./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_safe-6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_safe-6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN --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 ca933e9c322081d61da01652cda9ceed61707699c680fd4ef3d92d3ccd39b362 --- 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-6b4ec56 [2022-11-20 10:58:18,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:58:18,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:58:18,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:58:18,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:58:18,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:58:18,906 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:58:18,910 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:58:18,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:58:18,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:58:18,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:58:18,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:58:18,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:58:18,918 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:58:18,919 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:58:18,921 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:58:18,923 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:58:18,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:58:18,930 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:58:18,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:58:18,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:58:18,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:58:18,950 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:58:18,951 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:58:18,955 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:58:18,960 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:58:18,961 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:58:18,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:58:18,963 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:58:18,964 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:58:18,965 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:58:18,966 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:58:18,968 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:58:18,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:58:18,971 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:58:18,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:58:18,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:58:18,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:58:18,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:58:18,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:58:18,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:58:18,977 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 10:58:19,015 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:58:19,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:58:19,021 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:58:19,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:58:19,022 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:58:19,022 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:58:19,023 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:58:19,024 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:58:19,024 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:58:19,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:58:19,026 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:58:19,026 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:58:19,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:58:19,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:58:19,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:58:19,027 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 10:58:19,028 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 10:58:19,028 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 10:58:19,028 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:58:19,029 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 10:58:19,029 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:58:19,029 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:58:19,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:58:19,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:58:19,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:58:19,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:58:19,031 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:58:19,031 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:58:19,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:58:19,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:58:19,032 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_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca933e9c322081d61da01652cda9ceed61707699c680fd4ef3d92d3ccd39b362 [2022-11-20 10:58:19,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:58:19,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:58:19,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:58:19,419 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:58:19,419 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:58:19,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread/fib_safe-6.i [2022-11-20 10:58:22,663 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:58:22,953 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:58:22,954 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/sv-benchmarks/c/pthread/fib_safe-6.i [2022-11-20 10:58:22,972 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/data/eb1f9610f/a40d05b94bd74146bcb61619c31089b6/FLAG46c5f990d [2022-11-20 10:58:23,011 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/data/eb1f9610f/a40d05b94bd74146bcb61619c31089b6 [2022-11-20 10:58:23,013 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:58:23,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:58:23,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:58:23,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:58:23,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:58:23,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:58:23" (1/1) ... [2022-11-20 10:58:23,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af42b09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:23, skipping insertion in model container [2022-11-20 10:58:23,024 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:58:23" (1/1) ... [2022-11-20 10:58:23,033 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:58:23,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:58:23,584 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/sv-benchmarks/c/pthread/fib_safe-6.i[30241,30254] [2022-11-20 10:58:23,622 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:58:23,640 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:58:23,705 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/sv-benchmarks/c/pthread/fib_safe-6.i[30241,30254] [2022-11-20 10:58:23,719 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:58:23,770 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:58:23,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:23 WrapperNode [2022-11-20 10:58:23,772 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:58:23,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:58:23,775 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:58:23,775 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:58:23,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:23" (1/1) ... [2022-11-20 10:58:23,827 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:23" (1/1) ... [2022-11-20 10:58:23,856 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-20 10:58:23,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:58:23,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:58:23,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:58:23,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:58:23,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:23" (1/1) ... [2022-11-20 10:58:23,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:23" (1/1) ... [2022-11-20 10:58:23,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:23" (1/1) ... [2022-11-20 10:58:23,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:23" (1/1) ... [2022-11-20 10:58:23,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:23" (1/1) ... [2022-11-20 10:58:23,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:23" (1/1) ... [2022-11-20 10:58:23,882 