./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8 --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 6bfeee33a1b1d098a34bec7a761d4de16bc595043f21d77f5851cba758b79f34 --- 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-2329fc7 [2022-12-13 18:25:24,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:25:24,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:25:24,313 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:25:24,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:25:24,314 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:25:24,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:25:24,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:25:24,318 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:25:24,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:25:24,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:25:24,321 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:25:24,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:25:24,322 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:25:24,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:25:24,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:25:24,325 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:25:24,326 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:25:24,327 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:25:24,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:25:24,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:25:24,331 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:25:24,332 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:25:24,333 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:25:24,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:25:24,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:25:24,337 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:25:24,337 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:25:24,338 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:25:24,339 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:25:24,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:25:24,340 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:25:24,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:25:24,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:25:24,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:25:24,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:25:24,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:25:24,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:25:24,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:25:24,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:25:24,344 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:25:24,345 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 18:25:24,364 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:25:24,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:25:24,364 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:25:24,364 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:25:24,365 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:25:24,365 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:25:24,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:25:24,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:25:24,366 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:25:24,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:25:24,366 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:25:24,367 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 18:25:24,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:25:24,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:25:24,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:25:24,367 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 18:25:24,367 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 18:25:24,367 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 18:25:24,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:25:24,368 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 18:25:24,368 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:25:24,368 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:25:24,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:25:24,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:25:24,369 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:25:24,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:25:24,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:25:24,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:25:24,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:25:24,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:25:24,370 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:25:24,370 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:25:24,370 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:25:24,370 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:25:24,370 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6bfeee33a1b1d098a34bec7a761d4de16bc595043f21d77f5851cba758b79f34 [2022-12-13 18:25:24,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:25:24,573 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:25:24,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:25:24,577 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:25:24,577 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:25:24,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/list-simple/dll2c_update_all.i [2022-12-13 18:25:27,160 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:25:27,361 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:25:27,361 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/sv-benchmarks/c/list-simple/dll2c_update_all.i [2022-12-13 18:25:27,369 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/data/13bff917f/b0f46517d9784a2b9fa360281a6f5689/FLAGca29f4b9b [2022-12-13 18:25:27,380 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/data/13bff917f/b0f46517d9784a2b9fa360281a6f5689 [2022-12-13 18:25:27,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:25:27,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:25:27,383 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:25:27,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:25:27,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:25:27,386 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:25:27" (1/1) ... [2022-12-13 18:25:27,387 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@993f778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:25:27, skipping insertion in model container [2022-12-13 18:25:27,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:25:27" (1/1) ... [2022-12-13 18:25:27,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:25:27,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:25:27,599 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/sv-benchmarks/c/list-simple/dll2c_update_all.i[24538,24551] [2022-12-13 18:25:27,601 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:25:27,608 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:25:27,635 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/sv-benchmarks/c/list-simple/dll2c_update_all.i[24538,24551] [2022-12-13 18:25:27,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:25:27,652 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:25:27,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:25:27 WrapperNode [2022-12-13 18:25:27,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:25:27,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:25:27,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:25:27,654 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:25:27,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:25:27" (1/1) ... [2022-12-13 18:25:27,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:25:27" (1/1) ... [2022-12-13 18:25:27,683 INFO L138 Inliner]: procedures = 126, calls = 29, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 137 [2022-12-13 18:25:27,683 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:25:27,684 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:25:27,684 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:25:27,684 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:25:27,691 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:25:27" (1/1) ... [2022-12-13 18:25:27,691 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:25:27" (1/1) ... [2022-12-13 18:25:27,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:25:27" (1/1) ... [2022-12-13 18:25:27,693 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:25:27" (1/1) ... [2022-12-13 18:25:27,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:25:27" (1/1) ... [2022-12-13 18:25:27,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:25:27" (1/1) ... [2022-12-13 18:25:27,702 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:25:27" (1/1) ... [2022-12-13 18:25:27,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:25:27" (1/1) ... [2022-12-13 18:25:27,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:25:27,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:25:27,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:25:27,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:25:27,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:25:27" (1/1) ... [2022-12-13 18:25:27,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:25:27,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:25:27,727 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:25:27,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:25:27,759 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 18:25:27,759 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 18:25:27,759 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-12-13 18:25:27,759 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-12-13 18:25:27,759 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 18:25:27,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:25:27,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-13 18:25:27,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-12-13 18:25:27,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:25:27,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 