./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/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_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/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_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/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 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc --- 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 12:49:32,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 12:49:32,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 12:49:32,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 12:49:32,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 12:49:32,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 12:49:32,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 12:49:32,919 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 12:49:32,921 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 12:49:32,928 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 12:49:32,930 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 12:49:32,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 12:49:32,933 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 12:49:32,935 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 12:49:32,939 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 12:49:32,941 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 12:49:32,943 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 12:49:32,944 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 12:49:32,945 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 12:49:32,947 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 12:49:32,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 12:49:32,954 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 12:49:32,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 12:49:32,958 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 12:49:32,963 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 12:49:32,968 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 12:49:32,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 12:49:32,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 12:49:32,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 12:49:32,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 12:49:32,974 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 12:49:32,975 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 12:49:32,976 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 12:49:32,977 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 12:49:32,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 12:49:32,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 12:49:32,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 12:49:32,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 12:49:32,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 12:49:32,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 12:49:32,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 12:49:32,982 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 12:49:33,006 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 12:49:33,006 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 12:49:33,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 12:49:33,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 12:49:33,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 12:49:33,007 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 12:49:33,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 12:49:33,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 12:49:33,008 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 12:49:33,008 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 12:49:33,009 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 12:49:33,009 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 12:49:33,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 12:49:33,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 12:49:33,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 12:49:33,010 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 12:49:33,010 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 12:49:33,010 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 12:49:33,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 12:49:33,010 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 12:49:33,010 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 12:49:33,011 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 12:49:33,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 12:49:33,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 12:49:33,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 12:49:33,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:49:33,012 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 12:49:33,012 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 12:49:33,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 12:49:33,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 12:49:33,012 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_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc [2022-11-20 12:49:33,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 12:49:33,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 12:49:33,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 12:49:33,306 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 12:49:33,307 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 12:49:33,308 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2022-11-20 12:49:36,328 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 12:49:36,647 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 12:49:36,652 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2022-11-20 12:49:36,668 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/data/0f438f0c1/c5c25b88cf0e4f75a259f683b424f9f6/FLAGcb619b3a4 [2022-11-20 12:49:36,687 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/data/0f438f0c1/c5c25b88cf0e4f75a259f683b424f9f6 [2022-11-20 12:49:36,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 12:49:36,697 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 12:49:36,700 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 12:49:36,700 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 12:49:36,704 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 12:49:36,705 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:49:36" (1/1) ... [2022-11-20 12:49:36,706 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7365501a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:36, skipping insertion in model container [2022-11-20 12:49:36,706 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 12:49:36" (1/1) ... [2022-11-20 12:49:36,714 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 12:49:36,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 12:49:37,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:49:37,053 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 12:49:37,111 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 12:49:37,144 INFO L208 MainTranslator]: Completed translation [2022-11-20 12:49:37,146 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:37 WrapperNode [2022-11-20 12:49:37,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 12:49:37,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 12:49:37,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 12:49:37,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 12:49:37,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:37" (1/1) ... [2022-11-20 12:49:37,182 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:37" (1/1) ... [2022-11-20 12:49:37,212 INFO L138 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 62 [2022-11-20 12:49:37,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 12:49:37,214 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 12:49:37,214 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 12:49:37,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 12:49:37,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:37" (1/1) ... [2022-11-20 12:49:37,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:37" (1/1) ... [2022-11-20 12:49:37,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:37" (1/1) ... [2022-11-20 12:49:37,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:37" (1/1) ... [2022-11-20 12:49:37,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:37" (1/1) ... [2022-11-20 12:49:37,261 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:37" (1/1) ... [2022-11-20 12:49:37,262 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:37" (1/1) ... [2022-11-20 12:49:37,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:37" (1/1) ... [2022-11-20 12:49:37,270 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 12:49:37,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 12:49:37,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 12:49:37,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 12:49:37,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:37" (1/1) ... [2022-11-20 12:49:37,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 12:49:37,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:37,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 12:49:37,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 12:49:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 12:49:37,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 12:49:37,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 12:49:37,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 12:49:37,361 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 12:49:37,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 12:49:37,465 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 12:49:37,467 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 12:49:37,674 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 12:49:37,693 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 12:49:37,693 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 12:49:37,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:49:37 BoogieIcfgContainer [2022-11-20 12:49:37,697 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 12:49:37,699 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 12:49:37,699 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 12:49:37,703 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 12:49:37,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 12:49:36" (1/3) ... [2022-11-20 12:49:37,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461fc0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:49:37, skipping insertion in model container [2022-11-20 12:49:37,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 12:49:37" (2/3) ... [2022-11-20 12:49:37,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461fc0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 12:49:37, skipping insertion in model container [2022-11-20 12:49:37,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 12:49:37" (3/3) ... [2022-11-20 12:49:37,724 INFO L112 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2022-11-20 12:49:37,748 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 12:49:37,749 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2022-11-20 12:49:37,805 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 12:49:37,811 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;@36d20245, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 12:49:37,812 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-20 12:49:37,816 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 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 12:49:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 12:49:37,823 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:37,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 12:49:37,824 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:37,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:37,830 INFO L85 PathProgramCache]: Analyzing trace with hash 889508873, now seen corresponding path program 1 times [2022-11-20 12:49:37,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:37,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341805328] [2022-11-20 12:49:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:37,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:38,193 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 12:49:38,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:38,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341805328] [2022-11-20 12:49:38,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341805328] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:49:38,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:49:38,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:49:38,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600837432] [2022-11-20 12:49:38,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:49:38,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:49:38,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:49:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:49:38,236 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 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 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 12:49:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:38,311 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-11-20 12:49:38,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:49:38,314 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 12:49:38,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:38,345 INFO L225 Difference]: With dead ends: 58 [2022-11-20 12:49:38,345 INFO L226 Difference]: Without dead ends: 54 [2022-11-20 12:49:38,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:49:38,350 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:38,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 60 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:49:38,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-20 12:49:38,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 33. [2022-11-20 12:49:38,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 32 states have internal predecessors, (36), 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 12:49:38,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-11-20 12:49:38,379 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 6 [2022-11-20 12:49:38,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:38,379 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-11-20 12:49:38,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 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 12:49:38,380 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-11-20 12:49:38,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 12:49:38,380 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:38,380 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 12:49:38,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 12:49:38,381 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:38,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:38,382 INFO L85 PathProgramCache]: Analyzing trace with hash 889508820, now seen corresponding path program 1 times [2022-11-20 12:49:38,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:38,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503424878] [2022-11-20 12:49:38,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:38,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:38,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:38,456 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 12:49:38,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:38,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503424878] [2022-11-20 12:49:38,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503424878] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:49:38,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:49:38,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 12:49:38,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73710492] [2022-11-20 12:49:38,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:49:38,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 12:49:38,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:38,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 12:49:38,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 12:49:38,459 INFO L87 Difference]: Start difference. First operand 33 states and 36 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 12:49:38,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:38,488 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-11-20 12:49:38,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 12:49:38,489 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 12:49:38,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:38,490 INFO L225 Difference]: With dead ends: 31 [2022-11-20 12:49:38,490 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 12:49:38,490 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 12:49:38,492 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:38,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:49:38,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 12:49:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-20 12:49:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 30 states have internal predecessors, (34), 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 12:49:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-11-20 12:49:38,496 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 6 [2022-11-20 12:49:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:38,497 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-11-20 12:49:38,497 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 12:49:38,497 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-11-20 12:49:38,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 12:49:38,498 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:38,498 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 12:49:38,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 12:49:38,498 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:38,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:38,499 INFO L85 PathProgramCache]: Analyzing trace with hash 889508821, now seen corresponding path program 1 times [2022-11-20 12:49:38,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:38,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925581939] [2022-11-20 12:49:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:38,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:38,721 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 12:49:38,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:38,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925581939] [2022-11-20 12:49:38,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925581939] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:49:38,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:49:38,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:49:38,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450601419] [2022-11-20 12:49:38,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:49:38,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:49:38,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:38,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:49:38,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:49:38,724 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 12:49:38,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:38,818 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-11-20 12:49:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:49:38,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 12:49:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:38,821 INFO L225 Difference]: With dead ends: 50 [2022-11-20 12:49:38,821 INFO L226 Difference]: Without dead ends: 50 [2022-11-20 12:49:38,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:49:38,822 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:38,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:49:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-20 12:49:38,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 32. [2022-11-20 12:49:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 31 states have internal predecessors, (35), 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 12:49:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-11-20 12:49:38,828 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 6 [2022-11-20 12:49:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:38,828 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-11-20 12:49:38,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 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 12:49:38,828 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-11-20 12:49:38,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 12:49:38,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:38,829 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 12:49:38,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 12:49:38,830 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:38,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:38,830 INFO L85 PathProgramCache]: Analyzing trace with hash 889568456, now seen corresponding path program 1 times [2022-11-20 12:49:38,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:38,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375178306] [2022-11-20 12:49:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:38,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:38,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:39,034 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 12:49:39,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:39,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375178306] [2022-11-20 12:49:39,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375178306] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:49:39,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:49:39,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:49:39,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060071496] [2022-11-20 12:49:39,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:49:39,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:49:39,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:39,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:49:39,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:49:39,037 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 12:49:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:39,128 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-11-20 12:49:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:49:39,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 12:49:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:39,130 INFO L225 Difference]: With dead ends: 56 [2022-11-20 12:49:39,130 INFO L226 Difference]: Without dead ends: 56 [2022-11-20 12:49:39,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:49:39,131 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 81 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:39,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 44 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:49:39,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-20 12:49:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 34. [2022-11-20 12:49:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.52) internal successors, (38), 33 states have internal predecessors, (38), 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 12:49:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-11-20 12:49:39,136 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2022-11-20 12:49:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:39,137 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-11-20 12:49:39,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 12:49:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-11-20 12:49:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 12:49:39,137 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:39,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 12:49:39,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 12:49:39,138 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:39,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:39,139 INFO L85 PathProgramCache]: Analyzing trace with hash 889568403, now seen corresponding path program 1 times [2022-11-20 12:49:39,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:39,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807358433] [2022-11-20 12:49:39,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:39,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:39,361 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 12:49:39,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:39,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807358433] [2022-11-20 12:49:39,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807358433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:49:39,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:49:39,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-20 12:49:39,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150947557] [2022-11-20 12:49:39,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:49:39,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:49:39,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:39,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:49:39,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:49:39,365 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 12:49:39,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:39,441 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2022-11-20 12:49:39,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:49:39,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 12:49:39,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:39,447 INFO L225 Difference]: With dead ends: 55 [2022-11-20 12:49:39,447 INFO L226 Difference]: Without dead ends: 55 [2022-11-20 12:49:39,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:49:39,454 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 97 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:39,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 33 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:49:39,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-20 12:49:39,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 34. [2022-11-20 12:49:39,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.52) internal successors, (38), 33 states have internal predecessors, (38), 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 12:49:39,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-11-20 12:49:39,471 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 6 [2022-11-20 12:49:39,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:39,471 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-11-20 12:49:39,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 12:49:39,471 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-11-20 12:49:39,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 12:49:39,472 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:39,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:39,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 12:49:39,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:39,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:39,473 INFO L85 PathProgramCache]: Analyzing trace with hash 119484121, now seen corresponding path program 1 times [2022-11-20 12:49:39,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:39,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528418777] [2022-11-20 12:49:39,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:39,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:39,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:39,544 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 12:49:39,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:39,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528418777] [2022-11-20 12:49:39,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528418777] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:49:39,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:49:39,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:49:39,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982017574] [2022-11-20 12:49:39,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:49:39,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:49:39,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:39,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:49:39,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:49:39,549 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 12:49:39,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:39,592 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-11-20 12:49:39,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:49:39,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 12:49:39,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:39,595 INFO L225 Difference]: With dead ends: 31 [2022-11-20 12:49:39,595 INFO L226 Difference]: Without dead ends: 31 [2022-11-20 12:49:39,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-20 12:49:39,600 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:39,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 24 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:49:39,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-20 12:49:39,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-20 12:49:39,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.4) internal successors, (35), 30 states have internal predecessors, (35), 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 12:49:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-11-20 12:49:39,614 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 8 [2022-11-20 12:49:39,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:39,614 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-11-20 12:49:39,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 12:49:39,615 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-11-20 12:49:39,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-20 12:49:39,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:39,616 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:39,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-20 12:49:39,616 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:39,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:39,617 INFO L85 PathProgramCache]: Analyzing trace with hash 119484122, now seen corresponding path program 1 times [2022-11-20 12:49:39,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:39,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365961809] [2022-11-20 12:49:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:39,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:39,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:39,863 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 12:49:39,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:39,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365961809] [2022-11-20 12:49:39,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365961809] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:49:39,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:49:39,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-20 12:49:39,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542989202] [2022-11-20 12:49:39,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:49:39,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-20 12:49:39,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:39,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-20 12:49:39,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-20 12:49:39,865 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 12:49:39,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:39,963 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-11-20 12:49:39,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 12:49:39,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-20 12:49:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:39,964 INFO L225 Difference]: With dead ends: 42 [2022-11-20 12:49:39,964 INFO L226 Difference]: Without dead ends: 42 [2022-11-20 12:49:39,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:49:39,965 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 117 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:39,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 32 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:49:39,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-20 12:49:39,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-11-20 12:49:39,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.4) internal successors, (42), 35 states have internal predecessors, (42), 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 12:49:39,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-20 12:49:39,968 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 8 [2022-11-20 12:49:39,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:39,968 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-20 12:49:39,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 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 12:49:39,969 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-20 12:49:39,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 12:49:39,969 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:39,969 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:39,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 12:49:39,970 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:39,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:39,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556789, now seen corresponding path program 1 times [2022-11-20 12:49:39,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:39,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286876111] [2022-11-20 12:49:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:39,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:40,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:40,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:40,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286876111] [2022-11-20 12:49:40,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286876111] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:40,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488780035] [2022-11-20 12:49:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:40,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:40,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:40,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:40,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 12:49:40,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:40,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-20 12:49:40,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:40,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 12:49:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:40,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:41,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:41,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488780035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:41,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:41,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-11-20 12:49:41,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233808416] [2022-11-20 12:49:41,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:41,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 12:49:41,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:41,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 12:49:41,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:49:41,016 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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 12:49:41,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:41,354 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-11-20 12:49:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:49:41,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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 12:49:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:41,355 INFO L225 Difference]: With dead ends: 80 [2022-11-20 12:49:41,355 INFO L226 Difference]: Without dead ends: 80 [2022-11-20 12:49:41,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2022-11-20 12:49:41,356 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 208 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:41,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 113 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:49:41,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-20 12:49:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 34. [2022-11-20 12:49:41,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 33 states have internal predecessors, (40), 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 12:49:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-11-20 12:49:41,359 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 10 [2022-11-20 12:49:41,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:41,360 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-11-20 12:49:41,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 17 states have internal predecessors, (28), 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 12:49:41,360 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-11-20 12:49:41,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 12:49:41,360 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:41,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:41,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 12:49:41,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:41,563 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:41,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:41,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1900556842, now seen corresponding path program 1 times [2022-11-20 12:49:41,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:41,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86657038] [2022-11-20 12:49:41,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:41,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:41,846 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 12:49:41,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:41,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86657038] [2022-11-20 12:49:41,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86657038] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:41,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559993205] [2022-11-20 12:49:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:41,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:41,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:41,849 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:41,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 12:49:41,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:41,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-20 12:49:41,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:41,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 12:49:42,062 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 12:49:42,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:42,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559993205] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:42,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-20 12:49:42,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 12 [2022-11-20 12:49:42,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866143705] [2022-11-20 12:49:42,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:49:42,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-20 12:49:42,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:42,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-20 12:49:42,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-11-20 12:49:42,179 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:49:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:42,242 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2022-11-20 12:49:42,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-20 12:49:42,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 12:49:42,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:42,243 INFO L225 Difference]: With dead ends: 33 [2022-11-20 12:49:42,243 INFO L226 Difference]: Without dead ends: 33 [2022-11-20 12:49:42,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-11-20 12:49:42,246 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 61 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:42,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 15 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:49:42,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-20 12:49:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-11-20 12:49:42,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 30 states have internal predecessors, (36), 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 12:49:42,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-20 12:49:42,253 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 10 [2022-11-20 12:49:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:42,254 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-20 12:49:42,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:49:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-20 12:49:42,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-20 12:49:42,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:42,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:42,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:42,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-20 12:49:42,461 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:42,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:42,461 INFO L85 PathProgramCache]: Analyzing trace with hash -204531026, now seen corresponding path program 1 times [2022-11-20 12:49:42,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:42,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669800113] [2022-11-20 12:49:42,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:42,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:42,581 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 12:49:42,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:42,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669800113] [2022-11-20 12:49:42,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669800113] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:49:42,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:49:42,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-20 12:49:42,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116491419] [2022-11-20 12:49:42,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:49:42,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-20 12:49:42,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:42,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-20 12:49:42,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:49:42,584 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 12:49:42,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:42,601 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-11-20 12:49:42,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-20 12:49:42,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 12 [2022-11-20 12:49:42,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:42,602 INFO L225 Difference]: With dead ends: 30 [2022-11-20 12:49:42,603 INFO L226 Difference]: Without dead ends: 27 [2022-11-20 12:49:42,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-20 12:49:42,604 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:42,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 36 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:49:42,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-20 12:49:42,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-20 12:49:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 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 12:49:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-11-20 12:49:42,610 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 12 [2022-11-20 12:49:42,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:42,611 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-11-20 12:49:42,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 12:49:42,611 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-11-20 12:49:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 12:49:42,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:42,612 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:42,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 12:49:42,612 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:42,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:42,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2044161814, now seen corresponding path program 1 times [2022-11-20 12:49:42,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:42,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124698263] [2022-11-20 12:49:42,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:42,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:42,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:42,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:42,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:42,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124698263] [2022-11-20 12:49:42,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124698263] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:49:42,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:49:42,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 12:49:42,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804493964] [2022-11-20 12:49:42,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:49:42,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 12:49:42,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:42,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 12:49:42,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 12:49:42,822 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:49:42,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:42,905 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-11-20 12:49:42,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-20 12:49:42,906 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 12:49:42,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:42,907 INFO L225 Difference]: With dead ends: 31 [2022-11-20 12:49:42,907 INFO L226 Difference]: Without dead ends: 25 [2022-11-20 12:49:42,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-20 12:49:42,908 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:42,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 90 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 12:49:42,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-20 12:49:42,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-11-20 12:49:42,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 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 12:49:42,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-11-20 12:49:42,911 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2022-11-20 12:49:42,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:42,912 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-11-20 12:49:42,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:49:42,913 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-11-20 12:49:42,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 12:49:42,913 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:42,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:42,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-20 12:49:42,914 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:42,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:42,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1343097236, now seen corresponding path program 1 times [2022-11-20 12:49:42,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:42,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724841908] [2022-11-20 