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:23" (1/1) ... [2022-11-20 10:58:23,883 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:23" (1/1) ... [2022-11-20 10:58:23,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:58:23,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:58:23,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:58:23,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:58:23,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:23" (1/1) ... [2022-11-20 10:58:23,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:58:23,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:58:23,928 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:58:23,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:58:23,986 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-20 10:58:23,987 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-20 10:58:23,987 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-20 10:58:23,987 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-20 10:58:23,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:58:23,988 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:58:23,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:58:23,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:58:23,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:58:23,990 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:58:23,990 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:58:23,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:58:23,990 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:58:23,992 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:58:24,231 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:58:24,233 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:58:24,440 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:58:24,449 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:58:24,449 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 10:58:24,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:58:24 BoogieIcfgContainer [2022-11-20 10:58:24,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:58:24,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:58:24,455 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:58:24,459 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:58:24,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:58:23" (1/3) ... [2022-11-20 10:58:24,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d467368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:58:24, skipping insertion in model container [2022-11-20 10:58:24,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:58:23" (2/3) ... [2022-11-20 10:58:24,465 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d467368 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:58:24, skipping insertion in model container [2022-11-20 10:58:24,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:58:24" (3/3) ... [2022-11-20 10:58:24,468 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-6.i [2022-11-20 10:58:24,491 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:58:24,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-20 10:58:24,492 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:58:24,560 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:58:24,602 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 10:58:24,619 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 109 transitions, 228 flow [2022-11-20 10:58:24,628 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 109 transitions, 228 flow [2022-11-20 10:58:24,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 228 flow [2022-11-20 10:58:24,725 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-11-20 10:58:24,726 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:58:24,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 107 events. 7/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-11-20 10:58:24,736 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2022-11-20 10:58:29,802 INFO L134 LiptonReduction]: Checked pairs total: 1738 [2022-11-20 10:58:29,802 INFO L136 LiptonReduction]: Total number of compositions: 114 [2022-11-20 10:58:29,811 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 52 flow [2022-11-20 10:58:29,830 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 52 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 51 states have internal predecessors, (136), 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) [2022-11-20 10:58:29,852 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:58:29,860 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;@213d13b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:58:29,861 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-20 10:58:29,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 51 states have internal predecessors, (136), 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) [2022-11-20 10:58:29,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-20 10:58:29,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:29,870 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-20 10:58:29,870 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:58:29,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash 419, now seen corresponding path program 1 times [2022-11-20 10:58:29,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:29,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982073899] [2022-11-20 10:58:29,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:29,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:30,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:30,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982073899] [2022-11-20 10:58:30,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982073899] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:58:30,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:58:30,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-20 10:58:30,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147041361] [2022-11-20 10:58:30,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:58:30,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:58:30,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:30,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:58:30,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:58:30,118 INFO L87 Difference]: Start difference. First operand has 52 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 51 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-20 10:58:30,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:30,185 INFO L93 Difference]: Finished difference Result 50 states and 134 transitions. [2022-11-20 10:58:30,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:58:30,188 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2022-11-20 10:58:30,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:30,203 INFO L225 Difference]: With dead ends: 50 [2022-11-20 10:58:30,204 INFO L226 Difference]: Without dead ends: 50 [2022-11-20 10:58:30,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:58:30,210 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:30,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:58:30,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-20 10:58:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-20 10:58:30,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 2.9130434782608696) internal successors, (134), 49 states have internal predecessors, (134), 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) [2022-11-20 10:58:30,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 134 transitions. [2022-11-20 10:58:30,270 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 134 transitions. Word has length 1 [2022-11-20 10:58:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:30,271 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 134 transitions. [2022-11-20 10:58:30,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-20 10:58:30,271 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 134 transitions. [2022-11-20 10:58:30,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 10:58:30,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:30,272 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 10:58:30,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:58:30,273 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:58:30,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:30,274 INFO L85 PathProgramCache]: Analyzing trace with hash 410526, now seen corresponding path program 1 times [2022-11-20 