./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b 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_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:05:42,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:05:42,246 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:05:42,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:05:42,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:05:42,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:05:42,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:05:42,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:05:42,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:05:42,273 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:05:42,274 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:05:42,275 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:05:42,276 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:05:42,277 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:05:42,278 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:05:42,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:05:42,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:05:42,281 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:05:42,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:05:42,285 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:05:42,287 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:05:42,288 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:05:42,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:05:42,291 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:05:42,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:05:42,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:05:42,296 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:05:42,297 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:05:42,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:05:42,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:05:42,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:05:42,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:05:42,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:05:42,301 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:05:42,302 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:05:42,302 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:05:42,303 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:05:42,303 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:05:42,304 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:05:42,305 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:05:42,305 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:05:42,306 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-18 20:05:42,327 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:05:42,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:05:42,328 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:05:42,328 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:05:42,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:05:42,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:05:42,330 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:05:42,330 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:05:42,331 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:05:42,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:05:42,331 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:05:42,332 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 20:05:42,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:05:42,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:05:42,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:05:42,333 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-18 20:05:42,333 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-18 20:05:42,333 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-18 20:05:42,334 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:05:42,334 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-18 20:05:42,334 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:05:42,334 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:05:42,335 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:05:42,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:05:42,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:05:42,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:05:42,336 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:05:42,336 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:05:42,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:05:42,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:05:42,337 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_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e27d2e3e94b55a3b3138a7f2b03714931363cb725f69630c5958681cf34de99e [2022-11-18 20:05:42,607 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:05:42,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:05:42,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:05:42,650 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:05:42,652 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:05:42,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2022-11-18 20:05:42,754 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/data/25de0c42c/87c980bbc90e416fbc5c3166c5fc1f9f/FLAG074f3ea20 [2022-11-18 20:05:43,257 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:05:43,258 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/sv-benchmarks/c/array-memsafety/openbsd_cstrspn-alloca-2.i [2022-11-18 20:05:43,278 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/data/25de0c42c/87c980bbc90e416fbc5c3166c5fc1f9f/FLAG074f3ea20 [2022-11-18 20:05:43,563 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/data/25de0c42c/87c980bbc90e416fbc5c3166c5fc1f9f [2022-11-18 20:05:43,566 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:05:43,567 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:05:43,569 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:05:43,569 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:05:43,573 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:05:43,574 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:05:43" (1/1) ... [2022-11-18 20:05:43,575 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a19482d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:05:43, skipping insertion in model container [2022-11-18 20:05:43,575 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:05:43" (1/1) ... [2022-11-18 20:05:43,583 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:05:43,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:05:44,027 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:05:44,043 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:05:44,103 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:05:44,136 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:05:44,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:05:44 WrapperNode [2022-11-18 20:05:44,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:05:44,139 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:05:44,139 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:05:44,139 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:05:44,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:05:44" (1/1) ... [2022-11-18 20:05:44,187 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:05:44" (1/1) ... [2022-11-18 20:05:44,222 INFO L138 Inliner]: procedures = 117, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 85 [2022-11-18 20:05:44,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:05:44,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:05:44,223 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:05:44,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:05:44,233 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:05:44" (1/1) ... [2022-11-18 20:05:44,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:05:44" (1/1) ... [2022-11-18 20:05:44,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:05:44" (1/1) ... [2022-11-18 20:05:44,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:05:44" (1/1) ... [2022-11-18 20:05:44,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:05:44" (1/1) ... [2022-11-18 20:05:44,263 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:05:44" (1/1) ... [2022-11-18 20:05:44,265 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:05:44" (1/1) ... [2022-11-18 20:05:44,266 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:05:44" (1/1) ... [2022-11-18 20:05:44,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:05:44,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:05:44,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:05:44,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:05:44,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:05:44" (1/1) ... [2022-11-18 20:05:44,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:05:44,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:05:44,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:05:44,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:05:44,355 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:05:44,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:05:44,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:05:44,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:05:44,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:05:44,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:05:44,492 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:05:44,500 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:05:44,776 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:05:44,783 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:05:44,791 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-18 20:05:44,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:05:44 BoogieIcfgContainer [2022-11-18 20:05:44,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:05:44,801 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:05:44,804 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:05:44,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:05:44,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:05:43" (1/3) ... [2022-11-18 20:05:44,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2011a9f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:05:44, skipping insertion in model container [2022-11-18 20:05:44,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:05:44" (2/3) ... [2022-11-18 20:05:44,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2011a9f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:05:44, skipping insertion in model container [2022-11-18 20:05:44,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:05:44" (3/3) ... [2022-11-18 20:05:44,813 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cstrspn-alloca-2.i [2022-11-18 20:05:44,836 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:05:44,836 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2022-11-18 20:05:44,883 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:05:44,891 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;@1c770730, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:05:44,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2022-11-18 20:05:44,896 INFO L276 IsEmpty]: Start isEmpty. Operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:44,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:05:44,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:44,904 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:44,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:44,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:44,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-11-18 20:05:44,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:44,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673714259] [2022-11-18 20:05:44,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:44,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:45,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:45,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:45,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673714259] [2022-11-18 20:05:45,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673714259] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:45,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:45,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:05:45,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248433471] [2022-11-18 20:05:45,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:45,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:05:45,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:45,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:05:45,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:05:45,394 INFO L87 Difference]: Start difference. First operand has 43 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 42 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) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:45,492 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2022-11-18 20:05:45,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:05:45,495 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 20:05:45,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:45,506 INFO L225 Difference]: With dead ends: 78 [2022-11-18 20:05:45,506 INFO L226 Difference]: Without dead ends: 74 [2022-11-18 20:05:45,510 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 [2022-11-18 20:05:45,515 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:45,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 121 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:05:45,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-18 20:05:45,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 44. [2022-11-18 20:05:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 43 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:45,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-11-18 20:05:45,548 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 7 [2022-11-18 20:05:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:45,548 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-11-18 20:05:45,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:45,549 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-11-18 20:05:45,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:05:45,549 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:45,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:45,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:05:45,550 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:45,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:45,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-11-18 20:05:45,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:45,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964556785] [2022-11-18 20:05:45,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:45,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:45,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:45,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964556785] [2022-11-18 20:05:45,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964556785] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:45,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:45,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:05:45,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629498235] [2022-11-18 20:05:45,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:45,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:05:45,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:45,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:05:45,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:05:45,989 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:46,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:46,080 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-11-18 20:05:46,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:05:46,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 20:05:46,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:46,082 INFO L225 Difference]: With dead ends: 79 [2022-11-18 20:05:46,082 INFO L226 Difference]: Without dead ends: 79 [2022-11-18 20:05:46,082 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 [2022-11-18 20:05:46,084 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 106 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:46,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 53 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:05:46,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-18 20:05:46,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 42. [2022-11-18 20:05:46,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-11-18 20:05:46,093 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 7 [2022-11-18 20:05:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:46,093 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-11-18 20:05:46,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:46,094 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-11-18 20:05:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-18 20:05:46,094 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:46,094 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:46,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:05:46,095 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:46,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-11-18 20:05:46,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:46,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078053323] [2022-11-18 20:05:46,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:46,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:46,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:46,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078053323] [2022-11-18 20:05:46,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078053323] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:46,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:46,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:05:46,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062057007] [2022-11-18 20:05:46,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:46,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:05:46,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:46,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:05:46,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:05:46,313 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:46,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:46,427 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-11-18 20:05:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:05:46,427 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-18 20:05:46,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:46,428 INFO L225 Difference]: With dead ends: 75 [2022-11-18 20:05:46,428 INFO L226 Difference]: Without dead ends: 75 [2022-11-18 20:05:46,429 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 [2022-11-18 20:05:46,430 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 77 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:46,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 75 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:05:46,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-18 20:05:46,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 44. [2022-11-18 20:05:46,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-11-18 20:05:46,437 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 7 [2022-11-18 20:05:46,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:46,437 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-11-18 20:05:46,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:46,438 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-11-18 20:05:46,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:05:46,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:46,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:46,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:05:46,439 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:46,440 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-11-18 20:05:46,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:46,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234716673] [2022-11-18 20:05:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:46,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:46,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:46,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:46,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234716673] [2022-11-18 20:05:46,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234716673] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:46,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:46,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:05:46,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943399713] [2022-11-18 20:05:46,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:46,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:05:46,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:46,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:05:46,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:05:46,574 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:46,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:46,614 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2022-11-18 20:05:46,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:05:46,615 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 20:05:46,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:46,616 INFO L225 Difference]: With dead ends: 72 [2022-11-18 20:05:46,616 INFO L226 Difference]: Without dead ends: 72 [2022-11-18 20:05:46,617 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 [2022-11-18 20:05:46,618 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 61 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:46,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 70 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:05:46,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-18 20:05:46,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2022-11-18 20:05:46,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.5384615384615385) internal successors, (60), 49 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) [2022-11-18 20:05:46,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2022-11-18 20:05:46,630 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 9 [2022-11-18 20:05:46,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:46,630 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2022-11-18 20:05:46,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:46,631 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2022-11-18 20:05:46,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:05:46,631 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:46,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:46,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:05:46,632 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:46,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:46,633 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-11-18 20:05:46,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:46,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249847366] [2022-11-18 20:05:46,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:46,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:46,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:46,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:46,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:46,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249847366] [2022-11-18 20:05:46,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249847366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:46,700 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:46,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:05:46,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412877650] [2022-11-18 20:05:46,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:46,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:05:46,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:46,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:05:46,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:05:46,702 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:46,734 INFO L93 Difference]: Finished difference Result 87 states and 100 transitions. [2022-11-18 20:05:46,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:05:46,735 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 20:05:46,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:46,737 INFO L225 Difference]: With dead ends: 87 [2022-11-18 20:05:46,737 INFO L226 Difference]: Without dead ends: 87 [2022-11-18 20:05:46,738 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 [2022-11-18 20:05:46,741 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 54 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:46,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 82 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:05:46,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-18 20:05:46,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 63. [2022-11-18 20:05:46,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.4615384615384615) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:46,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-11-18 20:05:46,757 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 9 [2022-11-18 20:05:46,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:46,757 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-11-18 20:05:46,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:46,758 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-11-18 20:05:46,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:05:46,758 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:46,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:46,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:05:46,759 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:46,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:46,760 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-11-18 20:05:46,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:46,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730479911] [2022-11-18 20:05:46,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:46,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:46,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:46,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730479911] [2022-11-18 20:05:46,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730479911] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:46,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:46,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:05:46,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016700870] [2022-11-18 20:05:46,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:46,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 20:05:46,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:46,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 20:05:46,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:05:46,867 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:46,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:46,890 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2022-11-18 20:05:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 20:05:46,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 20:05:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:46,891 INFO L225 Difference]: With dead ends: 61 [2022-11-18 20:05:46,891 INFO L226 Difference]: Without dead ends: 61 [2022-11-18 20:05:46,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 20:05:46,893 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 34 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 [2022-11-18 20:05:46,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:05:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-18 20:05:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-11-18 20:05:46,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 60 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) [2022-11-18 20:05:46,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-11-18 20:05:46,898 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2022-11-18 20:05:46,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:46,899 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-11-18 20:05:46,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:46,899 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-11-18 20:05:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:05:46,900 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:46,900 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:46,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:05:46,901 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:46,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:46,902 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-11-18 20:05:46,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:46,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203592449] [2022-11-18 20:05:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:46,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:47,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:47,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203592449] [2022-11-18 20:05:47,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203592449] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:47,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:47,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:05:47,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724702996] [2022-11-18 20:05:47,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:47,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:05:47,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:47,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:05:47,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:05:47,091 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:47,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:47,227 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2022-11-18 20:05:47,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:05:47,228 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 20:05:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:47,228 INFO L225 Difference]: With dead ends: 91 [2022-11-18 20:05:47,228 INFO L226 Difference]: Without dead ends: 91 [2022-11-18 20:05:47,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:05:47,232 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 127 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:47,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 67 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:05:47,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-11-18 20:05:47,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2022-11-18 20:05:47,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 64 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) [2022-11-18 20:05:47,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2022-11-18 20:05:47,242 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 9 [2022-11-18 20:05:47,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:47,242 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2022-11-18 20:05:47,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:47,243 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2022-11-18 20:05:47,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-18 20:05:47,243 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:47,243 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:47,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 20:05:47,244 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:47,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:47,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1241130402, now seen corresponding path program 1 times [2022-11-18 20:05:47,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:47,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079072635] [2022-11-18 20:05:47,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:47,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:47,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:47,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079072635] [2022-11-18 20:05:47,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079072635] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:47,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:47,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:05:47,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199145510] [2022-11-18 20:05:47,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:47,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:05:47,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:47,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:05:47,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:05:47,404 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:47,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:47,469 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2022-11-18 20:05:47,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:05:47,470 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-18 20:05:47,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:47,493 INFO L225 Difference]: With dead ends: 99 [2022-11-18 20:05:47,494 INFO L226 Difference]: Without dead ends: 99 [2022-11-18 20:05:47,494 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 [2022-11-18 20:05:47,495 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 128 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:47,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 49 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:05:47,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-18 20:05:47,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 65. [2022-11-18 20:05:47,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 64 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) [2022-11-18 20:05:47,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2022-11-18 20:05:47,500 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 9 [2022-11-18 20:05:47,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:47,500 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2022-11-18 20:05:47,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:47,500 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2022-11-18 20:05:47,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:05:47,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:47,501 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:47,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 20:05:47,502 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:47,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:47,502 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-11-18 20:05:47,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:47,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812925408] [2022-11-18 20:05:47,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:47,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:47,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:47,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812925408] [2022-11-18 20:05:47,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812925408] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:47,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:47,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 20:05:47,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501481379] [2022-11-18 20:05:47,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:47,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:05:47,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:47,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:05:47,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:05:47,754 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:47,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:47,820 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2022-11-18 20:05:47,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:05:47,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-18 20:05:47,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:47,822 INFO L225 Difference]: With dead ends: 87 [2022-11-18 20:05:47,822 INFO L226 Difference]: Without dead ends: 87 [2022-11-18 20:05:47,822 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 [2022-11-18 20:05:47,823 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:47,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 87 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:05:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-18 20:05:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2022-11-18 20:05:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 67 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:47,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2022-11-18 20:05:47,827 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 10 [2022-11-18 20:05:47,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:47,827 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2022-11-18 20:05:47,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:47,827 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2022-11-18 20:05:47,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-18 20:05:47,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:47,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:47,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 20:05:47,828 