12:49:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:42,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:43,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:43,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:43,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724841908] [2022-11-20 12:49:43,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724841908] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 12:49:43,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 12:49:43,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-20 12:49:43,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482933313] [2022-11-20 12:49:43,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 12:49:43,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 12:49:43,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:43,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 12:49:43,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-20 12:49:43,166 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:49:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:43,277 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-11-20 12:49:43,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-20 12:49:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 12:49:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:43,278 INFO L225 Difference]: With dead ends: 33 [2022-11-20 12:49:43,278 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 12:49:43,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-11-20 12:49:43,279 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:43,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 73 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:49:43,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 12:49:43,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-11-20 12:49:43,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 25 states have internal predecessors, (29), 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 12:49:43,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-20 12:49:43,283 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 13 [2022-11-20 12:49:43,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:43,284 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-20 12:49:43,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:49:43,284 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-20 12:49:43,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-20 12:49:43,285 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:43,285 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:43,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-20 12:49:43,285 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:43,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:43,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1914076215, now seen corresponding path program 1 times [2022-11-20 12:49:43,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:43,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212958639] [2022-11-20 12:49:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:43,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:43,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:43,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:43,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212958639] [2022-11-20 12:49:43,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212958639] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:43,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6679730] [2022-11-20 12:49:43,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:43,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:43,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:43,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:43,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 12:49:43,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:43,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-20 12:49:43,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:43,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:43,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:43,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 12:49:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:43,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6679730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:43,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:43,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-20 12:49:43,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417067193] [2022-11-20 12:49:43,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:43,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-20 12:49:43,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:43,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-20 12:49:43,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-20 12:49:43,936 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 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 12:49:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:44,168 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-11-20 12:49:44,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 12:49:44,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-20 12:49:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:44,169 INFO L225 Difference]: With dead ends: 36 [2022-11-20 12:49:44,169 INFO L226 Difference]: Without dead ends: 36 [2022-11-20 12:49:44,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-11-20 12:49:44,170 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 169 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:44,170 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 57 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:49:44,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-20 12:49:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-11-20 12:49:44,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:49:44,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-11-20 12:49:44,173 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2022-11-20 12:49:44,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:44,173 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-11-20 12:49:44,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 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 12:49:44,173 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-11-20 12:49:44,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-20 12:49:44,174 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:44,174 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:44,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:44,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-20 12:49:44,375 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:44,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:44,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1668744869, now seen corresponding path program 2 times [2022-11-20 12:49:44,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:44,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265604801] [2022-11-20 12:49:44,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:44,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:44,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:44,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265604801] [2022-11-20 12:49:44,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265604801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:44,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883065026] [2022-11-20 12:49:44,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:49:44,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:44,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:44,752 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:44,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 12:49:44,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:49:44,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:49:44,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 12:49:44,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:44,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:49:45,183 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:49:45,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 12:49:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:45,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:45,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:49:45,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:49:45,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 12:49:45,782 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:45,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883065026] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:45,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:45,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-11-20 12:49:45,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524243756] [2022-11-20 12:49:45,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:45,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 12:49:45,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:45,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 12:49:45,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-11-20 12:49:45,784 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:49:46,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:46,200 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-11-20 12:49:46,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:49:46,201 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-20 12:49:46,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:46,201 INFO L225 Difference]: With dead ends: 52 [2022-11-20 12:49:46,201 INFO L226 Difference]: Without dead ends: 49 [2022-11-20 12:49:46,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2022-11-20 12:49:46,203 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:46,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 175 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 82 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-11-20 12:49:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-20 12:49:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 42. [2022-11-20 12:49:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 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 12:49:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-11-20 12:49:46,205 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 22 [2022-11-20 12:49:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:46,206 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-11-20 12:49:46,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:49:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-11-20 12:49:46,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-20 12:49:46,207 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:46,207 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:46,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:46,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-20 12:49:46,412 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:46,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:46,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1831987682, now seen corresponding path program 1 times [2022-11-20 12:49:46,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:46,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63601721] [2022-11-20 12:49:46,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:46,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:46,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:46,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63601721] [2022-11-20 12:49:46,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63601721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:46,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935586770] [2022-11-20 12:49:46,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:46,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:46,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:46,851 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:46,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 12:49:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:46,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 12:49:46,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:47,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:49:47,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 12:49:47,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:49:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:47,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:47,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:49:47,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 12:49:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:47,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935586770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:47,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:47,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-11-20 12:49:47,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92856642] [2022-11-20 12:49:47,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:47,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 12:49:47,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:47,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 12:49:47,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-11-20 12:49:47,602 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:49:47,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:47,925 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-11-20 12:49:47,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-20 12:49:47,926 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-11-20 12:49:47,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:47,926 INFO L225 Difference]: With dead ends: 50 [2022-11-20 12:49:47,926 INFO L226 Difference]: Without dead ends: 39 [2022-11-20 12:49:47,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2022-11-20 12:49:47,927 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 80 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:47,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 141 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 153 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-11-20 12:49:47,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-20 12:49:47,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2022-11-20 12:49:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 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 12:49:47,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-11-20 12:49:47,930 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 24 [2022-11-20 12:49:47,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:47,931 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-11-20 12:49:47,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:49:47,931 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-11-20 12:49:47,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 12:49:47,932 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:47,932 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:47,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:48,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-20 12:49:48,133 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:48,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:48,133 INFO L85 PathProgramCache]: Analyzing trace with hash -938115935, now seen corresponding path program 2 times [2022-11-20 12:49:48,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:48,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973960439] [2022-11-20 12:49:48,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:48,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:48,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:48,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973960439] [2022-11-20 12:49:48,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973960439] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:48,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955893885] [2022-11-20 12:49:48,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:49:48,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:48,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:48,476 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:48,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 12:49:48,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:49:48,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:49:48,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-20 12:49:48,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:48,715 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:48,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:48,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 12:49:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:48,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955893885] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:48,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:48,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-11-20 12:49:48,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27351750] [2022-11-20 12:49:48,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:48,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-20 12:49:48,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:48,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-20 12:49:48,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-11-20 12:49:48,964 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 states have internal predecessors, (62), 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 12:49:49,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:49,245 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2022-11-20 12:49:49,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 12:49:49,245 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 12:49:49,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:49,246 INFO L225 Difference]: With dead ends: 51 [2022-11-20 12:49:49,246 INFO L226 Difference]: Without dead ends: 51 [2022-11-20 12:49:49,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-11-20 12:49:49,247 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 231 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:49,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 110 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 12:49:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-20 12:49:49,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2022-11-20 12:49:49,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 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 12:49:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2022-11-20 12:49:49,249 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 28 [2022-11-20 12:49:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:49,250 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2022-11-20 12:49:49,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.263157894736842) internal successors, (62), 20 states have internal predecessors, (62), 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 12:49:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2022-11-20 12:49:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-20 12:49:49,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:49,251 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:49,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:49,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:49,457 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:49,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:49,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1721723482, now seen corresponding path program 3 times [2022-11-20 12:49:49,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:49,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105481513] [2022-11-20 12:49:49,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:49,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:49,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:49,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105481513] [2022-11-20 12:49:49,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105481513] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:49,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854462824] [2022-11-20 12:49:49,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:49:49,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:49,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:49,855 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:49,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-20 12:49:49,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-20 12:49:49,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:49:49,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-20 12:49:49,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:50,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:49:50,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:49:50,233 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:50,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:50,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:49:50,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:49:50,454 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:50,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854462824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:50,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:50,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-11-20 12:49:50,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290566486] [2022-11-20 12:49:50,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:50,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-20 12:49:50,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:50,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-20 12:49:50,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-11-20 12:49:50,457 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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 12:49:50,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:50,894 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2022-11-20 12:49:50,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:49:50,894 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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 31 [2022-11-20 12:49:50,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:50,895 INFO L225 Difference]: With dead ends: 72 [2022-11-20 12:49:50,895 INFO L226 Difference]: Without dead ends: 45 [2022-11-20 12:49:50,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=976, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:49:50,896 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 132 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:50,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 202 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 232 Invalid, 0 Unknown, 23 Unchecked, 0.2s Time] [2022-11-20 12:49:50,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-20 12:49:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2022-11-20 12:49:50,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 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 12:49:50,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2022-11-20 12:49:50,898 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 31 [2022-11-20 12:49:50,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:50,898 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2022-11-20 12:49:50,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.608695652173913) internal successors, (60), 23 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 12:49:50,899 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2022-11-20 12:49:50,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 12:49:50,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:50,899 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:50,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:51,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-20 12:49:51,100 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:51,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:51,100 INFO L85 PathProgramCache]: Analyzing trace with hash 374629827, now seen corresponding path program 4 times [2022-11-20 12:49:51,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:51,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878267693] [2022-11-20 12:49:51,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:51,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:51,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:51,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878267693] [2022-11-20 12:49:51,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878267693] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:51,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820184019] [2022-11-20 12:49:51,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:49:51,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:51,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:51,494 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:51,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-20 12:49:51,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:49:51,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:49:51,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-20 12:49:51,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:51,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:49:51,810 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:51,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:52,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820184019] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:52,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:52,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-11-20 12:49:52,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570407843] [2022-11-20 12:49:52,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:52,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 12:49:52,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:52,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 12:49:52,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-11-20 12:49:52,172 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 28 states have internal predecessors, (88), 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 12:49:52,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:52,544 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-11-20 12:49:52,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 12:49:52,545 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 28 states have internal predecessors, (88), 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 35 [2022-11-20 12:49:52,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:52,545 INFO L225 Difference]: With dead ends: 55 [2022-11-20 12:49:52,545 INFO L226 Difference]: Without dead ends: 55 [2022-11-20 12:49:52,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:49:52,546 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 419 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:52,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 156 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:49:52,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-11-20 12:49:52,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2022-11-20 12:49:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.125) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:49:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-11-20 12:49:52,548 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 35 [2022-11-20 12:49:52,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:52,549 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-11-20 12:49:52,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.259259259259259) internal successors, (88), 28 states have internal predecessors, (88), 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 12:49:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-11-20 12:49:52,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 12:49:52,550 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:52,550 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:52,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:52,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-20 12:49:52,755 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:52,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:52,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1667122081, now seen corresponding path program 5 times [2022-11-20 12:49:52,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:52,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596948704] [2022-11-20 12:49:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:52,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:53,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:53,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596948704] [2022-11-20 12:49:53,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596948704] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:53,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841504697] [2022-11-20 12:49:53,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:49:53,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:53,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:53,232 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:53,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-20 12:49:53,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-20 12:49:53,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:49:53,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 12:49:53,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:53,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:49:53,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:49:53,651 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:53,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:53,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:49:53,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:49:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:53,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841504697] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:53,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:53,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-11-20 12:49:53,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133656579] [2022-11-20 12:49:53,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:53,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-20 12:49:53,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:53,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-20 12:49:53,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-11-20 12:49:53,900 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 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 12:49:54,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:54,476 INFO L93 Difference]: Finished difference Result 129 states and 142 transitions. [2022-11-20 12:49:54,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:49:54,476 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 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 40 [2022-11-20 12:49:54,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:54,477 INFO L225 Difference]: With dead ends: 129 [2022-11-20 12:49:54,477 INFO L226 Difference]: Without dead ends: 103 [2022-11-20 12:49:54,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=238, Invalid=1322, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 12:49:54,479 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 261 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:54,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 270 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 346 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-11-20 12:49:54,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-11-20 12:49:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 59. [2022-11-20 12:49:54,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 58 states have internal predecessors, (65), 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 12:49:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2022-11-20 12:49:54,482 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 40 [2022-11-20 12:49:54,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:54,482 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2022-11-20 12:49:54,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 26 states have internal predecessors, (73), 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 12:49:54,483 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2022-11-20 12:49:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-20 12:49:54,484 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:54,484 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:54,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:54,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:54,685 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:54,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:54,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1130414300, now seen corresponding path program 3 times [2022-11-20 12:49:54,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:54,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460209806] [2022-11-20 12:49:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:54,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:55,317 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:55,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:55,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460209806] [2022-11-20 12:49:55,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460209806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:55,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869663847] [2022-11-20 12:49:55,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:49:55,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:55,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:55,319 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:55,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-20 12:49:55,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-20 12:49:55,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:49:55,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 12:49:55,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:55,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:49:55,740 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-20 12:49:55,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:49:55,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:49:55,813 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:55,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:55,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:49:55,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:49:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:56,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869663847] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:56,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:56,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2022-11-20 12:49:56,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119810654] [2022-11-20 12:49:56,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:56,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-20 12:49:56,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:56,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-20 12:49:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-11-20 12:49:56,055 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 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 12:49:56,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:56,779 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2022-11-20 12:49:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-20 12:49:56,780 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-11-20 12:49:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:56,780 INFO L225 Difference]: With dead ends: 90 [2022-11-20 12:49:56,781 INFO L226 Difference]: Without dead ends: 56 [2022-11-20 12:49:56,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 12:49:56,786 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 135 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:56,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 312 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 426 Invalid, 0 Unknown, 34 Unchecked, 0.3s Time] [2022-11-20 12:49:56,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-20 12:49:56,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2022-11-20 12:49:56,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 52 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:49:56,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2022-11-20 12:49:56,799 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 42 [2022-11-20 12:49:56,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:56,799 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2022-11-20 12:49:56,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 27 states have internal predecessors, (79), 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 12:49:56,800 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2022-11-20 12:49:56,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-20 12:49:56,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:56,802 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:56,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-20 12:49:57,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:57,008 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:57,008 INFO L85 PathProgramCache]: Analyzing trace with hash 537281572, now seen corresponding path program 6 times [2022-11-20 12:49:57,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:57,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926096662] [2022-11-20 12:49:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:57,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:57,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 6 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:57,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:57,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926096662] [2022-11-20 12:49:57,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926096662] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:57,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232854203] [2022-11-20 12:49:57,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:49:57,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:57,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:57,443 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:57,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-20 12:49:57,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-20 12:49:57,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:49:57,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-20 12:49:57,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:57,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:58,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 12:49:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:58,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232854203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:49:58,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:49:58,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-11-20 12:49:58,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905058844] [2022-11-20 12:49:58,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:49:58,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 12:49:58,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:49:58,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 12:49:58,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2022-11-20 12:49:58,214 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 32 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 32 states have internal predecessors, (108), 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 12:49:58,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:49:58,613 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-11-20 12:49:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-20 12:49:58,614 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 32 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-11-20 12:49:58,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:49:58,615 INFO L225 Difference]: With dead ends: 66 [2022-11-20 12:49:58,615 INFO L226 Difference]: Without dead ends: 66 [2022-11-20 12:49:58,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 63 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2022-11-20 12:49:58,616 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 474 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:49:58,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 221 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 12:49:58,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-20 12:49:58,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-11-20 12:49:58,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.11864406779661) internal successors, (66), 59 states have internal predecessors, (66), 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 12:49:58,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2022-11-20 12:49:58,619 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 44 [2022-11-20 12:49:58,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:49:58,619 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2022-11-20 12:49:58,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 32 states have internal predecessors, (108), 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 12:49:58,620 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2022-11-20 12:49:58,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-20 12:49:58,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:49:58,620 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:49:58,631 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-20 12:49:58,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-20 12:49:58,826 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:49:58,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:49:58,826 INFO L85 PathProgramCache]: Analyzing trace with hash 967653856, now seen corresponding path program 7 times [2022-11-20 12:49:58,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:49:58,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476294733] [2022-11-20 12:49:58,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:49:58,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:49:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:59,338 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:59,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:49:59,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476294733] [2022-11-20 12:49:59,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476294733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:49:59,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322700734] [2022-11-20 12:49:59,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:49:59,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:49:59,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:49:59,340 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:49:59,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-20 12:49:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:49:59,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-20 12:49:59,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:49:59,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:49:59,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:49:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:49:59,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:49:59,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:49:59,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:50:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:00,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322700734] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:50:00,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:50:00,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 29 [2022-11-20 12:50:00,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280558706] [2022-11-20 12:50:00,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:00,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 12:50:00,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:00,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 12:50:00,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-11-20 12:50:00,144 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 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 12:50:00,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:50:00,932 INFO L93 Difference]: Finished difference Result 145 states and 160 transitions. [2022-11-20 12:50:00,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 12:50:00,933 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 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 49 [2022-11-20 12:50:00,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:50:00,934 INFO L225 Difference]: With dead ends: 145 [2022-11-20 12:50:00,934 INFO L226 Difference]: Without dead ends: 106 [2022-11-20 12:50:00,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=275, Invalid=1795, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 12:50:00,936 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 183 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:50:00,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 412 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 517 Invalid, 0 Unknown, 75 Unchecked, 0.3s Time] [2022-11-20 12:50:00,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-20 12:50:00,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2022-11-20 12:50:00,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 69 states have internal predecessors, (77), 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 12:50:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-11-20 12:50:00,939 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 49 [2022-11-20 12:50:00,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:50:00,939 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-11-20 12:50:00,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9655172413793105) internal successors, (86), 29 states have internal predecessors, (86), 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 12:50:00,940 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-11-20 12:50:00,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-20 12:50:00,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:50:00,940 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:50:00,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-11-20 12:50:01,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:01,147 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:50:01,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:50:01,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1795888381, now seen corresponding path program 4 times [2022-11-20 12:50:01,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:50:01,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177328575] [2022-11-20 12:50:01,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:01,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:50:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:01,751 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:01,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:50:01,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177328575] [2022-11-20 12:50:01,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177328575] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:01,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67947803] [2022-11-20 12:50:01,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:50:01,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:01,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:50:01,755 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:50:01,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-20 