10:58:30,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:30,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968812780] [2022-11-20 10:58:30,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:30,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:30,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:30,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:30,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968812780] [2022-11-20 10:58:30,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968812780] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:58:30,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:58:30,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:58:30,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911047907] [2022-11-20 10:58:30,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:58:30,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:58:30,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:30,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:58:30,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:58:30,516 INFO L87 Difference]: Start difference. First operand 50 states and 134 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:30,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:30,568 INFO L93 Difference]: Finished difference Result 47 states and 128 transitions. [2022-11-20 10:58:30,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:58:30,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 10:58:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:30,570 INFO L225 Difference]: With dead ends: 47 [2022-11-20 10:58:30,570 INFO L226 Difference]: Without dead ends: 47 [2022-11-20 10:58:30,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:58:30,572 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:30,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:58:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-20 10:58:30,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-20 10:58:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 2.909090909090909) internal successors, (128), 46 states have internal predecessors, (128), 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) [2022-11-20 10:58:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 128 transitions. [2022-11-20 10:58:30,581 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 128 transitions. Word has length 3 [2022-11-20 10:58:30,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:30,581 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 128 transitions. [2022-11-20 10:58:30,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:30,582 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 128 transitions. [2022-11-20 10:58:30,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 10:58:30,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:30,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 10:58:30,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:58:30,583 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:58:30,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:30,584 INFO L85 PathProgramCache]: Analyzing trace with hash 410527, now seen corresponding path program 1 times [2022-11-20 10:58:30,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:30,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637414171] [2022-11-20 10:58:30,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:30,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:30,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:30,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637414171] [2022-11-20 10:58:30,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637414171] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:58:30,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:58:30,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:58:30,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440894242] [2022-11-20 10:58:30,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:58:30,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:58:30,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:30,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:58:30,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:58:30,755 INFO L87 Difference]: Start difference. First operand 47 states and 128 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:30,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:30,803 INFO L93 Difference]: Finished difference Result 44 states and 122 transitions. [2022-11-20 10:58:30,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:58:30,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-11-20 10:58:30,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:30,808 INFO L225 Difference]: With dead ends: 44 [2022-11-20 10:58:30,810 INFO L226 Difference]: Without dead ends: 44 [2022-11-20 10:58:30,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:58:30,815 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:30,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:58:30,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-20 10:58:30,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-20 10:58:30,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 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) [2022-11-20 10:58:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 122 transitions. [2022-11-20 10:58:30,834 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 122 transitions. Word has length 3 [2022-11-20 10:58:30,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:30,835 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 122 transitions. [2022-11-20 10:58:30,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:30,835 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 122 transitions. [2022-11-20 10:58:30,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:58:30,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:30,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:58:30,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:58:30,839 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:58:30,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:30,840 INFO L85 PathProgramCache]: Analyzing trace with hash -654675701, now seen corresponding path program 1 times [2022-11-20 10:58:30,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:30,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417154248] [2022-11-20 10:58:30,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:30,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:30,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:30,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:30,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:30,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417154248] [2022-11-20 10:58:30,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417154248] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:58:30,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:58:30,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:58:30,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138750255] [2022-11-20 10:58:30,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:58:30,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:58:30,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:30,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:58:30,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:58:30,984 INFO L87 Difference]: Start difference. First operand 44 states and 122 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:31,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:31,042 INFO L93 Difference]: Finished difference Result 53 states and 149 transitions. [2022-11-20 10:58:31,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:58:31,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-20 10:58:31,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:31,044 INFO L225 Difference]: With dead ends: 53 [2022-11-20 10:58:31,044 INFO L226 Difference]: Without dead ends: 53 [2022-11-20 10:58:31,045 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 [2022-11-20 10:58:31,050 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:31,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:58:31,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-20 10:58:31,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-20 10:58:31,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 51 states have (on average 2.9215686274509802) internal successors, (149), 52 states have internal predecessors, (149), 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) [2022-11-20 