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:47,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:47,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1890276516, now seen corresponding path program 1 times [2022-11-18 20:05:47,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:47,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418910172] [2022-11-18 20:05:47,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:47,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:47,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:47,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418910172] [2022-11-18 20:05:47,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418910172] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:47,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:47,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:05:47,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822508249] [2022-11-18 20:05:47,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:47,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:05:47,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:47,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:05:47,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:05:47,953 INFO L87 Difference]: Start difference. First operand 68 states and 83 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) [2022-11-18 20:05:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:47,989 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2022-11-18 20:05:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:05:47,990 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 [2022-11-18 20:05:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:47,991 INFO L225 Difference]: With dead ends: 67 [2022-11-18 20:05:47,991 INFO L226 Difference]: Without dead ends: 67 [2022-11-18 20:05:47,991 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 [2022-11-18 20:05:47,992 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 102 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:47,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:05:47,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-18 20:05:47,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-11-18 20:05:47,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 63 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) [2022-11-18 20:05:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-11-18 20:05:47,995 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 10 [2022-11-18 20:05:47,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:47,996 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-11-18 20:05:47,996 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) [2022-11-18 20:05:47,996 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-11-18 20:05:47,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-18 20:05:47,996 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:47,997 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:47,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 20:05:47,997 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:47,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:47,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-11-18 20:05:47,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:47,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482481588] [2022-11-18 20:05:47,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:47,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:48,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:48,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482481588] [2022-11-18 20:05:48,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482481588] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:05:48,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527237457] [2022-11-18 20:05:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:48,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:05:48,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:05:48,226 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:05:48,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:05:48,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:48,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:05:48,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:05:48,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:05:48,436 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-11-18 20:05:48,451 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 10 treesize of output 8 [2022-11-18 20:05:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:48,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:05:48,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:05:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:48,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527237457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:05:48,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:05:48,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-11-18 20:05:48,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719337104] [2022-11-18 20:05:48,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:05:48,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 20:05:48,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:48,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 20:05:48,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-11-18 20:05:48,743 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 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) [2022-11-18 20:05:49,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:49,110 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2022-11-18 20:05:49,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:05:49,111 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 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 11 [2022-11-18 20:05:49,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:49,112 INFO L225 Difference]: With dead ends: 86 [2022-11-18 20:05:49,112 INFO L226 Difference]: Without dead ends: 86 [2022-11-18 20:05:49,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:05:49,113 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 279 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:49,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 230 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:05:49,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-18 20:05:49,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-11-18 20:05:49,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 60 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:49,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2022-11-18 20:05:49,120 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 11 [2022-11-18 20:05:49,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:49,121 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2022-11-18 20:05:49,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 13 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) [2022-11-18 20:05:49,121 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2022-11-18 20:05:49,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:05:49,123 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:49,124 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:49,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:05:49,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:05:49,330 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:49,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:49,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446205, now seen corresponding path program 1 times [2022-11-18 20:05:49,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:49,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913014212] [2022-11-18 20:05:49,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:49,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:49,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:49,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:49,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913014212] [2022-11-18 20:05:49,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913014212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:49,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:49,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:05:49,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676847765] [2022-11-18 20:05:49,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:49,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:05:49,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:49,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:05:49,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:05:49,394 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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) [2022-11-18 20:05:49,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:49,455 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-11-18 20:05:49,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:05:49,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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 [2022-11-18 20:05:49,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:49,456 INFO L225 Difference]: With dead ends: 60 [2022-11-18 20:05:49,457 INFO L226 Difference]: Without dead ends: 60 [2022-11-18 20:05:49,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:05:49,457 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:49,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 67 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:05:49,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-18 20:05:49,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-18 20:05:49,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 59 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) [2022-11-18 20:05:49,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-11-18 20:05:49,460 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 13 [2022-11-18 20:05:49,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:49,460 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-11-18 20:05:49,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 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) [2022-11-18 20:05:49,461 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-11-18 20:05:49,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:05:49,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:49,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:49,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-18 20:05:49,462 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:49,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:49,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1518446204, now seen corresponding path program 1 times [2022-11-18 20:05:49,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:49,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777701692] [2022-11-18 20:05:49,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:49,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:49,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:49,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:49,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:49,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777701692] [2022-11-18 20:05:49,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777701692] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:49,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:49,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:05:49,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478355290] [2022-11-18 20:05:49,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:49,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:05:49,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:49,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:05:49,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:05:49,587 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) 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) [2022-11-18 20:05:49,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:49,698 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2022-11-18 20:05:49,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 20:05:49,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) 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 [2022-11-18 20:05:49,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:49,699 INFO L225 Difference]: With dead ends: 66 [2022-11-18 20:05:49,700 INFO L226 Difference]: Without dead ends: 66 [2022-11-18 20:05:49,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:05:49,701 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 70 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:49,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 101 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:05:49,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-18 20:05:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2022-11-18 20:05:49,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 61 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-11-18 20:05:49,703 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 13 [2022-11-18 20:05:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:49,704 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-11-18 20:05:49,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) 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) [2022-11-18 20:05:49,704 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-11-18 20:05:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:05:49,704 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:49,705 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:49,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 20:05:49,705 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:49,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:49,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-11-18 20:05:49,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:49,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679198313] [2022-11-18 20:05:49,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:49,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:50,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:50,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:50,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679198313] [2022-11-18 20:05:50,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679198313] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:05:50,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933221708] [2022-11-18 20:05:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:50,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:05:50,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:05:50,019 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:05:50,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:05:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:50,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-18 20:05:50,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:05:50,146 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-11-18 20:05:50,146 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 1 case distinctions, treesize of input 11 treesize of output 17 [2022-11-18 20:05:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:50,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:05:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:50,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933221708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:05:50,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:05:50,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-18 20:05:50,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902446512] [2022-11-18 20:05:50,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:05:50,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:05:50,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:50,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:05:50,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:05:50,675 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:51,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:51,022 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2022-11-18 20:05:51,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:05:51,023 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-18 20:05:51,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:51,024 INFO L225 Difference]: With dead ends: 111 [2022-11-18 20:05:51,024 INFO L226 Difference]: Without dead ends: 111 [2022-11-18 20:05:51,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-11-18 20:05:51,025 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 307 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:51,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 214 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:05:51,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-18 20:05:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 57. [2022-11-18 20:05:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2884615384615385) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-11-18 20:05:51,027 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2022-11-18 20:05:51,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:51,028 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-11-18 20:05:51,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:51,028 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-11-18 20:05:51,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-18 20:05:51,028 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:51,029 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:51,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-18 20:05:51,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:05:51,235 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:51,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:51,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1389200859, now seen corresponding path program 1 times [2022-11-18 20:05:51,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:51,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429231884] [2022-11-18 20:05:51,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:51,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:51,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:51,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:51,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429231884] [2022-11-18 20:05:51,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429231884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:05:51,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699334577] [2022-11-18 20:05:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:51,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:05:51,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:05:51,538 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:05:51,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:05:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:51,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-18 20:05:51,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:05:51,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:05:51,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 13 [2022-11-18 20:05:51,687 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 10 treesize of output 8 [2022-11-18 20:05:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:51,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:05:52,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-18 20:05:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:52,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699334577] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 20:05:52,087 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:05:52,087 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 14 [2022-11-18 20:05:52,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289869859] [2022-11-18 20:05:52,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:52,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:05:52,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:52,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:05:52,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:05:52,089 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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) [2022-11-18 20:05:52,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:52,206 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-11-18 20:05:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:05:52,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 [2022-11-18 20:05:52,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:52,208 INFO L225 Difference]: With dead ends: 58 [2022-11-18 20:05:52,208 INFO L226 Difference]: Without dead ends: 58 [2022-11-18 20:05:52,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:05:52,209 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 113 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:52,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 37 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:05:52,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-18 20:05:52,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 46. [2022-11-18 20:05:52,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 45 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-11-18 20:05:52,211 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 13 [2022-11-18 20:05:52,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:52,211 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-11-18 20:05:52,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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) [2022-11-18 20:05:52,212 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-11-18 20:05:52,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 20:05:52,212 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:52,212 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:52,222 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:05:52,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:05:52,413 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:52,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:52,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298785, now seen corresponding path program 1 times [2022-11-18 20:05:52,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:52,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199827491] [2022-11-18 20:05:52,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:52,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:52,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:52,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:52,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199827491] [2022-11-18 20:05:52,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199827491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:52,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:52,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:05:52,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618149573] [2022-11-18 20:05:52,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:52,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:05:52,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:52,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:05:52,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:05:52,493 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:52,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:52,568 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-11-18 20:05:52,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:05:52,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-18 20:05:52,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:52,569 INFO L225 Difference]: With dead ends: 46 [2022-11-18 20:05:52,569 INFO L226 Difference]: Without dead ends: 46 [2022-11-18 20:05:52,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:05:52,570 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 51 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:52,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 76 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:05:52,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-18 20:05:52,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-11-18 20:05:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 44 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:52,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 52 transitions. [2022-11-18 20:05:52,572 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 52 transitions. Word has length 16 [2022-11-18 20:05:52,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:52,573 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 52 transitions. [2022-11-18 20:05:52,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 52 transitions. [2022-11-18 20:05:52,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-18 20:05:52,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:52,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:52,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-18 20:05:52,574 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:52,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1435298784, now seen corresponding path program 1 times [2022-11-18 20:05:52,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:52,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482632203] [2022-11-18 20:05:52,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:52,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:52,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:52,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:52,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:52,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482632203] [2022-11-18 20:05:52,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482632203] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:52,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:52,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:05:52,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549943700] [2022-11-18 20:05:52,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:52,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-18 20:05:52,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:52,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-18 20:05:52,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-18 20:05:52,767 INFO L87 Difference]: Start difference. First operand 45 states and 52 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:52,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:52,934 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-11-18 20:05:52,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:05:52,934 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-18 20:05:52,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:52,935 INFO L225 Difference]: With dead ends: 53 [2022-11-18 20:05:52,935 INFO L226 Difference]: Without dead ends: 53 [2022-11-18 20:05:52,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:05:52,936 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:52,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 95 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:05:52,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-18 20:05:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2022-11-18 20:05:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2022-11-18 20:05:52,938 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 16 [2022-11-18 20:05:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:52,938 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2022-11-18 20:05:52,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:52,939 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2022-11-18 20:05:52,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 20:05:52,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:52,939 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:52,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-18 20:05:52,940 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:52,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:52,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1033258167, now seen corresponding path program 1 times [2022-11-18 20:05:52,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:52,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28487074] [2022-11-18 20:05:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:52,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:53,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:53,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28487074] [2022-11-18 20:05:53,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28487074] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:53,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:53,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:05:53,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313212246] [2022-11-18 20:05:53,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:53,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:05:53,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:53,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:05:53,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:05:53,150 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:53,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:53,179 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2022-11-18 20:05:53,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:05:53,179 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-11-18 20:05:53,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:53,180 INFO L225 Difference]: With dead ends: 46 [2022-11-18 20:05:53,180 INFO L226 Difference]: Without dead ends: 43 [2022-11-18 20:05:53,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:05:53,181 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 29 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:53,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 56 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:05:53,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-18 20:05:53,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-18 20:05:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2022-11-18 20:05:53,184 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 21 [2022-11-18 20:05:53,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:53,186 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2022-11-18 20:05:53,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:53,187 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2022-11-18 20:05:53,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 20:05:53,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:53,188 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:53,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-18 20:05:53,189 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:53,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:53,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1033312273, now seen corresponding path program 1 times [2022-11-18 20:05:53,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:53,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335488118] [2022-11-18 20:05:53,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:53,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:53,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:53,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335488118] [2022-11-18 20:05:53,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335488118] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:53,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:53,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:05:53,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461922909] [2022-11-18 20:05:53,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:53,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:05:53,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:05:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:05:53,460 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:53,658 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-11-18 20:05:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:05:53,659 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-11-18 20:05:53,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:53,659 INFO L225 Difference]: With dead ends: 53 [2022-11-18 20:05:53,660 INFO L226 Difference]: Without dead ends: 34 [2022-11-18 20:05:53,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:05:53,660 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:53,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 196 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:05:53,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-18 20:05:53,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-11-18 20:05:53,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 32 states have (on average 1.1875) 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) [2022-11-18 20:05:53,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-11-18 20:05:53,663 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 21 [2022-11-18 20:05:53,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:53,663 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-11-18 20:05:53,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:53,663 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-11-18 20:05:53,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-18 20:05:53,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:53,664 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:53,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-18 20:05:53,664 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:53,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:53,665 INFO L85 PathProgramCache]: Analyzing trace with hash -960832433, now seen corresponding path program 1 times [2022-11-18 20:05:53,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:53,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202077764] [2022-11-18 20:05:53,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:53,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:53,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:53,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202077764] [2022-11-18 20:05:53,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202077764] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:53,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:53,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-18 20:05:53,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355298378] [2022-11-18 20:05:53,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:53,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:05:53,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:53,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:05:53,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:05:53,963 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:54,148 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-11-18 20:05:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:05:54,148 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 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 21 [2022-11-18 20:05:54,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:54,149 INFO L225 Difference]: With dead ends: 48 [2022-11-18 20:05:54,149 INFO L226 Difference]: Without dead ends: 38 [2022-11-18 20:05:54,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:05:54,150 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 100 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:54,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 147 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:05:54,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-18 20:05:54,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2022-11-18 20:05:54,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:54,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-18 20:05:54,152 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 21 [2022-11-18 20:05:54,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:54,152 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-18 20:05:54,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:54,153 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-18 20:05:54,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 20:05:54,153 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:54,153 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:54,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-18 20:05:54,154 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:54,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:54,154 INFO L85 PathProgramCache]: Analyzing trace with hash -276078, now seen corresponding path program 1 times [2022-11-18 20:05:54,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:54,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108578747] [2022-11-18 20:05:54,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:54,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:54,467 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:54,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:54,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108578747] [2022-11-18 20:05:54,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108578747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:05:54,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049067570] [2022-11-18 20:05:54,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:54,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:05:54,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:05:54,470 