12:50:01,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:50:01,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:50:01,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-20 12:50:01,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:50:02,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:50:02,219 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-20 12:50:02,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:50:02,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:50:02,294 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:02,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:02,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:50:02,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:50:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 17 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:02,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67947803] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:50:02,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:50:02,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 29 [2022-11-20 12:50:02,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259525613] [2022-11-20 12:50:02,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:02,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 12:50:02,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:02,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 12:50:02,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-11-20 12:50:02,545 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 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 12:50:03,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:50:03,325 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2022-11-20 12:50:03,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-20 12:50:03,325 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 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 51 [2022-11-20 12:50:03,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:50:03,326 INFO L225 Difference]: With dead ends: 114 [2022-11-20 12:50:03,326 INFO L226 Difference]: Without dead ends: 67 [2022-11-20 12:50:03,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=275, Invalid=1795, Unknown=0, NotChecked=0, Total=2070 [2022-11-20 12:50:03,328 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 232 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:50:03,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 402 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 12:50:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-20 12:50:03,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-11-20 12:50:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1111111111111112) internal successors, (70), 63 states have internal predecessors, (70), 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 12:50:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2022-11-20 12:50:03,330 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 51 [2022-11-20 12:50:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:50:03,330 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2022-11-20 12:50:03,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.1724137931034484) internal successors, (92), 29 states have internal predecessors, (92), 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 12:50:03,331 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2022-11-20 12:50:03,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-20 12:50:03,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:50:03,332 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:50:03,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-20 12:50:03,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:03,538 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:50:03,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:50:03,538 INFO L85 PathProgramCache]: Analyzing trace with hash 999955645, now seen corresponding path program 8 times [2022-11-20 12:50:03,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:50:03,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023123949] [2022-11-20 12:50:03,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:03,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:50:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 15 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:04,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:50:04,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023123949] [2022-11-20 12:50:04,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023123949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:04,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933706676] [2022-11-20 12:50:04,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:50:04,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:04,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:50:04,095 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:50:04,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-20 12:50:04,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:50:04,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:50:04,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-20 12:50:04,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:50:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:04,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:04,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 12:50:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 28 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:04,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933706676] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:50:04,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:50:04,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 31 [2022-11-20 12:50:04,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656552923] [2022-11-20 12:50:04,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:04,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-20 12:50:04,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:04,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-20 12:50:04,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-11-20 12:50:04,960 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 32 states have internal predecessors, (110), 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 12:50:05,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:50:05,583 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-11-20 12:50:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-20 12:50:05,584 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 32 states have internal predecessors, (110), 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 53 [2022-11-20 12:50:05,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:50:05,584 INFO L225 Difference]: With dead ends: 77 [2022-11-20 12:50:05,585 INFO L226 Difference]: Without dead ends: 77 [2022-11-20 12:50:05,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 82 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 12:50:05,586 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 452 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:50:05,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 328 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:50:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-20 12:50:05,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2022-11-20 12:50:05,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 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 12:50:05,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 78 transitions. [2022-11-20 12:50:05,589 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 78 transitions. Word has length 53 [2022-11-20 12:50:05,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:50:05,589 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 78 transitions. [2022-11-20 12:50:05,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.5483870967741935) internal successors, (110), 32 states have internal predecessors, (110), 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 12:50:05,590 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 78 transitions. [2022-11-20 12:50:05,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-20 12:50:05,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:50:05,590 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:50:05,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-20 12:50:05,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:05,796 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:50:05,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:50:05,797 INFO L85 PathProgramCache]: Analyzing trace with hash -36316953, now seen corresponding path program 9 times [2022-11-20 12:50:05,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:50:05,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407545673] [2022-11-20 12:50:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:05,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:50:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:06,420 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:06,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:50:06,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407545673] [2022-11-20 12:50:06,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407545673] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:06,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396042398] [2022-11-20 12:50:06,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:50:06,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:06,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:50:06,423 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:50:06,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-20 12:50:06,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 12:50:06,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:50:06,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 54 conjunts are in the unsatisfiable core [2022-11-20 12:50:06,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:50:06,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:50:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:07,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:07,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:50:07,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:50:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 21 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:07,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396042398] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:50:07,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:50:07,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 33 [2022-11-20 12:50:07,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596882707] [2022-11-20 12:50:07,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:07,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-20 12:50:07,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:07,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-20 12:50:07,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2022-11-20 12:50:07,350 INFO L87 Difference]: Start difference. First operand 71 states and 78 transitions. Second operand has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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 12:50:08,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:50:08,341 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2022-11-20 12:50:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-20 12:50:08,341 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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 58 [2022-11-20 12:50:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:50:08,342 INFO L225 Difference]: With dead ends: 138 [2022-11-20 12:50:08,342 INFO L226 Difference]: Without dead ends: 78 [2022-11-20 12:50:08,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=318, Invalid=2438, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 12:50:08,343 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 270 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:50:08,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 537 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 689 Invalid, 0 Unknown, 82 Unchecked, 0.4s Time] [2022-11-20 12:50:08,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-20 12:50:08,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2022-11-20 12:50:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 74 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:50:08,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2022-11-20 12:50:08,345 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 58 [2022-11-20 12:50:08,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:50:08,345 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2022-11-20 12:50:08,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0606060606060606) internal successors, (101), 33 states have internal predecessors, (101), 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 12:50:08,346 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2022-11-20 12:50:08,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-20 12:50:08,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:50:08,346 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:50:08,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-20 12:50:08,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-20 12:50:08,547 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:50:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:50:08,547 INFO L85 PathProgramCache]: Analyzing trace with hash 514711210, now seen corresponding path program 10 times [2022-11-20 12:50:08,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:50:08,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63040515] [2022-11-20 12:50:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:08,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:50:08,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:09,096 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 28 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:09,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:50:09,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63040515] [2022-11-20 12:50:09,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63040515] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:09,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221842784] [2022-11-20 12:50:09,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:50:09,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:09,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:50:09,099 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:50:09,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-20 12:50:09,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:50:09,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:50:09,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-20 12:50:09,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:50:09,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:50:09,610 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 45 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:09,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:10,306 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 45 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:10,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221842784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:50:10,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:50:10,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 42 [2022-11-20 12:50:10,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650791030] [2022-11-20 12:50:10,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:10,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-20 12:50:10,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:10,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-20 12:50:10,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2022-11-20 12:50:10,309 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 43 states, 42 states have (on average 3.6666666666666665) internal successors, (154), 43 states have internal predecessors, (154), 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 12:50:10,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:50:10,913 INFO L93 Difference]: Finished difference Result 88 states and 97 transitions. [2022-11-20 12:50:10,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-20 12:50:10,914 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 3.6666666666666665) internal successors, (154), 43 states have internal predecessors, (154), 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 62 [2022-11-20 12:50:10,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:50:10,914 INFO L225 Difference]: With dead ends: 88 [2022-11-20 12:50:10,915 INFO L226 Difference]: Without dead ends: 88 [2022-11-20 12:50:10,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=545, Invalid=2211, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 12:50:10,916 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 573 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 573 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:50:10,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [573 Valid, 413 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 12:50:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-11-20 12:50:10,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2022-11-20 12:50:10,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1111111111111112) internal successors, (90), 81 states have internal predecessors, (90), 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 12:50:10,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2022-11-20 12:50:10,919 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 62 [2022-11-20 12:50:10,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:50:10,919 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2022-11-20 12:50:10,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 3.6666666666666665) internal successors, (154), 43 states have internal predecessors, (154), 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 12:50:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2022-11-20 12:50:10,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-20 12:50:10,920 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:50:10,920 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:50:10,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-20 12:50:11,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-20 12:50:11,127 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:50:11,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:50:11,128 INFO L85 PathProgramCache]: Analyzing trace with hash -94420198, now seen corresponding path program 11 times [2022-11-20 12:50:11,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:50:11,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359858227] [2022-11-20 12:50:11,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:11,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:50:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:11,850 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:11,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:50:11,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359858227] [2022-11-20 12:50:11,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359858227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:11,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750069219] [2022-11-20 12:50:11,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:50:11,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:11,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:50:11,855 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:50:11,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-20 12:50:11,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-20 12:50:11,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:50:11,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-20 12:50:11,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:50:12,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:50:12,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:50:15,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:50:15,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2022-11-20 12:50:15,569 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 45 proven. 132 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:15,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:16,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:50:16,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:50:17,678 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 45 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:17,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750069219] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:50:17,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:50:17,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 56 [2022-11-20 12:50:17,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353794657] [2022-11-20 12:50:17,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:17,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 12:50:17,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:17,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 12:50:17,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=2802, Unknown=1, NotChecked=0, Total=3080 [2022-11-20 12:50:17,682 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 56 states, 56 states have (on average 3.482142857142857) internal successors, (195), 56 states have internal predecessors, (195), 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 12:50:19,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:50:19,901 INFO L93 Difference]: Finished difference Result 167 states and 187 transitions. [2022-11-20 12:50:19,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 12:50:19,902 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.482142857142857) internal successors, (195), 56 states have internal predecessors, (195), 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 67 [2022-11-20 12:50:19,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:50:19,903 INFO L225 Difference]: With dead ends: 167 [2022-11-20 12:50:19,903 INFO L226 Difference]: Without dead ends: 164 [2022-11-20 12:50:19,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=477, Invalid=4352, Unknown=1, NotChecked=0, Total=4830 [2022-11-20 12:50:19,905 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 152 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:50:19,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1029 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 747 Invalid, 0 Unknown, 56 Unchecked, 0.5s Time] [2022-11-20 12:50:19,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-20 12:50:19,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 147. [2022-11-20 12:50:19,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.143835616438356) internal successors, (167), 146 states have internal predecessors, (167), 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 12:50:19,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 167 transitions. [2022-11-20 12:50:19,909 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 167 transitions. Word has length 67 [2022-11-20 12:50:19,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:50:19,910 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 167 transitions. [2022-11-20 12:50:19,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.482142857142857) internal successors, (195), 56 states have internal predecessors, (195), 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 12:50:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 167 transitions. [2022-11-20 12:50:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-20 12:50:19,911 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:50:19,911 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:50:19,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-20 12:50:20,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-20 12:50:20,118 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:50:20,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:50:20,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1045878647, now seen corresponding path program 5 times [2022-11-20 12:50:20,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:50:20,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68159931] [2022-11-20 12:50:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:20,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:50:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:20,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:50:20,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68159931] [2022-11-20 12:50:20,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68159931] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:20,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912954029] [2022-11-20 12:50:20,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:50:20,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:20,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:50:20,935 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:50:20,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-20 12:50:21,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-20 12:50:21,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:50:21,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-20 12:50:21,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:50:21,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:50:21,499 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-20 12:50:21,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:50:21,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:50:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:21,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:21,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:50:21,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:50:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 25 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:21,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912954029] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:50:21,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:50:21,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 35 [2022-11-20 12:50:21,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60300834] [2022-11-20 12:50:21,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:21,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-20 12:50:21,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:21,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-20 12:50:21,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-11-20 12:50:21,945 INFO L87 Difference]: Start difference. First operand 147 states and 167 transitions. Second operand has 35 states, 35 states have (on average 3.3714285714285714) internal successors, (118), 35 states have internal predecessors, (118), 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 12:50:23,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:50:23,003 INFO L93 Difference]: Finished difference Result 190 states and 214 transitions. [2022-11-20 12:50:23,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 12:50:23,004 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.3714285714285714) internal successors, (118), 35 states have internal predecessors, (118), 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 69 [2022-11-20 12:50:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:50:23,004 INFO L225 Difference]: With dead ends: 190 [2022-11-20 12:50:23,005 INFO L226 Difference]: Without dead ends: 119 [2022-11-20 12:50:23,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=269, Invalid=2487, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 12:50:23,006 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 269 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:50:23,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 645 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 822 Invalid, 0 Unknown, 73 Unchecked, 0.5s Time] [2022-11-20 12:50:23,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-20 12:50:23,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-11-20 12:50:23,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.1304347826086956) internal successors, (130), 115 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:50:23,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 130 transitions. [2022-11-20 12:50:23,009 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 130 transitions. Word has length 69 [2022-11-20 12:50:23,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:50:23,009 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 130 transitions. [2022-11-20 12:50:23,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.3714285714285714) internal successors, (118), 35 states have internal predecessors, (118), 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 12:50:23,009 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 130 transitions. [2022-11-20 12:50:23,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-20 12:50:23,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:50:23,010 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:50:23,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-20 12:50:23,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-20 12:50:23,217 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:50:23,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:50:23,217 INFO L85 PathProgramCache]: Analyzing trace with hash -83187244, now seen corresponding path program 6 times [2022-11-20 12:50:23,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:50:23,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62016610] [2022-11-20 12:50:23,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:23,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:50:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 45 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:24,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:50:24,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62016610] [2022-11-20 12:50:24,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62016610] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:24,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720286595] [2022-11-20 12:50:24,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:50:24,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:24,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:50:24,011 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:50:24,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-20 12:50:24,189 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-20 12:50:24,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:50:24,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-20 12:50:24,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:50:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 66 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:24,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:25,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 12:50:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 66 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:25,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720286595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:50:25,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:50:25,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 46 [2022-11-20 12:50:25,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284791364] [2022-11-20 12:50:25,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:25,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 12:50:25,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:25,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 12:50:25,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1841, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 12:50:25,478 INFO L87 Difference]: Start difference. First operand 116 states and 130 transitions. Second operand has 47 states, 46 states have (on average 3.9782608695652173) internal successors, (183), 47 states have internal predecessors, (183), 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 12:50:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:50:26,319 INFO L93 Difference]: Finished difference Result 131 states and 147 transitions. [2022-11-20 12:50:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-20 12:50:26,324 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.9782608695652173) internal successors, (183), 47 states have internal predecessors, (183), 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 73 [2022-11-20 12:50:26,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:50:26,325 INFO L225 Difference]: With dead ends: 131 [2022-11-20 12:50:26,325 INFO L226 Difference]: Without dead ends: 131 [2022-11-20 12:50:26,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 109 SyntacticMatches, 8 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=659, Invalid=2647, Unknown=0, NotChecked=0, Total=3306 [2022-11-20 12:50:26,326 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 776 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:50:26,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [776 Valid, 438 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:50:26,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-20 12:50:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2022-11-20 12:50:26,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.108695652173913) internal successors, (102), 92 states have internal predecessors, (102), 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 12:50:26,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2022-11-20 12:50:26,329 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 73 [2022-11-20 12:50:26,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:50:26,329 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2022-11-20 12:50:26,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.9782608695652173) internal successors, (183), 47 states have internal predecessors, (183), 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 12:50:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2022-11-20 12:50:26,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-20 12:50:26,330 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:50:26,330 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:50:26,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-20 12:50:26,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-20 12:50:26,531 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:50:26,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:50:26,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1424467667, now seen corresponding path program 12 times [2022-11-20 12:50:26,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:50:26,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124761123] [2022-11-20 12:50:26,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:26,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:50:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:27,319 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:27,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:50:27,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124761123] [2022-11-20 12:50:27,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124761123] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:27,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821286162] [2022-11-20 12:50:27,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:50:27,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:27,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:50:27,321 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:50:27,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-20 12:50:27,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-20 12:50:27,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:50:27,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 12:50:27,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:50:27,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:50:28,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:50:28,041 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:28,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:28,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:50:28,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:50:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:28,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821286162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:50:28,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:50:28,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2022-11-20 12:50:28,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915956812] [2022-11-20 12:50:28,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:28,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 12:50:28,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:28,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 12:50:28,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 12:50:28,375 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 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 12:50:29,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:50:29,616 INFO L93 Difference]: Finished difference Result 205 states and 228 transitions. [2022-11-20 12:50:29,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 12:50:29,616 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 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 76 [2022-11-20 12:50:29,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:50:29,617 INFO L225 Difference]: With dead ends: 205 [2022-11-20 12:50:29,617 INFO L226 Difference]: Without dead ends: 160 [2022-11-20 12:50:29,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 133 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=278, Invalid=2914, Unknown=0, NotChecked=0, Total=3192 [2022-11-20 12:50:29,619 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 130 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1274 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 1390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:50:29,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 969 Invalid, 1390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1274 Invalid, 0 Unknown, 100 Unchecked, 0.6s Time] [2022-11-20 12:50:29,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-20 12:50:29,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 103. [2022-11-20 12:50:29,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.107843137254902) internal successors, (113), 102 states have internal predecessors, (113), 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 12:50:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2022-11-20 12:50:29,623 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 76 [2022-11-20 12:50:29,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:50:29,623 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2022-11-20 12:50:29,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.289473684210526) internal successors, (125), 38 states have internal predecessors, (125), 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 12:50:29,624 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2022-11-20 12:50:29,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-20 12:50:29,625 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:50:29,625 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:50:29,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-20 12:50:29,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:29,831 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:50:29,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:50:29,831 INFO L85 PathProgramCache]: Analyzing trace with hash 653582896, now seen corresponding path program 7 times [2022-11-20 12:50:29,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:50:29,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167073106] [2022-11-20 12:50:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:29,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:50:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 29 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:30,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:50:30,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167073106] [2022-11-20 12:50:30,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167073106] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:30,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113364663] [2022-11-20 12:50:30,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:50:30,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:30,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:50:30,750 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:50:30,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-20 12:50:30,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:30,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-20 12:50:30,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:50:31,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:50:31,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:50:31,355 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:50:32,327 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:50:32,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 12:50:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 66 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:32,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:33,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:50:33,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 12:50:33,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-11-20 12:50:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 239 backedges. 66 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:34,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113364663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:50:34,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:50:34,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 56 [2022-11-20 12:50:34,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328413162] [2022-11-20 12:50:34,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:34,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 12:50:34,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:34,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 12:50:34,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2834, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 12:50:34,005 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand has 56 states, 56 states have (on average 3.5357142857142856) internal successors, (198), 56 states have internal predecessors, (198), 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 12:50:35,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:50:35,345 INFO L93 Difference]: Finished difference Result 185 states and 206 transitions. [2022-11-20 12:50:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 12:50:35,347 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.5357142857142856) internal successors, (198), 56 states have internal predecessors, (198), 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 78 [2022-11-20 12:50:35,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:50:35,348 INFO L225 Difference]: With dead ends: 185 [2022-11-20 12:50:35,348 INFO L226 Difference]: Without dead ends: 182 [2022-11-20 12:50:35,350 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 137 SyntacticMatches, 13 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=427, Invalid=4543, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 12:50:35,350 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 220 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:50:35,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 859 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 632 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-11-20 12:50:35,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-11-20 12:50:35,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 165. [2022-11-20 12:50:35,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.1341463414634145) internal successors, (186), 164 states have internal predecessors, (186), 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 12:50:35,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 186 transitions. [2022-11-20 12:50:35,355 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 186 transitions. Word has length 78 [2022-11-20 12:50:35,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:50:35,356 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 186 transitions. [2022-11-20 12:50:35,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.5357142857142856) internal successors, (198), 56 states have internal predecessors, (198), 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 12:50:35,356 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 186 transitions. [2022-11-20 12:50:35,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-20 12:50:35,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:50:35,357 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:50:35,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-20 12:50:35,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:35,563 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:50:35,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:50:35,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1677653747, now seen corresponding path program 8 times [2022-11-20 12:50:35,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:50:35,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875868220] [2022-11-20 12:50:35,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:35,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:50:35,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:36,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:50:36,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875868220] [2022-11-20 12:50:36,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875868220] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:36,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322869849] [2022-11-20 12:50:36,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:50:36,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:36,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:50:36,543 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:50:36,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-20 12:50:36,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:50:36,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:50:36,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-20 12:50:36,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:50:36,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:50:36,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:50:37,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:50:37,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:50:37,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:50:37,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:50:38,148 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:50:38,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 12:50:38,351 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 66 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:38,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:39,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:50:39,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 12:50:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 66 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:40,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322869849] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:50:40,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:50:40,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2022-11-20 12:50:40,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030059172] [2022-11-20 12:50:40,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:40,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-20 12:50:40,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:40,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-20 12:50:40,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=3689, Unknown=0, NotChecked=0, Total=4032 [2022-11-20 12:50:40,174 INFO L87 Difference]: Start difference. First operand 165 states and 186 transitions. Second operand has 64 states, 64 states have (on average 3.65625) internal successors, (234), 64 states have internal predecessors, (234), 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 12:50:43,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:50:43,553 INFO L93 Difference]: Finished difference Result 237 states and 267 transitions. [2022-11-20 12:50:43,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 12:50:43,553 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.65625) internal successors, (234), 64 states have internal predecessors, (234), 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 80 [2022-11-20 12:50:43,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:50:43,556 INFO L225 Difference]: With dead ends: 237 [2022-11-20 12:50:43,556 INFO L226 Difference]: Without dead ends: 234 [2022-11-20 12:50:43,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 139 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1040 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=572, Invalid=5590, Unknown=0, NotChecked=0, Total=6162 [2022-11-20 12:50:43,557 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 263 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:50:43,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 896 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 633 Invalid, 0 Unknown, 75 Unchecked, 0.3s Time] [2022-11-20 12:50:43,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-11-20 12:50:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 162. [2022-11-20 12:50:43,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.1304347826086956) internal successors, (182), 161 states have internal predecessors, (182), 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 12:50:43,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 182 transitions. [2022-11-20 12:50:43,563 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 182 transitions. Word has length 80 [2022-11-20 12:50:43,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:50:43,564 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 182 transitions. [2022-11-20 12:50:43,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.65625) internal successors, (234), 64 states have internal predecessors, (234), 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 12:50:43,564 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 182 transitions. [2022-11-20 12:50:43,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-20 12:50:43,565 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:50:43,565 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:50:43,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-20 12:50:43,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:43,781 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:50:43,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:50:43,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1534296525, now seen corresponding path program 9 times [2022-11-20 12:50:43,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:50:43,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127876131] [2022-11-20 12:50:43,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:50:43,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:50:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:50:44,765 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:50:44,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:50:44,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127876131] [2022-11-20 12:50:44,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127876131] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:50:44,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484016197] [2022-11-20 12:50:44,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:50:44,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:50:44,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:50:44,767 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:50:44,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-20 12:50:44,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-20 12:50:44,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:50:44,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-20 12:50:44,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:50:45,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:50:45,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:50:45,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:50:45,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:50:45,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:50:47,116 INFO L321 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2022-11-20 12:50:47,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 48 treesize of output 51 [2022-11-20 12:50:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 70 proven. 