10:58:31,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 149 transitions. [2022-11-20 10:58:31,074 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 149 transitions. Word has length 6 [2022-11-20 10:58:31,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:31,075 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 149 transitions. [2022-11-20 10:58:31,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-20 10:58:31,077 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 149 transitions. [2022-11-20 10:58:31,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:58:31,078 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:31,078 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:31,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:58:31,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:58:31,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:31,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1179889916, now seen corresponding path program 1 times [2022-11-20 10:58:31,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:31,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534436075] [2022-11-20 10:58:31,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:31,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:31,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:31,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:31,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:31,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534436075] [2022-11-20 10:58:31,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534436075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:58:31,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521515287] [2022-11-20 10:58:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:31,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:31,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:58:31,204 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:58:31,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:58:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:31,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:58:31,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:31,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:31,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521515287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:31,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:58:31,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 10:58:31,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57340931] [2022-11-20 10:58:31,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:31,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:58:31,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:31,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:58:31,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:58:31,411 INFO L87 Difference]: Start difference. First operand 53 states and 149 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:31,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:31,533 INFO L93 Difference]: Finished difference Result 80 states and 230 transitions. [2022-11-20 10:58:31,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:58:31,533 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-20 10:58:31,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:31,535 INFO L225 Difference]: With dead ends: 80 [2022-11-20 10:58:31,535 INFO L226 Difference]: Without dead ends: 80 [2022-11-20 10:58:31,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:58:31,536 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:31,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:58:31,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-20 10:58:31,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-20 10:58:31,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 2.948717948717949) internal successors, (230), 79 states have internal predecessors, (230), 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) [2022-11-20 10:58:31,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 230 transitions. [2022-11-20 10:58:31,544 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 230 transitions. Word has length 7 [2022-11-20 10:58:31,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:31,545 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 230 transitions. [2022-11-20 10:58:31,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:31,545 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 230 transitions. [2022-11-20 10:58:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:58:31,546 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:31,546 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:31,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:31,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:31,754 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:58:31,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:31,754 INFO L85 PathProgramCache]: Analyzing trace with hash 88302923, now seen corresponding path program 2 times [2022-11-20 10:58:31,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:31,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200254894] [2022-11-20 10:58:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:31,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:31,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:31,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:31,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:31,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200254894] [2022-11-20 10:58:31,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200254894] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:58:31,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543009129] [2022-11-20 10:58:31,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:58:31,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:31,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:58:31,895 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:58:31,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:58:32,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:58:32,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:32,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:58:32,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:32,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:32,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:32,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543009129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:32,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:58:32,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-20 10:58:32,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446752021] [2022-11-20 10:58:32,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:32,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:58:32,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:32,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:58:32,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:58:32,108 INFO L87 Difference]: Start difference. First operand 80 states and 230 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:32,264 INFO L93 Difference]: Finished difference Result 134 states and 392 transitions. [2022-11-20 10:58:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:58:32,265 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:58:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:32,268 INFO L225 Difference]: With dead ends: 134 [2022-11-20 10:58:32,268 INFO L226 Difference]: Without dead ends: 134 [2022-11-20 10:58:32,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:58:32,270 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 222 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:32,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:58:32,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-20 10:58:32,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-20 10:58:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 132 states have (on average 2.9696969696969697) internal successors, (392), 133 states have internal predecessors, (392), 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) [2022-11-20 10:58:32,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 392 transitions. [2022-11-20 10:58:32,285 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 392 transitions. Word has length 10 [2022-11-20 10:58:32,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:32,285 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 