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:05:54,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:05:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:54,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:05:54,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:05:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:54,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:05:54,946 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 [2022-11-18 20:05:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:54,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049067570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:05:54,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:05:54,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 23 [2022-11-18 20:05:54,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148040366] [2022-11-18 20:05:54,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:05:54,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-18 20:05:54,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:54,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-18 20:05:54,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:05:54,984 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:55,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:55,385 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-11-18 20:05:55,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:05:55,386 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 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 25 [2022-11-18 20:05:55,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:55,386 INFO L225 Difference]: With dead ends: 49 [2022-11-18 20:05:55,386 INFO L226 Difference]: Without dead ends: 49 [2022-11-18 20:05:55,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2022-11-18 20:05:55,388 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 155 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:55,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 232 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:05:55,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-18 20:05:55,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2022-11-18 20:05:55,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:55,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2022-11-18 20:05:55,390 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 25 [2022-11-18 20:05:55,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:55,390 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2022-11-18 20:05:55,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:55,390 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2022-11-18 20:05:55,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 20:05:55,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:55,391 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:55,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-18 20:05:55,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:05:55,595 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:55,595 INFO L85 PathProgramCache]: Analyzing trace with hash -278256, now seen corresponding path program 1 times [2022-11-18 20:05:55,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:55,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757986343] [2022-11-18 20:05:55,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:55,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:55,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:05:55,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:55,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757986343] [2022-11-18 20:05:55,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757986343] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:55,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:55,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-18 20:05:55,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135647905] [2022-11-18 20:05:55,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:55,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 20:05:55,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:55,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 20:05:55,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-11-18 20:05:55,910 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:56,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:56,088 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2022-11-18 20:05:56,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:05:56,091 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2022-11-18 20:05:56,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:56,091 INFO L225 Difference]: With dead ends: 65 [2022-11-18 20:05:56,091 INFO L226 Difference]: Without dead ends: 65 [2022-11-18 20:05:56,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:05:56,092 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 41 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:56,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 197 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:05:56,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-18 20:05:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-11-18 20:05:56,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:56,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2022-11-18 20:05:56,095 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 25 [2022-11-18 20:05:56,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:56,096 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2022-11-18 20:05:56,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:56,097 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2022-11-18 20:05:56,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-18 20:05:56,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:56,098 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:56,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-18 20:05:56,098 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:56,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:56,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1805716590, now seen corresponding path program 1 times [2022-11-18 20:05:56,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:56,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437782676] [2022-11-18 20:05:56,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:56,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:56,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:05:56,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:56,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437782676] [2022-11-18 20:05:56,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437782676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:05:56,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:05:56,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-18 20:05:56,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312555933] [2022-11-18 20:05:56,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:05:56,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:05:56,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:56,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:05:56,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:05:56,461 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:56,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:56,720 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2022-11-18 20:05:56,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:05:56,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2022-11-18 20:05:56,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:56,721 INFO L225 Difference]: With dead ends: 93 [2022-11-18 20:05:56,721 INFO L226 Difference]: Without dead ends: 93 [2022-11-18 20:05:56,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:05:56,724 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 92 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:56,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 172 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:05:56,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-18 20:05:56,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2022-11-18 20:05:56,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 64 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) [2022-11-18 20:05:56,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2022-11-18 20:05:56,730 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 25 [2022-11-18 20:05:56,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:56,730 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2022-11-18 20:05:56,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:56,730 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2022-11-18 20:05:56,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-18 20:05:56,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:56,731 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:56,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-18 20:05:56,731 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:56,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:56,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2113727723, now seen corresponding path program 1 times [2022-11-18 20:05:56,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:56,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200441410] [2022-11-18 20:05:56,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:56,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:05:57,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:57,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200441410] [2022-11-18 20:05:57,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200441410] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:05:57,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236920455] [2022-11-18 20:05:57,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:57,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:05:57,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:05:57,039 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:05:57,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:05:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:57,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-18 20:05:57,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:05:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:05:57,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:05:57,436 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 [2022-11-18 20:05:57,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:05:57,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236920455] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:05:57,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:05:57,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-11-18 20:05:57,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403343742] [2022-11-18 20:05:57,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:05:57,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-18 20:05:57,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:05:57,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-18 20:05:57,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:05:57,473 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:57,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:05:57,828 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2022-11-18 20:05:57,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:05:57,828 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 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 29 [2022-11-18 20:05:57,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:05:57,829 INFO L225 Difference]: With dead ends: 86 [2022-11-18 20:05:57,829 INFO L226 Difference]: Without dead ends: 86 [2022-11-18 20:05:57,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:05:57,830 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 181 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:05:57,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 290 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:05:57,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-18 20:05:57,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2022-11-18 20:05:57,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 1.1666666666666667) internal successors, (91), 79 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:57,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2022-11-18 20:05:57,833 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 29 [2022-11-18 20:05:57,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:05:57,833 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2022-11-18 20:05:57,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 20 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:05:57,833 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2022-11-18 20:05:57,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-18 20:05:57,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:05:57,834 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:05:57,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:05:58,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:05:58,040 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:05:58,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:05:58,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1128269345, now seen corresponding path program 2 times [2022-11-18 20:05:58,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:05:58,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749436601] [2022-11-18 20:05:58,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:05:58,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:05:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:05:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:58,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:05:58,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749436601] [2022-11-18 20:05:58,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749436601] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:05:58,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536174023] [2022-11-18 20:05:58,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:05:58,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:05:58,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:05:58,595 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:05:58,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:05:58,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:05:58,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:05:58,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 20:05:58,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:05:58,772 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 [2022-11-18 20:05:59,297 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:05:59,297 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 17 [2022-11-18 20:05:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:05:59,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:00,305 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 [2022-11-18 20:06:00,312 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 [2022-11-18 20:06:00,318 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 [2022-11-18 20:06:00,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:06:00,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536174023] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:06:00,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:06:00,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2022-11-18 20:06:00,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988157783] [2022-11-18 20:06:00,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:00,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:06:00,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:06:00,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:06:00,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:06:00,368 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2022-11-18 20:06:01,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:01,179 INFO L93 Difference]: Finished difference Result 134 states and 147 transitions. [2022-11-18 20:06:01,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:06:01,180 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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 30 [2022-11-18 20:06:01,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:01,181 INFO L225 Difference]: With dead ends: 134 [2022-11-18 20:06:01,182 INFO L226 Difference]: Without dead ends: 115 [2022-11-18 20:06:01,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=254, Invalid=2398, Unknown=0, NotChecked=0, Total=2652 [2022-11-18 20:06:01,183 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 85 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:01,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 432 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 191 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2022-11-18 20:06:01,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-18 20:06:01,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 109. [2022-11-18 20:06:01,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 107 states have (on average 1.1401869158878504) internal successors, (122), 108 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:01,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2022-11-18 20:06:01,195 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 30 [2022-11-18 20:06:01,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:01,195 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2022-11-18 20:06:01,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.972972972972973) internal successors, (73), 37 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) [2022-11-18 20:06:01,196 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2022-11-18 20:06:01,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-18 20:06:01,198 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:01,198 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:01,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:01,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-18 20:06:01,404 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:06:01,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:01,404 INFO L85 PathProgramCache]: Analyzing trace with hash -988436448, now seen corresponding path program 2 times [2022-11-18 20:06:01,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:06:01,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811766236] [2022-11-18 20:06:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:01,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:06:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:02,055 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:06:02,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:06:02,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811766236] [2022-11-18 20:06:02,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811766236] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:02,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933356358] [2022-11-18 20:06:02,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:06:02,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:02,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:06:02,059 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:06:02,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:06:02,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:06:02,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:02,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-18 20:06:02,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:02,204 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 10 treesize of output 8 [2022-11-18 20:06:02,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-18 20:06:02,418 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 17 treesize of output 19 [2022-11-18 20:06:03,227 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 20:06:03,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2022-11-18 20:06:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:06:03,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:04,113 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:06:04,114 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-11-18 20:06:04,123 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:06:04,124 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 44 treesize of output 39 [2022-11-18 20:06:04,134 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:06:04,135 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 32 treesize of output 32 [2022-11-18 20:06:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:06:04,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933356358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:06:04,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:06:04,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 21, 22] total 50 [2022-11-18 20:06:04,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849881953] [2022-11-18 20:06:04,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:04,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 20:06:04,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:06:04,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 20:06:04,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2245, Unknown=3, NotChecked=0, Total=2450 [2022-11-18 20:06:04,455 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 50 states, 50 states have (on average 1.82) internal successors, (91), 50 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:06,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:06,282 INFO L93 Difference]: Finished difference Result 181 states and 199 transitions. [2022-11-18 20:06:06,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:06:06,283 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.82) internal successors, (91), 50 states have internal predecessors, (91), 0 states have call successors, (0), 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 37 [2022-11-18 20:06:06,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:06,284 INFO L225 Difference]: With dead ends: 181 [2022-11-18 20:06:06,284 INFO L226 Difference]: Without dead ends: 181 [2022-11-18 20:06:06,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=614, Invalid=4353, Unknown=3, NotChecked=0, Total=4970 [2022-11-18 20:06:06,286 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 356 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:06,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 712 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 458 Invalid, 0 Unknown, 242 Unchecked, 0.4s Time] [2022-11-18 20:06:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-11-18 20:06:06,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 160. [2022-11-18 20:06:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 158 states have (on average 1.139240506329114) internal successors, (180), 159 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2022-11-18 20:06:06,302 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 37 [2022-11-18 20:06:06,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:06,302 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2022-11-18 20:06:06,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.82) internal successors, (91), 50 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:06,302 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2022-11-18 20:06:06,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-18 20:06:06,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:06,303 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:06,311 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 20:06:06,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-18 20:06:06,509 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:06:06,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:06,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1971973557, now seen corresponding path program 3 times [2022-11-18 20:06:06,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:06:06,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499930793] [2022-11-18 20:06:06,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:06,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:06:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:06:06,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:06:06,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499930793] [2022-11-18 20:06:06,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499930793] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:06,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604661110] [2022-11-18 20:06:06,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:06:06,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:06,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:06:06,989 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:06:07,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:06:07,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-18 20:06:07,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:07,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-18 20:06:07,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:07,247 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 [2022-11-18 20:06:07,468 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 [2022-11-18 20:06:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:06:07,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:07,593 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 [2022-11-18 20:06:07,598 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 [2022-11-18 20:06:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:06:07,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604661110] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:06:07,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:06:07,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 30 [2022-11-18 20:06:07,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469044228] [2022-11-18 20:06:07,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:07,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-18 20:06:07,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:06:07,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-18 20:06:07,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-11-18 20:06:07,764 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 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) [2022-11-18 20:06:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:08,498 INFO L93 Difference]: Finished difference Result 338 states and 368 transitions. [2022-11-18 20:06:08,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-18 20:06:08,499 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 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) Word has length 39 [2022-11-18 20:06:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:08,500 INFO L225 Difference]: With dead ends: 338 [2022-11-18 20:06:08,501 INFO L226 Difference]: Without dead ends: 308 [2022-11-18 20:06:08,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=367, Invalid=1795, Unknown=0, NotChecked=0, Total=2162 [2022-11-18 20:06:08,503 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 340 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:08,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 539 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 431 Invalid, 0 Unknown, 95 Unchecked, 0.3s Time] [2022-11-18 20:06:08,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-18 20:06:08,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 234. [2022-11-18 20:06:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 232 states have (on average 1.125) internal successors, (261), 233 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) [2022-11-18 20:06:08,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 261 transitions. [2022-11-18 20:06:08,510 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 261 transitions. Word has length 39 [2022-11-18 20:06:08,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:08,510 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 261 transitions. [2022-11-18 20:06:08,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 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) [2022-11-18 20:06:08,510 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 261 transitions. [2022-11-18 20:06:08,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 20:06:08,511 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:08,511 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:08,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:08,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-18 20:06:08,718 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:06:08,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:08,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1200593699, now seen corresponding path program 3 times [2022-11-18 20:06:08,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:06:08,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988114381] [2022-11-18 20:06:08,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:08,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:06:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:09,069 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:06:09,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:06:09,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988114381] [2022-11-18 20:06:09,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988114381] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:09,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93023380] [2022-11-18 20:06:09,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:06:09,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:09,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:06:09,075 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:06:09,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:06:09,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:06:09,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:09,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-18 20:06:09,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:06:09,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:09,666 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 [2022-11-18 20:06:09,758 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:06:09,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93023380] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:06:09,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:06:09,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-11-18 20:06:09,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366587247] [2022-11-18 20:06:09,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:09,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-18 20:06:09,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:06:09,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-18 20:06:09,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-11-18 20:06:09,760 INFO L87 Difference]: Start difference. First operand 234 states and 261 transitions. Second operand has 23 states, 22 states have (on average 3.772727272727273) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:10,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:10,327 INFO L93 Difference]: Finished difference Result 284 states and 313 transitions. [2022-11-18 20:06:10,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-18 20:06:10,328 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.772727272727273) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 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 41 [2022-11-18 20:06:10,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:10,329 INFO L225 Difference]: With dead ends: 284 [2022-11-18 20:06:10,329 INFO L226 Difference]: Without dead ends: 284 [2022-11-18 20:06:10,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=906, Unknown=0, NotChecked=0, Total=1122 [2022-11-18 20:06:10,330 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 152 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:10,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 488 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:06:10,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-18 20:06:10,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 262. [2022-11-18 20:06:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 260 states have (on average 1.1307692307692307) internal successors, (294), 261 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:10,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 294 transitions. [2022-11-18 20:06:10,337 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 294 transitions. Word has length 41 [2022-11-18 20:06:10,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:10,338 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 294 transitions. [2022-11-18 20:06:10,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.772727272727273) internal successors, (83), 23 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:10,338 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 294 transitions. [2022-11-18 20:06:10,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-18 20:06:10,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:10,339 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:10,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:10,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-18 20:06:10,540 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:06:10,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:10,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1978925873, now seen corresponding path program 1 times [2022-11-18 20:06:10,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:06:10,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875809446] [2022-11-18 20:06:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:10,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:06:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:10,988 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:06:10,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:06:10,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875809446] [2022-11-18 20:06:10,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875809446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:10,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107401891] [2022-11-18 20:06:10,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:10,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:10,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:06:10,990 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:06:11,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:06:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:11,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 44 conjunts are in the unsatisfiable core [2022-11-18 20:06:11,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:11,158 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 [2022-11-18 20:06:11,694 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:06:11,694 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 17 [2022-11-18 20:06:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:06:11,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:12,707 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 [2022-11-18 20:06:12,713 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 [2022-11-18 20:06:12,719 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 [2022-11-18 20:06:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:06:12,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107401891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:06:12,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:06:12,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2022-11-18 20:06:12,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385575559] [2022-11-18 20:06:12,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:12,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-18 20:06:12,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:06:12,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-18 20:06:12,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2022-11-18 20:06:12,766 INFO L87 Difference]: Start difference. First operand 262 states and 294 transitions. Second operand has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 37 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:13,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:13,881 INFO L93 Difference]: Finished difference Result 346 states and 382 transitions. [2022-11-18 20:06:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-18 20:06:13,881 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 37 states have internal predecessors, (99), 0 states have call successors, (0), 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 [2022-11-18 20:06:13,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:13,882 INFO L225 Difference]: With dead ends: 346 [2022-11-18 20:06:13,882 INFO L226 Difference]: Without dead ends: 282 [2022-11-18 20:06:13,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=313, Invalid=2879, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 20:06:13,884 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:13,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 413 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 115 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-11-18 20:06:13,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-18 20:06:13,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 245. [2022-11-18 