18:25:27,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:25:27,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:25:27,855 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:25:27,857 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:25:28,112 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:25:28,117 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:25:28,117 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-12-13 18:25:28,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:25:28 BoogieIcfgContainer [2022-12-13 18:25:28,119 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:25:28,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:25:28,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:25:28,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:25:28,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:25:27" (1/3) ... [2022-12-13 18:25:28,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@371018d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:25:28, skipping insertion in model container [2022-12-13 18:25:28,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:25:27" (2/3) ... [2022-12-13 18:25:28,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@371018d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:25:28, skipping insertion in model container [2022-12-13 18:25:28,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:25:28" (3/3) ... [2022-12-13 18:25:28,125 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_update_all.i [2022-12-13 18:25:28,139 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:25:28,140 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-12-13 18:25:28,173 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:25:28,179 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=PETRI_NET, 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;@74ecced7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:25:28,179 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-12-13 18:25:28,182 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 89 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:28,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 18:25:28,187 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:28,188 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:25:28,188 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:28,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:28,192 INFO L85 PathProgramCache]: Analyzing trace with hash 894964530, now seen corresponding path program 1 times [2022-12-13 18:25:28,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:28,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858611192] [2022-12-13 18:25:28,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:28,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:28,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:25:28,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:28,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858611192] [2022-12-13 18:25:28,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858611192] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:28,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:28,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:25:28,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183157814] [2022-12-13 18:25:28,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:28,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:25:28,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:28,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:25:28,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:25:28,404 INFO L87 Difference]: Start difference. First operand has 93 states, 55 states have (on average 1.9090909090909092) internal successors, (105), 89 states have internal predecessors, (105), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:28,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:28,490 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2022-12-13 18:25:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:25:28,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 18:25:28,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:28,497 INFO L225 Difference]: With dead ends: 90 [2022-12-13 18:25:28,497 INFO L226 Difference]: Without dead ends: 87 [2022-12-13 18:25:28,498 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 [2022-12-13 18:25:28,501 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:28,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 147 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:25:28,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-12-13 18:25:28,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-12-13 18:25:28,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 53 states have (on average 1.7169811320754718) internal successors, (91), 83 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2022-12-13 18:25:28,528 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 95 transitions. Word has length 6 [2022-12-13 18:25:28,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:28,528 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 95 transitions. [2022-12-13 18:25:28,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:28,528 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 95 transitions. [2022-12-13 18:25:28,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-13 18:25:28,529 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:28,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 18:25:28,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:25:28,529 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:28,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:28,530 INFO L85 PathProgramCache]: Analyzing trace with hash 894964531, now seen corresponding path program 1 times [2022-12-13 18:25:28,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:28,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585159483] [2022-12-13 18:25:28,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:28,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:25:28,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:28,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585159483] [2022-12-13 18:25:28,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585159483] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:28,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:28,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:25:28,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870473068] [2022-12-13 18:25:28,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:28,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 18:25:28,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:28,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 18:25:28,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 18:25:28,635 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:28,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:28,687 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2022-12-13 18:25:28,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 18:25:28,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-13 18:25:28,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:28,689 INFO L225 Difference]: With dead ends: 84 [2022-12-13 18:25:28,689 INFO L226 Difference]: Without dead ends: 84 [2022-12-13 18:25:28,689 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 [2022-12-13 18:25:28,690 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 5 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:28,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 149 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:25:28,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-13 18:25:28,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-12-13 18:25:28,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 80 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2022-12-13 18:25:28,695 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 6 [2022-12-13 18:25:28,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:28,695 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2022-12-13 18:25:28,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:25:28,696 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2022-12-13 18:25:28,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-13 18:25:28,696 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:28,696 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:28,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:25:28,697 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:28,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:28,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1046244471, now seen corresponding path program 1 times [2022-12-13 18:25:28,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:28,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198779462] [2022-12-13 18:25:28,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:28,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:28,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:25:28,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:28,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198779462] [2022-12-13 18:25:28,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198779462] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:28,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:28,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:25:28,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868968802] [2022-12-13 18:25:28,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:28,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:25:28,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:28,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:25:28,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:25:28,791 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 18:25:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:28,861 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2022-12-13 18:25:28,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:25:28,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-12-13 