153 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:50:47,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:50:49,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 53 [2022-11-20 12:50:49,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 77 [2022-11-20 12:50:49,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-11-20 12:50:50,161 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 12:50:50,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484016197] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:50:50,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:50:50,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28, 28] total 75 [2022-11-20 12:50:50,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179172634] [2022-11-20 12:50:50,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:50:50,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-11-20 12:50:50,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:50:50,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-11-20 12:50:50,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=5043, Unknown=0, NotChecked=0, Total=5550 [2022-11-20 12:50:50,164 INFO L87 Difference]: Start difference. First operand 162 states and 182 transitions. Second operand has 75 states, 75 states have (on average 2.8133333333333335) internal successors, (211), 75 states have internal predecessors, (211), 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 12:51:08,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:51:08,595 INFO L93 Difference]: Finished difference Result 429 states and 486 transitions. [2022-11-20 12:51:08,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-11-20 12:51:08,596 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.8133333333333335) internal successors, (211), 75 states have internal predecessors, (211), 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 80 [2022-11-20 12:51:08,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:51:08,597 INFO L225 Difference]: With dead ends: 429 [2022-11-20 12:51:08,598 INFO L226 Difference]: Without dead ends: 426 [2022-11-20 12:51:08,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 143 SyntacticMatches, 4 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13906 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=5350, Invalid=38960, Unknown=0, NotChecked=0, Total=44310 [2022-11-20 12:51:08,603 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 452 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:51:08,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 922 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 732 Invalid, 0 Unknown, 111 Unchecked, 0.5s Time] [2022-11-20 12:51:08,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-11-20 12:51:08,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 310. [2022-11-20 12:51:08,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 1.1650485436893203) internal successors, (360), 309 states have internal predecessors, (360), 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 12:51:08,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 360 transitions. [2022-11-20 12:51:08,611 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 360 transitions. Word has length 80 [2022-11-20 12:51:08,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:51:08,611 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 360 transitions. [2022-11-20 12:51:08,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.8133333333333335) internal successors, (211), 75 states have internal predecessors, (211), 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 12:51:08,612 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 360 transitions. [2022-11-20 12:51:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-20 12:51:08,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:51:08,613 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:51:08,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-20 12:51:08,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:08,823 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:51:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:08,824 INFO L85 PathProgramCache]: Analyzing trace with hash 621406541, now seen corresponding path program 10 times [2022-11-20 12:51:08,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:08,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420536070] [2022-11-20 12:51:08,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:08,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:09,775 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:09,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:09,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420536070] [2022-11-20 12:51:09,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420536070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:09,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135047401] [2022-11-20 12:51:09,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:51:09,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:09,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:09,777 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:09,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-20 12:51:09,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:51:09,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:51:09,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-20 12:51:09,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:10,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:51:10,416 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-20 12:51:10,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:51:10,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 12:51:10,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:51:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:10,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:51:10,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:51:10,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:51:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 29 proven. 212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:10,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135047401] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:51:10,840 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:51:10,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2022-11-20 12:51:10,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311617242] [2022-11-20 12:51:10,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:51:10,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-20 12:51:10,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:51:10,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-20 12:51:10,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2022-11-20 12:51:10,842 INFO L87 Difference]: Start difference. First operand 310 states and 360 transitions. Second operand has 38 states, 38 states have (on average 3.5) internal successors, (133), 38 states have internal predecessors, (133), 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 12:51:12,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:51:12,267 INFO L93 Difference]: Finished difference Result 351 states and 394 transitions. [2022-11-20 12:51:12,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-20 12:51:12,267 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5) internal successors, (133), 38 states have internal predecessors, (133), 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 80 [2022-11-20 12:51:12,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:51:12,268 INFO L225 Difference]: With dead ends: 351 [2022-11-20 12:51:12,268 INFO L226 Difference]: Without dead ends: 167 [2022-11-20 12:51:12,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 143 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=353, Invalid=3429, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 12:51:12,269 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 404 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:51:12,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 921 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1283 Invalid, 0 Unknown, 77 Unchecked, 0.7s Time] [2022-11-20 12:51:12,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-20 12:51:12,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2022-11-20 12:51:12,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.1411042944785277) internal successors, (186), 163 states have internal predecessors, (186), 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 12:51:12,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 186 transitions. [2022-11-20 12:51:12,274 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 186 transitions. Word has length 80 [2022-11-20 12:51:12,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:51:12,274 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 186 transitions. [2022-11-20 12:51:12,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5) internal successors, (133), 38 states have internal predecessors, (133), 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 12:51:12,275 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 186 transitions. [2022-11-20 12:51:12,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-11-20 12:51:12,276 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:51:12,276 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:51:12,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-20 12:51:12,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-20 12:51:12,482 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:51:12,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:12,482 INFO L85 PathProgramCache]: Analyzing trace with hash 139598669, now seen corresponding path program 11 times [2022-11-20 12:51:12,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:12,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001824941] [2022-11-20 12:51:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:12,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:13,236 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 66 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:13,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:13,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001824941] [2022-11-20 12:51:13,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001824941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:13,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955039093] [2022-11-20 12:51:13,236 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:51:13,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:13,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:13,239 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:13,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-20 12:51:13,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-20 12:51:13,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:51:13,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-20 12:51:13,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:13,475 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:51:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 91 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:13,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:51:15,110 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 91 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:15,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955039093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:51:15,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:51:15,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 50 [2022-11-20 12:51:15,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591919870] [2022-11-20 12:51:15,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:51:15,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-20 12:51:15,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:51:15,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-20 12:51:15,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=2178, Unknown=0, NotChecked=0, Total=2550 [2022-11-20 12:51:15,112 INFO L87 Difference]: Start difference. First operand 164 states and 186 transitions. Second operand has 51 states, 50 states have (on average 4.04) internal successors, (202), 51 states have internal predecessors, (202), 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 12:51:16,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:51:16,047 INFO L93 Difference]: Finished difference Result 190 states and 216 transitions. [2022-11-20 12:51:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-20 12:51:16,050 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.04) internal successors, (202), 51 states have internal predecessors, (202), 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 82 [2022-11-20 12:51:16,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:51:16,051 INFO L225 Difference]: With dead ends: 190 [2022-11-20 12:51:16,052 INFO L226 Difference]: Without dead ends: 190 [2022-11-20 12:51:16,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=827, Invalid=3079, Unknown=0, NotChecked=0, Total=3906 [2022-11-20 12:51:16,053 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 720 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:51:16,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 568 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 869 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-20 12:51:16,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-11-20 12:51:16,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 176. [2022-11-20 12:51:16,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.1428571428571428) internal successors, (200), 175 states have internal predecessors, (200), 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 12:51:16,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 200 transitions. [2022-11-20 12:51:16,057 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 200 transitions. Word has length 82 [2022-11-20 12:51:16,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:51:16,058 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 200 transitions. [2022-11-20 12:51:16,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.04) internal successors, (202), 51 states have internal predecessors, (202), 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 12:51:16,058 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 200 transitions. [2022-11-20 12:51:16,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-20 12:51:16,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:51:16,059 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:51:16,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-20 12:51:16,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-20 12:51:16,265 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:51:16,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:16,266 INFO L85 PathProgramCache]: Analyzing trace with hash -265915305, now seen corresponding path program 12 times [2022-11-20 12:51:16,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:16,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642550013] [2022-11-20 12:51:16,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:16,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:17,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:17,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642550013] [2022-11-20 12:51:17,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642550013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:17,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321359284] [2022-11-20 12:51:17,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:51:17,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:17,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:17,185 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:17,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-20 12:51:17,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-20 12:51:17,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:51:17,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-20 12:51:17,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:17,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:51:18,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 12:51:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:18,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:51:18,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:51:18,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:51:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 309 backedges. 33 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:18,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321359284] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:51:18,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:51:18,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 42 [2022-11-20 12:51:18,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668224429] [2022-11-20 12:51:18,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:51:18,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-20 12:51:18,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:51:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-20 12:51:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1606, Unknown=0, NotChecked=0, Total=1722 [2022-11-20 12:51:18,524 INFO L87 Difference]: Start difference. First operand 176 states and 200 transitions. Second operand has 42 states, 42 states have (on average 3.380952380952381) internal successors, (142), 42 states have internal predecessors, (142), 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 12:51:20,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:51:20,335 INFO L93 Difference]: Finished difference Result 524 states and 600 transitions. [2022-11-20 12:51:20,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 12:51:20,336 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.380952380952381) internal successors, (142), 42 states have internal predecessors, (142), 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 87 [2022-11-20 12:51:20,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:51:20,337 INFO L225 Difference]: With dead ends: 524 [2022-11-20 12:51:20,338 INFO L226 Difference]: Without dead ends: 376 [2022-11-20 12:51:20,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=429, Invalid=4541, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 12:51:20,338 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 234 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 1719 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 1238 SdHoareTripleChecker+Invalid, 1809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:51:20,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 1238 Invalid, 1809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1719 Invalid, 0 Unknown, 67 Unchecked, 0.8s Time] [2022-11-20 12:51:20,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-20 12:51:20,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 186. [2022-11-20 12:51:20,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.1405405405405404) internal successors, (211), 185 states have internal predecessors, (211), 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 12:51:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 211 transitions. [2022-11-20 12:51:20,344 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 211 transitions. Word has length 87 [2022-11-20 12:51:20,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:51:20,345 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 211 transitions. [2022-11-20 12:51:20,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.380952380952381) internal successors, (142), 42 states have internal predecessors, (142), 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 12:51:20,345 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 211 transitions. [2022-11-20 12:51:20,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-20 12:51:20,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:51:20,346 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:51:20,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-20 12:51:20,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-20 12:51:20,552 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:51:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:20,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1352982196, now seen corresponding path program 13 times [2022-11-20 12:51:20,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:20,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529513596] [2022-11-20 12:51:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:20,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 33 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:21,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:21,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529513596] [2022-11-20 12:51:21,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529513596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:21,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912939997] [2022-11-20 12:51:21,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:51:21,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:21,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:21,623 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:21,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-20 12:51:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:21,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-20 12:51:21,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:22,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:51:22,277 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-20 12:51:22,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:51:22,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 12:51:22,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:51:22,404 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 33 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:22,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:51:22,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:51:22,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:51:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 33 proven. 278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:22,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912939997] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:51:22,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:51:22,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2022-11-20 12:51:22,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847515018] [2022-11-20 12:51:22,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:51:22,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-20 12:51:22,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:51:22,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-20 12:51:22,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1528, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 12:51:22,815 INFO L87 Difference]: Start difference. First operand 186 states and 211 transitions. Second operand has 41 states, 41 states have (on average 3.5609756097560976) internal successors, (146), 41 states have internal predecessors, (146), 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 12:51:24,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:51:24,578 INFO L93 Difference]: Finished difference Result 339 states and 383 transitions. [2022-11-20 12:51:24,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-20 12:51:24,578 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.5609756097560976) internal successors, (146), 41 states have internal predecessors, (146), 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 89 [2022-11-20 12:51:24,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:51:24,580 INFO L225 Difference]: With dead ends: 339 [2022-11-20 12:51:24,580 INFO L226 Difference]: Without dead ends: 183 [2022-11-20 12:51:24,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=423, Invalid=4407, Unknown=0, NotChecked=0, Total=4830 [2022-11-20 12:51:24,581 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 426 mSDsluCounter, 1029 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:51:24,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 1074 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1506 Invalid, 0 Unknown, 64 Unchecked, 0.8s Time] [2022-11-20 12:51:24,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-20 12:51:24,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2022-11-20 12:51:24,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.1396648044692737) internal successors, (204), 179 states have internal predecessors, (204), 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 12:51:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 204 transitions. [2022-11-20 12:51:24,585 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 204 transitions. Word has length 89 [2022-11-20 12:51:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:51:24,585 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 204 transitions. [2022-11-20 12:51:24,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5609756097560976) internal successors, (146), 41 states have internal predecessors, (146), 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 12:51:24,586 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 204 transitions. [2022-11-20 12:51:24,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-20 12:51:24,587 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:51:24,587 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:51:24,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-20 12:51:24,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-20 12:51:24,791 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:51:24,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:24,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2127607436, now seen corresponding path program 14 times [2022-11-20 12:51:24,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:24,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673979471] [2022-11-20 12:51:24,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:24,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 91 proven. 251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:25,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:25,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673979471] [2022-11-20 12:51:25,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673979471] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:25,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064719410] [2022-11-20 12:51:25,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:51:25,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:25,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:25,686 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:25,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-20 12:51:25,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:51:25,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:51:25,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-20 12:51:25,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 120 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:26,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:51:26,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 12:51:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 120 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:27,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064719410] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:51:27,215 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:51:27,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 47 [2022-11-20 12:51:27,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669720130] [2022-11-20 12:51:27,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:51:27,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 12:51:27,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:51:27,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 12:51:27,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=1977, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 12:51:27,217 INFO L87 Difference]: Start difference. First operand 180 states and 204 transitions. Second operand has 48 states, 47 states have (on average 3.9574468085106385) internal successors, (186), 48 states have internal predecessors, (186), 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 12:51:28,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:51:28,423 INFO L93 Difference]: Finished difference Result 206 states and 234 transitions. [2022-11-20 12:51:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 12:51:28,424 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.9574468085106385) internal successors, (186), 48 states have internal predecessors, (186), 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 91 [2022-11-20 12:51:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:51:28,425 INFO L225 Difference]: With dead ends: 206 [2022-11-20 12:51:28,425 INFO L226 Difference]: Without dead ends: 206 [2022-11-20 12:51:28,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 146 SyntacticMatches, 10 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=690, Invalid=2970, Unknown=0, NotChecked=0, Total=3660 [2022-11-20 12:51:28,426 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 725 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:51:28,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 809 Invalid, 1303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 12:51:28,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-11-20 12:51:28,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 192. [2022-11-20 12:51:28,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.1413612565445026) internal successors, (218), 191 states have internal predecessors, (218), 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 12:51:28,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 218 transitions. [2022-11-20 12:51:28,431 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 218 transitions. Word has length 91 [2022-11-20 12:51:28,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:51:28,431 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 218 transitions. [2022-11-20 12:51:28,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.9574468085106385) internal successors, (186), 48 states have internal predecessors, (186), 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 12:51:28,432 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 218 transitions. [2022-11-20 12:51:28,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-20 12:51:28,433 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:51:28,433 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:51:28,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-20 12:51:28,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-20 12:51:28,639 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:51:28,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:28,639 INFO L85 PathProgramCache]: Analyzing trace with hash 987956880, now seen corresponding path program 15 times [2022-11-20 12:51:28,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:28,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908018755] [2022-11-20 12:51:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:28,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:29,702 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:29,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:29,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908018755] [2022-11-20 12:51:29,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908018755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:29,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73954316] [2022-11-20 12:51:29,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:51:29,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:29,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:29,704 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:29,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-20 12:51:29,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-20 12:51:29,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:51:29,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 82 conjunts are in the unsatisfiable core [2022-11-20 12:51:29,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:30,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:51:30,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 12:51:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:30,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:51:30,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:51:30,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:51:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 37 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:31,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73954316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:51:31,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:51:31,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 45 [2022-11-20 12:51:31,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95689975] [2022-11-20 12:51:31,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:51:31,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-20 12:51:31,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:51:31,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-20 12:51:31,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1857, Unknown=0, NotChecked=0, Total=1980 [2022-11-20 12:51:31,117 INFO L87 Difference]: Start difference. First operand 192 states and 218 transitions. Second operand has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 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 12:51:33,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:51:33,352 INFO L93 Difference]: Finished difference Result 378 states and 429 transitions. [2022-11-20 12:51:33,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-20 12:51:33,353 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 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 96 [2022-11-20 12:51:33,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:51:33,354 INFO L225 Difference]: With dead ends: 378 [2022-11-20 12:51:33,354 INFO L226 Difference]: Without dead ends: 199 [2022-11-20 12:51:33,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 171 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=466, Invalid=5386, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 12:51:33,355 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 545 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 2011 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1429 SdHoareTripleChecker+Invalid, 2127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-20 12:51:33,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 1429 Invalid, 2127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2011 Invalid, 0 Unknown, 89 Unchecked, 1.0s Time] [2022-11-20 12:51:33,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-11-20 12:51:33,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 196. [2022-11-20 12:51:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 1.1384615384615384) internal successors, (222), 195 states have internal predecessors, (222), 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 12:51:33,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 222 transitions. [2022-11-20 12:51:33,360 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 222 transitions. Word has length 96 [2022-11-20 12:51:33,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:51:33,360 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 222 transitions. [2022-11-20 12:51:33,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 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 12:51:33,361 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 222 transitions. [2022-11-20 12:51:33,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-20 12:51:33,362 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:51:33,362 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:51:33,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-20 12:51:33,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-20 12:51:33,569 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:51:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash 441164307, now seen corresponding path program 16 times [2022-11-20 12:51:33,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:33,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482653604] [2022-11-20 12:51:33,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:33,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 120 proven. 305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:34,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:34,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482653604] [2022-11-20 12:51:34,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482653604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:34,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598768313] [2022-11-20 12:51:34,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:51:34,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:34,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:34,492 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:34,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-20 12:51:34,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:51:34,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:51:34,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-20 12:51:34,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:34,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:51:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:35,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:51:36,535 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 153 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:36,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598768313] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:51:36,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:51:36,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 62 [2022-11-20 12:51:36,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117861317] [2022-11-20 12:51:36,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:51:36,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-20 12:51:36,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:51:36,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-20 12:51:36,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=3401, Unknown=0, NotChecked=0, Total=3906 [2022-11-20 12:51:36,540 INFO L87 Difference]: Start difference. First operand 196 states and 222 transitions. Second operand has 63 states, 62 states have (on average 3.967741935483871) internal successors, (246), 63 states have internal predecessors, (246), 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 12:51:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:51:37,728 INFO L93 Difference]: Finished difference Result 218 states and 247 transitions. [2022-11-20 12:51:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-20 12:51:37,729 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 3.967741935483871) internal successors, (246), 63 states have internal predecessors, (246), 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 100 [2022-11-20 12:51:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:51:37,730 INFO L225 Difference]: With dead ends: 218 [2022-11-20 12:51:37,730 INFO L226 Difference]: Without dead ends: 218 [2022-11-20 12:51:37,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1137, Invalid=4715, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 12:51:37,730 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 1186 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:51:37,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1186 Valid, 972 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:51:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-11-20 12:51:37,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 173. [2022-11-20 12:51:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.127906976744186) internal successors, (194), 172 states have internal predecessors, (194), 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 12:51:37,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 194 transitions. [2022-11-20 12:51:37,734 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 194 transitions. Word has length 100 [2022-11-20 12:51:37,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:51:37,735 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 194 transitions. [2022-11-20 12:51:37,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 3.967741935483871) internal successors, (246), 63 states have internal predecessors, (246), 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 12:51:37,735 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 194 transitions. [2022-11-20 12:51:37,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-20 12:51:37,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:51:37,737 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:51:37,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-20 12:51:37,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:37,943 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:51:37,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:37,943 INFO L85 PathProgramCache]: Analyzing trace with hash -528637551, now seen corresponding path program 17 times [2022-11-20 12:51:37,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:37,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741314535] [2022-11-20 12:51:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:37,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:39,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:39,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741314535] [2022-11-20 12:51:39,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741314535] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:39,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544345561] [2022-11-20 12:51:39,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:51:39,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:39,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:39,212 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:39,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-20 12:51:39,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-20 12:51:39,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:51:39,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-20 12:51:39,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:39,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:51:40,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 12:51:40,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:51:40,233 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:40,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:51:40,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:51:40,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:51:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 476 backedges. 