20:06:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 243 states have (on average 1.131687242798354) internal successors, (275), 244 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:13,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 275 transitions. [2022-11-18 20:06:13,892 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 275 transitions. Word has length 42 [2022-11-18 20:06:13,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:13,892 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 275 transitions. [2022-11-18 20:06:13,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 37 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:13,892 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 275 transitions. [2022-11-18 20:06:13,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-18 20:06:13,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:13,893 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:13,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:14,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-18 20:06:14,099 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:06:14,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:14,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1860251704, now seen corresponding path program 4 times [2022-11-18 20:06:14,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:06:14,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890907069] [2022-11-18 20:06:14,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:14,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:06:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:06:14,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:06:14,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890907069] [2022-11-18 20:06:14,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890907069] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:14,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906863474] [2022-11-18 20:06:14,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:06:14,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:14,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:06:14,544 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:06:14,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:06:14,654 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:06:14,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:14,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-18 20:06:14,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:14,700 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 [2022-11-18 20:06:15,719 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-11-18 20:06:15,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 39 [2022-11-18 20:06:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:06:15,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:17,185 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 [2022-11-18 20:06:17,192 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 [2022-11-18 20:06:17,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2022-11-18 20:06:17,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:06:17,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906863474] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:06:17,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:06:17,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 18] total 45 [2022-11-18 20:06:17,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232558932] [2022-11-18 20:06:17,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:17,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-18 20:06:17,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:06:17,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-18 20:06:17,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1849, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 20:06:17,260 INFO L87 Difference]: Start difference. First operand 245 states and 275 transitions. Second operand has 46 states, 45 states have (on average 2.088888888888889) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:18,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:18,669 INFO L93 Difference]: Finished difference Result 281 states and 309 transitions. [2022-11-18 20:06:18,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-18 20:06:18,670 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.088888888888889) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 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 43 [2022-11-18 20:06:18,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:18,671 INFO L225 Difference]: With dead ends: 281 [2022-11-18 20:06:18,671 INFO L226 Difference]: Without dead ends: 239 [2022-11-18 20:06:18,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=535, Invalid=4435, Unknown=0, NotChecked=0, Total=4970 [2022-11-18 20:06:18,674 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 68 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:18,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 636 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2022-11-18 20:06:18,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-18 20:06:18,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 201. [2022-11-18 20:06:18,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 199 states have (on average 1.1155778894472361) internal successors, (222), 200 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) [2022-11-18 20:06:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 222 transitions. [2022-11-18 20:06:18,693 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 222 transitions. Word has length 43 [2022-11-18 20:06:18,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:18,693 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 222 transitions. [2022-11-18 20:06:18,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.088888888888889) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:18,693 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 222 transitions. [2022-11-18 20:06:18,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 20:06:18,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:18,694 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:18,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:18,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:18,900 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:06:18,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:18,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1252507090, now seen corresponding path program 4 times [2022-11-18 20:06:18,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:06:18,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77965812] [2022-11-18 20:06:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:18,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:06:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:06:21,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:06:21,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77965812] [2022-11-18 20:06:21,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77965812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:21,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851821937] [2022-11-18 20:06:21,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:06:21,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:21,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:06:21,085 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:06:21,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:06:21,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:06:21,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:21,212 WARN L261 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 113 conjunts are in the unsatisfiable core [2022-11-18 20:06:21,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:21,282 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 [2022-11-18 20:06:21,368 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-18 20:06:21,369 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 25 treesize of output 24 [2022-11-18 20:06:24,926 INFO L321 Elim1Store]: treesize reduction 65, result has 59.1 percent of original size [2022-11-18 20:06:24,926 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 71 treesize of output 116 [2022-11-18 20:06:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:06:25,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:29,902 INFO L321 Elim1Store]: treesize reduction 75, result has 34.8 percent of original size [2022-11-18 20:06:29,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 531 treesize of output 411 [2022-11-18 20:06:29,936 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:06:29,937 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 399 treesize of output 373 [2022-11-18 20:06:29,972 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 [2022-11-18 20:06:30,128 INFO L321 Elim1Store]: treesize reduction 15, result has 57.1 percent of original size [2022-11-18 20:06:30,130 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 60 [2022-11-18 20:06:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:06:30,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851821937] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:06:30,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:06:30,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 81 [2022-11-18 20:06:30,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044837808] [2022-11-18 20:06:30,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:30,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-18 20:06:30,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:06:30,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-18 20:06:30,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=6103, Unknown=0, NotChecked=0, Total=6480 [2022-11-18 20:06:30,207 INFO L87 Difference]: Start difference. First operand 201 states and 222 transitions. Second operand has 81 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 81 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:36,647 INFO L93 Difference]: Finished difference Result 307 states and 336 transitions. [2022-11-18 20:06:36,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-18 20:06:36,648 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 81 states have internal predecessors, (121), 0 states have call successors, (0), 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 [2022-11-18 20:06:36,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:36,650 INFO L225 Difference]: With dead ends: 307 [2022-11-18 20:06:36,650 INFO L226 Difference]: Without dead ends: 251 [2022-11-18 20:06:36,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3152 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=953, Invalid=14299, Unknown=0, NotChecked=0, Total=15252 [2022-11-18 20:06:36,653 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:36,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 465 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 714 Invalid, 0 Unknown, 240 Unchecked, 0.7s Time] [2022-11-18 20:06:36,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-11-18 20:06:36,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 209. [2022-11-18 20:06:36,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 207 states have (on average 1.1256038647342994) internal successors, (233), 208 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:36,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 233 transitions. [2022-11-18 20:06:36,659 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 233 transitions. Word has length 49 [2022-11-18 20:06:36,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:36,659 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 233 transitions. [2022-11-18 20:06:36,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.4938271604938271) internal successors, (121), 81 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:36,660 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 233 transitions. [2022-11-18 20:06:36,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-18 20:06:36,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:36,660 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:36,675 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:36,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-11-18 20:06:36,866 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:06:36,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:36,867 INFO L85 PathProgramCache]: Analyzing trace with hash 139790408, now seen corresponding path program 2 times [2022-11-18 20:06:36,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:06:36,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556450947] [2022-11-18 20:06:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:36,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:06:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:06:37,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:06:37,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556450947] [2022-11-18 20:06:37,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556450947] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:37,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062841800] [2022-11-18 20:06:37,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:06:37,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:37,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:06:37,451 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:06:37,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:06:37,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:06:37,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:37,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-18 20:06:37,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:37,601 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:06:37,602 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 20:06:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:06:37,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:38,443 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 47 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:06:38,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062841800] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:06:38,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:06:38,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-11-18 20:06:38,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492825876] [2022-11-18 20:06:38,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:38,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-18 20:06:38,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:06:38,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-18 20:06:38,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2022-11-18 20:06:38,445 INFO L87 Difference]: Start difference. First operand 209 states and 233 transitions. Second operand has 35 states, 34 states have (on average 3.823529411764706) internal successors, (130), 35 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:39,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:39,295 INFO L93 Difference]: Finished difference Result 297 states and 327 transitions. [2022-11-18 20:06:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-18 20:06:39,295 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.823529411764706) internal successors, (130), 35 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2022-11-18 20:06:39,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:39,297 INFO L225 Difference]: With dead ends: 297 [2022-11-18 20:06:39,297 INFO L226 Difference]: Without dead ends: 297 [2022-11-18 20:06:39,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=447, Invalid=1809, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 20:06:39,299 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 334 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:39,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 371 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:06:39,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-18 20:06:39,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 224. [2022-11-18 20:06:39,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 222 states have (on average 1.1261261261261262) internal successors, (250), 223 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:39,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 250 transitions. [2022-11-18 20:06:39,313 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 250 transitions. Word has length 55 [2022-11-18 20:06:39,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:39,313 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 250 transitions. [2022-11-18 20:06:39,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.823529411764706) internal successors, (130), 35 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:39,313 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 250 transitions. [2022-11-18 20:06:39,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-18 20:06:39,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:39,319 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:39,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:39,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:39,520 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:06:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:39,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1224252024, now seen corresponding path program 1 times [2022-11-18 20:06:39,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:06:39,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397292646] [2022-11-18 20:06:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:39,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:06:39,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:06:40,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:06:40,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397292646] [2022-11-18 20:06:40,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397292646] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:40,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879305345] [2022-11-18 20:06:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:40,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:40,426 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:06:40,427 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:06:40,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:06:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:40,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-18 20:06:40,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:40,562 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 10 treesize of output 8 [2022-11-18 20:06:40,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-18 20:06:40,885 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 17 treesize of output 19 [2022-11-18 20:06:41,084 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 [2022-11-18 20:06:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:06:41,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:41,374 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:06:41,374 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 20:06:41,381 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:06:41,381 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 37 treesize of output 32 [2022-11-18 20:06:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:06:41,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879305345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:06:41,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:06:41,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16, 16] total 40 [2022-11-18 20:06:41,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836841999] [2022-11-18 20:06:41,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:41,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-18 20:06:41,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:06:41,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-18 20:06:41,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1438, Unknown=6, NotChecked=0, Total=1560 [2022-11-18 20:06:41,635 INFO L87 Difference]: Start difference. First operand 224 states and 250 transitions. Second operand has 40 states, 40 states have (on average 2.375) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:43,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:43,143 INFO L93 Difference]: Finished difference Result 393 states and 430 transitions. [2022-11-18 20:06:43,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 20:06:43,143 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 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 [2022-11-18 20:06:43,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:43,145 INFO L225 Difference]: With dead ends: 393 [2022-11-18 20:06:43,145 INFO L226 Difference]: Without dead ends: 334 [2022-11-18 20:06:43,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=512, Invalid=3772, Unknown=6, NotChecked=0, Total=4290 [2022-11-18 20:06:43,147 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 338 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 888 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:43,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 888 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 919 Invalid, 0 Unknown, 68 Unchecked, 0.5s Time] [2022-11-18 20:06:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-11-18 20:06:43,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 278. [2022-11-18 20:06:43,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 276 states have (on average 1.1304347826086956) internal successors, (312), 277 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) [2022-11-18 20:06:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 312 transitions. [2022-11-18 20:06:43,155 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 312 transitions. Word has length 58 [2022-11-18 20:06:43,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:43,155 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 312 transitions. [2022-11-18 20:06:43,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.375) internal successors, (95), 40 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 312 transitions. [2022-11-18 20:06:43,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-18 20:06:43,156 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:43,157 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:43,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-18 20:06:43,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:43,363 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:06:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:43,363 INFO L85 PathProgramCache]: Analyzing trace with hash 118455529, now seen corresponding path program 3 times [2022-11-18 20:06:43,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:06:43,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800486676] [2022-11-18 20:06:43,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:43,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:06:43,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:06:44,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:06:44,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800486676] [2022-11-18 20:06:44,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800486676] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:44,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533171542] [2022-11-18 20:06:44,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:06:44,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:44,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:06:44,003 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:06:44,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:06:44,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:06:44,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:44,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-18 20:06:44,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:44,353 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 [2022-11-18 20:06:44,639 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 [2022-11-18 20:06:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:06:44,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:44,791 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 [2022-11-18 20:06:44,796 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 [2022-11-18 20:06:44,952 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:06:44,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533171542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:06:44,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:06:44,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 33 [2022-11-18 20:06:44,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837059349] [2022-11-18 20:06:44,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:44,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-18 20:06:44,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:06:44,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-18 20:06:44,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2022-11-18 20:06:44,954 INFO L87 Difference]: Start difference. First operand 278 states and 312 transitions. Second operand has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:45,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:45,812 INFO L93 Difference]: Finished difference Result 509 states and 558 transitions. [2022-11-18 20:06:45,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 20:06:45,813 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 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 60 [2022-11-18 20:06:45,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:45,815 INFO L225 Difference]: With dead ends: 509 [2022-11-18 20:06:45,815 INFO L226 Difference]: Without dead ends: 391 [2022-11-18 20:06:45,815 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2022-11-18 20:06:45,816 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 240 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:45,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 635 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 588 Invalid, 0 Unknown, 57 Unchecked, 0.4s Time] [2022-11-18 20:06:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-18 20:06:45,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 365. [2022-11-18 20:06:45,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 363 states have (on average 1.1267217630853994) internal successors, (409), 364 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:45,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 409 transitions. [2022-11-18 20:06:45,826 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 409 transitions. Word has length 60 [2022-11-18 20:06:45,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:45,826 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 409 transitions. [2022-11-18 20:06:45,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.303030303030303) internal successors, (109), 33 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 409 transitions. [2022-11-18 20:06:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-18 20:06:45,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:45,828 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:45,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-11-18 20:06:46,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-18 20:06:46,035 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:06:46,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:46,035 INFO L85 PathProgramCache]: Analyzing trace with hash 769950309, now seen corresponding path program 2 times [2022-11-18 20:06:46,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:06:46,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152239537] [2022-11-18 20:06:46,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:46,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:06:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 1 proven. 54 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:06:46,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:06:46,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152239537] [2022-11-18 20:06:46,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152239537] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:46,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423269376] [2022-11-18 20:06:46,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:06:46,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:46,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:06:46,507 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:06:46,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:06:46,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:06:46,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:46,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-18 20:06:46,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:46,950 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:06:46,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:06:47,269 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 [2022-11-18 20:06:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 49 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:06:47,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423269376] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:06:47,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:06:47,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-11-18 20:06:47,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640781391] [2022-11-18 20:06:47,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:06:47,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-18 20:06:47,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:06:47,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-18 20:06:47,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-11-18 20:06:47,365 INFO L87 Difference]: Start difference. First operand 365 states and 409 transitions. Second operand has 27 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 27 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:06:48,020 INFO L93 Difference]: Finished difference Result 486 states and 538 transitions. [2022-11-18 20:06:48,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 20:06:48,021 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 27 states have internal predecessors, (109), 0 states have call successors, (0), 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 [2022-11-18 20:06:48,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:06:48,023 INFO L225 Difference]: With dead ends: 486 [2022-11-18 20:06:48,023 INFO L226 Difference]: Without dead ends: 486 [2022-11-18 20:06:48,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=1257, Unknown=0, NotChecked=0, Total=1560 [2022-11-18 20:06:48,024 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 275 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:06:48,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 622 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:06:48,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-11-18 20:06:48,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 445. [2022-11-18 20:06:48,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 443 states have (on average 1.1286681715575622) internal successors, (500), 444 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:48,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 500 transitions. [2022-11-18 20:06:48,035 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 500 transitions. Word has length 62 [2022-11-18 20:06:48,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:06:48,036 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 500 transitions. [2022-11-18 20:06:48,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.1923076923076925) internal successors, (109), 27 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:06:48,036 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 500 transitions. [2022-11-18 20:06:48,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-18 20:06:48,037 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:06:48,037 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:06:48,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:06:48,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-18 20:06:48,245 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:06:48,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:06:48,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1827605318, now seen corresponding path program 4 times [2022-11-18 20:06:48,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:06:48,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269300423] [2022-11-18 20:06:48,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:06:48,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:06:48,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:06:48,841 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 6 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:06:48,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:06:48,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269300423] [2022-11-18 20:06:48,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269300423] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:06:48,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049515982] [2022-11-18 20:06:48,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:06:48,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:06:48,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:06:48,843 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:06:48,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:06:48,979 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:06:48,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:06:48,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-18 20:06:48,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:06:49,040 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 [2022-11-18 20:06:57,945 INFO L321 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2022-11-18 20:06:57,946 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 50 treesize of output 39 [2022-11-18 20:06:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 4 proven. 49 refuted. 10 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-18 20:06:58,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:07:00,506 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 59 treesize of output 51 [2022-11-18 20:07:00,510 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 [2022-11-18 20:07:00,526 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 59 treesize of output 45 [2022-11-18 20:07:00,582 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 60 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-11-18 20:07:00,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049515982] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:07:00,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:07:00,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 26] total 63 [2022-11-18 20:07:00,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666376895] [2022-11-18 20:07:00,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:07:00,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-18 20:07:00,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:07:00,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-18 20:07:00,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=3687, Unknown=11, NotChecked=0, Total=4032 [2022-11-18 20:07:00,586 INFO L87 Difference]: Start difference. First operand 445 states and 500 transitions. Second operand has 64 states, 63 states have (on average 2.2698412698412698) internal successors, (143), 64 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:07:53,304 WARN L233 SmtUtils]: Spent 6.02s on a formula simplification. DAG size of input: 78 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:07:54,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:07:54,719 INFO L93 Difference]: Finished difference Result 723 states and 806 transitions. [2022-11-18 20:07:54,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-11-18 20:07:54,720 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 2.2698412698412698) internal successors, (143), 64 states have internal predecessors, (143), 0 states have call successors, (0), 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 64 [2022-11-18 20:07:54,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:07:54,728 INFO L225 Difference]: With dead ends: 723 [2022-11-18 20:07:54,728 INFO L226 Difference]: Without dead ends: 696 [2022-11-18 20:07:54,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3096 ImplicationChecksByTransitivity, 64.0s TimeCoverageRelationStatistics Valid=1378, Invalid=12875, Unknown=27, NotChecked=0, Total=14280 [2022-11-18 20:07:54,731 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 178 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 1481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 523 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:07:54,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 934 Invalid, 1481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 927 Invalid, 0 Unknown, 523 Unchecked, 0.7s Time] [2022-11-18 20:07:54,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-11-18 20:07:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 470. [2022-11-18 20:07:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 468 states have (on average 1.1303418803418803) internal successors, (529), 469 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:07:54,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 529 transitions. [2022-11-18 20:07:54,752 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 529 transitions. Word has length 64 [2022-11-18 20:07:54,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:07:54,753 INFO L495 AbstractCegarLoop]: Abstraction has 470 states and 529 transitions. [2022-11-18 20:07:54,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 2.2698412698412698) internal successors, (143), 64 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:07:54,753 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 529 transitions. [2022-11-18 20:07:54,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 20:07:54,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:07:54,755 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:07:54,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:07:54,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-18 20:07:54,961 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:07:54,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:07:54,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2087374261, now seen corresponding path program 5 times [2022-11-18 20:07:54,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:07:54,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377723286] [2022-11-18 20:07:54,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:07:54,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:07:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:07:55,662 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 6 proven. 