392 transitions. [2022-11-20 10:58:32,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:32,285 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 392 transitions. [2022-11-20 10:58:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:58:32,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:32,291 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:32,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:32,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:32,497 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:58:32,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:32,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1112545195, now seen corresponding path program 3 times [2022-11-20 10:58:32,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:32,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682486845] [2022-11-20 10:58:32,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:32,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:32,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:32,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:32,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682486845] [2022-11-20 10:58:32,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682486845] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:58:32,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095280966] [2022-11-20 10:58:32,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:58:32,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:32,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:58:32,746 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:58:32,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:58:32,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 10:58:32,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:32,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:58:32,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:32,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:33,079 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:33,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095280966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:33,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:58:33,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 16 [2022-11-20 10:58:33,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857352527] [2022-11-20 10:58:33,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:33,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 10:58:33,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:33,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 10:58:33,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:58:33,082 INFO L87 Difference]: Start difference. First operand 134 states and 392 transitions. Second operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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) [2022-11-20 10:58:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:33,290 INFO L93 Difference]: Finished difference Result 170 states and 500 transitions. [2022-11-20 10:58:33,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 10:58:33,295 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:58:33,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:33,300 INFO L225 Difference]: With dead ends: 170 [2022-11-20 10:58:33,300 INFO L226 Difference]: Without dead ends: 170 [2022-11-20 10:58:33,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-20 10:58:33,302 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 174 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:33,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 0 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 10:58:33,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-11-20 10:58:33,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-11-20 10:58:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 168 states have (on average 2.9761904761904763) internal successors, (500), 169 states have internal predecessors, (500), 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) [2022-11-20 10:58:33,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 500 transitions. [2022-11-20 10:58:33,322 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 500 transitions. Word has length 16 [2022-11-20 10:58:33,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:33,322 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 500 transitions. [2022-11-20 10:58:33,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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) [2022-11-20 10:58:33,323 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 500 transitions. [2022-11-20 10:58:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 10:58:33,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:33,324 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:33,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:33,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:33,525 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:58:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash -400245781, now seen corresponding path program 4 times [2022-11-20 10:58:33,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:33,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588058513] [2022-11-20 10:58:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:33,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:34,923 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:34,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:34,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588058513] [2022-11-20 10:58:34,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588058513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:58:34,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595381274] [2022-11-20 10:58:34,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:58:34,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:58:34,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:58:34,931 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:58:34,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:58:35,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:58:35,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:58:35,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-20 10:58:35,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:58:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:35,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:58:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:58:36,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595381274] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:58:36,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:58:36,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2022-11-20 10:58:36,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860649146] [2022-11-20 10:58:36,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:58:36,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 10:58:36,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:36,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 10:58:36,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=1750, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 10:58:36,842 INFO L87 Difference]: Start difference. First operand 170 states and 500 transitions. Second operand has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 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) [2022-11-20 10:58:58,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:58,359 INFO L93 Difference]: Finished difference Result 11101 states and 32953 transitions. [2022-11-20 10:58:58,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-11-20 10:58:58,359 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 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 [2022-11-20 10:58:58,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:58,435 INFO L225 Difference]: With dead ends: 11101 [2022-11-20 10:58:58,435 INFO L226 Difference]: Without dead ends: 11101 [2022-11-20 10:58:58,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25232 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=11989, Invalid=44893, Unknown=0, NotChecked=0, Total=56882 [2022-11-20 10:58:58,448 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2346 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3331 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2346 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 3968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 