41 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:40,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544345561] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:51:40,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:51:40,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2022-11-20 12:51:40,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179585955] [2022-11-20 12:51:40,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:51:40,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-20 12:51:40,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:51:40,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-20 12:51:40,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2036, Unknown=0, NotChecked=0, Total=2162 [2022-11-20 12:51:40,667 INFO L87 Difference]: Start difference. First operand 173 states and 194 transitions. Second operand has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 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 12:51:43,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:51:43,111 INFO L93 Difference]: Finished difference Result 464 states and 527 transitions. [2022-11-20 12:51:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-20 12:51:43,112 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 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 105 [2022-11-20 12:51:43,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:51:43,113 INFO L225 Difference]: With dead ends: 464 [2022-11-20 12:51:43,113 INFO L226 Difference]: Without dead ends: 308 [2022-11-20 12:51:43,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=497, Invalid=6145, Unknown=0, NotChecked=0, Total=6642 [2022-11-20 12:51:43,114 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 262 mSDsluCounter, 1583 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1638 SdHoareTripleChecker+Invalid, 2422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:51:43,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 1638 Invalid, 2422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2231 Invalid, 0 Unknown, 162 Unchecked, 1.1s Time] [2022-11-20 12:51:43,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-20 12:51:43,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 183. [2022-11-20 12:51:43,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.1263736263736264) internal successors, (205), 182 states have internal predecessors, (205), 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 12:51:43,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 205 transitions. [2022-11-20 12:51:43,119 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 205 transitions. Word has length 105 [2022-11-20 12:51:43,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:51:43,119 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 205 transitions. [2022-11-20 12:51:43,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 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 12:51:43,119 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 205 transitions. [2022-11-20 12:51:43,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-20 12:51:43,120 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:51:43,120 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:51:43,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-20 12:51:43,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:43,327 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:51:43,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:43,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1592038702, now seen corresponding path program 18 times [2022-11-20 12:51:43,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:43,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266025366] [2022-11-20 12:51:43,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:43,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 41 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:44,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:44,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266025366] [2022-11-20 12:51:44,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266025366] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:44,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515869374] [2022-11-20 12:51:44,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:51:44,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:44,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:44,430 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:44,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-20 12:51:44,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-20 12:51:44,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:51:44,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-20 12:51:44,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:45,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:51:45,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 12:51:45,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-20 12:51:45,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:51:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 41 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:45,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:51:45,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:51:45,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:51:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 41 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:46,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515869374] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:51:46,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:51:46,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 54 [2022-11-20 12:51:46,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956714693] [2022-11-20 12:51:46,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:51:46,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-11-20 12:51:46,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:51:46,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-11-20 12:51:46,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2719, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 12:51:46,381 INFO L87 Difference]: Start difference. First operand 183 states and 205 transitions. Second operand has 54 states, 54 states have (on average 3.9074074074074074) internal successors, (211), 54 states have internal predecessors, (211), 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 12:51:48,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:51:48,590 INFO L93 Difference]: Finished difference Result 299 states and 336 transitions. [2022-11-20 12:51:48,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 12:51:48,590 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.9074074074074074) internal successors, (211), 54 states have internal predecessors, (211), 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 107 [2022-11-20 12:51:48,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:51:48,591 INFO L225 Difference]: With dead ends: 299 [2022-11-20 12:51:48,591 INFO L226 Difference]: Without dead ends: 180 [2022-11-20 12:51:48,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=363, Invalid=5489, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 12:51:48,592 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 370 mSDsluCounter, 1838 mSDsCounter, 0 mSdLazyCounter, 2769 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1893 SdHoareTripleChecker+Invalid, 2802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:51:48,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 1893 Invalid, 2802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2769 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 12:51:48,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-11-20 12:51:48,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2022-11-20 12:51:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.125) internal successors, (198), 176 states have internal predecessors, (198), 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 12:51:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 198 transitions. [2022-11-20 12:51:48,596 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 198 transitions. Word has length 107 [2022-11-20 12:51:48,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:51:48,597 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 198 transitions. [2022-11-20 12:51:48,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.9074074074074074) internal successors, (211), 54 states have internal predecessors, (211), 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 12:51:48,597 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 198 transitions. [2022-11-20 12:51:48,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-11-20 12:51:48,598 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:51:48,598 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:51:48,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-20 12:51:48,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:48,805 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:51:48,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:48,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1328040302, now seen corresponding path program 19 times [2022-11-20 12:51:48,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:48,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489128052] [2022-11-20 12:51:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:48,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:48,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:49,625 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 153 proven. 364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:49,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:49,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489128052] [2022-11-20 12:51:49,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489128052] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:49,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515310206] [2022-11-20 12:51:49,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:51:49,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:49,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:49,627 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:49,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-20 12:51:49,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:49,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-20 12:51:49,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 190 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:50,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:51:51,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 12:51:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 190 proven. 327 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:51,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515310206] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:51:51,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:51:51,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 55 [2022-11-20 12:51:51,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997812667] [2022-11-20 12:51:51,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:51:51,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 12:51:51,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:51:51,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 12:51:51,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=2703, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 12:51:51,405 INFO L87 Difference]: Start difference. First operand 177 states and 198 transitions. Second operand has 56 states, 55 states have (on average 4.036363636363636) internal successors, (222), 56 states have internal predecessors, (222), 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 12:51:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:51:52,604 INFO L93 Difference]: Finished difference Result 192 states and 215 transitions. [2022-11-20 12:51:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 12:51:52,605 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 4.036363636363636) internal successors, (222), 56 states have internal predecessors, (222), 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 109 [2022-11-20 12:51:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:51:52,606 INFO L225 Difference]: With dead ends: 192 [2022-11-20 12:51:52,606 INFO L226 Difference]: Without dead ends: 192 [2022-11-20 12:51:52,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 176 SyntacticMatches, 12 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=927, Invalid=4043, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 12:51:52,607 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 1294 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 1495 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1294 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:51:52,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1294 Valid, 1007 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1495 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-20 12:51:52,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-11-20 12:51:52,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 137. [2022-11-20 12:51:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.1029411764705883) internal successors, (150), 136 states have internal predecessors, (150), 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 12:51:52,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 150 transitions. [2022-11-20 12:51:52,611 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 150 transitions. Word has length 109 [2022-11-20 12:51:52,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:51:52,611 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 150 transitions. [2022-11-20 12:51:52,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 4.036363636363636) internal successors, (222), 56 states have internal predecessors, (222), 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 12:51:52,612 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 150 transitions. [2022-11-20 12:51:52,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-20 12:51:52,613 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:51:52,613 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:51:52,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-20 12:51:52,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:52,818 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:51:52,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:52,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1140811079, now seen corresponding path program 13 times [2022-11-20 12:51:52,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:52,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457420429] [2022-11-20 12:51:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:52,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:52,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:53,890 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:53,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:53,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457420429] [2022-11-20 12:51:53,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457420429] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:53,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488812080] [2022-11-20 12:51:53,890 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:51:53,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:53,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:53,891 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:53,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-20 12:51:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:54,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-20 12:51:54,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:54,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:51:54,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:51:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:54,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:51:55,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:51:55,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:51:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 45 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:55,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488812080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:51:55,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:51:55,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 50 [2022-11-20 12:51:55,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019365215] [2022-11-20 12:51:55,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:51:55,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-20 12:51:55,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:51:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-20 12:51:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2317, Unknown=0, NotChecked=0, Total=2450 [2022-11-20 12:51:55,298 INFO L87 Difference]: Start difference. First operand 137 states and 150 transitions. Second operand has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 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 12:51:58,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:51:58,029 INFO L93 Difference]: Finished difference Result 282 states and 314 transitions. [2022-11-20 12:51:58,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-20 12:51:58,029 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 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 112 [2022-11-20 12:51:58,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:51:58,030 INFO L225 Difference]: With dead ends: 282 [2022-11-20 12:51:58,030 INFO L226 Difference]: Without dead ends: 144 [2022-11-20 12:51:58,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=534, Invalid=7122, Unknown=0, NotChecked=0, Total=7656 [2022-11-20 12:51:58,031 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 828 mSDsluCounter, 1738 mSDsCounter, 0 mSdLazyCounter, 2588 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 828 SdHoareTripleChecker+Valid, 1798 SdHoareTripleChecker+Invalid, 2624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:51:58,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [828 Valid, 1798 Invalid, 2624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2588 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 12:51:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-11-20 12:51:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2022-11-20 12:51:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.1) internal successors, (154), 140 states have internal predecessors, (154), 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 12:51:58,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 154 transitions. [2022-11-20 12:51:58,034 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 154 transitions. Word has length 112 [2022-11-20 12:51:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:51:58,044 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 154 transitions. [2022-11-20 12:51:58,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 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 12:51:58,044 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 154 transitions. [2022-11-20 12:51:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-20 12:51:58,044 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:51:58,045 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:51:58,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-11-20 12:51:58,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-20 12:51:58,245 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:51:58,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:51:58,246 INFO L85 PathProgramCache]: Analyzing trace with hash -339750852, now seen corresponding path program 14 times [2022-11-20 12:51:58,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:51:58,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427470586] [2022-11-20 12:51:58,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:51:58,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:51:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:51:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 190 proven. 428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:59,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:51:59,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427470586] [2022-11-20 12:51:59,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427470586] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:51:59,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972849303] [2022-11-20 12:51:59,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:51:59,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:51:59,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:51:59,142 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:51:59,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-20 12:51:59,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:51:59,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:51:59,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-20 12:51:59,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:51:59,970 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 231 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:51:59,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:52:00,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 12:52:01,087 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 231 proven. 387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:01,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972849303] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:52:01,087 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:52:01,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 59 [2022-11-20 12:52:01,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712507867] [2022-11-20 12:52:01,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:52:01,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-20 12:52:01,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:52:01,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-20 12:52:01,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=3108, Unknown=0, NotChecked=0, Total=3540 [2022-11-20 12:52:01,089 INFO L87 Difference]: Start difference. First operand 141 states and 154 transitions. Second operand has 60 states, 59 states have (on average 4.0) internal successors, (236), 60 states have internal predecessors, (236), 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 12:52:02,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:52:02,506 INFO L93 Difference]: Finished difference Result 154 states and 169 transitions. [2022-11-20 12:52:02,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-20 12:52:02,507 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.0) internal successors, (236), 60 states have internal predecessors, (236), 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 116 [2022-11-20 12:52:02,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:52:02,508 INFO L225 Difference]: With dead ends: 154 [2022-11-20 12:52:02,508 INFO L226 Difference]: Without dead ends: 154 [2022-11-20 12:52:02,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 187 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1059, Invalid=4641, Unknown=0, NotChecked=0, Total=5700 [2022-11-20 12:52:02,509 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 593 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 1863 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:52:02,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [593 Valid, 1197 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1863 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-20 12:52:02,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-20 12:52:02,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2022-11-20 12:52:02,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.1020408163265305) internal successors, (162), 147 states have internal predecessors, (162), 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 12:52:02,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 162 transitions. [2022-11-20 12:52:02,513 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 162 transitions. Word has length 116 [2022-11-20 12:52:02,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:52:02,513 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 162 transitions. [2022-11-20 12:52:02,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.0) internal successors, (236), 60 states have internal predecessors, (236), 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 12:52:02,514 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 162 transitions. [2022-11-20 12:52:02,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-20 12:52:02,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:52:02,515 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:52:02,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-20 12:52:02,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-20 12:52:02,721 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:52:02,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:52:02,721 INFO L85 PathProgramCache]: Analyzing trace with hash -385909560, now seen corresponding path program 15 times [2022-11-20 12:52:02,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:52:02,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657164426] [2022-11-20 12:52:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:52:02,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:52:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:52:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:03,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:52:03,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657164426] [2022-11-20 12:52:03,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657164426] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:52:03,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083762471] [2022-11-20 12:52:03,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:52:03,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:52:03,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:52:03,911 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:52:03,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-20 12:52:04,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-20 12:52:04,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:52:04,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 56 conjunts are in the unsatisfiable core [2022-11-20 12:52:04,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:52:04,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-20 12:52:04,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-11-20 12:52:05,785 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:52:05,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2022-11-20 12:52:06,131 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2022-11-20 12:52:06,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:52:07,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-11-20 12:52:07,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2022-11-20 12:52:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 12 proven. 61 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2022-11-20 12:52:07,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083762471] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:52:07,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:52:07,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 9, 9] total 48 [2022-11-20 12:52:07,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418749738] [2022-11-20 12:52:07,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:52:07,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-20 12:52:07,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:52:07,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-20 12:52:07,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2022-11-20 12:52:07,668 INFO L87 Difference]: Start difference. First operand 148 states and 162 transitions. Second operand has 48 states, 48 states have (on average 3.3541666666666665) internal successors, (161), 48 states have internal predecessors, (161), 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 12:52:13,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:52:13,518 INFO L93 Difference]: Finished difference Result 305 states and 343 transitions. [2022-11-20 12:52:13,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-20 12:52:13,518 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.3541666666666665) internal successors, (161), 48 states have internal predecessors, (161), 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 121 [2022-11-20 12:52:13,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:52:13,519 INFO L225 Difference]: With dead ends: 305 [2022-11-20 12:52:13,520 INFO L226 Difference]: Without dead ends: 302 [2022-11-20 12:52:13,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 238 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2634 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=880, Invalid=13400, Unknown=0, NotChecked=0, Total=14280 [2022-11-20 12:52:13,522 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 101 mSDsluCounter, 1483 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1526 SdHoareTripleChecker+Invalid, 1850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:52:13,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 1526 Invalid, 1850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1462 Invalid, 0 Unknown, 368 Unchecked, 0.8s Time] [2022-11-20 12:52:13,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-11-20 12:52:13,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 273. [2022-11-20 12:52:13,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.1433823529411764) internal successors, (311), 272 states have internal predecessors, (311), 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 12:52:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 311 transitions. [2022-11-20 12:52:13,527 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 311 transitions. Word has length 121 [2022-11-20 12:52:13,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:52:13,527 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 311 transitions. [2022-11-20 12:52:13,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.3541666666666665) internal successors, (161), 48 states have internal predecessors, (161), 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 12:52:13,528 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 311 transitions. [2022-11-20 12:52:13,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-20 12:52:13,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:52:13,529 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:52:13,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-11-20 12:52:13,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:52:13,735 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:52:13,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:52:13,736 INFO L85 PathProgramCache]: Analyzing trace with hash 715693285, now seen corresponding path program 20 times [2022-11-20 12:52:13,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:52:13,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679210189] [2022-11-20 12:52:13,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:52:13,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:52:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:52:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:15,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:52:15,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679210189] [2022-11-20 12:52:15,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679210189] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:52:15,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150744233] [2022-11-20 12:52:15,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:52:15,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:52:15,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:52:15,113 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:52:15,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-20 12:52:15,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:52:15,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:52:15,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-20 12:52:15,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:52:15,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:52:16,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:52:16,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:52:17,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:52:17,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 12:52:18,230 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 231 proven. 448 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:18,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:52:20,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:52:20,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 12:52:20,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-11-20 12:52:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 231 proven. 448 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:20,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150744233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:52:20,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:52:20,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 81 [2022-11-20 12:52:20,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377553785] [2022-11-20 12:52:20,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:52:20,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-20 12:52:20,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:52:20,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-20 12:52:20,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=6014, Unknown=0, NotChecked=0, Total=6480 [2022-11-20 12:52:20,800 INFO L87 Difference]: Start difference. First operand 273 states and 311 transitions. Second operand has 81 states, 81 states have (on average 3.8641975308641974) internal successors, (313), 81 states have internal predecessors, (313), 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 12:52:25,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:52:25,372 INFO L93 Difference]: Finished difference Result 422 states and 482 transitions. [2022-11-20 12:52:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 12:52:25,373 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.8641975308641974) internal successors, (313), 81 states have internal predecessors, (313), 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 123 [2022-11-20 12:52:25,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:52:25,375 INFO L225 Difference]: With dead ends: 422 [2022-11-20 12:52:25,376 INFO L226 Difference]: Without dead ends: 419 [2022-11-20 12:52:25,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 218 SyntacticMatches, 17 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=767, Invalid=9333, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 12:52:25,377 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 337 mSDsluCounter, 2149 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 2205 SdHoareTripleChecker+Invalid, 1868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:52:25,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 2205 Invalid, 1868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1575 Invalid, 0 Unknown, 276 Unchecked, 0.9s Time] [2022-11-20 12:52:25,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-11-20 12:52:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 330. [2022-11-20 12:52:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.1519756838905775) internal successors, (379), 329 states have internal predecessors, (379), 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 12:52:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 379 transitions. [2022-11-20 12:52:25,384 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 379 transitions. Word has length 123 [2022-11-20 12:52:25,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:52:25,384 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 379 transitions. [2022-11-20 12:52:25,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.8641975308641974) internal successors, (313), 81 states have internal predecessors, (313), 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 12:52:25,384 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 379 transitions. [2022-11-20 12:52:25,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-20 12:52:25,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:52:25,386 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:52:25,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-11-20 12:52:25,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-20 12:52:25,592 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:52:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:52:25,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1812401035, now seen corresponding path program 21 times [2022-11-20 12:52:25,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:52:25,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272960980] [2022-11-20 12:52:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:52:25,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:52:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:52:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:26,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:52:26,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272960980] [2022-11-20 12:52:26,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272960980] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:52:26,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780027663] [2022-11-20 12:52:26,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:52:26,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:52:27,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:52:27,000 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:52:27,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-20 12:52:27,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-20 12:52:27,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:52:27,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-20 12:52:27,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:52:28,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:52:28,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 12:52:28,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:52:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:28,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:52:28,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:52:28,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:52:28,838 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 49 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:28,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780027663] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:52:28,838 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:52:28,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 53 [2022-11-20 12:52:28,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048220438] [2022-11-20 12:52:28,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:52:28,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-20 12:52:28,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:52:28,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-20 12:52:28,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2616, Unknown=0, NotChecked=0, Total=2756 [2022-11-20 12:52:28,840 INFO L87 Difference]: Start difference. First operand 330 states and 379 transitions. Second operand has 53 states, 53 states have (on average 3.6226415094339623) internal successors, (192), 53 states have internal predecessors, (192), 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 12:52:32,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:52:32,002 INFO L93 Difference]: Finished difference Result 418 states and 476 transitions. [2022-11-20 12:52:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-20 12:52:32,002 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.6226415094339623) internal successors, (192), 53 states have internal predecessors, (192), 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 123 [2022-11-20 12:52:32,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:52:32,003 INFO L225 Difference]: With dead ends: 418 [2022-11-20 12:52:32,003 INFO L226 Difference]: Without dead ends: 270 [2022-11-20 12:52:32,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 223 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1105 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=538, Invalid=7834, Unknown=0, NotChecked=0, Total=8372 [2022-11-20 12:52:32,005 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 718 mSDsluCounter, 2197 mSDsCounter, 0 mSdLazyCounter, 3251 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 2262 SdHoareTripleChecker+Invalid, 3288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:52:32,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [718 Valid, 2262 Invalid, 3288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3251 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-20 12:52:32,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-11-20 12:52:32,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2022-11-20 12:52:32,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.1428571428571428) internal successors, (304), 266 states have internal predecessors, (304), 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 12:52:32,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 304 transitions. [2022-11-20 12:52:32,010 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 304 transitions. Word has length 123 [2022-11-20 12:52:32,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:52:32,010 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 304 transitions. [2022-11-20 12:52:32,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.6226415094339623) internal successors, (192), 53 states have internal predecessors, (192), 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 12:52:32,010 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 304 transitions. [2022-11-20 12:52:32,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-11-20 12:52:32,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:52:32,012 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:52:32,024 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-20 12:52:32,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-20 12:52:32,219 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:52:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:52:32,220 INFO L85 PathProgramCache]: Analyzing trace with hash -166963672, now seen corresponding path program 22 times [2022-11-20 12:52:32,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:52:32,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564452733] [2022-11-20 12:52:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:52:32,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:52:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:52:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 231 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:33,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:52:33,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564452733] [2022-11-20 12:52:33,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564452733] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:52:33,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054592535] [2022-11-20 12:52:33,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:52:33,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:52:33,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:52:33,605 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:52:33,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-20 12:52:33,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:52:33,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:52:33,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-20 12:52:33,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:52:33,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:52:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 276 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:34,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:52:36,587 INFO L134 CoverageAnalysis]: Checked inductivity of 728 backedges. 276 proven. 