106 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:07:55,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:07:55,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377723286] [2022-11-18 20:07:55,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377723286] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:07:55,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026916220] [2022-11-18 20:07:55,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:07:55,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:07:55,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:07:55,664 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:07:55,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:07:55,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-11-18 20:07:55,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:07:55,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-18 20:07:55,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:07:55,859 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:07:55,859 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 20:07:56,297 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:07:56,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:07:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:07:57,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026916220] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:07:57,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:07:57,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 41 [2022-11-18 20:07:57,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35078361] [2022-11-18 20:07:57,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:07:57,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-18 20:07:57,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:07:57,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-18 20:07:57,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=1505, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 20:07:57,090 INFO L87 Difference]: Start difference. First operand 470 states and 529 transitions. Second operand has 42 states, 41 states have (on average 3.975609756097561) internal successors, (163), 42 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:07:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:07:58,542 INFO L93 Difference]: Finished difference Result 690 states and 769 transitions. [2022-11-18 20:07:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:07:58,543 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.975609756097561) internal successors, (163), 42 states have internal predecessors, (163), 0 states have call successors, (0), 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 [2022-11-18 20:07:58,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:07:58,546 INFO L225 Difference]: With dead ends: 690 [2022-11-18 20:07:58,546 INFO L226 Difference]: Without dead ends: 690 [2022-11-18 20:07:58,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=784, Invalid=2756, Unknown=0, NotChecked=0, Total=3540 [2022-11-18 20:07:58,547 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 417 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:07:58,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 548 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:07:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2022-11-18 20:07:58,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 495. [2022-11-18 20:07:58,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 493 states have (on average 1.13184584178499) internal successors, (558), 494 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:07:58,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 558 transitions. [2022-11-18 20:07:58,561 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 558 transitions. Word has length 69 [2022-11-18 20:07:58,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:07:58,562 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 558 transitions. [2022-11-18 20:07:58,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.975609756097561) internal successors, (163), 42 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:07:58,562 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 558 transitions. [2022-11-18 20:07:58,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 20:07:58,563 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:07:58,564 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:07:58,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-18 20:07:58,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:07:58,771 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:07:58,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:07:58,772 INFO L85 PathProgramCache]: Analyzing trace with hash 24823664, now seen corresponding path program 3 times [2022-11-18 20:07:58,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:07:58,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518874412] [2022-11-18 20:07:58,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:07:58,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:07:58,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:08:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:08:02,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:08:02,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518874412] [2022-11-18 20:08:02,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518874412] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:08:02,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245872954] [2022-11-18 20:08:02,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:08:02,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:08:02,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:08:02,355 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:08:02,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:08:02,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-18 20:08:02,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:08:02,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-18 20:08:02,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:08:02,524 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 10 treesize of output 8 [2022-11-18 20:08:03,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2022-11-18 20:08:03,165 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 17 treesize of output 19 [2022-11-18 20:08:03,693 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 [2022-11-18 20:08:03,899 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:08:03,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:08:04,245 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:08:04,245 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-11-18 20:08:04,253 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:08:04,253 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 37 treesize of output 32 [2022-11-18 20:08:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 8 proven. 78 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:08:04,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245872954] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:08:04,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:08:04,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 18, 18] total 55 [2022-11-18 20:08:04,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778474458] [2022-11-18 20:08:04,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:08:04,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-18 20:08:04,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:08:04,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-18 20:08:04,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2820, Unknown=14, NotChecked=0, Total=2970 [2022-11-18 20:08:04,692 INFO L87 Difference]: Start difference. First operand 495 states and 558 transitions. Second operand has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 55 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:08:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:08:10,852 INFO L93 Difference]: Finished difference Result 897 states and 991 transitions. [2022-11-18 20:08:10,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-18 20:08:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 55 states have internal predecessors, (129), 0 states have call successors, (0), 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 70 [2022-11-18 20:08:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:08:10,856 INFO L225 Difference]: With dead ends: 897 [2022-11-18 20:08:10,857 INFO L226 Difference]: Without dead ends: 704 [2022-11-18 20:08:10,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 118 SyntacticMatches, 5 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=439, Invalid=8477, Unknown=14, NotChecked=0, Total=8930 [2022-11-18 20:08:10,859 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 316 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 3061 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 1906 SdHoareTripleChecker+Invalid, 3174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 3061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:08:10,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 1906 Invalid, 3174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 3061 Invalid, 0 Unknown, 80 Unchecked, 2.5s Time] [2022-11-18 20:08:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-11-18 20:08:10,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 563. [2022-11-18 20:08:10,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 561 states have (on average 1.1336898395721926) internal successors, (636), 562 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:08:10,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 636 transitions. [2022-11-18 20:08:10,875 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 636 transitions. Word has length 70 [2022-11-18 20:08:10,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:08:10,875 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 636 transitions. [2022-11-18 20:08:10,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 55 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:08:10,876 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 636 transitions. [2022-11-18 20:08:10,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-18 20:08:10,888 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:08:10,888 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:08:10,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:08:11,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-18 20:08:11,097 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:08:11,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:08:11,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1127410788, now seen corresponding path program 6 times [2022-11-18 20:08:11,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:08:11,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163433764] [2022-11-18 20:08:11,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:08:11,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:08:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:08:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 122 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:08:11,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:08:11,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163433764] [2022-11-18 20:08:11,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163433764] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:08:11,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271182616] [2022-11-18 20:08:11,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:08:11,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:08:11,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:08:12,003 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:08:12,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:08:12,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-11-18 20:08:12,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:08:12,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-18 20:08:12,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:08:12,461 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 [2022-11-18 20:08:12,874 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 [2022-11-18 20:08:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 122 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:08:12,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:08:13,098 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 [2022-11-18 20:08:13,101 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 [2022-11-18 20:08:13,310 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 20 proven. 122 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:08:13,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271182616] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:08:13,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:08:13,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 36 [2022-11-18 20:08:13,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858667651] [2022-11-18 20:08:13,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:08:13,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:08:13,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:08:13,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:08:13,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2022-11-18 20:08:13,313 INFO L87 Difference]: Start difference. First operand 563 states and 636 transitions. Second operand has 36 states, 36 states have (on average 3.4722222222222223) internal successors, (125), 36 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) [2022-11-18 20:08:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:08:14,677 INFO L93 Difference]: Finished difference Result 1022 states and 1131 transitions. [2022-11-18 20:08:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:08:14,677 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4722222222222223) internal successors, (125), 36 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 74 [2022-11-18 20:08:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:08:14,680 INFO L225 Difference]: With dead ends: 1022 [2022-11-18 20:08:14,680 INFO L226 Difference]: Without dead ends: 793 [2022-11-18 20:08:14,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=383, Invalid=2373, Unknown=0, NotChecked=0, Total=2756 [2022-11-18 20:08:14,682 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 303 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 1138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:08:14,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 1258 Invalid, 1138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1097 Invalid, 0 Unknown, 35 Unchecked, 0.7s Time] [2022-11-18 20:08:14,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-11-18 20:08:14,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 700. [2022-11-18 20:08:14,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 698 states have (on average 1.1318051575931232) internal successors, (790), 699 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:08:14,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 790 transitions. [2022-11-18 20:08:14,701 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 790 transitions. Word has length 74 [2022-11-18 20:08:14,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:08:14,701 INFO L495 AbstractCegarLoop]: Abstraction has 700 states and 790 transitions. [2022-11-18 20:08:14,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.4722222222222223) internal successors, (125), 36 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) [2022-11-18 20:08:14,702 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 790 transitions. [2022-11-18 20:08:14,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-18 20:08:14,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:08:14,703 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:08:14,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:08:14,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-18 20:08:14,915 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:08:14,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:08:14,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1353351373, now seen corresponding path program 4 times [2022-11-18 20:08:14,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:08:14,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800914239] [2022-11-18 20:08:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:08:14,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:08:14,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:08:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 6 proven. 93 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-18 20:08:15,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:08:15,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800914239] [2022-11-18 20:08:15,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800914239] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:08:15,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715813924] [2022-11-18 20:08:15,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:08:15,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:08:15,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:08:15,543 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:08:15,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:08:15,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:08:15,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:08:15,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 136 conjunts are in the unsatisfiable core [2022-11-18 20:08:15,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:08:15,785 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 [2022-11-18 20:08:15,841 INFO L321 Elim1Store]: treesize reduction 36, result has 21.7 percent of original size [2022-11-18 20:08:15,841 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 25 treesize of output 24 [2022-11-18 20:08:20,076 INFO L321 Elim1Store]: treesize reduction 72, result has 63.8 percent of original size [2022-11-18 20:08:20,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 153 [2022-11-18 20:08:20,621 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 44 proven. 29 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-18 20:08:20,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:08:25,462 INFO L321 Elim1Store]: treesize reduction 106, result has 32.1 percent of original size [2022-11-18 20:08:25,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 586 treesize of output 470 [2022-11-18 20:08:25,491 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:08:25,491 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 412 treesize of output 384 [2022-11-18 20:08:25,512 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 [2022-11-18 20:08:25,627 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-11-18 20:08:25,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 365 treesize of output 346 [2022-11-18 20:08:25,742 INFO L321 Elim1Store]: treesize reduction 15, result has 82.8 percent of original size [2022-11-18 20:08:25,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 172 treesize of output 204 [2022-11-18 20:08:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-18 20:08:26,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715813924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:08:26,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:08:26,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 34, 33] total 76 [2022-11-18 20:08:26,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811403049] [2022-11-18 20:08:26,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:08:26,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-11-18 20:08:26,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:08:26,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-11-18 20:08:26,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=5340, Unknown=0, NotChecked=0, Total=5852 [2022-11-18 20:08:26,114 INFO L87 Difference]: Start difference. First operand 700 states and 790 transitions. Second operand has 77 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:08:33,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:08:33,612 INFO L93 Difference]: Finished difference Result 923 states and 1032 transitions. [2022-11-18 20:08:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-11-18 20:08:33,613 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 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 74 [2022-11-18 20:08:33,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:08:33,615 INFO L225 Difference]: With dead ends: 923 [2022-11-18 20:08:33,615 INFO L226 Difference]: Without dead ends: 488 [2022-11-18 20:08:33,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4164 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=1700, Invalid=15592, Unknown=0, NotChecked=0, Total=17292 [2022-11-18 20:08:33,617 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:08:33,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1126 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 638 Invalid, 0 Unknown, 190 Unchecked, 0.5s Time] [2022-11-18 20:08:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-11-18 20:08:33,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 295. [2022-11-18 20:08:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.1156462585034013) internal successors, (328), 294 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) [2022-11-18 20:08:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 328 transitions. [2022-11-18 20:08:33,626 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 328 transitions. Word has length 74 [2022-11-18 20:08:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:08:33,626 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 328 transitions. [2022-11-18 20:08:33,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 2.0657894736842106) internal successors, (157), 77 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:08:33,626 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 328 transitions. [2022-11-18 20:08:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-18 20:08:33,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:08:33,628 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:08:33,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-18 20:08:33,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-18 20:08:33,836 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:08:33,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:08:33,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1242676025, now seen corresponding path program 7 times [2022-11-18 20:08:33,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:08:33,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482788532] [2022-11-18 20:08:33,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:08:33,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:08:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:08:34,702 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 15 proven. 144 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:08:34,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:08:34,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482788532] [2022-11-18 20:08:34,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482788532] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:08:34,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242805079] [2022-11-18 20:08:34,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:08:34,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:08:34,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:08:34,707 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:08:34,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-18 20:08:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:08:34,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 20:08:34,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:08:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 28 proven. 131 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:08:35,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:08:35,960 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 [2022-11-18 20:08:36,100 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 28 proven. 131 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:08:36,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242805079] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:08:36,101 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:08:36,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 38 [2022-11-18 20:08:36,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293607513] [2022-11-18 20:08:36,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:08:36,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 20:08:36,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:08:36,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 20:08:36,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1328, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 20:08:36,103 INFO L87 Difference]: Start difference. First operand 295 states and 328 transitions. Second operand has 39 states, 38 states have (on average 4.052631578947368) internal successors, (154), 39 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) [2022-11-18 20:08:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:08:37,305 INFO L93 Difference]: Finished difference Result 485 states and 537 transitions. [2022-11-18 20:08:37,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:08:37,306 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 4.052631578947368) internal successors, (154), 39 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 78 [2022-11-18 20:08:37,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:08:37,308 INFO L225 Difference]: With dead ends: 485 [2022-11-18 20:08:37,308 INFO L226 Difference]: Without dead ends: 485 [2022-11-18 20:08:37,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 129 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=579, Invalid=2391, Unknown=0, NotChecked=0, Total=2970 [2022-11-18 20:08:37,310 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 302 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:08:37,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 550 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:08:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-11-18 20:08:37,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 315. [2022-11-18 20:08:37,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.1178343949044587) internal successors, (351), 314 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:08:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 351 transitions. [2022-11-18 20:08:37,318 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 351 transitions. Word has length 78 [2022-11-18 20:08:37,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:08:37,319 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 351 transitions. [2022-11-18 20:08:37,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 4.052631578947368) internal successors, (154), 39 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) [2022-11-18 20:08:37,319 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 351 transitions. [2022-11-18 20:08:37,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-18 20:08:37,320 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:08:37,321 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:08:37,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-18 20:08:37,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-18 20:08:37,527 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:08:37,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:08:37,528 INFO L85 PathProgramCache]: Analyzing trace with hash -726533992, now seen corresponding path program 8 times [2022-11-18 20:08:37,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:08:37,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133859687] [2022-11-18 20:08:37,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:08:37,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:08:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:08:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 23 proven. 173 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:08:38,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:08:38,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133859687] [2022-11-18 20:08:38,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133859687] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:08:38,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640533432] [2022-11-18 20:08:38,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:08:38,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:08:38,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:08:38,405 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:08:38,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-18 20:08:38,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:08:38,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:08:38,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-18 20:08:38,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:08:38,832 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 [2022-11-18 20:08:39,207 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 [2022-11-18 20:08:39,212 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 23 proven. 173 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:08:39,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:08:39,391 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 [2022-11-18 20:08:39,393 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 [2022-11-18 20:08:39,563 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 23 proven. 173 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:08:39,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640533432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:08:39,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:08:39,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 39 [2022-11-18 20:08:39,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31409869] [2022-11-18 20:08:39,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:08:39,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-18 20:08:39,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:08:39,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-18 20:08:39,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1363, Unknown=0, NotChecked=0, Total=1482 [2022-11-18 20:08:39,565 INFO L87 Difference]: Start difference. First operand 315 states and 351 transitions. Second operand has 39 states, 39 states have (on average 3.5384615384615383) internal successors, (138), 39 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:08:40,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:08:40,827 INFO L93 Difference]: Finished difference Result 665 states and 731 transitions. [2022-11-18 20:08:40,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-18 20:08:40,828 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.5384615384615383) internal successors, (138), 39 states have internal predecessors, (138), 0 states have call successors, (0), 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 83 [2022-11-18 20:08:40,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:08:40,829 INFO L225 Difference]: With dead ends: 665 [2022-11-18 20:08:40,829 INFO L226 Difference]: Without dead ends: 343 [2022-11-18 20:08:40,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=418, Invalid=2888, Unknown=0, NotChecked=0, Total=3306 [2022-11-18 20:08:40,831 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 314 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 805 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:08:40,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 805 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 899 Invalid, 0 Unknown, 57 Unchecked, 0.5s Time] [2022-11-18 20:08:40,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-11-18 20:08:40,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 331. [2022-11-18 20:08:40,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.112121212121212) internal successors, (367), 330 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:08:40,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 367 transitions. [2022-11-18 20:08:40,837 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 367 transitions. Word has length 83 [2022-11-18 20:08:40,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:08:40,838 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 367 transitions. [2022-11-18 20:08:40,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.5384615384615383) internal successors, (138), 39 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:08:40,838 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 367 transitions. [2022-11-18 20:08:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-18 20:08:40,839 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:08:40,839 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:08:40,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-18 20:08:41,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:08:41,045 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:08:41,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:08:41,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1379692133, now seen corresponding path program 9 times [2022-11-18 20:08:41,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:08:41,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219996385] [2022-11-18 20:08:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:08:41,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:08:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:08:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 28 proven. 189 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:08:42,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:08:42,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219996385] [2022-11-18 20:08:42,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219996385] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:08:42,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663897814] [2022-11-18 20:08:42,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:08:42,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:08:42,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:08:42,043 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:08:42,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-18 20:08:42,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-18 20:08:42,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:08:42,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 62 conjunts are in the unsatisfiable core [2022-11-18 20:08:42,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:08:42,866 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 45 proven. 172 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:08:42,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:08:43,505 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 [2022-11-18 20:08:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 45 proven. 