18:25:28,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:28,863 INFO L225 Difference]: With dead ends: 95 [2022-12-13 18:25:28,863 INFO L226 Difference]: Without dead ends: 95 [2022-12-13 18:25:28,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:25:28,864 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 10 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:28,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 223 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:25:28,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-12-13 18:25:28,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2022-12-13 18:25:28,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 54 states have (on average 1.6481481481481481) internal successors, (89), 81 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 93 transitions. [2022-12-13 18:25:28,870 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 93 transitions. Word has length 14 [2022-12-13 18:25:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:28,870 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 93 transitions. [2022-12-13 18:25:28,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 18:25:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 93 transitions. [2022-12-13 18:25:28,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 18:25:28,871 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:28,871 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:28,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 18:25:28,871 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:28,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:28,871 INFO L85 PathProgramCache]: Analyzing trace with hash 543084160, now seen corresponding path program 1 times [2022-12-13 18:25:28,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:28,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045829363] [2022-12-13 18:25:28,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:28,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:28,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:28,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:25:29,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:29,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045829363] [2022-12-13 18:25:29,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045829363] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:29,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:29,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 18:25:29,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50541173] [2022-12-13 18:25:29,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:29,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:25:29,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:29,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:25:29,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:25:29,023 INFO L87 Difference]: Start difference. First operand 85 states and 93 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:29,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:29,172 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2022-12-13 18:25:29,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:25:29,172 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-12-13 18:25:29,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:29,175 INFO L225 Difference]: With dead ends: 105 [2022-12-13 18:25:29,175 INFO L226 Difference]: Without dead ends: 105 [2022-12-13 18:25:29,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:25:29,176 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 77 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:29,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 286 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:25:29,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-12-13 18:25:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 84. [2022-12-13 18:25:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 54 states have (on average 1.6296296296296295) internal successors, (88), 80 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2022-12-13 18:25:29,181 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 24 [2022-12-13 18:25:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:29,181 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2022-12-13 18:25:29,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:29,181 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2022-12-13 18:25:29,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 18:25:29,182 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:29,182 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:29,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 18:25:29,182 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:29,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:29,182 INFO L85 PathProgramCache]: Analyzing trace with hash 543084161, now seen corresponding path program 1 times [2022-12-13 18:25:29,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:29,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280972128] [2022-12-13 18:25:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:29,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:29,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:29,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:29,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:29,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:29,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280972128] [2022-12-13 18:25:29,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280972128] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:29,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:29,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-12-13 18:25:29,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592531253] [2022-12-13 18:25:29,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:29,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:25:29,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:29,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:25:29,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:25:29,406 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:29,539 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2022-12-13 18:25:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:25:29,540 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-12-13 18:25:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:29,541 INFO L225 Difference]: With dead ends: 84 [2022-12-13 18:25:29,541 INFO L226 Difference]: Without dead ends: 84 [2022-12-13 18:25:29,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:25:29,542 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 77 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:29,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 295 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:25:29,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-13 18:25:29,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-12-13 18:25:29,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 54 states have (on average 1.6111111111111112) internal successors, (87), 79 states have internal predecessors, (87), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:29,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-12-13 18:25:29,548 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 24 [2022-12-13 18:25:29,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:29,548 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-12-13 18:25:29,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:29,549 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-12-13 18:25:29,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 18:25:29,549 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:29,549 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:29,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 18:25:29,549 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:29,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:29,550 INFO L85 PathProgramCache]: Analyzing trace with hash -2082132639, now seen corresponding path program 1 times [2022-12-13 18:25:29,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:29,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350033000] [2022-12-13 18:25:29,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:29,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:29,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:29,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:29,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:29,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:29,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350033000] [2022-12-13 18:25:29,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350033000] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:29,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251138585] [2022-12-13 18:25:29,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:29,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:29,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:25:29,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:25:29,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:25:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:29,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 18:25:29,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:29,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:25:29,948 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_338 Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| v_ArrVal_338))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-12-13 18:25:30,025 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-13 18:25:30,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-12-13 18:25:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-12-13 18:25:30,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:25:30,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251138585] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:30,089 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:25:30,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-12-13 