3331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:58,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2346 Valid, 0 Invalid, 3968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 3331 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-11-20 10:58:58,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2022-11-20 10:58:58,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 8418. [2022-11-20 10:58:58,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8418 states, 8416 states have (on average 3.301093155893536) internal successors, (27782), 8417 states have internal predecessors, (27782), 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) [2022-11-20 10:58:59,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8418 states to 8418 states and 27782 transitions. [2022-11-20 10:58:59,009 INFO L78 Accepts]: Start accepts. Automaton has 8418 states and 27782 transitions. Word has length 20 [2022-11-20 10:58:59,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:58:59,010 INFO L495 AbstractCegarLoop]: Abstraction has 8418 states and 27782 transitions. [2022-11-20 10:58:59,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 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) [2022-11-20 10:58:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 8418 states and 27782 transitions. [2022-11-20 10:58:59,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-20 10:58:59,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:58:59,085 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2022-11-20 10:58:59,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:58:59,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-20 10:58:59,292 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:58:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:58:59,293 INFO L85 PathProgramCache]: Analyzing trace with hash -400245779, now seen corresponding path program 1 times [2022-11-20 10:58:59,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:58:59,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480966362] [2022-11-20 10:58:59,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:58:59,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:58:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:58:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-11-20 10:58:59,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:58:59,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480966362] [2022-11-20 10:58:59,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480966362] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:58:59,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:58:59,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:58:59,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296546367] [2022-11-20 10:58:59,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:58:59,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:58:59,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:58:59,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:58:59,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:58:59,688 INFO L87 Difference]: Start difference. First operand 8418 states and 27782 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:58:59,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:58:59,783 INFO L93 Difference]: Finished difference Result 8409 states and 26843 transitions. [2022-11-20 10:58:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:58:59,784 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-11-20 10:58:59,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:58:59,853 INFO L225 Difference]: With dead ends: 8409 [2022-11-20 10:58:59,853 INFO L226 Difference]: Without dead ends: 8393 [2022-11-20 10:58:59,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:58:59,855 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:58:59,856 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:58:59,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8393 states. [2022-11-20 10:59:00,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8393 to 8274. [2022-11-20 10:59:00,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8274 states, 8273 states have (on average 3.2244651275232683) internal successors, (26676), 8273 states have internal predecessors, (26676), 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) [2022-11-20 10:59:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8274 states to 8274 states and 26676 transitions. [2022-11-20 10:59:00,250 INFO L78 Accepts]: Start accepts. Automaton has 8274 states and 26676 transitions. Word has length 20 [2022-11-20 10:59:00,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:00,250 INFO L495 AbstractCegarLoop]: Abstraction has 8274 states and 26676 transitions. [2022-11-20 10:59:00,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:59:00,252 INFO L276 IsEmpty]: Start isEmpty. Operand 8274 states and 26676 transitions. [2022-11-20 10:59:00,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 10:59:00,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:00,278 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:00,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-20 10:59:00,279 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:59:00,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:00,373 INFO L85 PathProgramCache]: Analyzing trace with hash 931707389, now seen corresponding path program 1 times [2022-11-20 10:59:00,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:00,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492055330] [2022-11-20 10:59:00,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:00,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:01,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:01,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492055330] [2022-11-20 10:59:01,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492055330] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:01,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732863535] [2022-11-20 10:59:01,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:01,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:01,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:01,628 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:01,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:59:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:01,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 10:59:01,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:02,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:03,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732863535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:03,831 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:59:03,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-11-20 10:59:03,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4639932] [2022-11-20 10:59:03,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:03,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 10:59:03,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:03,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 10:59:03,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=2296, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 10:59:03,834 INFO L87 Difference]: Start difference. First operand 8274 states and 26676 transitions. Second operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 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) [2022-11-20 10:59:43,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:59:43,423 INFO L93 Difference]: Finished difference Result 146520 states and 473618 transitions. [2022-11-20 10:59:43,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 293 states. [2022-11-20 10:59:43,424 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 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 23 [2022-11-20 10:59:43,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:59:44,539 INFO L225 Difference]: With dead ends: 146520 [2022-11-20 10:59:44,539 INFO L226 Difference]: Without dead ends: 143075 [2022-11-20 10:59:44,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46308 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=28356, Invalid=77594, Unknown=0, NotChecked=0, Total=105950 [2022-11-20 10:59:44,717 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2427 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4386 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2427 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 4386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:59:44,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2427 