172 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:08:43,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663897814] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:08:43,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:08:43,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2022-11-18 20:08:43,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231810840] [2022-11-18 20:08:43,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:08:43,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-18 20:08:43,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:08:43,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-18 20:08:43,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=2159, Unknown=0, NotChecked=0, Total=2450 [2022-11-18 20:08:43,680 INFO L87 Difference]: Start difference. First operand 331 states and 367 transitions. Second operand has 50 states, 49 states have (on average 4.122448979591836) internal successors, (202), 50 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) [2022-11-18 20:08:45,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:08:45,251 INFO L93 Difference]: Finished difference Result 553 states and 612 transitions. [2022-11-18 20:08:45,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-18 20:08:45,252 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 4.122448979591836) internal successors, (202), 50 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 87 [2022-11-18 20:08:45,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:08:45,254 INFO L225 Difference]: With dead ends: 553 [2022-11-18 20:08:45,254 INFO L226 Difference]: Without dead ends: 553 [2022-11-18 20:08:45,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 137 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1218 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=884, Invalid=3672, Unknown=0, NotChecked=0, Total=4556 [2022-11-18 20:08:45,256 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 483 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:08:45,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 640 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 766 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-18 20:08:45,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-11-18 20:08:45,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 351. [2022-11-18 20:08:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.1142857142857143) internal successors, (390), 350 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:08:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 390 transitions. [2022-11-18 20:08:45,282 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 390 transitions. Word has length 87 [2022-11-18 20:08:45,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:08:45,284 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 390 transitions. [2022-11-18 20:08:45,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 4.122448979591836) internal successors, (202), 50 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) [2022-11-18 20:08:45,285 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 390 transitions. [2022-11-18 20:08:45,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-18 20:08:45,286 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:08:45,286 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 8, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:08:45,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-18 20:08:45,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-18 20:08:45,493 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:08:45,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:08:45,494 INFO L85 PathProgramCache]: Analyzing trace with hash -336539786, now seen corresponding path program 10 times [2022-11-18 20:08:45,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:08:45,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63181946] [2022-11-18 20:08:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:08:45,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:08:45,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:08:46,521 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 26 proven. 233 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:08:46,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:08:46,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63181946] [2022-11-18 20:08:46,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63181946] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:08:46,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49474002] [2022-11-18 20:08:46,522 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:08:46,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:08:46,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:08:46,523 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:08:46,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-18 20:08:46,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:08:46,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:08:46,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 132 conjunts are in the unsatisfiable core [2022-11-18 20:08:46,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:08:47,070 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 [2022-11-18 20:09:15,907 INFO L321 Elim1Store]: treesize reduction 29, result has 49.1 percent of original size [2022-11-18 20:09:15,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 78 treesize of output 58 [2022-11-18 20:09:15,910 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2022-11-18 20:09:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 34 proven. 198 refuted. 35 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:09:15,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:09:22,238 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 104 treesize of output 90 [2022-11-18 20:09:22,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:09:22,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 104 treesize of output 78 [2022-11-18 20:09:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 92 proven. 175 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:09:23,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49474002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:09:23,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:09:23,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 45, 45] total 103 [2022-11-18 20:09:23,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867287283] [2022-11-18 20:09:23,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:09:23,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-11-18 20:09:23,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:09:23,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-11-18 20:09:23,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=9848, Unknown=30, NotChecked=0, Total=10506 [2022-11-18 20:09:23,337 INFO L87 Difference]: Start difference. First operand 351 states and 390 transitions. Second operand has 103 states, 103 states have (on average 2.3592233009708736) internal successors, (243), 103 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:11,577 WARN L233 SmtUtils]: Spent 8.56s on a formula simplification. DAG size of input: 124 DAG size of output: 91 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 20:10:11,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:11,584 INFO L93 Difference]: Finished difference Result 934 states and 1024 transitions. [2022-11-18 20:10:11,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-18 20:10:11,585 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.3592233009708736) internal successors, (243), 103 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-11-18 20:10:11,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:11,586 INFO L225 Difference]: With dead ends: 934 [2022-11-18 20:10:11,586 INFO L226 Difference]: Without dead ends: 379 [2022-11-18 20:10:11,587 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 149 SyntacticMatches, 8 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6002 ImplicationChecksByTransitivity, 81.7s TimeCoverageRelationStatistics Valid=3139, Invalid=22908, Unknown=35, NotChecked=0, Total=26082 [2022-11-18 20:10:11,587 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 737 mSDsluCounter, 2147 mSDsCounter, 0 mSdLazyCounter, 2229 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 737 SdHoareTripleChecker+Valid, 2202 SdHoareTripleChecker+Invalid, 3826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1546 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:11,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [737 Valid, 2202 Invalid, 3826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2229 Invalid, 0 Unknown, 1546 Unchecked, 1.5s Time] [2022-11-18 20:10:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-11-18 20:10:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 367. [2022-11-18 20:10:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.1092896174863387) internal successors, (406), 366 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 406 transitions. [2022-11-18 20:10:11,593 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 406 transitions. Word has length 92 [2022-11-18 20:10:11,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:11,593 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 406 transitions. [2022-11-18 20:10:11,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.3592233009708736) internal successors, (243), 103 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:11,594 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 406 transitions. [2022-11-18 20:10:11,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-18 20:10:11,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:11,595 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 8, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:11,608 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-11-18 20:10:11,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-18 20:10:11,802 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:10:11,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:11,803 INFO L85 PathProgramCache]: Analyzing trace with hash 2004330963, now seen corresponding path program 11 times [2022-11-18 20:10:11,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:11,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143576501] [2022-11-18 20:10:11,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:11,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:12,635 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 45 proven. 239 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:12,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:12,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143576501] [2022-11-18 20:10:12,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143576501] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:10:12,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079690575] [2022-11-18 20:10:12,636 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:10:12,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:12,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:12,637 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:12,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-18 20:10:12,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-18 20:10:12,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:10:12,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 87 conjunts are in the unsatisfiable core [2022-11-18 20:10:12,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:12,869 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:10:12,869 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 20:10:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 66 proven. 218 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:13,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:10:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 66 proven. 218 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:14,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079690575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:10:14,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:10:14,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 54 [2022-11-18 20:10:14,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038765908] [2022-11-18 20:10:14,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:10:14,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-18 20:10:14,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:14,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-18 20:10:14,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=2586, Unknown=0, NotChecked=0, Total=2970 [2022-11-18 20:10:14,960 INFO L87 Difference]: Start difference. First operand 367 states and 406 transitions. Second operand has 55 states, 54 states have (on average 4.203703703703703) internal successors, (227), 55 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:16,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:16,304 INFO L93 Difference]: Finished difference Result 621 states and 687 transitions. [2022-11-18 20:10:16,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-18 20:10:16,305 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 4.203703703703703) internal successors, (227), 55 states have internal predecessors, (227), 0 states have call successors, (0), 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 [2022-11-18 20:10:16,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:16,307 INFO L225 Difference]: With dead ends: 621 [2022-11-18 20:10:16,307 INFO L226 Difference]: Without dead ends: 621 [2022-11-18 20:10:16,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1215, Invalid=4335, Unknown=0, NotChecked=0, Total=5550 [2022-11-18 20:10:16,308 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 586 mSDsluCounter, 774 mSDsCounter, 0 mSdLazyCounter, 1041 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:16,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [586 Valid, 831 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1041 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-18 20:10:16,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-11-18 20:10:16,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 387. [2022-11-18 20:10:16,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 1.11139896373057) internal successors, (429), 386 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:16,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 429 transitions. [2022-11-18 20:10:16,317 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 429 transitions. Word has length 96 [2022-11-18 20:10:16,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:16,317 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 429 transitions. [2022-11-18 20:10:16,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 4.203703703703703) internal successors, (227), 55 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:16,318 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 429 transitions. [2022-11-18 20:10:16,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-18 20:10:16,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:16,319 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:16,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-18 20:10:16,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:16,526 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:10:16,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1721440830, now seen corresponding path program 12 times [2022-11-18 20:10:16,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:16,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109455822] [2022-11-18 20:10:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:16,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:17,584 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 29 proven. 302 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:17,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:17,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109455822] [2022-11-18 20:10:17,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109455822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:10:17,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828468203] [2022-11-18 20:10:17,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:10:17,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:17,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:17,586 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:17,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-18 20:10:17,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-11-18 20:10:17,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:10:17,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-18 20:10:17,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:18,246 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 [2022-11-18 20:10:18,696 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 [2022-11-18 20:10:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 29 proven. 302 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:18,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:10:18,939 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 [2022-11-18 20:10:18,942 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 [2022-11-18 20:10:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 29 proven. 302 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:19,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828468203] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:10:19,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:10:19,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 45 [2022-11-18 20:10:19,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312696522] [2022-11-18 20:10:19,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:10:19,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-18 20:10:19,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:19,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-18 20:10:19,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1845, Unknown=0, NotChecked=0, Total=1980 [2022-11-18 20:10:19,171 INFO L87 Difference]: Start difference. First operand 387 states and 429 transitions. Second operand has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:21,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:21,336 INFO L93 Difference]: Finished difference Result 841 states and 927 transitions. [2022-11-18 20:10:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 20:10:21,336 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 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 101 [2022-11-18 20:10:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:21,338 INFO L225 Difference]: With dead ends: 841 [2022-11-18 20:10:21,338 INFO L226 Difference]: Without dead ends: 415 [2022-11-18 20:10:21,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 181 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=488, Invalid=4068, Unknown=0, NotChecked=0, Total=4556 [2022-11-18 20:10:21,339 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 476 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:21,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 1505 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1701 Invalid, 0 Unknown, 57 Unchecked, 1.0s Time] [2022-11-18 20:10:21,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-11-18 20:10:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 403. [2022-11-18 20:10:21,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.1069651741293531) internal successors, (445), 402 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:21,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 445 transitions. [2022-11-18 20:10:21,347 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 445 transitions. Word has length 101 [2022-11-18 20:10:21,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:21,347 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 445 transitions. [2022-11-18 20:10:21,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:21,348 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 445 transitions. [2022-11-18 20:10:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-11-18 20:10:21,349 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:21,349 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:21,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-18 20:10:21,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:21,557 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:10:21,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:21,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1160275839, now seen corresponding path program 13 times [2022-11-18 20:10:21,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:21,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71804060] [2022-11-18 20:10:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:21,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 66 proven. 294 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:22,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:22,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71804060] [2022-11-18 20:10:22,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71804060] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:10:22,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892414082] [2022-11-18 20:10:22,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:10:22,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:22,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:22,603 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:22,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-18 20:10:22,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:22,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-18 20:10:22,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 91 proven. 269 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:23,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:10:24,131 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 [2022-11-18 20:10:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 91 proven. 269 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:24,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892414082] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:10:24,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:10:24,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 50 [2022-11-18 20:10:24,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234646310] [2022-11-18 20:10:24,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:10:24,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-18 20:10:24,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:24,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-18 20:10:24,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=2288, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 20:10:24,431 INFO L87 Difference]: Start difference. First operand 403 states and 445 transitions. Second operand has 51 states, 50 states have (on average 4.16) internal successors, (208), 51 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:26,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:26,580 INFO L93 Difference]: Finished difference Result 689 states and 762 transitions. [2022-11-18 20:10:26,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 20:10:26,581 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.16) internal successors, (208), 51 states have internal predecessors, (208), 0 states have call successors, (0), 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 [2022-11-18 20:10:26,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:26,582 INFO L225 Difference]: With dead ends: 689 [2022-11-18 20:10:26,582 INFO L226 Difference]: Without dead ends: 689 [2022-11-18 20:10:26,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 174 SyntacticMatches, 9 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1345 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1017, Invalid=4239, Unknown=0, NotChecked=0, Total=5256 [2022-11-18 20:10:26,583 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 413 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:26,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 970 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-18 20:10:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2022-11-18 20:10:26,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 423. [2022-11-18 20:10:26,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.1090047393364928) internal successors, (468), 422 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) [2022-11-18 20:10:26,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 468 transitions. [2022-11-18 20:10:26,593 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 468 transitions. Word has length 105 [2022-11-18 20:10:26,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:26,593 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 468 transitions. [2022-11-18 20:10:26,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.16) internal successors, (208), 51 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:26,594 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 468 transitions. [2022-11-18 20:10:26,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-18 20:10:26,595 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:26,595 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:26,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-11-18 20:10:26,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-11-18 20:10:26,801 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:10:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1326766000, now seen corresponding path program 14 times [2022-11-18 20:10:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:26,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970258028] [2022-11-18 20:10:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:26,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:28,203 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 32 proven. 380 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:28,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:28,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970258028] [2022-11-18 20:10:28,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970258028] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:10:28,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036342307] [2022-11-18 20:10:28,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:10:28,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:28,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:28,204 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:28,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-18 20:10:28,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:10:28,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:10:28,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 107 conjunts are in the unsatisfiable core [2022-11-18 20:10:28,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:28,669 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 [2022-11-18 20:10:30,385 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:10:30,386 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 17 [2022-11-18 20:10:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 91 proven. 321 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:30,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:10:32,918 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 [2022-11-18 20:10:32,924 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 [2022-11-18 20:10:32,928 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 [2022-11-18 20:10:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 91 proven. 321 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:33,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036342307] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:10:33,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:10:33,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 72 [2022-11-18 20:10:33,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405278793] [2022-11-18 20:10:33,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:10:33,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-18 20:10:33,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:33,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-18 20:10:33,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=4785, Unknown=0, NotChecked=0, Total=5112 [2022-11-18 20:10:33,181 INFO L87 Difference]: Start difference. First operand 423 states and 468 transitions. Second operand has 72 states, 72 states have (on average 3.6527777777777777) internal successors, (263), 72 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:44,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:44,553 INFO L93 Difference]: Finished difference Result 1163 states and 1294 transitions. [2022-11-18 20:10:44,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-18 20:10:44,553 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.6527777777777777) internal successors, (263), 72 states have internal predecessors, (263), 0 states have call successors, (0), 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 110 [2022-11-18 20:10:44,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:44,555 INFO L225 Difference]: With dead ends: 1163 [2022-11-18 20:10:44,555 INFO L226 Difference]: Without dead ends: 715 [2022-11-18 20:10:44,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 185 SyntacticMatches, 9 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3898 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=1053, Invalid=13467, Unknown=0, NotChecked=0, Total=14520 [2022-11-18 20:10:44,556 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 390 mSDsluCounter, 1742 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 1806 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 435 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:44,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 1806 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 832 Invalid, 0 Unknown, 435 Unchecked, 0.5s Time] [2022-11-18 20:10:44,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2022-11-18 20:10:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 459. [2022-11-18 20:10:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 1.1069868995633187) internal successors, (507), 458 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 507 transitions. [2022-11-18 20:10:44,565 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 507 transitions. Word has length 110 [2022-11-18 20:10:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:44,566 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 507 transitions. [2022-11-18 20:10:44,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.6527777777777777) internal successors, (263), 72 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:44,566 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 507 transitions. [2022-11-18 20:10:44,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-11-18 20:10:44,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:44,568 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:44,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-18 20:10:44,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:44,774 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:10:44,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:44,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1293357340, now seen corresponding path program 15 times [2022-11-18 20:10:44,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:44,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779877127] [2022-11-18 20:10:44,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:44,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 35 proven. 467 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:45,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:45,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779877127] [2022-11-18 20:10:45,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779877127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:10:45,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975600968] [2022-11-18 20:10:45,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:10:45,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:45,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:45,996 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:45,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-18 20:10:46,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-18 20:10:46,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:10:46,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 120 conjunts are in the unsatisfiable core [2022-11-18 20:10:46,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:46,734 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 [2022-11-18 20:10:47,134 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 [2022-11-18 20:10:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 35 proven. 467 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:47,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:10:47,357 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 [2022-11-18 20:10:47,359 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 [2022-11-18 20:10:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 511 backedges. 35 proven. 467 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:10:47,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975600968] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:10:47,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:10:47,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 51 [2022-11-18 20:10:47,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386715358] [2022-11-18 20:10:47,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:10:47,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-18 20:10:47,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:47,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-18 20:10:47,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2399, Unknown=0, NotChecked=0, Total=2550 [2022-11-18 20:10:47,606 INFO L87 Difference]: Start difference. First operand 459 states and 507 transitions. Second operand has 51 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 51 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:49,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:49,990 INFO L93 Difference]: Finished difference Result 1017 states and 1123 transitions. [2022-11-18 20:10:49,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-18 20:10:49,991 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 51 states have internal predecessors, (190), 0 states have call successors, (0), 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 119 [2022-11-18 20:10:49,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:49,993 INFO L225 Difference]: With dead ends: 1017 [2022-11-18 20:10:49,993 INFO L226 Difference]: Without dead ends: 487 [2022-11-18 20:10:49,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 215 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=558, Invalid=5448, Unknown=0, NotChecked=0, Total=6006 [2022-11-18 20:10:49,994 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 422 mSDsluCounter, 2006 mSDsCounter, 0 mSdLazyCounter, 2476 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 2074 SdHoareTripleChecker+Invalid, 2487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:49,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 2074 Invalid, 2487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2476 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-18 20:10:49,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-11-18 20:10:50,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 475. [2022-11-18 20:10:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 474 states have (on average 1.1033755274261603) internal successors, (523), 474 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 523 transitions. [2022-11-18 20:10:50,015 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 523 transitions. Word has length 119 [2022-11-18 20:10:50,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:50,017 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 523 transitions. [2022-11-18 20:10:50,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.7254901960784315) internal successors, (190), 51 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:10:50,017 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 523 transitions. [2022-11-18 20:10:50,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-18 20:10:50,019 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:50,019 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:50,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-18 20:10:50,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-18 20:10:50,225 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:10:50,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:50,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1613135257, now seen corresponding path program 16 times [2022-11-18 20:10:50,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:50,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235303858] [2022-11-18 20:10:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:50,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:50,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:10:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 120 proven. 421 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 20:10:51,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:51,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235303858] [2022-11-18 20:10:51,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235303858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:10:51,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654455257] [2022-11-18 20:10:51,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:10:51,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:51,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:51,310 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:51,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-18 20:10:51,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:10:51,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:10:51,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 170 conjunts are in the unsatisfiable core [2022-11-18 20:10:51,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:51,589 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 [2022-11-18 20:11:00,865 INFO L321 Elim1Store]: treesize reduction 36, result has 86.8 percent of original size [2022-11-18 20:11:00,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 29 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 26 case distinctions, treesize of input 108 treesize of output 278 [2022-11-18 20:11:01,048 WARN L718 sPolynomialRelations]: Constructing 1024(two to the power of 10 dual juncts. [2022-11-18 20:11:01,155 WARN L718 sPolynomialRelations]: Constructing 512(two to the power of 9 dual juncts. [2022-11-18 20:11:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 129 proven. 