18:25:30,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359367283] [2022-12-13 18:25:30,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:25:30,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 18:25:30,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:30,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 18:25:30,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2022-12-13 18:25:30,091 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 18:25:30,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:30,320 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2022-12-13 18:25:30,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:25:30,320 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-12-13 18:25:30,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:30,322 INFO L225 Difference]: With dead ends: 110 [2022-12-13 18:25:30,322 INFO L226 Difference]: Without dead ends: 110 [2022-12-13 18:25:30,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2022-12-13 18:25:30,323 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 65 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:30,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 372 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 284 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-12-13 18:25:30,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-12-13 18:25:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 88. [2022-12-13 18:25:30,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.603448275862069) internal successors, (93), 83 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:25:30,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2022-12-13 18:25:30,329 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 26 [2022-12-13 18:25:30,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:30,329 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2022-12-13 18:25:30,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 18:25:30,329 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2022-12-13 18:25:30,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-13 18:25:30,330 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:30,330 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:30,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:25:30,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:30,532 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:30,533 INFO L85 PathProgramCache]: Analyzing trace with hash -2082132638, now seen corresponding path program 1 times [2022-12-13 18:25:30,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:30,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698681797] [2022-12-13 18:25:30,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:30,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:30,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:30,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:30,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:30,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:30,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698681797] [2022-12-13 18:25:30,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698681797] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:30,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176587938] [2022-12-13 18:25:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:30,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:30,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:25:30,957 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:25:30,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:25:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:31,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 18:25:31,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:31,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:25:31,209 WARN L859 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((v_ArrVal_475 Int)) (= (store |c_old(#length)| |node_create_~temp~0#1.base| v_ArrVal_475) |c_#length|)) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2022-12-13 18:25:31,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:25:31,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:25:31,264 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:25:31,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:25:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-12-13 18:25:31,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:25:31,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176587938] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:31,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:25:31,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 19 [2022-12-13 18:25:31,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072581233] [2022-12-13 18:25:31,411 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:25:31,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 18:25:31,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:31,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 18:25:31,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=358, Unknown=1, NotChecked=38, Total=462 [2022-12-13 18:25:31,412 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 18:25:31,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:31,754 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2022-12-13 18:25:31,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:25:31,755 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-12-13 18:25:31,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:31,755 INFO L225 Difference]: With dead ends: 90 [2022-12-13 18:25:31,755 INFO L226 Difference]: Without dead ends: 90 [2022-12-13 18:25:31,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=423, Unknown=1, NotChecked=42, Total=552 [2022-12-13 18:25:31,756 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 16 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:31,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 690 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 465 Invalid, 0 Unknown, 90 Unchecked, 0.3s Time] [2022-12-13 18:25:31,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-12-13 18:25:31,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2022-12-13 18:25:31,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 83 states have internal predecessors, (92), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:25:31,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2022-12-13 18:25:31,760 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 26 [2022-12-13 18:25:31,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:31,760 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2022-12-13 18:25:31,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.210526315789474) internal successors, (42), 16 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 18:25:31,760 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2022-12-13 18:25:31,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-12-13 18:25:31,761 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:31,761 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:31,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 18:25:31,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:31,962 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:31,963 INFO L85 PathProgramCache]: Analyzing trace with hash 525447991, now seen corresponding path program 1 times [2022-12-13 18:25:31,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:31,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146952234] [2022-12-13 18:25:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:31,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:32,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:32,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:32,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:32,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146952234] [2022-12-13 18:25:32,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146952234] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:32,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851072722] [2022-12-13 18:25:32,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:32,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:32,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:25:32,185 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:25:32,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 18:25:32,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:32,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 18:25:32,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:32,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:32,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:25:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:32,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851072722] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:25:32,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:25:32,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-12-13 18:25:32,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160254968] [2022-12-13 18:25:32,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:25:32,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 18:25:32,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:32,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 18:25:32,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 18:25:32,379 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:32,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:32,459 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2022-12-13 18:25:32,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:25:32,459 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-12-13 18:25:32,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:32,460 INFO L225 Difference]: With dead ends: 89 [2022-12-13 18:25:32,460 INFO L226 Difference]: Without dead ends: 89 [2022-12-13 18:25:32,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:25:32,461 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 4 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:32,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 