Valid, 0 Invalid, 5083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 4386 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-20 10:59:45,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143075 states. [2022-11-20 10:59:49,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143075 to 67340. [2022-11-20 10:59:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67340 states, 67339 states have (on average 3.898558042144968) internal successors, (262525), 67339 states have internal predecessors, (262525), 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) [2022-11-20 10:59:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67340 states to 67340 states and 262525 transitions. [2022-11-20 10:59:50,526 INFO L78 Accepts]: Start accepts. Automaton has 67340 states and 262525 transitions. Word has length 23 [2022-11-20 10:59:50,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:59:50,526 INFO L495 AbstractCegarLoop]: Abstraction has 67340 states and 262525 transitions. [2022-11-20 10:59:50,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 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) [2022-11-20 10:59:50,527 INFO L276 IsEmpty]: Start isEmpty. Operand 67340 states and 262525 transitions. [2022-11-20 10:59:50,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-20 10:59:50,708 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:59:50,708 INFO L195 NwaCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:59:50,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-20 10:59:50,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-20 10:59:50,913 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:59:50,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:59:50,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1299291958, now seen corresponding path program 1 times [2022-11-20 10:59:50,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:59:50,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708373651] [2022-11-20 10:59:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:50,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:59:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:52,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:59:52,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708373651] [2022-11-20 10:59:52,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708373651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:59:52,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925174961] [2022-11-20 10:59:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:59:52,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:59:52,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:59:52,347 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:59:52,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:59:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:59:52,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-20 10:59:52,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:59:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 78 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:53,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:59:54,634 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:59:54,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925174961] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:59:54,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:59:54,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 51 [2022-11-20 10:59:54,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616687496] [2022-11-20 10:59:54,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:59:54,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 10:59:54,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:59:54,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 10:59:54,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=2296, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 10:59:54,637 INFO L87 Difference]: Start difference. First operand 67340 states and 262525 transitions. Second operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 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) [2022-11-20 11:00:34,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:00:34,670 INFO L93 Difference]: Finished difference Result 209685 states and 725799 transitions. [2022-11-20 11:00:34,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 293 states. [2022-11-20 11:00:34,671 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 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 23 [2022-11-20 11:00:34,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:00:35,888 INFO L225 Difference]: With dead ends: 209685 [2022-11-20 11:00:35,888 INFO L226 Difference]: Without dead ends: 206240 [2022-11-20 11:00:35,897 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 324 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45959 ImplicationChecksByTransitivity, 34.2s TimeCoverageRelationStatistics Valid=28356, Invalid=77594, Unknown=0, NotChecked=0, Total=105950 [2022-11-20 11:00:35,898 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2402 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4522 mSolverCounterSat, 800 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 800 IncrementalHoareTripleChecker+Valid, 4522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-20 11:00:35,898 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2402 Valid, 0 Invalid, 5322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [800 Valid, 4522 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-20 11:00:36,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206240 states. [2022-11-20 11:00:41,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206240 to 127632. [2022-11-20 11:00:42,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127632 states, 127631 states have (on average 3.9591321857542447) internal successors, (505308), 127631 states have internal predecessors, (505308), 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) [2022-11-20 11:00:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127632 states to 127632 states and 505308 transitions. [2022-11-20 11:00:43,420 INFO L78 Accepts]: Start accepts. Automaton has 127632 states and 505308 transitions. Word has length 23 [2022-11-20 11:00:43,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:00:43,420 INFO L495 AbstractCegarLoop]: Abstraction has 127632 states and 505308 transitions. [2022-11-20 11:00:43,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 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) [2022-11-20 11:00:43,421 INFO L276 IsEmpty]: Start isEmpty. Operand 127632 states and 505308 transitions. [2022-11-20 11:00:44,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:00:44,108 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:00:44,108 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:00:44,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 11:00:44,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:44,309 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 11:00:44,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:00:44,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2021890928, now seen corresponding path program 2 times [2022-11-20 11:00:44,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:00:44,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570138348] [2022-11-20 11:00:44,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:00:44,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:00:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:00:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:45,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:00:45,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570138348] [2022-11-20 11:00:45,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570138348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:00:45,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963134556] [2022-11-20 11:00:45,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:00:45,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:00:45,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:00:45,459 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:00:45,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 11:00:45,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:00:45,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:00:45,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-20 11:00:45,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:00:46,763 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 