228 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-18 20:11:01,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:13,229 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 149 treesize of output 129 [2022-11-18 20:11:13,365 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:11:13,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 29 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 16 case distinctions, treesize of input 229 treesize of output 351 [2022-11-18 20:11:13,399 WARN L718 sPolynomialRelations]: Constructing 1024(two to the power of 10 dual juncts. [2022-11-18 20:11:13,503 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 99 treesize of output 81 [2022-11-18 20:11:13,748 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 3 proven. 354 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-11-18 20:11:13,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654455257] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:13,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:11:13,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 51, 51] total 127 [2022-11-18 20:11:13,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568777262] [2022-11-18 20:11:13,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:13,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-11-18 20:11:13,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:13,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-11-18 20:11:13,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1308, Invalid=14948, Unknown=0, NotChecked=0, Total=16256 [2022-11-18 20:11:13,751 INFO L87 Difference]: Start difference. First operand 475 states and 523 transitions. Second operand has 128 states, 127 states have (on average 2.125984251968504) internal successors, (270), 128 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) [2022-11-18 20:11:45,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:11:45,551 INFO L93 Difference]: Finished difference Result 1123 states and 1244 transitions. [2022-11-18 20:11:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-11-18 20:11:45,552 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 127 states have (on average 2.125984251968504) internal successors, (270), 128 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) Word has length 123 [2022-11-18 20:11:45,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:11:45,556 INFO L225 Difference]: With dead ends: 1123 [2022-11-18 20:11:45,556 INFO L226 Difference]: Without dead ends: 1066 [2022-11-18 20:11:45,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 209 SyntacticMatches, 6 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14647 ImplicationChecksByTransitivity, 46.6s TimeCoverageRelationStatistics Valid=5382, Invalid=44124, Unknown=0, NotChecked=0, Total=49506 [2022-11-18 20:11:45,560 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 1003 mSDsluCounter, 3064 mSDsCounter, 0 mSdLazyCounter, 2511 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1003 SdHoareTripleChecker+Valid, 3151 SdHoareTripleChecker+Invalid, 4373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1729 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:11:45,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1003 Valid, 3151 Invalid, 4373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2511 Invalid, 0 Unknown, 1729 Unchecked, 2.4s Time] [2022-11-18 20:11:45,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2022-11-18 20:11:45,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 565. [2022-11-18 20:11:45,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 564 states have (on average 1.1081560283687943) internal successors, (625), 564 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:11:45,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 625 transitions. [2022-11-18 20:11:45,575 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 625 transitions. Word has length 123 [2022-11-18 20:11:45,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:11:45,575 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 625 transitions. [2022-11-18 20:11:45,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 127 states have (on average 2.125984251968504) internal successors, (270), 128 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) [2022-11-18 20:11:45,576 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 625 transitions. [2022-11-18 20:11:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-18 20:11:45,578 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:11:45,578 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 13, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:11:45,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-11-18 20:11:45,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-18 20:11:45,785 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:11:45,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:11:45,785 INFO L85 PathProgramCache]: Analyzing trace with hash 130568957, now seen corresponding path program 17 times [2022-11-18 20:11:45,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:11:45,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305470940] [2022-11-18 20:11:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:11:45,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:11:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:11:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 41 proven. 617 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:11:47,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:11:47,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305470940] [2022-11-18 20:11:47,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305470940] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:11:47,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877807736] [2022-11-18 20:11:47,602 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:11:47,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:11:47,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:11:47,603 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:11:47,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-18 20:11:47,927 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-18 20:11:47,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:11:47,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 131 conjunts are in the unsatisfiable core [2022-11-18 20:11:47,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:11:47,958 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:11:47,959 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 20:11:48,590 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 14 treesize of output 10 [2022-11-18 20:11:50,683 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:11:50,683 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 15 [2022-11-18 20:11:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 153 proven. 505 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:11:51,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:11:53,607 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 [2022-11-18 20:11:53,612 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 [2022-11-18 20:11:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 153 proven. 505 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:11:56,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877807736] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:11:56,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:11:56,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 93 [2022-11-18 20:11:56,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847662502] [2022-11-18 20:11:56,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:11:56,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-11-18 20:11:56,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:11:56,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-11-18 20:11:56,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=7897, Unknown=0, NotChecked=0, Total=8556 [2022-11-18 20:11:56,274 INFO L87 Difference]: Start difference. First operand 565 states and 625 transitions. Second operand has 93 states, 93 states have (on average 3.849462365591398) internal successors, (358), 93 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:24,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:12:24,677 INFO L93 Difference]: Finished difference Result 1483 states and 1652 transitions. [2022-11-18 20:12:24,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-18 20:12:24,677 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.849462365591398) internal successors, (358), 93 states have internal predecessors, (358), 0 states have call successors, (0), 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 133 [2022-11-18 20:12:24,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:12:24,683 INFO L225 Difference]: With dead ends: 1483 [2022-11-18 20:12:24,683 INFO L226 Difference]: Without dead ends: 891 [2022-11-18 20:12:24,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5829 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=1673, Invalid=20677, Unknown=0, NotChecked=0, Total=22350 [2022-11-18 20:12:24,685 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 513 mSDsluCounter, 3142 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 3218 SdHoareTripleChecker+Invalid, 1914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 497 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:12:24,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 3218 Invalid, 1914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1404 Invalid, 0 Unknown, 497 Unchecked, 1.1s Time] [2022-11-18 20:12:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2022-11-18 20:12:24,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 601. [2022-11-18 20:12:24,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 1.1066666666666667) internal successors, (664), 600 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:24,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 664 transitions. [2022-11-18 20:12:24,700 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 664 transitions. Word has length 133 [2022-11-18 20:12:24,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:12:24,700 INFO L495 AbstractCegarLoop]: Abstraction has 601 states and 664 transitions. [2022-11-18 20:12:24,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.849462365591398) internal successors, (358), 93 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:24,701 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 664 transitions. [2022-11-18 20:12:24,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-18 20:12:24,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:12:24,703 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 14, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:12:24,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-18 20:12:24,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:24,912 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:12:24,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:12:24,913 INFO L85 PathProgramCache]: Analyzing trace with hash 904977137, now seen corresponding path program 18 times [2022-11-18 20:12:24,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:12:24,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657928873] [2022-11-18 20:12:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:12:24,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:12:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:12:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 44 proven. 727 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:12:27,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:12:27,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657928873] [2022-11-18 20:12:27,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657928873] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:12:27,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237954986] [2022-11-18 20:12:27,047 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:12:27,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:27,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:12:27,048 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:12:27,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-18 20:12:27,632 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-11-18 20:12:27,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:12:27,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 140 conjunts are in the unsatisfiable core [2022-11-18 20:12:27,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:12:28,295 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 [2022-11-18 20:12:28,915 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 [2022-11-18 20:12:28,920 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 44 proven. 727 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:12:28,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:12:29,252 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 [2022-11-18 20:12:29,255 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 [2022-11-18 20:12:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 790 backedges. 44 proven. 727 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:12:29,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237954986] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:12:29,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:12:29,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 33, 33] total 57 [2022-11-18 20:12:29,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501711626] [2022-11-18 20:12:29,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:12:29,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-18 20:12:29,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:12:29,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-18 20:12:29,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3025, Unknown=0, NotChecked=0, Total=3192 [2022-11-18 20:12:29,567 INFO L87 Difference]: Start difference. First operand 601 states and 664 transitions. Second operand has 57 states, 57 states have (on average 3.789473684210526) internal successors, (216), 57 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:33,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:12:33,539 INFO L93 Difference]: Finished difference Result 1310 states and 1450 transitions. [2022-11-18 20:12:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-18 20:12:33,539 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.789473684210526) internal successors, (216), 57 states have internal predecessors, (216), 0 states have call successors, (0), 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 142 [2022-11-18 20:12:33,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:12:33,541 INFO L225 Difference]: With dead ends: 1310 [2022-11-18 20:12:33,541 INFO L226 Difference]: Without dead ends: 629 [2022-11-18 20:12:33,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 259 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=628, Invalid=7028, Unknown=0, NotChecked=0, Total=7656 [2022-11-18 20:12:33,542 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 668 mSDsluCounter, 2581 mSDsCounter, 0 mSdLazyCounter, 3074 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 668 SdHoareTripleChecker+Valid, 2661 SdHoareTripleChecker+Invalid, 3218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:12:33,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [668 Valid, 2661 Invalid, 3218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3074 Invalid, 0 Unknown, 129 Unchecked, 1.9s Time] [2022-11-18 20:12:33,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-18 20:12:33,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 617. [2022-11-18 20:12:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 1.103896103896104) internal successors, (680), 616 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 680 transitions. [2022-11-18 20:12:33,551 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 680 transitions. Word has length 142 [2022-11-18 20:12:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:12:33,552 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 680 transitions. [2022-11-18 20:12:33,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.789473684210526) internal successors, (216), 57 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:33,552 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 680 transitions. [2022-11-18 20:12:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-18 20:12:33,554 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:12:33,554 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 14, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:12:33,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-18 20:12:33,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:33,771 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:12:33,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:12:33,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1797848050, now seen corresponding path program 19 times [2022-11-18 20:12:33,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:12:33,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379087831] [2022-11-18 20:12:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:12:33,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:12:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:12:35,482 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 190 proven. 630 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:12:35,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:12:35,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379087831] [2022-11-18 20:12:35,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379087831] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:12:35,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633493400] [2022-11-18 20:12:35,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:12:35,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:35,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:12:35,484 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:12:35,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-18 20:12:35,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:12:35,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-18 20:12:35,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:12:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 231 proven. 585 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:12:36,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:12:38,223 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 [2022-11-18 20:12:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 231 proven. 585 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:12:38,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633493400] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:12:38,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:12:38,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 31] total 68 [2022-11-18 20:12:38,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076439072] [2022-11-18 20:12:38,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:12:38,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-18 20:12:38,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:12:38,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-18 20:12:38,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=4219, Unknown=0, NotChecked=0, Total=4692 [2022-11-18 20:12:38,734 INFO L87 Difference]: Start difference. First operand 617 states and 680 transitions. Second operand has 69 states, 68 states have (on average 4.147058823529412) internal successors, (282), 69 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:43,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:12:43,422 INFO L93 Difference]: Finished difference Result 1008 states and 1114 transitions. [2022-11-18 20:12:43,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-18 20:12:43,423 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 4.147058823529412) internal successors, (282), 69 states have internal predecessors, (282), 0 states have call successors, (0), 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 146 [2022-11-18 20:12:43,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:12:43,427 INFO L225 Difference]: With dead ends: 1008 [2022-11-18 20:12:43,427 INFO L226 Difference]: Without dead ends: 1008 [2022-11-18 20:12:43,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 244 SyntacticMatches, 13 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1968, Invalid=8132, Unknown=0, NotChecked=0, Total=10100 [2022-11-18 20:12:43,428 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 941 mSDsluCounter, 1996 mSDsCounter, 0 mSdLazyCounter, 2609 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 941 SdHoareTripleChecker+Valid, 2083 SdHoareTripleChecker+Invalid, 2641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:12:43,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [941 Valid, 2083 Invalid, 2641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2609 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-11-18 20:12:43,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2022-11-18 20:12:43,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 637. [2022-11-18 20:12:43,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 1.1053459119496856) internal successors, (703), 636 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 703 transitions. [2022-11-18 20:12:43,443 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 703 transitions. Word has length 146 [2022-11-18 20:12:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:12:43,444 INFO L495 AbstractCegarLoop]: Abstraction has 637 states and 703 transitions. [2022-11-18 20:12:43,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 4.147058823529412) internal successors, (282), 69 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:12:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 703 transitions. [2022-11-18 20:12:43,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-11-18 20:12:43,446 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:12:43,446 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 15, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:12:43,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-18 20:12:43,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-11-18 20:12:43,654 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:12:43,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:12:43,654 INFO L85 PathProgramCache]: Analyzing trace with hash -982389533, now seen corresponding path program 20 times [2022-11-18 20:12:43,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:12:43,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619605846] [2022-11-18 20:12:43,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:12:43,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:12:43,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:12:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 47 proven. 846 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:12:45,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:12:45,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619605846] [2022-11-18 20:12:45,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619605846] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:12:45,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886895824] [2022-11-18 20:12:45,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:12:45,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:12:45,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:12:45,949 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:12:45,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-18 20:12:46,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:12:46,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:12:46,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 143 conjunts are in the unsatisfiable core [2022-11-18 20:12:46,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:12:46,844 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 [2022-11-18 20:12:50,201 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:12:50,201 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 17 [2022-11-18 20:12:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 231 proven. 662 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:12:50,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:12:54,557 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 [2022-11-18 20:12:54,567 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 [2022-11-18 20:12:54,573 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 [2022-11-18 20:12:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 231 proven. 662 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:12:55,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886895824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:12:55,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:12:55,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 92 [2022-11-18 20:12:55,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862397086] [2022-11-18 20:12:55,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:12:55,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-11-18 20:12:55,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:12:55,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-11-18 20:12:55,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=7859, Unknown=0, NotChecked=0, Total=8372 [2022-11-18 20:12:55,291 INFO L87 Difference]: Start difference. First operand 637 states and 703 transitions. Second operand has 92 states, 92 states have (on average 3.858695652173913) internal successors, (355), 92 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:24,164 INFO L93 Difference]: Finished difference Result 1707 states and 1904 transitions. [2022-11-18 20:13:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-11-18 20:13:24,164 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.858695652173913) internal successors, (355), 92 states have internal predecessors, (355), 0 states have call successors, (0), 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 151 [2022-11-18 20:13:24,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:24,166 INFO L225 Difference]: With dead ends: 1707 [2022-11-18 20:13:24,167 INFO L226 Difference]: Without dead ends: 1019 [2022-11-18 20:13:24,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 261 SyntacticMatches, 13 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7005 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=1627, Invalid=22865, Unknown=0, NotChecked=0, Total=24492 [2022-11-18 20:13:24,168 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 679 mSDsluCounter, 3125 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 3213 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 704 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:24,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 3213 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1488 Invalid, 0 Unknown, 704 Unchecked, 1.2s Time] [2022-11-18 20:13:24,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1019 states. [2022-11-18 20:13:24,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1019 to 673. [2022-11-18 20:13:24,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 1.1041666666666667) internal successors, (742), 672 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:24,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 742 transitions. [2022-11-18 20:13:24,180 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 742 transitions. Word has length 151 [2022-11-18 20:13:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:13:24,180 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 742 transitions. [2022-11-18 20:13:24,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.858695652173913) internal successors, (355), 92 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 742 transitions. [2022-11-18 20:13:24,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-18 20:13:24,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:24,183 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 16, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:13:24,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:24,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:24,392 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:13:24,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:24,392 INFO L85 PathProgramCache]: Analyzing trace with hash -618286197, now seen corresponding path program 21 times [2022-11-18 20:13:24,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:24,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071071690] [2022-11-18 20:13:24,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:24,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 50 proven. 974 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:13:26,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:26,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071071690] [2022-11-18 20:13:26,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071071690] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:26,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707877324] [2022-11-18 20:13:26,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:13:26,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:26,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:26,846 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:26,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-18 20:13:27,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-18 20:13:27,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:13:27,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 162 conjunts are in the unsatisfiable core [2022-11-18 20:13:27,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:28,634 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 [2022-11-18 20:13:29,488 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 [2022-11-18 20:13:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 50 proven. 974 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:13:29,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:13:29,965 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 [2022-11-18 20:13:29,969 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 [2022-11-18 20:13:30,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 50 proven. 974 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:13:30,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707877324] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:13:30,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:13:30,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 37, 37] total 64 [2022-11-18 20:13:30,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916283143] [2022-11-18 20:13:30,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:13:30,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-18 20:13:30,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:13:30,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-18 20:13:30,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2022-11-18 20:13:30,352 INFO L87 Difference]: Start difference. First operand 673 states and 742 transitions. Second operand has 64 states, 64 states have (on average 3.8125) internal successors, (244), 64 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) [2022-11-18 20:13:35,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:13:35,724 INFO L93 Difference]: Finished difference Result 1486 states and 1646 transitions. [2022-11-18 20:13:35,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-18 20:13:35,724 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.8125) internal successors, (244), 64 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 160 [2022-11-18 20:13:35,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:13:35,727 INFO L225 Difference]: With dead ends: 1486 [2022-11-18 20:13:35,727 INFO L226 Difference]: Without dead ends: 701 [2022-11-18 20:13:35,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 292 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1906 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=704, Invalid=8998, Unknown=0, NotChecked=0, Total=9702 [2022-11-18 20:13:35,728 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 592 mSDsluCounter, 3550 mSDsCounter, 0 mSdLazyCounter, 4298 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 3642 SdHoareTripleChecker+Invalid, 4391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:13:35,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 3642 Invalid, 4391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4298 Invalid, 0 Unknown, 77 Unchecked, 2.7s Time] [2022-11-18 20:13:35,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-11-18 20:13:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 689. [2022-11-18 20:13:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 688 states have (on average 1.1017441860465116) internal successors, (758), 688 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:13:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 758 transitions. [2022-11-18 20:13:35,738 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 758 transitions. Word has length 160 [2022-11-18 20:13:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:13:35,739 INFO L495 AbstractCegarLoop]: Abstraction has 689 states and 758 transitions. [2022-11-18 20:13:35,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.8125) internal successors, (244), 64 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) [2022-11-18 20:13:35,739 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 758 transitions. [2022-11-18 20:13:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-11-18 20:13:35,741 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:13:35,741 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 16, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:13:35,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-18 20:13:35,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:35,952 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:13:35,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:13:35,952 INFO L85 PathProgramCache]: Analyzing trace with hash 578858856, now seen corresponding path program 22 times [2022-11-18 20:13:35,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:13:35,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644815316] [2022-11-18 20:13:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:13:35,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:13:35,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:13:37,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 276 proven. 801 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-18 20:13:37,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:13:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644815316] [2022-11-18 20:13:37,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644815316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:13:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461390335] [2022-11-18 20:13:37,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:13:37,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:13:37,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:13:37,928 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:13:37,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-18 20:13:38,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:13:38,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:13:38,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 230 conjunts are in the unsatisfiable core [2022-11-18 20:13:38,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:13:38,400 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 [2022-11-18 20:14:02,249 INFO L321 Elim1Store]: treesize reduction 52, result has 89.3 percent of original size [2022-11-18 20:14:02,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 15 select indices, 15 select index equivalence classes, 58 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 47 case distinctions, treesize of input 148 treesize of output 493 [2022-11-18 20:14:02,994 WARN L718 sPolynomialRelations]: Constructing 16384(two to the power of 14 dual juncts. [2022-11-18 20:14:04,855 WARN L718 sPolynomialRelations]: Constructing 8192(two to the power of 13 dual juncts. [2022-11-18 20:14:06,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 258 proven. 459 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-11-18 20:14:06,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:14:33,938 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 209 treesize of output 181 [2022-11-18 20:14:34,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:14:34,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 58 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 33 case distinctions, treesize of input 321 treesize of output 597 [2022-11-18 20:14:34,474 WARN L718 sPolynomialRelations]: Constructing 16384(two to the power of 14 dual juncts. [2022-11-18 20:14:36,234 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 99 treesize of output 81 [2022-11-18 20:14:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 3 proven. 