452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:36,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054592535] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:52:36,588 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:52:36,588 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 77 [2022-11-20 12:52:36,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913767759] [2022-11-20 12:52:36,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:52:36,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-11-20 12:52:36,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:52:36,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-11-20 12:52:36,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=781, Invalid=5225, Unknown=0, NotChecked=0, Total=6006 [2022-11-20 12:52:36,590 INFO L87 Difference]: Start difference. First operand 267 states and 304 transitions. Second operand has 78 states, 77 states have (on average 4.0519480519480515) internal successors, (312), 78 states have internal predecessors, (312), 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 12:52:38,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:52:38,506 INFO L93 Difference]: Finished difference Result 293 states and 334 transitions. [2022-11-20 12:52:38,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-20 12:52:38,506 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 4.0519480519480515) internal successors, (312), 78 states have internal predecessors, (312), 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 127 [2022-11-20 12:52:38,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:52:38,508 INFO L225 Difference]: With dead ends: 293 [2022-11-20 12:52:38,508 INFO L226 Difference]: Without dead ends: 293 [2022-11-20 12:52:38,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2395 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1728, Invalid=7202, Unknown=0, NotChecked=0, Total=8930 [2022-11-20 12:52:38,509 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 1615 mSDsluCounter, 1342 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1615 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 2172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:52:38,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1615 Valid, 1415 Invalid, 2172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2164 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-20 12:52:38,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-11-20 12:52:38,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 224. [2022-11-20 12:52:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.1300448430493273) internal successors, (252), 223 states have internal predecessors, (252), 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 12:52:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 252 transitions. [2022-11-20 12:52:38,513 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 252 transitions. Word has length 127 [2022-11-20 12:52:38,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:52:38,514 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 252 transitions. [2022-11-20 12:52:38,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 4.0519480519480515) internal successors, (312), 78 states have internal predecessors, (312), 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 12:52:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 252 transitions. [2022-11-20 12:52:38,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-11-20 12:52:38,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:52:38,515 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:52:38,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-20 12:52:38,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-20 12:52:38,722 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:52:38,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:52:38,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1002111298, now seen corresponding path program 23 times [2022-11-20 12:52:38,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:52:38,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766032721] [2022-11-20 12:52:38,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:52:38,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:52:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:52:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 53 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:40,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:52:40,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766032721] [2022-11-20 12:52:40,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766032721] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:52:40,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575277840] [2022-11-20 12:52:40,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:52:40,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:52:40,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:52:40,184 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:52:40,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-20 12:52:40,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-11-20 12:52:40,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:52:40,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-20 12:52:40,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:52:41,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:52:41,452 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-20 12:52:41,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:52:41,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:52:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 53 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:41,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:52:41,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:52:41,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:52:42,133 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 53 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:42,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575277840] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:52:42,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:52:42,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 56 [2022-11-20 12:52:42,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475911026] [2022-11-20 12:52:42,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:52:42,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-20 12:52:42,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:52:42,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-20 12:52:42,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2933, Unknown=0, NotChecked=0, Total=3080 [2022-11-20 12:52:42,136 INFO L87 Difference]: Start difference. First operand 224 states and 252 transitions. Second operand has 56 states, 56 states have (on average 3.732142857142857) internal successors, (209), 56 states have internal predecessors, (209), 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 12:52:45,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:52:45,830 INFO L93 Difference]: Finished difference Result 458 states and 520 transitions. [2022-11-20 12:52:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-20 12:52:45,830 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.732142857142857) internal successors, (209), 56 states have internal predecessors, (209), 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 132 [2022-11-20 12:52:45,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:52:45,831 INFO L225 Difference]: With dead ends: 458 [2022-11-20 12:52:45,831 INFO L226 Difference]: Without dead ends: 231 [2022-11-20 12:52:45,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 240 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=608, Invalid=9292, Unknown=0, NotChecked=0, Total=9900 [2022-11-20 12:52:45,832 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 794 mSDsluCounter, 2406 mSDsCounter, 0 mSdLazyCounter, 3571 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 3611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:52:45,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 2476 Invalid, 3611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3571 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-20 12:52:45,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-20 12:52:45,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 228. [2022-11-20 12:52:45,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 1.1277533039647578) internal successors, (256), 227 states have internal predecessors, (256), 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 12:52:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 256 transitions. [2022-11-20 12:52:45,836 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 256 transitions. Word has length 132 [2022-11-20 12:52:45,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:52:45,837 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 256 transitions. [2022-11-20 12:52:45,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.732142857142857) internal successors, (209), 56 states have internal predecessors, (209), 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 12:52:45,837 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 256 transitions. [2022-11-20 12:52:45,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-11-20 12:52:45,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:52:45,838 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:52:45,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-11-20 12:52:46,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-20 12:52:46,043 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:52:46,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:52:46,044 INFO L85 PathProgramCache]: Analyzing trace with hash 856905541, now seen corresponding path program 24 times [2022-11-20 12:52:46,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:52:46,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774154574] [2022-11-20 12:52:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:52:46,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:52:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:52:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 276 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:47,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:52:47,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774154574] [2022-11-20 12:52:47,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774154574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:52:47,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009697538] [2022-11-20 12:52:47,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:52:47,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:52:47,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:52:47,260 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:52:47,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-20 12:52:48,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-20 12:52:48,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:52:48,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 73 conjunts are in the unsatisfiable core [2022-11-20 12:52:48,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:52:48,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:52:49,206 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 325 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:49,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:52:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 325 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:51,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009697538] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:52:51,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:52:51,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 33] total 96 [2022-11-20 12:52:51,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477727484] [2022-11-20 12:52:51,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:52:51,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-20 12:52:51,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:52:51,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-20 12:52:51,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=7979, Unknown=0, NotChecked=0, Total=9312 [2022-11-20 12:52:51,251 INFO L87 Difference]: Start difference. First operand 228 states and 256 transitions. Second operand has 97 states, 96 states have (on average 4.1875) internal successors, (402), 97 states have internal predecessors, (402), 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 12:52:52,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:52:52,620 INFO L93 Difference]: Finished difference Result 252 states and 284 transitions. [2022-11-20 12:52:52,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-20 12:52:52,621 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 4.1875) internal successors, (402), 97 states have internal predecessors, (402), 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 136 [2022-11-20 12:52:52,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:52:52,623 INFO L225 Difference]: With dead ends: 252 [2022-11-20 12:52:52,623 INFO L226 Difference]: Without dead ends: 252 [2022-11-20 12:52:52,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4037 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2543, Invalid=10567, Unknown=0, NotChecked=0, Total=13110 [2022-11-20 12:52:52,624 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1860 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1860 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:52:52,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1860 Valid, 961 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-20 12:52:52,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-11-20 12:52:52,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 240. [2022-11-20 12:52:52,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.1297071129707112) internal successors, (270), 239 states have internal predecessors, (270), 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 12:52:52,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 270 transitions. [2022-11-20 12:52:52,629 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 270 transitions. Word has length 136 [2022-11-20 12:52:52,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:52:52,629 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 270 transitions. [2022-11-20 12:52:52,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 4.1875) internal successors, (402), 97 states have internal predecessors, (402), 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 12:52:52,629 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 270 transitions. [2022-11-20 12:52:52,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-20 12:52:52,630 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:52:52,630 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:52:52,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-20 12:52:52,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:52:52,835 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:52:52,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:52:52,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1423707297, now seen corresponding path program 25 times [2022-11-20 12:52:52,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:52:52,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478147122] [2022-11-20 12:52:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:52:52,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:52:52,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:52:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 57 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:54,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:52:54,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478147122] [2022-11-20 12:52:54,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478147122] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:52:54,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687239011] [2022-11-20 12:52:54,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:52:54,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:52:54,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:52:54,559 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:52:54,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-20 12:52:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:52:54,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-20 12:52:54,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:52:55,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:52:55,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:52:55,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:52:58,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:52:58,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 12:52:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 325 proven. 593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:52:58,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:53:00,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:53:00,998 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:53:01,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 12:53:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 325 proven. 593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:01,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687239011] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:53:01,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:53:01,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 91 [2022-11-20 12:53:01,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408238894] [2022-11-20 12:53:01,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:53:01,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-20 12:53:01,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:53:01,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-20 12:53:01,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=7615, Unknown=0, NotChecked=0, Total=8190 [2022-11-20 12:53:01,607 INFO L87 Difference]: Start difference. First operand 240 states and 270 transitions. Second operand has 91 states, 91 states have (on average 3.9450549450549453) internal successors, (359), 91 states have internal predecessors, (359), 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 12:53:07,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:53:07,129 INFO L93 Difference]: Finished difference Result 491 states and 561 transitions. [2022-11-20 12:53:07,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-20 12:53:07,129 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.9450549450549453) internal successors, (359), 91 states have internal predecessors, (359), 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 141 [2022-11-20 12:53:07,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:53:07,132 INFO L225 Difference]: With dead ends: 491 [2022-11-20 12:53:07,132 INFO L226 Difference]: Without dead ends: 485 [2022-11-20 12:53:07,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 258 SyntacticMatches, 20 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=931, Invalid=11725, Unknown=0, NotChecked=0, Total=12656 [2022-11-20 12:53:07,133 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 404 mSDsluCounter, 2546 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 2610 SdHoareTripleChecker+Invalid, 2266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:53:07,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 2610 Invalid, 2266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1999 Invalid, 0 Unknown, 248 Unchecked, 1.1s Time] [2022-11-20 12:53:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-11-20 12:53:07,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 382. [2022-11-20 12:53:07,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 1.152230971128609) internal successors, (439), 381 states have internal predecessors, (439), 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 12:53:07,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 439 transitions. [2022-11-20 12:53:07,140 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 439 transitions. Word has length 141 [2022-11-20 12:53:07,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:53:07,141 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 439 transitions. [2022-11-20 12:53:07,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.9450549450549453) internal successors, (359), 91 states have internal predecessors, (359), 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 12:53:07,141 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 439 transitions. [2022-11-20 12:53:07,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-20 12:53:07,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:53:07,142 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:53:07,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-20 12:53:07,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:53:07,343 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:53:07,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:53:07,343 INFO L85 PathProgramCache]: Analyzing trace with hash 538757765, now seen corresponding path program 26 times [2022-11-20 12:53:07,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:53:07,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326142032] [2022-11-20 12:53:07,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:53:07,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:53:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 57 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:08,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:53:08,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326142032] [2022-11-20 12:53:08,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326142032] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:53:08,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902688534] [2022-11-20 12:53:08,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:53:08,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:53:08,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:53:08,912 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:53:08,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-20 12:53:09,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:53:09,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:53:09,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 98 conjunts are in the unsatisfiable core [2022-11-20 12:53:09,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:53:09,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:53:10,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:53:10,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:53:12,462 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:53:12,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 12:53:12,765 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 325 proven. 593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:12,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:53:15,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:53:15,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 12:53:15,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-11-20 12:53:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 325 proven. 593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:16,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902688534] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:53:16,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:53:16,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 91 [2022-11-20 12:53:16,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544385964] [2022-11-20 12:53:16,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:53:16,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-20 12:53:16,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:53:16,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-20 12:53:16,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=7615, Unknown=0, NotChecked=0, Total=8190 [2022-11-20 12:53:16,042 INFO L87 Difference]: Start difference. First operand 382 states and 439 transitions. Second operand has 91 states, 91 states have (on average 3.9450549450549453) internal successors, (359), 91 states have internal predecessors, (359), 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 12:53:20,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:53:20,908 INFO L93 Difference]: Finished difference Result 628 states and 722 transitions. [2022-11-20 12:53:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-11-20 12:53:20,908 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.9450549450549453) internal successors, (359), 91 states have internal predecessors, (359), 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 141 [2022-11-20 12:53:20,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:53:20,911 INFO L225 Difference]: With dead ends: 628 [2022-11-20 12:53:20,911 INFO L226 Difference]: Without dead ends: 625 [2022-11-20 12:53:20,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 253 SyntacticMatches, 18 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2619 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=931, Invalid=11725, Unknown=0, NotChecked=0, Total=12656 [2022-11-20 12:53:20,912 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 461 mSDsluCounter, 2950 mSDsCounter, 0 mSdLazyCounter, 1978 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 3015 SdHoareTripleChecker+Invalid, 2206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:53:20,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 3015 Invalid, 2206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1978 Invalid, 0 Unknown, 208 Unchecked, 1.1s Time] [2022-11-20 12:53:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-11-20 12:53:20,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 391. [2022-11-20 12:53:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.1512820512820512) internal successors, (449), 390 states have internal predecessors, (449), 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 12:53:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 449 transitions. [2022-11-20 12:53:20,919 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 449 transitions. Word has length 141 [2022-11-20 12:53:20,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:53:20,920 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 449 transitions. [2022-11-20 12:53:20,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.9450549450549453) internal successors, (359), 91 states have internal predecessors, (359), 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 12:53:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 449 transitions. [2022-11-20 12:53:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-20 12:53:20,921 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:53:20,922 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:53:20,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-20 12:53:21,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-11-20 12:53:21,128 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:53:21,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:53:21,128 INFO L85 PathProgramCache]: Analyzing trace with hash -640183393, now seen corresponding path program 27 times [2022-11-20 12:53:21,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:53:21,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820854757] [2022-11-20 12:53:21,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:53:21,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:53:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:22,675 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 57 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:22,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:53:22,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820854757] [2022-11-20 12:53:22,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820854757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:53:22,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379756863] [2022-11-20 12:53:22,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:53:22,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:53:22,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:53:22,677 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:53:22,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-20 12:53:23,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-20 12:53:23,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:53:23,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-20 12:53:23,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:53:24,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:53:24,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 12:53:24,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:53:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 57 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:24,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:53:24,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:53:24,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:53:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 57 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:24,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379756863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:53:24,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:53:24,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 59 [2022-11-20 12:53:24,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843085208] [2022-11-20 12:53:24,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:53:24,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 12:53:24,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:53:24,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 12:53:24,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 12:53:24,958 INFO L87 Difference]: Start difference. First operand 391 states and 449 transitions. Second operand has 59 states, 59 states have (on average 3.694915254237288) internal successors, (218), 59 states have internal predecessors, (218), 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 12:53:28,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:53:28,995 INFO L93 Difference]: Finished difference Result 704 states and 807 transitions. [2022-11-20 12:53:28,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-20 12:53:28,995 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.694915254237288) internal successors, (218), 59 states have internal predecessors, (218), 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 141 [2022-11-20 12:53:28,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:53:28,998 INFO L225 Difference]: With dead ends: 704 [2022-11-20 12:53:28,998 INFO L226 Difference]: Without dead ends: 483 [2022-11-20 12:53:28,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 257 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=612, Invalid=10100, Unknown=0, NotChecked=0, Total=10712 [2022-11-20 12:53:28,999 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 294 mSDsluCounter, 2719 mSDsCounter, 0 mSdLazyCounter, 3852 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 2794 SdHoareTripleChecker+Invalid, 4104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 213 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:53:28,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [294 Valid, 2794 Invalid, 4104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 3852 Invalid, 0 Unknown, 213 Unchecked, 1.9s Time] [2022-11-20 12:53:29,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-11-20 12:53:29,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 384. [2022-11-20 12:53:29,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 383 states have (on average 1.1488250652741514) internal successors, (440), 383 states have internal predecessors, (440), 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 12:53:29,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 440 transitions. [2022-11-20 12:53:29,005 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 440 transitions. Word has length 141 [2022-11-20 12:53:29,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:53:29,005 INFO L495 AbstractCegarLoop]: Abstraction has 384 states and 440 transitions. [2022-11-20 12:53:29,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.694915254237288) internal successors, (218), 59 states have internal predecessors, (218), 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 12:53:29,006 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 440 transitions. [2022-11-20 12:53:29,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-20 12:53:29,007 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:53:29,007 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:53:29,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-20 12:53:29,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:53:29,214 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:53:29,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:53:29,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1003421858, now seen corresponding path program 28 times [2022-11-20 12:53:29,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:53:29,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432836902] [2022-11-20 12:53:29,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:53:29,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:53:29,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 57 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:30,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:53:30,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432836902] [2022-11-20 12:53:30,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432836902] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:53:30,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384128647] [2022-11-20 12:53:30,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:53:30,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:53:30,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:53:30,901 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:53:30,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-20 12:53:31,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:53:31,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:53:31,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 112 conjunts are in the unsatisfiable core [2022-11-20 12:53:31,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:53:32,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:53:32,338 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-20 12:53:32,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:53:32,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 12:53:32,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:53:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 57 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:32,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:53:32,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:53:32,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:53:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 57 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:33,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384128647] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:53:33,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:53:33,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 59 [2022-11-20 12:53:33,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118905492] [2022-11-20 12:53:33,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:53:33,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-20 12:53:33,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:53:33,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-20 12:53:33,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3268, Unknown=0, NotChecked=0, Total=3422 [2022-11-20 12:53:33,051 INFO L87 Difference]: Start difference. First operand 384 states and 440 transitions. Second operand has 59 states, 59 states have (on average 3.7966101694915255) internal successors, (224), 59 states have internal predecessors, (224), 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 12:53:36,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:53:36,473 INFO L93 Difference]: Finished difference Result 476 states and 543 transitions. [2022-11-20 12:53:36,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-20 12:53:36,473 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.7966101694915255) internal successors, (224), 59 states have internal predecessors, (224), 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 143 [2022-11-20 12:53:36,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:53:36,475 INFO L225 Difference]: With dead ends: 476 [2022-11-20 12:53:36,475 INFO L226 Difference]: Without dead ends: 314 [2022-11-20 12:53:36,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 262 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=430, Invalid=7942, Unknown=0, NotChecked=0, Total=8372 [2022-11-20 12:53:36,476 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 424 mSDsluCounter, 2775 mSDsCounter, 0 mSdLazyCounter, 3989 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 2850 SdHoareTripleChecker+Invalid, 4124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 3989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:53:36,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 2850 Invalid, 4124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 3989 Invalid, 0 Unknown, 106 Unchecked, 1.9s Time] [2022-11-20 12:53:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-20 12:53:36,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 311. [2022-11-20 12:53:36,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.1419354838709677) internal successors, (354), 310 states have internal predecessors, (354), 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 12:53:36,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 354 transitions. [2022-11-20 12:53:36,480 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 354 transitions. Word has length 143 [2022-11-20 12:53:36,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:53:36,480 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 354 transitions. [2022-11-20 12:53:36,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.7966101694915255) internal successors, (224), 59 states have internal predecessors, (224), 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 12:53:36,481 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 354 transitions. [2022-11-20 12:53:36,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-11-20 12:53:36,482 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:53:36,482 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:53:36,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-20 12:53:36,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:53:36,690 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:53:36,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:53:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash 777801980, now seen corresponding path program 29 times [2022-11-20 12:53:36,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:53:36,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512306647] [2022-11-20 12:53:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:53:36,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:53:36,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 325 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:37,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:53:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512306647] [2022-11-20 12:53:37,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512306647] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:53:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346704073] [2022-11-20 12:53:37,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:53:37,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:53:37,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:53:37,928 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:53:37,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-20 12:53:38,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-20 12:53:38,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:53:38,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-20 12:53:38,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:53:38,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:53:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 378 proven. 597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:39,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:53:42,131 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 378 proven. 597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:42,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346704073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:53:42,131 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:53:42,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 85 [2022-11-20 12:53:42,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775285391] [2022-11-20 12:53:42,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:53:42,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-11-20 12:53:42,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:53:42,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-11-20 12:53:42,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=6273, Unknown=0, NotChecked=0, Total=7310 [2022-11-20 12:53:42,134 INFO L87 Difference]: Start difference. First operand 311 states and 354 transitions. Second operand has 86 states, 85 states have (on average 4.188235294117647) internal successors, (356), 86 states have internal predecessors, (356), 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 12:53:44,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:53:44,153 INFO L93 Difference]: Finished difference Result 337 states and 384 transitions. [2022-11-20 12:53:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-20 12:53:44,153 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 4.188235294117647) internal successors, (356), 86 states have internal predecessors, (356), 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 145 [2022-11-20 12:53:44,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:53:44,155 INFO L225 Difference]: With dead ends: 337 [2022-11-20 12:53:44,155 INFO L226 Difference]: Without dead ends: 337 [2022-11-20 12:53:44,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2227, Invalid=8693, Unknown=0, NotChecked=0, Total=10920 [2022-11-20 12:53:44,156 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 1874 mSDsluCounter, 1527 mSDsCounter, 0 mSdLazyCounter, 2434 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1874 SdHoareTripleChecker+Valid, 1610 SdHoareTripleChecker+Invalid, 2452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:53:44,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1874 Valid, 1610 Invalid, 2452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2434 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-20 12:53:44,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-11-20 12:53:44,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 256. [2022-11-20 12:53:44,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.1294117647058823) internal successors, (288), 255 states have internal predecessors, (288), 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 12:53:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 288 transitions. [2022-11-20 12:53:44,159 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 288 transitions. Word has length 145 [2022-11-20 12:53:44,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:53:44,160 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 288 transitions. [2022-11-20 12:53:44,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 4.188235294117647) internal successors, (356), 86 states have internal predecessors, (356), 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 12:53:44,160 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 288 transitions. [2022-11-20 12:53:44,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-20 12:53:44,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:53:44,162 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:53:44,175 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-11-20 12:53:44,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-20 12:53:44,369 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:53:44,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:53:44,369 INFO L85 PathProgramCache]: Analyzing trace with hash 504294472, now seen corresponding path program 30 times [2022-11-20 12:53:44,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:53:44,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439191870] [2022-11-20 12:53:44,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:53:44,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:53:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 61 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:46,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:53:46,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439191870] [2022-11-20 12:53:46,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439191870] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:53:46,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043129064] [2022-11-20 12:53:46,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:53:46,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:53:46,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:53:46,155 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:53:46,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-20 12:53:47,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-11-20 12:53:47,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:53:47,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-20 12:53:47,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:53:47,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:53:48,232 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-20 12:53:48,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:53:48,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:53:48,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 61 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:48,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:53:48,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:53:48,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:53:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1051 backedges. 61 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:48,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043129064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:53:48,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:53:48,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 62 [2022-11-20 12:53:48,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059878408] [2022-11-20 12:53:48,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:53:48,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-20 12:53:48,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:53:48,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-20 12:53:48,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=3621, Unknown=0, NotChecked=0, Total=3782 [2022-11-20 12:53:48,971 INFO L87 Difference]: Start difference. First operand 256 states and 288 transitions. Second operand has 62 states, 62 states have (on average 3.7903225806451615) internal successors, (235), 62 states have internal predecessors, (235), 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 12:53:53,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:53:53,830 INFO L93 Difference]: Finished difference Result 526 states and 598 transitions. [2022-11-20 12:53:53,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-11-20 12:53:53,830 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.7903225806451615) internal successors, (235), 62 states have internal predecessors, (235), 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 150 [2022-11-20 12:53:53,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:53:53,831 INFO L225 Difference]: With dead ends: 526 [2022-11-20 12:53:53,831 INFO L226 Difference]: Without dead ends: 263 [2022-11-20 12:53:53,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 274 SyntacticMatches, 3 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=682, Invalid=11750, Unknown=0, NotChecked=0, Total=12432 [2022-11-20 12:53:53,832 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 1050 mSDsluCounter, 3335 mSDsCounter, 0 mSdLazyCounter, 4792 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 3415 SdHoareTripleChecker+Invalid, 4972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 4792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:53:53,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1050 Valid, 3415 Invalid, 4972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 4792 Invalid, 0 Unknown, 134 Unchecked, 2.3s Time] [2022-11-20 12:53:53,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-11-20 12:53:53,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 260. [2022-11-20 12:53:53,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.1274131274131274) internal successors, (292), 259 states have internal predecessors, (292), 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 12:53:53,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 292 transitions. [2022-11-20 12:53:53,836 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 292 transitions. Word has length 150 [2022-11-20 12:53:53,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:53:53,837 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 292 transitions. [2022-11-20 12:53:53,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.7903225806451615) internal successors, (235), 62 states have internal predecessors, (235), 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 12:53:53,837 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 292 transitions. [2022-11-20 12:53:53,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-11-20 12:53:53,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:53:53,838 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:53:53,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-20 12:53:54,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-20 12:53:54,053 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:53:54,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:53:54,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1791170677, now seen corresponding path program 31 times [2022-11-20 12:53:54,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:53:54,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619639783] [2022-11-20 12:53:54,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:53:54,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:53:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 378 proven. 734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:55,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:53:55,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619639783] [2022-11-20 12:53:55,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619639783] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:53:55,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678308216] [2022-11-20 12:53:55,744 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:53:55,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:53:55,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:53:55,745 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:53:55,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-20 12:53:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:53:55,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-20 12:53:55,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:53:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 435 proven. 677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:57,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:53:58,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 12:53:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1112 backedges. 435 proven. 