78 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:46,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:00:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:00:48,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963134556] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:00:48,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:00:48,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-11-20 11:00:48,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983994854] [2022-11-20 11:00:48,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:00:48,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 11:00:48,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:00:48,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 11:00:48,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=2577, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 11:00:48,175 INFO L87 Difference]: Start difference. First operand 127632 states and 505308 transitions. Second operand has 56 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 states have internal predecessors, (72), 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) [2022-11-20 11:01:31,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:01:31,086 INFO L93 Difference]: Finished difference Result 298884 states and 1125077 transitions. [2022-11-20 11:01:31,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 273 states. [2022-11-20 11:01:31,087 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 states have internal predecessors, (72), 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 24 [2022-11-20 11:01:31,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:01:33,372 INFO L225 Difference]: With dead ends: 298884 [2022-11-20 11:01:33,373 INFO L226 Difference]: Without dead ends: 297907 [2022-11-20 11:01:33,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38357 ImplicationChecksByTransitivity, 36.1s TimeCoverageRelationStatistics Valid=25965, Invalid=67977, Unknown=0, NotChecked=0, Total=93942 [2022-11-20 11:01:33,377 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2760 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4489 mSolverCounterSat, 849 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2760 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 4489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-11-20 11:01:33,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2760 Valid, 0 Invalid, 5338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 4489 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-11-20 11:01:33,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297907 states. [2022-11-20 11:01:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297907 to 226310. [2022-11-20 11:01:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226310 states, 226309 states have (on average 4.0685699640756665) internal successors, (920754), 226309 states have internal predecessors, (920754), 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) [2022-11-20 11:01:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226310 states to 226310 states and 920754 transitions. [2022-11-20 11:01:49,461 INFO L78 Accepts]: Start accepts. Automaton has 226310 states and 920754 transitions. Word has length 24 [2022-11-20 11:01:49,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 11:01:49,462 INFO L495 AbstractCegarLoop]: Abstraction has 226310 states and 920754 transitions. [2022-11-20 11:01:49,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 states have internal predecessors, (72), 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) [2022-11-20 11:01:49,462 INFO L276 IsEmpty]: Start isEmpty. Operand 226310 states and 920754 transitions. [2022-11-20 11:01:50,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 11:01:50,976 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 11:01:50,976 INFO L195 NwaCegarLoop]: trace histogram [14, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 11:01:50,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 11:01:51,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:51,182 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 11:01:51,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 11:01:51,183 INFO L85 PathProgramCache]: Analyzing trace with hash -398088462, now seen corresponding path program 2 times [2022-11-20 11:01:51,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 11:01:51,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923472806] [2022-11-20 11:01:51,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 11:01:51,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 11:01:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 11:01:52,290 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:52,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 11:01:52,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923472806] [2022-11-20 11:01:52,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923472806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 11:01:52,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917971653] [2022-11-20 11:01:52,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 11:01:52,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 11:01:52,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 11:01:52,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 11:01:52,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b28c6d6-fe02-4d50-a763-f9ddf3a38d65/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 11:01:52,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 11:01:52,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 11:01:52,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-20 11:01:52,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 11:01:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 78 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:53,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 11:01:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 11:01:54,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917971653] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 11:01:54,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 11:01:54,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 54 [2022-11-20 11:01:54,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023575361] [2022-11-20 11:01:54,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 11:01:54,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 11:01:54,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 11:01:54,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 11:01:54,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=2577, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 11:01:54,997 INFO L87 Difference]: Start difference. First operand 226310 states and 920754 transitions. Second operand has 56 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 states have internal predecessors, (72), 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) [2022-11-20 11:02:40,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 11:02:40,768 INFO L93 Difference]: Finished difference Result 397420 states and 1539870 transitions. [2022-11-20 11:02:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 273 states. [2022-11-20 11:02:40,769 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.309090909090909) internal successors, (72), 55 states have internal predecessors, (72), 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 24 [2022-11-20 11:02:40,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 11:02:43,240 INFO L225 Difference]: With dead ends: 397420 [2022-11-20 11:02:43,240 INFO L226 Difference]: Without dead ends: 396443 [2022-11-20 11:02:43,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38270 ImplicationChecksByTransitivity, 37.3s TimeCoverageRelationStatistics Valid=25965, Invalid=67977, Unknown=0, NotChecked=0, Total=93942 [2022-11-20 11:02:43,245 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 2343 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4499 mSolverCounterSat, 767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2343 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 5266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 4499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-11-20 11:02:43,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2343 Valid, 0 Invalid, 5266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [767 Valid, 4499 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-11-20 11:02:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396443 states.