 transitions. Word has length 23 [2022-11-16 10:55:29,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:55:29,027 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 282 transitions. [2022-11-16 10:55:29,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 10:55:29,027 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 282 transitions. [2022-11-16 10:55:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-16 10:55:29,032 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:55:29,032 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-16 10:55:29,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 10:55:29,032 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 10:55:29,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:29,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1157298733, now seen corresponding path program 2 times [2022-11-16 10:55:29,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:29,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438565688] [2022-11-16 10:55:29,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:29,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 10:55:29,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:29,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438565688] [2022-11-16 10:55:29,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438565688] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:29,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35865610] [2022-11-16 10:55:29,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 10:55:29,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:29,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:29,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:29,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 10:55:29,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 10:55:29,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:55:29,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-16 10:55:29,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 41 proven. 4 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 10:55:29,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:30,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-16 10:55:30,317 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-16 10:55:30,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35865610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:30,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:30,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2022-11-16 10:55:30,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896895982] [2022-11-16 10:55:30,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:30,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-16 10:55:30,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:30,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-16 10:55:30,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-11-16 10:55:30,321 INFO L87 Difference]: Start difference. First operand 224 states and 282 transitions. Second operand has 28 states, 27 states have (on average 3.037037037037037) internal successors, (82), 28 states have internal predecessors, (82), 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) [2022-11-16 10:55:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:55:31,422 INFO L93 Difference]: Finished difference Result 315 states and 398 transitions. [2022-11-16 10:55:31,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-16 10:55:31,423 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.037037037037037) internal successors, (82), 28 states have internal predecessors, (82), 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 42 [2022-11-16 10:55:31,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:55:31,426 INFO L225 Difference]: With dead ends: 315 [2022-11-16 10:55:31,426 INFO L226 Difference]: Without dead ends: 45 [2022-11-16 10:55:31,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=416, Invalid=1066, Unknown=0, NotChecked=0, Total=1482 [2022-11-16 10:55:31,429 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 997 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-16 10:55:31,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [997 Valid, 410 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-16 10:55:31,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-16 10:55:31,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-16 10:55:31,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 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) [2022-11-16 10:55:31,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-11-16 10:55:31,431 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2022-11-16 10:55:31,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:55:31,432 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-11-16 10:55:31,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.037037037037037) internal successors, (82), 28 states have internal predecessors, (82), 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) [2022-11-16 10:55:31,432 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-11-16 10:55:31,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-16 10:55:31,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:55:31,435 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1] [2022-11-16 10:55:31,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 10:55:31,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:31,641 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 10:55:31,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:31,641 INFO L85 PathProgramCache]: Analyzing trace with hash -256132636, now seen corresponding path program 3 times [2022-11-16 10:55:31,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:31,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585508779] [2022-11-16 10:55:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:31,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:32,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:32,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585508779] [2022-11-16 10:55:32,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585508779] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:32,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257179351] [2022-11-16 10:55:32,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 10:55:32,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:32,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:32,098 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:32,127 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 10:55:32,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-16 10:55:32,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:55:32,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-16 10:55:32,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:32,257 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 [2022-11-16 10:55:32,766 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:32,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:33,520 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:33,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257179351] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:33,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:33,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2022-11-16 10:55:33,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536534852] [2022-11-16 10:55:33,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:33,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-16 10:55:33,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:33,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-16 10:55:33,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=870, Unknown=0, NotChecked=0, Total=1190 [2022-11-16 10:55:33,527 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 35 states, 34 states have (on average 3.823529411764706) internal successors, (130), 35 states have internal predecessors, (130), 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) [2022-11-16 10:55:34,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:55:34,683 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2022-11-16 10:55:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-16 10:55:34,683 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.823529411764706) internal successors, (130), 35 states have internal predecessors, (130), 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 44 [2022-11-16 10:55:34,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:55:34,684 INFO L225 Difference]: With dead ends: 93 [2022-11-16 10:55:34,684 INFO L226 Difference]: Without dead ends: 93 [2022-11-16 10:55:34,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=670, Invalid=1310, Unknown=0, NotChecked=0, Total=1980 [2022-11-16 10:55:34,686 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 10:55:34,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 174 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 10:55:34,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-16 10:55:34,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-11-16 10:55:34,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 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) [2022-11-16 10:55:34,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-11-16 10:55:34,689 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 44 [2022-11-16 10:55:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:55:34,690 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-11-16 10:55:34,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.823529411764706) internal successors, (130), 35 states have internal predecessors, (130), 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) [2022-11-16 10:55:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-11-16 10:55:34,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-16 10:55:34,691 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:55:34,691 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1] [2022-11-16 10:55:34,704 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 10:55:34,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:34,899 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 10:55:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:34,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1667733768, now seen corresponding path program 4 times [2022-11-16 10:55:34,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:34,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630534207] [2022-11-16 10:55:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:34,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:36,230 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:36,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:36,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630534207] [2022-11-16 10:55:36,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630534207] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:36,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139504726] [2022-11-16 10:55:36,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 10:55:36,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:36,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:36,235 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:36,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 