714 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-11-18 20:14:36,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461390335] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:14:37,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:14:37,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 68, 68] total 167 [2022-11-18 20:14:37,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070584098] [2022-11-18 20:14:37,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:14:37,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-11-18 20:14:37,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:14:37,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-11-18 20:14:37,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2241, Invalid=25815, Unknown=0, NotChecked=0, Total=28056 [2022-11-18 20:14:37,005 INFO L87 Difference]: Start difference. First operand 689 states and 758 transitions. Second operand has 168 states, 167 states have (on average 2.1197604790419162) internal successors, (354), 168 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) [2022-11-18 20:15:26,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:15:26,123 INFO L93 Difference]: Finished difference Result 1615 states and 1786 transitions. [2022-11-18 20:15:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-11-18 20:15:26,124 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 167 states have (on average 2.1197604790419162) internal successors, (354), 168 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) Word has length 164 [2022-11-18 20:15:26,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:15:26,126 INFO L225 Difference]: With dead ends: 1615 [2022-11-18 20:15:26,127 INFO L226 Difference]: Without dead ends: 1536 [2022-11-18 20:15:26,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 299 SyntacticMatches, 1 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25617 ImplicationChecksByTransitivity, 87.0s TimeCoverageRelationStatistics Valid=9151, Invalid=76405, Unknown=0, NotChecked=0, Total=85556 [2022-11-18 20:15:26,131 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 2073 mSDsluCounter, 5347 mSDsCounter, 0 mSdLazyCounter, 4078 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2073 SdHoareTripleChecker+Valid, 5475 SdHoareTripleChecker+Invalid, 9361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 4078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5066 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-18 20:15:26,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2073 Valid, 5475 Invalid, 9361 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [217 Valid, 4078 Invalid, 0 Unknown, 5066 Unchecked, 4.9s Time] [2022-11-18 20:15:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1536 states. [2022-11-18 20:15:26,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1536 to 804. [2022-11-18 20:15:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 1.108343711083437) internal successors, (890), 803 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:15:26,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 890 transitions. [2022-11-18 20:15:26,146 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 890 transitions. Word has length 164 [2022-11-18 20:15:26,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:15:26,147 INFO L495 AbstractCegarLoop]: Abstraction has 804 states and 890 transitions. [2022-11-18 20:15:26,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 167 states have (on average 2.1197604790419162) internal successors, (354), 168 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) [2022-11-18 20:15:26,147 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 890 transitions. [2022-11-18 20:15:26,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-18 20:15:26,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:15:26,149 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 18, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:15:26,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-18 20:15:26,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-18 20:15:26,358 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:15:26,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:15:26,358 INFO L85 PathProgramCache]: Analyzing trace with hash 318471102, now seen corresponding path program 23 times [2022-11-18 20:15:26,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:15:26,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003338632] [2022-11-18 20:15:26,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:15:26,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:15:26,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:15:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 56 proven. 1185 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:15:28,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:15:28,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003338632] [2022-11-18 20:15:28,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003338632] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:15:28,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226244264] [2022-11-18 20:15:28,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:15:28,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:15:28,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:15:28,887 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:15:28,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-18 20:15:29,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-11-18 20:15:29,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:15:29,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 170 conjunts are in the unsatisfiable core [2022-11-18 20:15:29,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:15:30,313 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 [2022-11-18 20:15:31,062 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 [2022-11-18 20:15:31,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 56 proven. 1185 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:15:31,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:15:31,483 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 [2022-11-18 20:15:31,488 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 [2022-11-18 20:15:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 56 proven. 1185 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:15:31,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226244264] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:15:31,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:15:31,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 39] total 66 [2022-11-18 20:15:31,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822877847] [2022-11-18 20:15:31,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:15:31,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-18 20:15:31,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:15:31,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-18 20:15:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 20:15:31,865 INFO L87 Difference]: Start difference. First operand 804 states and 890 transitions. Second operand has 66 states, 66 states have (on average 3.8636363636363638) internal successors, (255), 66 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:15:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:15:37,343 INFO L93 Difference]: Finished difference Result 1747 states and 1941 transitions. [2022-11-18 20:15:37,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-18 20:15:37,343 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.8636363636363638) internal successors, (255), 66 states have internal predecessors, (255), 0 states have call successors, (0), 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 174 [2022-11-18 20:15:37,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:15:37,349 INFO L225 Difference]: With dead ends: 1747 [2022-11-18 20:15:37,349 INFO L226 Difference]: Without dead ends: 832 [2022-11-18 20:15:37,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 320 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=733, Invalid=9773, Unknown=0, NotChecked=0, Total=10506 [2022-11-18 20:15:37,350 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 525 mSDsluCounter, 3848 mSDsCounter, 0 mSdLazyCounter, 4751 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 3946 SdHoareTripleChecker+Invalid, 4822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 4751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:15:37,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [525 Valid, 3946 Invalid, 4822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 4751 Invalid, 0 Unknown, 55 Unchecked, 2.8s Time] [2022-11-18 20:15:37,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-11-18 20:15:37,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 820. [2022-11-18 20:15:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 1.1062271062271063) internal successors, (906), 819 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:15:37,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 906 transitions. [2022-11-18 20:15:37,360 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 906 transitions. Word has length 174 [2022-11-18 20:15:37,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:15:37,360 INFO L495 AbstractCegarLoop]: Abstraction has 820 states and 906 transitions. [2022-11-18 20:15:37,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.8636363636363638) internal successors, (255), 66 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:15:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 906 transitions. [2022-11-18 20:15:37,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-11-18 20:15:37,363 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:15:37,363 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 18, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:15:37,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-18 20:15:37,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-18 20:15:37,572 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:15:37,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:15:37,572 INFO L85 PathProgramCache]: Analyzing trace with hash 678293723, now seen corresponding path program 24 times [2022-11-18 20:15:37,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:15:37,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459524240] [2022-11-18 20:15:37,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:15:37,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:15:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:15:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 325 proven. 973 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:15:40,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:15:40,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459524240] [2022-11-18 20:15:40,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459524240] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:15:40,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332720891] [2022-11-18 20:15:40,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:15:40,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:15:40,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:15:40,175 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:15:40,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-18 20:15:41,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-11-18 20:15:41,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:15:41,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 706 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-18 20:15:41,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:15:41,192 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-18 20:15:41,193 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 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-18 20:15:43,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 378 proven. 920 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:15:43,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:15:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1332 backedges. 378 proven. 920 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:15:47,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332720891] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:15:47,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:15:47,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 110 [2022-11-18 20:15:47,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230728896] [2022-11-18 20:15:47,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:15:47,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-11-18 20:15:47,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:15:47,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-11-18 20:15:47,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1561, Invalid=10649, Unknown=0, NotChecked=0, Total=12210 [2022-11-18 20:15:47,409 INFO L87 Difference]: Start difference. First operand 820 states and 906 transitions. Second operand has 111 states, 110 states have (on average 4.290909090909091) internal successors, (472), 111 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:15:52,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:15:52,568 INFO L93 Difference]: Finished difference Result 1290 states and 1427 transitions. [2022-11-18 20:15:52,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 20:15:52,569 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 4.290909090909091) internal successors, (472), 111 states have internal predecessors, (472), 0 states have call successors, (0), 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 178 [2022-11-18 20:15:52,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:15:52,574 INFO L225 Difference]: With dead ends: 1290 [2022-11-18 20:15:52,574 INFO L226 Difference]: Without dead ends: 1290 [2022-11-18 20:15:52,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5771 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=4323, Invalid=17139, Unknown=0, NotChecked=0, Total=21462 [2022-11-18 20:15:52,575 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 1310 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 1912 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1310 SdHoareTripleChecker+Valid, 1658 SdHoareTripleChecker+Invalid, 1967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-18 20:15:52,576 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1310 Valid, 1658 Invalid, 1967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1912 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-18 20:15:52,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-11-18 20:15:52,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 840. [2022-11-18 20:15:52,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 1.1072705601907031) internal successors, (929), 839 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:15:52,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 929 transitions. [2022-11-18 20:15:52,596 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 929 transitions. Word has length 178 [2022-11-18 20:15:52,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:15:52,596 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 929 transitions. [2022-11-18 20:15:52,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 4.290909090909091) internal successors, (472), 111 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:15:52,597 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 929 transitions. [2022-11-18 20:15:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-11-18 20:15:52,599 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:15:52,599 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 19, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:15:52,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-11-18 20:15:52,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-18 20:15:52,800 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:15:52,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:15:52,801 INFO L85 PathProgramCache]: Analyzing trace with hash 354416694, now seen corresponding path program 25 times [2022-11-18 20:15:52,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:15:52,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475589044] [2022-11-18 20:15:52,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:15:52,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:15:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:15:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 59 proven. 1336 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:15:55,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:15:55,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475589044] [2022-11-18 20:15:55,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475589044] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:15:55,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545752768] [2022-11-18 20:15:55,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:15:55,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:15:55,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:15:55,298 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:15:55,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-18 20:15:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:15:55,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 180 conjunts are in the unsatisfiable core [2022-11-18 20:15:55,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:15:56,719 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 [2022-11-18 20:15:57,553 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 [2022-11-18 20:15:57,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 59 proven. 1336 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:15:57,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:15:58,010 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 [2022-11-18 20:15:58,012 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 [2022-11-18 20:15:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 59 proven. 1336 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:15:58,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545752768] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:15:58,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:15:58,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 41, 41] total 69 [2022-11-18 20:15:58,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991499881] [2022-11-18 20:15:58,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:15:58,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-11-18 20:15:58,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:15:58,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-11-18 20:15:58,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=4493, Unknown=0, NotChecked=0, Total=4692 [2022-11-18 20:15:58,423 INFO L87 Difference]: Start difference. First operand 840 states and 929 transitions. Second operand has 69 states, 69 states have (on average 3.8840579710144927) internal successors, (268), 69 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:04,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:16:04,966 INFO L93 Difference]: Finished difference Result 1835 states and 2039 transitions. [2022-11-18 20:16:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-18 20:16:04,966 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.8840579710144927) internal successors, (268), 69 states have internal predecessors, (268), 0 states have call successors, (0), 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 183 [2022-11-18 20:16:04,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:16:04,968 INFO L225 Difference]: With dead ends: 1835 [2022-11-18 20:16:04,968 INFO L226 Difference]: Without dead ends: 868 [2022-11-18 20:16:04,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 337 SyntacticMatches, 3 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=768, Invalid=10788, Unknown=0, NotChecked=0, Total=11556 [2022-11-18 20:16:04,969 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 682 mSDsluCounter, 4343 mSDsCounter, 0 mSdLazyCounter, 5275 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 4447 SdHoareTripleChecker+Invalid, 5406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 5275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:16:04,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 4447 Invalid, 5406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 5275 Invalid, 0 Unknown, 112 Unchecked, 3.4s Time] [2022-11-18 20:16:04,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-11-18 20:16:04,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 856. [2022-11-18 20:16:04,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.105263157894737) internal successors, (945), 855 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:04,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 945 transitions. [2022-11-18 20:16:04,983 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 945 transitions. Word has length 183 [2022-11-18 20:16:04,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:16:04,983 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 945 transitions. [2022-11-18 20:16:04,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.8840579710144927) internal successors, (268), 69 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:04,984 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 945 transitions. [2022-11-18 20:16:04,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-11-18 20:16:04,986 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:16:04,986 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 19, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:16:04,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-18 20:16:05,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-18 20:16:05,195 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:16:05,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:16:05,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1022555065, now seen corresponding path program 26 times [2022-11-18 20:16:05,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:16:05,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628151716] [2022-11-18 20:16:05,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:16:05,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:16:05,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:16:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1490 backedges. 378 proven. 1084 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-18 20:16:07,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:16:07,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628151716] [2022-11-18 20:16:07,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628151716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:16:07,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70116061] [2022-11-18 20:16:07,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:16:07,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:16:07,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:16:07,535 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:16:07,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-18 20:16:07,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:16:07,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:16:07,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 738 conjuncts, 162 conjunts are in the unsatisfiable core [2022-11-18 20:16:07,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:16:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1490 backedges. 435 proven. 1021 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:16:09,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:16:11,021 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 [2022-11-18 20:16:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1490 backedges. 435 proven. 1021 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:16:11,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70116061] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:16:11,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:16:11,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 39, 39] total 84 [2022-11-18 20:16:11,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175687145] [2022-11-18 20:16:11,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:16:11,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-11-18 20:16:11,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:16:11,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-11-18 20:16:11,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=737, Invalid=6403, Unknown=0, NotChecked=0, Total=7140 [2022-11-18 20:16:11,762 INFO L87 Difference]: Start difference. First operand 856 states and 945 transitions. Second operand has 85 states, 84 states have (on average 4.214285714285714) internal successors, (354), 85 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) [2022-11-18 20:16:17,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:16:17,846 INFO L93 Difference]: Finished difference Result 1358 states and 1502 transitions. [2022-11-18 20:16:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-18 20:16:17,847 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 4.214285714285714) internal successors, (354), 85 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) Word has length 187 [2022-11-18 20:16:17,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:16:17,852 INFO L225 Difference]: With dead ends: 1358 [2022-11-18 20:16:17,852 INFO L226 Difference]: Without dead ends: 1358 [2022-11-18 20:16:17,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 314 SyntacticMatches, 17 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4513 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=3012, Invalid=12488, Unknown=0, NotChecked=0, Total=15500 [2022-11-18 20:16:17,853 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 1154 mSDsluCounter, 2793 mSDsCounter, 0 mSdLazyCounter, 3662 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1154 SdHoareTripleChecker+Valid, 2904 SdHoareTripleChecker+Invalid, 3703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:16:17,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1154 Valid, 2904 Invalid, 3703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 3662 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-18 20:16:17,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-11-18 20:16:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 876. [2022-11-18 20:16:17,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 1.1062857142857143) internal successors, (968), 875 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:17,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 968 transitions. [2022-11-18 20:16:17,873 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 968 transitions. Word has length 187 [2022-11-18 20:16:17,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:16:17,874 INFO L495 AbstractCegarLoop]: Abstraction has 876 states and 968 transitions. [2022-11-18 20:16:17,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 4.214285714285714) internal successors, (354), 85 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) [2022-11-18 20:16:17,874 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 968 transitions. [2022-11-18 20:16:17,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-11-18 20:16:17,877 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:16:17,877 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 20, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:16:17,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-18 20:16:18,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-18 20:16:18,083 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:16:18,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:16:18,084 INFO L85 PathProgramCache]: Analyzing trace with hash -264237032, now seen corresponding path program 27 times [2022-11-18 20:16:18,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:16:18,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309526778] [2022-11-18 20:16:18,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:16:18,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:16:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:16:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1592 backedges. 62 proven. 1496 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:16:21,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:16:21,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309526778] [2022-11-18 20:16:21,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309526778] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:16:21,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077836687] [2022-11-18 20:16:21,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:16:21,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:16:21,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:16:21,349 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:16:21,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-18 20:16:23,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-11-18 20:16:23,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:16:23,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 756 conjuncts, 190 conjunts are in the unsatisfiable core [2022-11-18 20:16:23,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:16:24,394 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 [2022-11-18 20:16:25,334 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 [2022-11-18 20:16:25,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1592 backedges. 62 proven. 1496 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:16:25,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:16:25,817 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 [2022-11-18 20:16:25,819 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 [2022-11-18 20:16:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1592 backedges. 62 proven. 1496 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:16:26,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077836687] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:16:26,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:16:26,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 43, 43] total 72 [2022-11-18 20:16:26,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611789607] [2022-11-18 20:16:26,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:16:26,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-11-18 20:16:26,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:16:26,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-11-18 20:16:26,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=4905, Unknown=0, NotChecked=0, Total=5112 [2022-11-18 20:16:26,263 INFO L87 Difference]: Start difference. First operand 876 states and 968 transitions. Second operand has 72 states, 72 states have (on average 3.9027777777777777) internal successors, (281), 72 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:34,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:16:34,033 INFO L93 Difference]: Finished difference Result 1923 states and 2137 transitions. [2022-11-18 20:16:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-18 20:16:34,034 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.9027777777777777) internal successors, (281), 72 states have internal predecessors, (281), 0 states have call successors, (0), 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 192 [2022-11-18 20:16:34,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:16:34,036 INFO L225 Difference]: With dead ends: 1923 [2022-11-18 20:16:34,036 INFO L226 Difference]: Without dead ends: 904 [2022-11-18 20:16:34,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 354 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=803, Invalid=11853, Unknown=0, NotChecked=0, Total=12656 [2022-11-18 20:16:34,037 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 822 mSDsluCounter, 5326 mSDsCounter, 0 mSdLazyCounter, 6306 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 5436 SdHoareTripleChecker+Invalid, 6531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 6306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:16:34,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [822 Valid, 5436 Invalid, 6531 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [19 Valid, 6306 Invalid, 0 Unknown, 206 Unchecked, 4.2s Time] [2022-11-18 20:16:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-11-18 20:16:34,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 892. [2022-11-18 20:16:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 1.1043771043771045) internal successors, (984), 891 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:34,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 984 transitions. [2022-11-18 20:16:34,049 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 984 transitions. Word has length 192 [2022-11-18 20:16:34,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:16:34,050 INFO L495 AbstractCegarLoop]: Abstraction has 892 states and 984 transitions. [2022-11-18 20:16:34,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.9027777777777777) internal successors, (281), 72 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:16:34,050 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 984 transitions. [2022-11-18 20:16:34,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-11-18 20:16:34,052 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:16:34,052 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 20, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:16:34,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-18 20:16:34,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:16:34,253 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 10 more)] === [2022-11-18 20:16:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:16:34,253 INFO L85 PathProgramCache]: Analyzing trace with hash 2016172021, now seen corresponding path program 28 times [2022-11-18 20:16:34,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:16:34,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816161929] [2022-11-18 20:16:34,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:16:34,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:16:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:16:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 435 proven. 1188 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-11-18 20:16:37,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:16:37,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816161929] [2022-11-18 20:16:37,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816161929] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:16:37,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67860836] [2022-11-18 20:16:37,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:16:37,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:16:37,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:16:37,692 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:16:37,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0a4b4707-7c2f-46a3-900b-5efa8f6b4dfe/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-18 20:16:38,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:16:38,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:16:38,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 277 conjunts are in the unsatisfiable core [2022-11-18 20:16:38,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:16:38,318 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 [2022-11-18 20:17:18,614 INFO L321 Elim1Store]: treesize reduction 64, result has 91.0 percent of original size [2022-11-18 20:17:18,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 84 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 69 case distinctions, treesize of input 178 treesize of output 717 [2022-11-18 20:17:20,976 WARN L718 sPolynomialRelations]: Constructing 131072(two to the power of 17 dual juncts. [2022-11-18 20:17:38,779 WARN L718 sPolynomialRelations]: Constructing 65536(two to the power of 16 dual juncts. [2022-11-18 20:17:46,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 369 proven. 726 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2022-11-18 20:17:46,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:18:29,707 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 254 treesize of output 220 [2022-11-18 20:18:30,383 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:18:30,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 84 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 52 case distinctions, treesize of input 390 treesize of output 844 [2022-11-18 20:18:30,545 WARN L718 sPolynomialRelations]: Constructing 131072(two to the power of 17 dual juncts. [2022-11-18 20:18:46,000 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 99 treesize of output 81 [2022-11-18 20:18:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 3 proven. 1092 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2022-11-18 20:18:47,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67860836] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:18:47,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:18:47,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 81, 81] total 199 [2022-11-18 20:18:47,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085577445] [2022-11-18 20:18:47,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:18:47,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-11-18 20:18:47,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:18:47,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-11-18 20:18:47,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3101, Invalid=36699, Unknown=0, NotChecked=0, Total=39800 [2022-11-18 20:18:47,412 INFO L87 Difference]: Start difference. First operand 892 states and 984 transitions. Second operand has 200 states, 199 states have (on average 2.1155778894472363) internal successors, (421), 200 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)