677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:53:58,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678308216] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:53:58,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:53:58,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 75 [2022-11-20 12:53:58,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511081524] [2022-11-20 12:53:58,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:53:58,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-20 12:53:58,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:53:58,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-20 12:53:58,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=5008, Unknown=0, NotChecked=0, Total=5700 [2022-11-20 12:53:58,987 INFO L87 Difference]: Start difference. First operand 260 states and 292 transitions. Second operand has 76 states, 75 states have (on average 4.1866666666666665) internal successors, (314), 76 states have internal predecessors, (314), 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 12:54:01,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:54:01,772 INFO L93 Difference]: Finished difference Result 284 states and 320 transitions. [2022-11-20 12:54:01,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-20 12:54:01,773 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 4.1866666666666665) internal successors, (314), 76 states have internal predecessors, (314), 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 154 [2022-11-20 12:54:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:54:01,775 INFO L225 Difference]: With dead ends: 284 [2022-11-20 12:54:01,775 INFO L226 Difference]: Without dead ends: 284 [2022-11-20 12:54:01,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 251 SyntacticMatches, 17 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3209 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1677, Invalid=7443, Unknown=0, NotChecked=0, Total=9120 [2022-11-20 12:54:01,775 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 1537 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 3127 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 2042 SdHoareTripleChecker+Invalid, 3136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 3127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:54:01,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1537 Valid, 2042 Invalid, 3136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 3127 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-20 12:54:01,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-20 12:54:01,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 272. [2022-11-20 12:54:01,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.1291512915129152) internal successors, (306), 271 states have internal predecessors, (306), 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 12:54:01,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 306 transitions. [2022-11-20 12:54:01,779 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 306 transitions. Word has length 154 [2022-11-20 12:54:01,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:54:01,780 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 306 transitions. [2022-11-20 12:54:01,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 4.1866666666666665) internal successors, (314), 76 states have internal predecessors, (314), 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 12:54:01,780 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 306 transitions. [2022-11-20 12:54:01,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-20 12:54:01,781 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:54:01,781 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:54:01,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-20 12:54:01,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-20 12:54:01,988 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:54:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:54:01,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1810341593, now seen corresponding path program 32 times [2022-11-20 12:54:01,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:54:01,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952467270] [2022-11-20 12:54:01,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:54:01,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:54:02,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:54:04,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 65 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:54:04,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:54:04,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952467270] [2022-11-20 12:54:04,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952467270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:54:04,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46732486] [2022-11-20 12:54:04,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:54:04,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:54:04,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:54:04,239 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:54:04,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-20 12:54:04,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:54:04,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:54:04,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 108 conjunts are in the unsatisfiable core [2022-11-20 12:54:04,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:54:05,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:54:05,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:54:05,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:54:08,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:54:08,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2022-11-20 12:54:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 435 proven. 758 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:54:08,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:54:12,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:54:12,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 12:54:12,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-11-20 12:54:12,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 435 proven. 758 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:54:12,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46732486] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:54:12,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:54:12,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 101 [2022-11-20 12:54:12,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641961088] [2022-11-20 12:54:12,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:54:12,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-20 12:54:12,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:54:12,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-20 12:54:12,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=9404, Unknown=0, NotChecked=0, Total=10100 [2022-11-20 12:54:12,935 INFO L87 Difference]: Start difference. First operand 272 states and 306 transitions. Second operand has 101 states, 101 states have (on average 4.00990099009901) internal successors, (405), 101 states have internal predecessors, (405), 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 12:54:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:54:17,060 INFO L93 Difference]: Finished difference Result 557 states and 637 transitions. [2022-11-20 12:54:17,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-20 12:54:17,061 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 4.00990099009901) internal successors, (405), 101 states have internal predecessors, (405), 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 159 [2022-11-20 12:54:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:54:17,062 INFO L225 Difference]: With dead ends: 557 [2022-11-20 12:54:17,063 INFO L226 Difference]: Without dead ends: 551 [2022-11-20 12:54:17,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 286 SyntacticMatches, 21 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3272 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1111, Invalid=14389, Unknown=0, NotChecked=0, Total=15500 [2022-11-20 12:54:17,064 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 507 mSDsluCounter, 3526 mSDsCounter, 0 mSdLazyCounter, 2634 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 3598 SdHoareTripleChecker+Invalid, 2901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-20 12:54:17,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 3598 Invalid, 2901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2634 Invalid, 0 Unknown, 246 Unchecked, 1.4s Time] [2022-11-20 12:54:17,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-11-20 12:54:17,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 434. [2022-11-20 12:54:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 1.1524249422632795) internal successors, (499), 433 states have internal predecessors, (499), 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 12:54:17,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 499 transitions. [2022-11-20 12:54:17,071 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 499 transitions. Word has length 159 [2022-11-20 12:54:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:54:17,072 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 499 transitions. [2022-11-20 12:54:17,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 4.00990099009901) internal successors, (405), 101 states have internal predecessors, (405), 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 12:54:17,072 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 499 transitions. [2022-11-20 12:54:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-11-20 12:54:17,074 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:54:17,074 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:54:17,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-20 12:54:17,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-20 12:54:17,280 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:54:17,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:54:17,281 INFO L85 PathProgramCache]: Analyzing trace with hash 921845375, now seen corresponding path program 33 times [2022-11-20 12:54:17,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:54:17,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355891226] [2022-11-20 12:54:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:54:17,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:54:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:54:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 65 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:54:19,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:54:19,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355891226] [2022-11-20 12:54:19,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355891226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:54:19,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331505064] [2022-11-20 12:54:19,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:54:19,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:54:19,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:54:19,212 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:54:19,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-20 12:54:20,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-11-20 12:54:20,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:54:20,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 122 conjunts are in the unsatisfiable core [2022-11-20 12:54:20,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:54:21,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:54:21,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-20 12:54:21,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:54:21,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 65 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:54:21,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:54:21,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:54:21,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:54:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1193 backedges. 65 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:54:22,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331505064] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:54:22,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:54:22,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 65 [2022-11-20 12:54:22,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578314138] [2022-11-20 12:54:22,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:54:22,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-20 12:54:22,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:54:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-20 12:54:22,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3992, Unknown=0, NotChecked=0, Total=4160 [2022-11-20 12:54:22,190 INFO L87 Difference]: Start difference. First operand 434 states and 499 transitions. Second operand has 65 states, 65 states have (on average 3.753846153846154) internal successors, (244), 65 states have internal predecessors, (244), 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 12:54:27,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:54:27,784 INFO L93 Difference]: Finished difference Result 554 states and 632 transitions. [2022-11-20 12:54:27,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-20 12:54:27,785 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.753846153846154) internal successors, (244), 65 states have internal predecessors, (244), 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 159 [2022-11-20 12:54:27,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:54:27,786 INFO L225 Difference]: With dead ends: 554 [2022-11-20 12:54:27,786 INFO L226 Difference]: Without dead ends: 354 [2022-11-20 12:54:27,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 291 SyntacticMatches, 3 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=686, Invalid=12654, Unknown=0, NotChecked=0, Total=13340 [2022-11-20 12:54:27,787 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 1104 mSDsluCounter, 4226 mSDsCounter, 0 mSdLazyCounter, 6069 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1104 SdHoareTripleChecker+Valid, 4311 SdHoareTripleChecker+Invalid, 6189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 6069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:54:27,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1104 Valid, 4311 Invalid, 6189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 6069 Invalid, 0 Unknown, 71 Unchecked, 2.9s Time] [2022-11-20 12:54:27,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-11-20 12:54:27,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 351. [2022-11-20 12:54:27,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.1428571428571428) internal successors, (400), 350 states have internal predecessors, (400), 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 12:54:27,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 400 transitions. [2022-11-20 12:54:27,790 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 400 transitions. Word has length 159 [2022-11-20 12:54:27,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:54:27,791 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 400 transitions. [2022-11-20 12:54:27,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.753846153846154) internal successors, (244), 65 states have internal predecessors, (244), 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 12:54:27,791 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 400 transitions. [2022-11-20 12:54:27,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-11-20 12:54:27,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:54:27,792 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:54:27,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-20 12:54:28,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-20 12:54:28,000 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:54:28,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:54:28,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1938243228, now seen corresponding path program 34 times [2022-11-20 12:54:28,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:54:28,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795507627] [2022-11-20 12:54:28,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:54:28,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:54:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:54:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 435 proven. 823 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:54:29,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:54:29,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795507627] [2022-11-20 12:54:29,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795507627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:54:29,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764600449] [2022-11-20 12:54:29,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:54:29,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:54:29,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:54:29,777 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:54:29,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-20 12:54:30,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:54:30,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:54:30,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-20 12:54:30,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:54:30,421 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:54:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 496 proven. 762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:54:31,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:54:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1258 backedges. 496 proven. 762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:54:34,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764600449] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:54:34,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:54:34,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 95 [2022-11-20 12:54:34,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236602452] [2022-11-20 12:54:34,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:54:34,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-20 12:54:34,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:54:34,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-20 12:54:34,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1290, Invalid=7830, Unknown=0, NotChecked=0, Total=9120 [2022-11-20 12:54:34,739 INFO L87 Difference]: Start difference. First operand 351 states and 400 transitions. Second operand has 96 states, 95 states have (on average 4.2105263157894735) internal successors, (400), 96 states have internal predecessors, (400), 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 12:54:37,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:54:37,192 INFO L93 Difference]: Finished difference Result 377 states and 430 transitions. [2022-11-20 12:54:37,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-20 12:54:37,193 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.2105263157894735) internal successors, (400), 96 states have internal predecessors, (400), 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 163 [2022-11-20 12:54:37,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:54:37,194 INFO L225 Difference]: With dead ends: 377 [2022-11-20 12:54:37,194 INFO L226 Difference]: Without dead ends: 377 [2022-11-20 12:54:37,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3623 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2753, Invalid=10819, Unknown=0, NotChecked=0, Total=13572 [2022-11-20 12:54:37,195 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 1385 mSDsluCounter, 1904 mSDsCounter, 0 mSdLazyCounter, 2964 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 1997 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:54:37,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1385 Valid, 1997 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2964 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-20 12:54:37,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-11-20 12:54:37,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 288. [2022-11-20 12:54:37,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.1289198606271778) internal successors, (324), 287 states have internal predecessors, (324), 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 12:54:37,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 324 transitions. [2022-11-20 12:54:37,199 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 324 transitions. Word has length 163 [2022-11-20 12:54:37,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:54:37,200 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 324 transitions. [2022-11-20 12:54:37,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.2105263157894735) internal successors, (400), 96 states have internal predecessors, (400), 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 12:54:37,200 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 324 transitions. [2022-11-20 12:54:37,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-20 12:54:37,201 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:54:37,201 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:54:37,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-20 12:54:37,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:54:37,412 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:54:37,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:54:37,412 INFO L85 PathProgramCache]: Analyzing trace with hash -2055679410, now seen corresponding path program 35 times [2022-11-20 12:54:37,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:54:37,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817705389] [2022-11-20 12:54:37,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:54:37,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:54:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:54:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 69 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:54:39,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:54:39,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817705389] [2022-11-20 12:54:39,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817705389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:54:39,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025621863] [2022-11-20 12:54:39,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:54:39,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:54:39,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:54:39,559 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:54:39,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-20 12:54:40,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-11-20 12:54:40,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:54:40,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 128 conjunts are in the unsatisfiable core [2022-11-20 12:54:40,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:54:41,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:54:41,579 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-20 12:54:41,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:54:41,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:54:41,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 69 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:54:41,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:54:42,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:54:42,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:54:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 69 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:54:42,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025621863] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:54:42,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:54:42,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 68 [2022-11-20 12:54:42,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636608182] [2022-11-20 12:54:42,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:54:42,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-11-20 12:54:42,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:54:42,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-11-20 12:54:42,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4381, Unknown=0, NotChecked=0, Total=4556 [2022-11-20 12:54:42,411 INFO L87 Difference]: Start difference. First operand 288 states and 324 transitions. Second operand has 68 states, 68 states have (on average 3.838235294117647) internal successors, (261), 68 states have internal predecessors, (261), 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 12:54:47,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:54:47,609 INFO L93 Difference]: Finished difference Result 506 states and 574 transitions. [2022-11-20 12:54:47,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-20 12:54:47,610 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.838235294117647) internal successors, (261), 68 states have internal predecessors, (261), 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 168 [2022-11-20 12:54:47,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:54:47,611 INFO L225 Difference]: With dead ends: 506 [2022-11-20 12:54:47,611 INFO L226 Difference]: Without dead ends: 295 [2022-11-20 12:54:47,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 308 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=586, Invalid=12070, Unknown=0, NotChecked=0, Total=12656 [2022-11-20 12:54:47,612 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 694 mSDsluCounter, 4191 mSDsCounter, 0 mSdLazyCounter, 5887 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 4281 SdHoareTripleChecker+Invalid, 6193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 5887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:54:47,612 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [694 Valid, 4281 Invalid, 6193 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [41 Valid, 5887 Invalid, 0 Unknown, 265 Unchecked, 2.7s Time] [2022-11-20 12:54:47,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-11-20 12:54:47,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2022-11-20 12:54:47,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.127147766323024) internal successors, (328), 291 states have internal predecessors, (328), 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 12:54:47,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 328 transitions. [2022-11-20 12:54:47,617 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 328 transitions. Word has length 168 [2022-11-20 12:54:47,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:54:47,617 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 328 transitions. [2022-11-20 12:54:47,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.838235294117647) internal successors, (261), 68 states have internal predecessors, (261), 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 12:54:47,617 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 328 transitions. [2022-11-20 12:54:47,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-11-20 12:54:47,618 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:54:47,619 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:54:47,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-20 12:54:47,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-11-20 12:54:47,827 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:54:47,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:54:47,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1289069265, now seen corresponding path program 36 times [2022-11-20 12:54:47,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:54:47,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280918161] [2022-11-20 12:54:47,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:54:47,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:54:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:54:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 496 proven. 917 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:54:49,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:54:49,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280918161] [2022-11-20 12:54:49,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280918161] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:54:49,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192360178] [2022-11-20 12:54:49,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:54:49,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:54:49,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:54:49,489 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:54:49,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-20 12:54:51,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-11-20 12:54:51,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:54:51,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 654 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-20 12:54:51,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:54:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 561 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:54:53,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:54:55,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-20 12:54:55,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 561 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:54:55,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192360178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:54:55,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:54:55,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 101 [2022-11-20 12:54:55,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679336367] [2022-11-20 12:54:55,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:54:55,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-11-20 12:54:55,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:54:55,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-11-20 12:54:55,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1564, Invalid=8738, Unknown=0, NotChecked=0, Total=10302 [2022-11-20 12:54:55,890 INFO L87 Difference]: Start difference. First operand 292 states and 328 transitions. Second operand has 102 states, 101 states have (on average 4.316831683168317) internal successors, (436), 102 states have internal predecessors, (436), 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 12:54:57,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:54:57,847 INFO L93 Difference]: Finished difference Result 316 states and 356 transitions. [2022-11-20 12:54:57,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-20 12:54:57,848 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 4.316831683168317) internal successors, (436), 102 states have internal predecessors, (436), 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 172 [2022-11-20 12:54:57,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:54:57,849 INFO L225 Difference]: With dead ends: 316 [2022-11-20 12:54:57,849 INFO L226 Difference]: Without dead ends: 316 [2022-11-20 12:54:57,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 263 SyntacticMatches, 19 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5766 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2980, Invalid=12272, Unknown=0, NotChecked=0, Total=15252 [2022-11-20 12:54:57,850 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 2596 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 1967 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2596 SdHoareTripleChecker+Valid, 1481 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:54:57,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2596 Valid, 1481 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1967 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-20 12:54:57,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-11-20 12:54:57,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 304. [2022-11-20 12:54:57,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.1287128712871286) internal successors, (342), 303 states have internal predecessors, (342), 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 12:54:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 342 transitions. [2022-11-20 12:54:57,853 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 342 transitions. Word has length 172 [2022-11-20 12:54:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:54:57,853 INFO L495 AbstractCegarLoop]: Abstraction has 304 states and 342 transitions. [2022-11-20 12:54:57,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 101 states have (on average 4.316831683168317) internal successors, (436), 102 states have internal predecessors, (436), 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 12:54:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 342 transitions. [2022-11-20 12:54:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-11-20 12:54:57,855 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:54:57,855 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:54:57,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-20 12:54:58,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:54:58,064 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:54:58,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:54:58,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1157562195, now seen corresponding path program 37 times [2022-11-20 12:54:58,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:54:58,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931364263] [2022-11-20 12:54:58,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:54:58,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:54:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:55:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 73 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:00,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:55:00,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931364263] [2022-11-20 12:55:00,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931364263] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:55:00,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008045568] [2022-11-20 12:55:00,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:55:00,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:55:00,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:55:00,571 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:55:00,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-20 12:55:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:55:00,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 672 conjuncts, 134 conjunts are in the unsatisfiable core [2022-11-20 12:55:00,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:55:01,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:55:02,231 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-20 12:55:02,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:55:02,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:55:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 73 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:02,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:55:02,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:55:02,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:55:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1504 backedges. 73 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:03,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008045568] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:55:03,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:55:03,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 71 [2022-11-20 12:55:03,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235802065] [2022-11-20 12:55:03,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:55:03,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-20 12:55:03,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:55:03,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-20 12:55:03,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=4788, Unknown=0, NotChecked=0, Total=4970 [2022-11-20 12:55:03,092 INFO L87 Difference]: Start difference. First operand 304 states and 342 transitions. Second operand has 71 states, 71 states have (on average 3.859154929577465) internal successors, (274), 71 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:55:08,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:55:08,431 INFO L93 Difference]: Finished difference Result 530 states and 602 transitions. [2022-11-20 12:55:08,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-20 12:55:08,432 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.859154929577465) internal successors, (274), 71 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2022-11-20 12:55:08,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:55:08,433 INFO L225 Difference]: With dead ends: 530 [2022-11-20 12:55:08,434 INFO L226 Difference]: Without dead ends: 311 [2022-11-20 12:55:08,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 325 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=548, Invalid=12334, Unknown=0, NotChecked=0, Total=12882 [2022-11-20 12:55:08,435 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 745 mSDsluCounter, 4429 mSDsCounter, 0 mSdLazyCounter, 6334 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 4524 SdHoareTripleChecker+Invalid, 6466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 6334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-20 12:55:08,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [745 Valid, 4524 Invalid, 6466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 6334 Invalid, 0 Unknown, 92 Unchecked, 2.9s Time] [2022-11-20 12:55:08,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-11-20 12:55:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 308. [2022-11-20 12:55:08,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.1270358306188926) internal successors, (346), 307 states have internal predecessors, (346), 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 12:55:08,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 346 transitions. [2022-11-20 12:55:08,439 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 346 transitions. Word has length 177 [2022-11-20 12:55:08,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:55:08,440 INFO L495 AbstractCegarLoop]: Abstraction has 308 states and 346 transitions. [2022-11-20 12:55:08,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.859154929577465) internal successors, (274), 71 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 12:55:08,440 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 346 transitions. [2022-11-20 12:55:08,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-11-20 12:55:08,441 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:55:08,441 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:55:08,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-11-20 12:55:08,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:55:08,648 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:55:08,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:55:08,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1298066896, now seen corresponding path program 38 times [2022-11-20 12:55:08,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:55:08,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009127297] [2022-11-20 12:55:08,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:55:08,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:55:08,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:55:10,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 561 proven. 1016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:10,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:55:10,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009127297] [2022-11-20 12:55:10,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009127297] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:55:10,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896461800] [2022-11-20 12:55:10,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:55:10,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:55:10,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:55:10,978 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:55:10,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-20 12:55:11,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:55:11,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:55:11,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-20 12:55:11,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:55:11,293 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:55:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 630 proven. 947 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:12,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:55:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1577 backedges. 630 proven. 947 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:15,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896461800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:55:15,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:55:15,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 107 [2022-11-20 12:55:15,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470670471] [2022-11-20 12:55:15,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:55:15,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-11-20 12:55:15,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:55:15,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-11-20 12:55:15,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=10034, Unknown=0, NotChecked=0, Total=11556 [2022-11-20 12:55:15,962 INFO L87 Difference]: Start difference. First operand 308 states and 346 transitions. Second operand has 108 states, 107 states have (on average 4.168224299065421) internal successors, (446), 108 states have internal predecessors, (446), 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 12:55:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:55:19,610 INFO L93 Difference]: Finished difference Result 332 states and 374 transitions. [2022-11-20 12:55:19,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-20 12:55:19,611 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 4.168224299065421) internal successors, (446), 108 states have internal predecessors, (446), 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 181 [2022-11-20 12:55:19,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:55:19,612 INFO L225 Difference]: With dead ends: 332 [2022-11-20 12:55:19,613 INFO L226 Difference]: Without dead ends: 332 [2022-11-20 12:55:19,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4810 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=3288, Invalid=13742, Unknown=0, NotChecked=0, Total=17030 [2022-11-20 12:55:19,614 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 2380 mSDsluCounter, 2556 mSDsCounter, 0 mSdLazyCounter, 4010 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2380 SdHoareTripleChecker+Valid, 2659 SdHoareTripleChecker+Invalid, 4015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 4010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-20 12:55:19,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2380 Valid, 2659 Invalid, 4015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 4010 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-20 12:55:19,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-11-20 12:55:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 320. [2022-11-20 12:55:19,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.128526645768025) internal successors, (360), 319 states have internal predecessors, (360), 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 12:55:19,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 360 transitions. [2022-11-20 12:55:19,618 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 360 transitions. Word has length 181 [2022-11-20 12:55:19,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:55:19,618 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 360 transitions. [2022-11-20 12:55:19,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 4.168224299065421) internal successors, (446), 108 states have internal predecessors, (446), 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 12:55:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 360 transitions. [2022-11-20 12:55:19,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-11-20 12:55:19,620 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:55:19,620 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:55:19,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-20 12:55:19,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-11-20 12:55:19,827 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:55:19,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:55:19,827 INFO L85 PathProgramCache]: Analyzing trace with hash -769830060, now seen corresponding path program 39 times [2022-11-20 12:55:19,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:55:19,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969157966] [2022-11-20 12:55:19,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:55:19,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:55:19,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:55:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 77 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:22,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:55:22,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969157966] [2022-11-20 12:55:22,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969157966] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:55:22,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054997723] [2022-11-20 12:55:22,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:55:22,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:55:22,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:55:22,359 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:55:22,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-20 12:55:24,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-11-20 12:55:24,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:55:24,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 140 conjunts are in the unsatisfiable core [2022-11-20 12:55:24,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:55:25,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:55:25,742 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-20 12:55:25,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:55:25,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:55:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 77 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:25,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:55:26,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:55:26,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:55:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1673 backedges. 