10:55:36,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 10:55:36,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:55:36,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-16 10:55:36,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:55:36,618 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 [2022-11-16 10:55:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:38,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:55:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 0 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:41,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139504726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:55:41,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:55:41,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 72 [2022-11-16 10:55:41,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500352641] [2022-11-16 10:55:41,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:55:41,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-16 10:55:41,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:55:41,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-16 10:55:41,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1274, Invalid=3982, Unknown=0, NotChecked=0, Total=5256 [2022-11-16 10:55:41,081 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 73 states, 72 states have (on average 3.8055555555555554) internal successors, (274), 73 states have internal predecessors, (274), 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) [2022-11-16 10:55:47,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:55:47,294 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2022-11-16 10:55:47,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-16 10:55:47,294 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 3.8055555555555554) internal successors, (274), 73 states have internal predecessors, (274), 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 92 [2022-11-16 10:55:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:55:47,297 INFO L225 Difference]: With dead ends: 189 [2022-11-16 10:55:47,297 INFO L226 Difference]: Without dead ends: 189 [2022-11-16 10:55:47,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=2837, Invalid=6093, Unknown=0, NotChecked=0, Total=8930 [2022-11-16 10:55:47,300 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 163 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 2519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-16 10:55:47,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 797 Invalid, 2519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-16 10:55:47,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-16 10:55:47,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-11-16 10:55:47,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0053191489361701) internal successors, (189), 188 states have internal predecessors, (189), 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) [2022-11-16 10:55:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2022-11-16 10:55:47,305 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 92 [2022-11-16 10:55:47,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:55:47,306 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2022-11-16 10:55:47,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 3.8055555555555554) internal successors, (274), 73 states have internal predecessors, (274), 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) [2022-11-16 10:55:47,306 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2022-11-16 10:55:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-11-16 10:55:47,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:55:47,308 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1] [2022-11-16 10:55:47,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 10:55:47,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 10:55:47,515 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 10:55:47,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:55:47,516 INFO L85 PathProgramCache]: Analyzing trace with hash -78753968, now seen corresponding path program 5 times [2022-11-16 10:55:47,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:55:47,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605735269] [2022-11-16 10:55:47,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:55:47,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:55:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:55:51,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:55:51,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:55:51,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605735269] [2022-11-16 10:55:51,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605735269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:55:51,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134836310] [2022-11-16 10:55:51,303 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 10:55:51,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:55:51,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:55:51,304 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:55:51,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 10:56:11,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-11-16 10:56:11,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 10:56:11,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 99 conjunts are in the unsatisfiable core [2022-11-16 10:56:11,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 10:56:11,363 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 [2022-11-16 10:56:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:56:15,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 10:56:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4232 backedges. 0 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:56:21,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134836310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 10:56:21,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 10:56:21,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 141 [2022-11-16 10:56:21,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958649377] [2022-11-16 10:56:21,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 10:56:21,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-11-16 10:56:21,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 10:56:21,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-11-16 10:56:21,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4698, Invalid=15324, Unknown=0, NotChecked=0, Total=20022 [2022-11-16 10:56:21,261 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand has 142 states, 141 states have (on average 3.9574468085106385) internal successors, (558), 142 states have internal predecessors, (558), 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) [2022-11-16 10:56:45,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 10:56:45,055 INFO L93 Difference]: Finished difference Result 381 states and 381 transitions. [2022-11-16 10:56:45,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-16 10:56:45,056 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 141 states have (on average 3.9574468085106385) internal successors, (558), 142 states have internal predecessors, (558), 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 188 [2022-11-16 10:56:45,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 10:56:45,058 INFO L225 Difference]: With dead ends: 381 [2022-11-16 10:56:45,058 INFO L226 Difference]: Without dead ends: 381 [2022-11-16 10:56:45,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10626 ImplicationChecksByTransitivity, 28.3s TimeCoverageRelationStatistics Valid=11230, Invalid=23926, Unknown=0, NotChecked=0, Total=35156 [2022-11-16 10:56:45,065 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 190 mSDsluCounter, 3358 mSDsCounter, 0 mSdLazyCounter, 10385 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 3408 SdHoareTripleChecker+Invalid, 10479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 10385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-16 10:56:45,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 3408 Invalid, 10479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 10385 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-16 10:56:45,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-11-16 10:56:45,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 381. [2022-11-16 10:56:45,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 380 states have (on average 1.0026315789473683) internal successors, (381), 380 states have internal predecessors, (381), 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) [2022-11-16 10:56:45,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 381 transitions. [2022-11-16 10:56:45,072 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 381 transitions. Word has length 188 [2022-11-16 10:56:45,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 10:56:45,073 INFO L495 AbstractCegarLoop]: Abstraction has 381 states and 381 transitions. [2022-11-16 10:56:45,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 141 states have (on average 3.9574468085106385) internal successors, (558), 142 states have internal predecessors, (558), 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) [2022-11-16 10:56:45,074 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 381 transitions. [2022-11-16 10:56:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2022-11-16 10:56:45,088 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 10:56:45,088 INFO L195 NwaCegarLoop]: trace histogram [95, 94, 94, 94, 1, 1, 1] [2022-11-16 10:56:45,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 10:56:45,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-16 10:56:45,304 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-16 10:56:45,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 10:56:45,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1796709344, now seen corresponding path program 6 times [2022-11-16 10:56:45,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 10:56:45,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312053338] [2022-11-16 10:56:45,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 10:56:45,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 10:56:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 10:56:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17672 backedges. 0 proven. 17672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 10:56:57,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 10:56:57,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312053338] [2022-11-16 10:56:57,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312053338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 10:56:57,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644064913] [2022-11-16 10:56:57,242 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 10:56:57,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 10:56:57,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 10:56:57,243 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 10:56:57,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3bc18394-e4f6-4a72-b77f-db761304eadc/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process