77 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:26,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054997723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:55:26,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:55:26,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 74 [2022-11-20 12:55:26,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377453398] [2022-11-20 12:55:26,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:55:26,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-20 12:55:26,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:55:26,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-20 12:55:26,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=5213, Unknown=0, NotChecked=0, Total=5402 [2022-11-20 12:55:26,660 INFO L87 Difference]: Start difference. First operand 320 states and 360 transitions. Second operand has 74 states, 74 states have (on average 3.8783783783783785) internal successors, (287), 74 states have internal predecessors, (287), 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 12:55:34,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:55:34,008 INFO L93 Difference]: Finished difference Result 662 states and 754 transitions. [2022-11-20 12:55:34,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-20 12:55:34,014 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.8783783783783785) internal successors, (287), 74 states have internal predecessors, (287), 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 186 [2022-11-20 12:55:34,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:55:34,016 INFO L225 Difference]: With dead ends: 662 [2022-11-20 12:55:34,017 INFO L226 Difference]: Without dead ends: 327 [2022-11-20 12:55:34,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 342 SyntacticMatches, 3 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2493 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=830, Invalid=17530, Unknown=0, NotChecked=0, Total=18360 [2022-11-20 12:55:34,018 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 1048 mSDsluCounter, 5386 mSDsCounter, 0 mSdLazyCounter, 7717 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 5486 SdHoareTripleChecker+Invalid, 7906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 7717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-20 12:55:34,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1048 Valid, 5486 Invalid, 7906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 7717 Invalid, 0 Unknown, 132 Unchecked, 3.7s Time] [2022-11-20 12:55:34,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-11-20 12:55:34,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 324. [2022-11-20 12:55:34,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.1269349845201238) internal successors, (364), 323 states have internal predecessors, (364), 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 12:55:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 364 transitions. [2022-11-20 12:55:34,022 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 364 transitions. Word has length 186 [2022-11-20 12:55:34,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:55:34,022 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 364 transitions. [2022-11-20 12:55:34,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.8783783783783785) internal successors, (287), 74 states have internal predecessors, (287), 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 12:55:34,022 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 364 transitions. [2022-11-20 12:55:34,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-11-20 12:55:34,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:55:34,024 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:55:34,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-20 12:55:34,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-11-20 12:55:34,232 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:55:34,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:55:34,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1474942697, now seen corresponding path program 40 times [2022-11-20 12:55:34,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:55:34,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102821496] [2022-11-20 12:55:34,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:55:34,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:55:34,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:55:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 630 proven. 1120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:36,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:55:36,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102821496] [2022-11-20 12:55:36,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102821496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:55:36,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367736981] [2022-11-20 12:55:36,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:55:36,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:55:36,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:55:36,261 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:55:36,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-20 12:55:37,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:55:37,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:55:37,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-20 12:55:37,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:55:37,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:55:38,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 703 proven. 1047 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:38,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:55:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1750 backedges. 703 proven. 1047 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:42,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367736981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:55:42,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:55:42,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 110 [2022-11-20 12:55:42,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572026121] [2022-11-20 12:55:42,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:55:42,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-11-20 12:55:42,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:55:42,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-11-20 12:55:42,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1722, Invalid=10488, Unknown=0, NotChecked=0, Total=12210 [2022-11-20 12:55:42,814 INFO L87 Difference]: Start difference. First operand 324 states and 364 transitions. Second operand has 111 states, 110 states have (on average 4.254545454545455) internal successors, (468), 111 states have internal predecessors, (468), 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 12:55:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:55:46,500 INFO L93 Difference]: Finished difference Result 348 states and 392 transitions. [2022-11-20 12:55:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-20 12:55:46,501 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 4.254545454545455) internal successors, (468), 111 states have internal predecessors, (468), 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 190 [2022-11-20 12:55:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:55:46,503 INFO L225 Difference]: With dead ends: 348 [2022-11-20 12:55:46,503 INFO L226 Difference]: Without dead ends: 348 [2022-11-20 12:55:46,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4955 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=3647, Invalid=14443, Unknown=0, NotChecked=0, Total=18090 [2022-11-20 12:55:46,504 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 1190 mSDsluCounter, 2851 mSDsCounter, 0 mSdLazyCounter, 4453 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1190 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 4477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 4453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-20 12:55:46,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1190 Valid, 2959 Invalid, 4477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 4453 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-20 12:55:46,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-11-20 12:55:46,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 336. [2022-11-20 12:55:46,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 1.128358208955224) internal successors, (378), 335 states have internal predecessors, (378), 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 12:55:46,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 378 transitions. [2022-11-20 12:55:46,509 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 378 transitions. Word has length 190 [2022-11-20 12:55:46,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:55:46,509 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 378 transitions. [2022-11-20 12:55:46,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 4.254545454545455) internal successors, (468), 111 states have internal predecessors, (468), 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 12:55:46,510 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 378 transitions. [2022-11-20 12:55:46,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-11-20 12:55:46,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:55:46,511 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:55:46,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-20 12:55:46,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:55:46,715 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:55:46,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:55:46,716 INFO L85 PathProgramCache]: Analyzing trace with hash 311784653, now seen corresponding path program 41 times [2022-11-20 12:55:46,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:55:46,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037430948] [2022-11-20 12:55:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:55:46,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:55:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:55:49,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 81 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:49,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:55:49,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037430948] [2022-11-20 12:55:49,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037430948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:55:49,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041247378] [2022-11-20 12:55:49,748 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:55:49,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:55:49,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:55:49,749 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:55:49,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-20 12:55:50,750 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-11-20 12:55:50,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:55:50,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 146 conjunts are in the unsatisfiable core [2022-11-20 12:55:50,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:55:52,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:55:52,321 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-20 12:55:52,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 21 [2022-11-20 12:55:52,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:55:52,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 81 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:52,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:55:52,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:55:52,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-20 12:55:53,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1851 backedges. 81 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:55:53,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041247378] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:55:53,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:55:53,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 77 [2022-11-20 12:55:53,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315596596] [2022-11-20 12:55:53,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:55:53,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-20 12:55:53,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:55:53,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-20 12:55:53,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=5656, Unknown=0, NotChecked=0, Total=5852 [2022-11-20 12:55:53,335 INFO L87 Difference]: Start difference. First operand 336 states and 378 transitions. Second operand has 77 states, 77 states have (on average 3.896103896103896) internal successors, (300), 77 states have internal predecessors, (300), 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 12:56:01,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:56:01,132 INFO L93 Difference]: Finished difference Result 696 states and 793 transitions. [2022-11-20 12:56:01,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-11-20 12:56:01,132 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.896103896103896) internal successors, (300), 77 states have internal predecessors, (300), 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 195 [2022-11-20 12:56:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:56:01,133 INFO L225 Difference]: With dead ends: 696 [2022-11-20 12:56:01,133 INFO L226 Difference]: Without dead ends: 343 [2022-11-20 12:56:01,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 359 SyntacticMatches, 3 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 2720 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=867, Invalid=19155, Unknown=0, NotChecked=0, Total=20022 [2022-11-20 12:56:01,135 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1396 mSDsluCounter, 5549 mSDsCounter, 0 mSdLazyCounter, 7963 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 5654 SdHoareTripleChecker+Invalid, 8194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 7963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:56:01,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1396 Valid, 5654 Invalid, 8194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 7963 Invalid, 0 Unknown, 171 Unchecked, 3.8s Time] [2022-11-20 12:56:01,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-20 12:56:01,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 340. [2022-11-20 12:56:01,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.126843657817109) internal successors, (382), 339 states have internal predecessors, (382), 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 12:56:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 382 transitions. [2022-11-20 12:56:01,140 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 382 transitions. Word has length 195 [2022-11-20 12:56:01,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:56:01,140 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 382 transitions. [2022-11-20 12:56:01,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.896103896103896) internal successors, (300), 77 states have internal predecessors, (300), 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 12:56:01,140 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 382 transitions. [2022-11-20 12:56:01,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-20 12:56:01,141 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:56:01,142 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:56:01,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-20 12:56:01,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:56:01,350 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:56:01,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:56:01,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1565693334, now seen corresponding path program 42 times [2022-11-20 12:56:01,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:56:01,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330735924] [2022-11-20 12:56:01,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:56:01,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:56:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:56:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 703 proven. 1229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:56:04,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:56:04,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330735924] [2022-11-20 12:56:04,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330735924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:56:04,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996553012] [2022-11-20 12:56:04,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-20 12:56:04,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:56:04,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:56:04,347 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:56:04,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-20 12:56:07,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-11-20 12:56:07,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:56:07,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-20 12:56:07,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:56:07,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-20 12:56:08,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-11-20 12:56:08,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:56:08,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-11-20 12:56:10,522 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:56:10,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-20 12:56:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 326 proven. 431 refuted. 0 times theorem prover too weak. 1175 trivial. 0 not checked. [2022-11-20 12:56:10,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:56:12,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-20 12:56:12,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2022-11-20 12:56:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 432 proven. 325 refuted. 0 times theorem prover too weak. 1175 trivial. 0 not checked. [2022-11-20 12:56:15,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996553012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:56:15,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:56:15,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 19, 19] total 82 [2022-11-20 12:56:15,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994187819] [2022-11-20 12:56:15,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:56:15,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-20 12:56:15,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:56:15,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-20 12:56:15,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=892, Invalid=5914, Unknown=0, NotChecked=0, Total=6806 [2022-11-20 12:56:15,202 INFO L87 Difference]: Start difference. First operand 340 states and 382 transitions. Second operand has 83 states, 82 states have (on average 3.7195121951219514) internal successors, (305), 83 states have internal predecessors, (305), 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 12:56:29,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:56:29,671 INFO L93 Difference]: Finished difference Result 507 states and 570 transitions. [2022-11-20 12:56:29,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-20 12:56:29,672 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 3.7195121951219514) internal successors, (305), 83 states have internal predecessors, (305), 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 199 [2022-11-20 12:56:29,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:56:29,674 INFO L225 Difference]: With dead ends: 507 [2022-11-20 12:56:29,674 INFO L226 Difference]: Without dead ends: 507 [2022-11-20 12:56:29,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 364 SyntacticMatches, 65 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10614 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=3401, Invalid=20161, Unknown=0, NotChecked=0, Total=23562 [2022-11-20 12:56:29,676 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 261 mSDsluCounter, 2762 mSDsCounter, 0 mSdLazyCounter, 1284 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 2851 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-20 12:56:29,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 2851 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1284 Invalid, 0 Unknown, 181 Unchecked, 0.8s Time] [2022-11-20 12:56:29,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-11-20 12:56:29,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 240. [2022-11-20 12:56:29,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.096234309623431) internal successors, (262), 239 states have internal predecessors, (262), 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 12:56:29,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 262 transitions. [2022-11-20 12:56:29,680 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 262 transitions. Word has length 199 [2022-11-20 12:56:29,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:56:29,681 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 262 transitions. [2022-11-20 12:56:29,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 3.7195121951219514) internal successors, (305), 83 states have internal predecessors, (305), 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 12:56:29,681 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 262 transitions. [2022-11-20 12:56:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-11-20 12:56:29,682 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:56:29,682 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:56:29,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-20 12:56:29,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-11-20 12:56:29,887 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:56:29,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:56:29,887 INFO L85 PathProgramCache]: Analyzing trace with hash 586898666, now seen corresponding path program 43 times [2022-11-20 12:56:29,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:56:29,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210090029] [2022-11-20 12:56:29,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:56:29,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:56:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:56:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 703 proven. 1229 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:56:32,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:56:32,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210090029] [2022-11-20 12:56:32,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210090029] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:56:32,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68386688] [2022-11-20 12:56:32,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-20 12:56:32,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:56:32,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:56:32,712 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:56:32,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-20 12:56:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:56:33,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-20 12:56:33,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:56:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 780 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:56:34,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:56:36,532 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-11-20 12:56:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1932 backedges. 780 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:56:37,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68386688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:56:37,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:56:37,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 95 [2022-11-20 12:56:37,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116795822] [2022-11-20 12:56:37,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:56:37,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-20 12:56:37,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:56:37,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-20 12:56:37,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1107, Invalid=8013, Unknown=0, NotChecked=0, Total=9120 [2022-11-20 12:56:37,550 INFO L87 Difference]: Start difference. First operand 240 states and 262 transitions. Second operand has 96 states, 95 states have (on average 4.231578947368421) internal successors, (402), 96 states have internal predecessors, (402), 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 12:56:41,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:56:41,719 INFO L93 Difference]: Finished difference Result 258 states and 282 transitions. [2022-11-20 12:56:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-20 12:56:41,720 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 4.231578947368421) internal successors, (402), 96 states have internal predecessors, (402), 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 199 [2022-11-20 12:56:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:56:41,721 INFO L225 Difference]: With dead ends: 258 [2022-11-20 12:56:41,721 INFO L226 Difference]: Without dead ends: 258 [2022-11-20 12:56:41,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 326 SyntacticMatches, 22 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5314 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=2652, Invalid=11868, Unknown=0, NotChecked=0, Total=14520 [2022-11-20 12:56:41,722 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 2586 mSDsluCounter, 3047 mSDsCounter, 0 mSdLazyCounter, 4707 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2586 SdHoareTripleChecker+Valid, 3160 SdHoareTripleChecker+Invalid, 4733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 4707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-20 12:56:41,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2586 Valid, 3160 Invalid, 4733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 4707 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-20 12:56:41,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-11-20 12:56:41,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 247. [2022-11-20 12:56:41,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.0975609756097562) internal successors, (270), 246 states have internal predecessors, (270), 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 12:56:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 270 transitions. [2022-11-20 12:56:41,724 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 270 transitions. Word has length 199 [2022-11-20 12:56:41,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:56:41,725 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 270 transitions. [2022-11-20 12:56:41,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 4.231578947368421) internal successors, (402), 96 states have internal predecessors, (402), 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 12:56:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 270 transitions. [2022-11-20 12:56:41,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-11-20 12:56:41,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:56:41,726 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:56:41,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-11-20 12:56:41,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-11-20 12:56:41,931 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:56:41,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:56:41,931 INFO L85 PathProgramCache]: Analyzing trace with hash 420554996, now seen corresponding path program 44 times [2022-11-20 12:56:41,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:56:41,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785023098] [2022-11-20 12:56:41,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:56:41,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:56:41,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:56:44,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2038 backedges. 85 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:56:44,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:56:44,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785023098] [2022-11-20 12:56:44,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785023098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:56:44,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321082183] [2022-11-20 12:56:44,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 12:56:44,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:56:44,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:56:44,543 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:56:44,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-11-20 12:56:44,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 12:56:44,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:56:44,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 135 conjunts are in the unsatisfiable core [2022-11-20 12:56:44,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:56:46,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:56:53,407 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-20 12:56:53,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 19 [2022-11-20 12:56:53,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2038 backedges. 780 proven. 1257 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:56:53,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:56:58,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-11-20 12:56:58,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-20 12:56:58,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-11-20 12:56:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2038 backedges. 780 proven. 1258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:56:59,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321082183] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:56:59,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:56:59,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 52, 50] total 128 [2022-11-20 12:56:59,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489629645] [2022-11-20 12:56:59,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:56:59,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-11-20 12:56:59,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:56:59,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-11-20 12:56:59,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1068, Invalid=15187, Unknown=1, NotChecked=0, Total=16256 [2022-11-20 12:56:59,787 INFO L87 Difference]: Start difference. First operand 247 states and 270 transitions. Second operand has 128 states, 128 states have (on average 4.0625) internal successors, (520), 128 states have internal predecessors, (520), 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 12:57:13,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:57:13,643 INFO L93 Difference]: Finished difference Result 582 states and 648 transitions. [2022-11-20 12:57:13,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-11-20 12:57:13,644 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 4.0625) internal successors, (520), 128 states have internal predecessors, (520), 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 204 [2022-11-20 12:57:13,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:57:13,646 INFO L225 Difference]: With dead ends: 582 [2022-11-20 12:57:13,646 INFO L226 Difference]: Without dead ends: 579 [2022-11-20 12:57:13,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 368 SyntacticMatches, 25 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5475 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=1721, Invalid=23716, Unknown=3, NotChecked=0, Total=25440 [2022-11-20 12:57:13,649 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 627 mSDsluCounter, 4949 mSDsCounter, 0 mSdLazyCounter, 3763 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 5040 SdHoareTripleChecker+Invalid, 4198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 409 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:57:13,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [627 Valid, 5040 Invalid, 4198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3763 Invalid, 0 Unknown, 409 Unchecked, 2.2s Time] [2022-11-20 12:57:13,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-11-20 12:57:13,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 462. [2022-11-20 12:57:13,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.143167028199566) internal successors, (527), 461 states have internal predecessors, (527), 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 12:57:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 527 transitions. [2022-11-20 12:57:13,654 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 527 transitions. Word has length 204 [2022-11-20 12:57:13,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:57:13,655 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 527 transitions. [2022-11-20 12:57:13,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 4.0625) internal successors, (520), 128 states have internal predecessors, (520), 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 12:57:13,655 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 527 transitions. [2022-11-20 12:57:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-20 12:57:13,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:57:13,656 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:57:13,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-11-20 12:57:13,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:57:13,858 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:57:13,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:57:13,858 INFO L85 PathProgramCache]: Analyzing trace with hash -626842505, now seen corresponding path program 45 times [2022-11-20 12:57:13,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:57:13,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418546984] [2022-11-20 12:57:13,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:57:13,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:57:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:57:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2040 backedges. 45 proven. 1995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:57:17,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:57:17,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418546984] [2022-11-20 12:57:17,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418546984] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:57:17,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446918298] [2022-11-20 12:57:17,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 12:57:17,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:57:17,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:57:17,346 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:57:17,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-11-20 12:57:20,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-20 12:57:20,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:57:20,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 163 conjunts are in the unsatisfiable core [2022-11-20 12:57:20,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:57:22,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:57:23,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 12:57:23,027 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:57:23,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 28 [2022-11-20 12:57:27,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 12:57:27,635 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:57:27,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-11-20 12:57:27,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2040 backedges. 45 proven. 1995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:57:27,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:57:31,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 34 [2022-11-20 12:57:31,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 53 [2022-11-20 12:57:35,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2040 backedges. 45 proven. 1995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:57:35,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446918298] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:57:35,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:57:35,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 56, 55] total 157 [2022-11-20 12:57:35,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345658186] [2022-11-20 12:57:35,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:57:35,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-11-20 12:57:35,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:57:35,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-11-20 12:57:35,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=23991, Unknown=0, NotChecked=0, Total=24492 [2022-11-20 12:57:35,713 INFO L87 Difference]: Start difference. First operand 462 states and 527 transitions. Second operand has 157 states, 157 states have (on average 3.7643312101910826) internal successors, (591), 157 states have internal predecessors, (591), 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 12:57:42,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:57:42,992 INFO L93 Difference]: Finished difference Result 572 states and 657 transitions. [2022-11-20 12:57:42,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-20 12:57:42,993 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 3.7643312101910826) internal successors, (591), 157 states have internal predecessors, (591), 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 206 [2022-11-20 12:57:42,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:57:42,996 INFO L225 Difference]: With dead ends: 572 [2022-11-20 12:57:42,996 INFO L226 Difference]: Without dead ends: 572 [2022-11-20 12:57:42,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 310 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7137 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=767, Invalid=34765, Unknown=0, NotChecked=0, Total=35532 [2022-11-20 12:57:42,999 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 81 mSDsluCounter, 3912 mSDsCounter, 0 mSdLazyCounter, 5661 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 3960 SdHoareTripleChecker+Invalid, 7786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 5661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2100 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-20 12:57:42,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 3960 Invalid, 7786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 5661 Invalid, 0 Unknown, 2100 Unchecked, 3.2s Time] [2022-11-20 12:57:43,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-11-20 12:57:43,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 569. [2022-11-20 12:57:43,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 1.1514084507042253) internal successors, (654), 568 states have internal predecessors, (654), 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 12:57:43,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 654 transitions. [2022-11-20 12:57:43,005 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 654 transitions. Word has length 206 [2022-11-20 12:57:43,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:57:43,006 INFO L495 AbstractCegarLoop]: Abstraction has 569 states and 654 transitions. [2022-11-20 12:57:43,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 3.7643312101910826) internal successors, (591), 157 states have internal predecessors, (591), 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 12:57:43,006 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 654 transitions. [2022-11-20 12:57:43,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-11-20 12:57:43,008 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:57:43,008 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:57:43,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-11-20 12:57:43,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-11-20 12:57:43,215 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:57:43,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:57:43,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1954016529, now seen corresponding path program 46 times [2022-11-20 12:57:43,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:57:43,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115648518] [2022-11-20 12:57:43,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:57:43,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:57:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:57:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2040 backedges. 45 proven. 1995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:57:46,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:57:46,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115648518] [2022-11-20 12:57:46,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115648518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:57:46,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199900930] [2022-11-20 12:57:46,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 12:57:46,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:57:46,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:57:46,459 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:57:46,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-11-20 12:57:47,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 12:57:47,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:57:47,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 160 conjunts are in the unsatisfiable core [2022-11-20 12:57:47,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:57:49,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:57:49,986 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:57:49,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-11-20 12:57:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2040 backedges. 87 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:57:51,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 12:57:55,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2022-11-20 12:57:55,453 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:57:55,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 53 [2022-11-20 12:57:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2040 backedges. 45 proven. 1995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:57:59,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199900930] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 12:57:59,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 12:57:59,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 52, 54] total 153 [2022-11-20 12:57:59,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824551818] [2022-11-20 12:57:59,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 12:57:59,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-11-20 12:57:59,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 12:57:59,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-11-20 12:57:59,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=22795, Unknown=0, NotChecked=0, Total=23256 [2022-11-20 12:57:59,531 INFO L87 Difference]: Start difference. First operand 569 states and 654 transitions. Second operand has 153 states, 153 states have (on average 3.934640522875817) internal successors, (602), 153 states have internal predecessors, (602), 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 12:58:34,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 12:58:34,674 INFO L93 Difference]: Finished difference Result 1273 states and 1449 transitions. [2022-11-20 12:58:34,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-11-20 12:58:34,675 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 3.934640522875817) internal successors, (602), 153 states have internal predecessors, (602), 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 206 [2022-11-20 12:58:34,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 12:58:34,676 INFO L225 Difference]: With dead ends: 1273 [2022-11-20 12:58:34,676 INFO L226 Difference]: Without dead ends: 775 [2022-11-20 12:58:34,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 313 SyntacticMatches, 1 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14592 ImplicationChecksByTransitivity, 30.1s TimeCoverageRelationStatistics Valid=2511, Invalid=84809, Unknown=0, NotChecked=0, Total=87320 [2022-11-20 12:58:34,679 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 618 mSDsluCounter, 12936 mSDsCounter, 0 mSdLazyCounter, 29623 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 13080 SdHoareTripleChecker+Invalid, 29890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 29623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2022-11-20 12:58:34,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 13080 Invalid, 29890 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [146 Valid, 29623 Invalid, 0 Unknown, 121 Unchecked, 16.1s Time] [2022-11-20 12:58:34,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-11-20 12:58:34,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 604. [2022-11-20 12:58:34,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 1.1409618573797677) internal successors, (688), 603 states have internal predecessors, (688), 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 12:58:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 688 transitions. [2022-11-20 12:58:34,686 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 688 transitions. Word has length 206 [2022-11-20 12:58:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 12:58:34,687 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 688 transitions. [2022-11-20 12:58:34,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 3.934640522875817) internal successors, (602), 153 states have internal predecessors, (602), 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 12:58:34,687 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 688 transitions. [2022-11-20 12:58:34,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-11-20 12:58:34,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 12:58:34,689 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 19, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 12:58:34,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-11-20 12:58:34,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:58:34,895 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-20 12:58:34,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 12:58:34,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1956916486, now seen corresponding path program 47 times [2022-11-20 12:58:34,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 12:58:34,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453219087] [2022-11-20 12:58:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 12:58:34,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 12:58:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 12:58:38,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2044 backedges. 47 proven. 1997 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:58:38,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 12:58:38,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453219087] [2022-11-20 12:58:38,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453219087] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 12:58:38,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502727189] [2022-11-20 12:58:38,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 12:58:38,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 12:58:38,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 12:58:38,783 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 12:58:38,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f034c0c-52d7-4bb9-ba79-c3b7a0543c95/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-11-20 12:58:40,133 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-11-20 12:58:40,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 12:58:40,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 208 conjunts are in the unsatisfiable core [2022-11-20 12:58:40,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 12:58:40,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,272 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,342 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-20 12:58:40,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-11-20 12:58:41,068 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:58:41,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2022-11-20 12:58:41,523 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 12:58:41,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 21 [2022-11-20 12:58:43,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 12:58:43,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2044 backedges. 47 proven. 1997 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 12:58:43,669 INFO L328 TraceCheckSpWp]: Computing backward predicates...