433 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:25:32,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-13 18:25:32,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-12-13 18:25:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.5689655172413792) internal successors, (91), 83 states have internal predecessors, (91), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:25:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 97 transitions. [2022-12-13 18:25:32,466 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 97 transitions. Word has length 28 [2022-12-13 18:25:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:32,467 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 97 transitions. [2022-12-13 18:25:32,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 97 transitions. [2022-12-13 18:25:32,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 18:25:32,468 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:32,468 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:32,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 18:25:32,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:32,668 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:32,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:32,669 INFO L85 PathProgramCache]: Analyzing trace with hash -895762126, now seen corresponding path program 1 times [2022-12-13 18:25:32,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:32,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628142521] [2022-12-13 18:25:32,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:32,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:32,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:32,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:32,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 18:25:32,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:32,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628142521] [2022-12-13 18:25:32,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628142521] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:32,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938747114] [2022-12-13 18:25:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:32,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:32,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:25:32,761 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:25:32,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 18:25:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:32,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 11 conjunts are in the unsatisfiable core [2022-12-13 18:25:32,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 18:25:32,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:25:32,872 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-12-13 18:25:32,872 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 12 treesize of output 11 [2022-12-13 18:25:32,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 18:25:32,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938747114] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:25:32,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:25:32,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2022-12-13 18:25:32,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83138636] [2022-12-13 18:25:32,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:25:32,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:25:32,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:32,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:25:32,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:25:32,890 INFO L87 Difference]: Start difference. First operand 88 states and 97 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 18:25:32,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:32,988 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2022-12-13 18:25:32,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 18:25:32,989 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-12-13 18:25:32,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:32,989 INFO L225 Difference]: With dead ends: 113 [2022-12-13 18:25:32,989 INFO L226 Difference]: Without dead ends: 113 [2022-12-13 18:25:32,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:25:32,990 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 124 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:32,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 209 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:25:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-12-13 18:25:32,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 91. [2022-12-13 18:25:32,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.5737704918032787) internal successors, (96), 86 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:25:32,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2022-12-13 18:25:32,996 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 29 [2022-12-13 18:25:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:32,996 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2022-12-13 18:25:32,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 18:25:32,996 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2022-12-13 18:25:32,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 18:25:32,997 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:32,997 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:33,001 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 18:25:33,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:33,198 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:33,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:33,199 INFO L85 PathProgramCache]: Analyzing trace with hash -895762125, now seen corresponding path program 1 times [2022-12-13 18:25:33,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:33,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443019633] [2022-12-13 18:25:33,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:33,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:33,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:33,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:33,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:33,499 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:33,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:33,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443019633] [2022-12-13 18:25:33,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443019633] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:33,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701600951] [2022-12-13 18:25:33,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:33,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:33,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:25:33,500 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:25:33,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 18:25:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:33,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-13 18:25:33,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:33,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:25:33,714 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:25:33,714 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 20 treesize of output 24 [2022-12-13 18:25:33,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:33,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701600951] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:25:33,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:25:33,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-12-13 18:25:33,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301845764] [2022-12-13 18:25:33,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:25:33,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-12-13 18:25:33,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:33,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-12-13 18:25:33,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-12-13 18:25:33,819 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 18:25:34,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:34,045 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2022-12-13 18:25:34,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 18:25:34,046 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-12-13 18:25:34,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:34,047 INFO L225 Difference]: With dead ends: 150 [2022-12-13 18:25:34,047 INFO L226 Difference]: Without dead ends: 150 [2022-12-13 18:25:34,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-12-13 18:25:34,048 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 199 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:34,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 748 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:25:34,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-12-13 18:25:34,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 91. [2022-12-13 18:25:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 86 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:25:34,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2022-12-13 18:25:34,053 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 29 [2022-12-13 18:25:34,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:34,053 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2022-12-13 18:25:34,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 18:25:34,053 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2022-12-13 18:25:34,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 18:25:34,054 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:34,054 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:34,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 18:25:34,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 18:25:34,255 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:34,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:34,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1998822125, now seen corresponding path program 1 times [2022-12-13 18:25:34,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:34,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164283906] [2022-12-13 18:25:34,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:34,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:34,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:34,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:25:34,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:34,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164283906] [2022-12-13 18:25:34,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164283906] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:34,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:34,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 18:25:34,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526666122] [2022-12-13 18:25:34,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:34,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 18:25:34,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:34,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 18:25:34,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:25:34,372 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:34,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:34,495 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2022-12-13 18:25:34,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:25:34,495 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-12-13 18:25:34,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:34,496 INFO L225 Difference]: With dead ends: 111 [2022-12-13 18:25:34,496 INFO L226 Difference]: Without dead ends: 111 [2022-12-13 18:25:34,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:25:34,497 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 136 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:34,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 294 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:25:34,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-12-13 18:25:34,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 90. [2022-12-13 18:25:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.540983606557377) internal successors, (94), 85 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:25:34,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2022-12-13 18:25:34,501 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 30 [2022-12-13 18:25:34,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:34,502 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2022-12-13 18:25:34,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:34,502 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2022-12-13 18:25:34,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-13 18:25:34,502 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:34,503 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:34,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 18:25:34,503 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:34,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:34,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1998822124, now seen corresponding path program 1 times [2022-12-13 18:25:34,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:34,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379678178] [2022-12-13 18:25:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:34,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:34,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:34,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:34,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:34,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:34,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379678178] [2022-12-13 18:25:34,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379678178] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:34,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:34,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 18:25:34,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151228804] [2022-12-13 18:25:34,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:34,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 18:25:34,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:34,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 18:25:34,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:25:34,709 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:34,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:34,835 INFO L93 Difference]: Finished difference Result 89 states and 99 transitions. [2022-12-13 18:25:34,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:25:34,836 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2022-12-13 18:25:34,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:34,836 INFO L225 Difference]: With dead ends: 89 [2022-12-13 18:25:34,836 INFO L226 Difference]: Without dead ends: 89 [2022-12-13 18:25:34,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-12-13 18:25:34,837 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 136 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:34,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 290 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:25:34,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-13 18:25:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-12-13 18:25:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.5245901639344261) internal successors, (93), 84 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:25:34,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2022-12-13 18:25:34,841 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 30 [2022-12-13 18:25:34,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:34,841 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2022-12-13 18:25:34,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:34,841 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2022-12-13 18:25:34,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 18:25:34,842 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:34,842 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-12-13 18:25:34,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 18:25:34,842 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:34,843 INFO L85 PathProgramCache]: Analyzing trace with hash 452746567, now seen corresponding path program 1 times [2022-12-13 18:25:34,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:34,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421900915] [2022-12-13 18:25:34,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:34,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:34,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:34,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:34,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:34,978 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 18:25:34,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:34,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421900915] [2022-12-13 18:25:34,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421900915] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:34,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:34,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 18:25:34,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553531679] [2022-12-13 18:25:34,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:34,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 18:25:34,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:34,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 18:25:34,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:25:34,980 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:35,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:35,220 INFO L93 Difference]: Finished difference Result 158 states and 173 transitions. [2022-12-13 18:25:35,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 18:25:35,220 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-12-13 18:25:35,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:35,221 INFO L225 Difference]: With dead ends: 158 [2022-12-13 18:25:35,221 INFO L226 Difference]: Without dead ends: 158 [2022-12-13 18:25:35,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-13 18:25:35,222 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 321 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:35,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 509 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:25:35,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-12-13 18:25:35,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 92. [2022-12-13 18:25:35,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.546875) internal successors, (99), 87 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:25:35,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2022-12-13 18:25:35,226 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 35 [2022-12-13 18:25:35,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:35,226 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2022-12-13 18:25:35,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:35,226 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2022-12-13 18:25:35,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-12-13 18:25:35,227 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:35,227 INFO L195 NwaCegarLoop]: trace histogram [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, 1] [2022-12-13 18:25:35,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 18:25:35,227 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:35,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:35,227 INFO L85 PathProgramCache]: Analyzing trace with hash 452746568, now seen corresponding path program 1 times [2022-12-13 18:25:35,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:35,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733673973] [2022-12-13 18:25:35,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:35,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:35,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:35,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:35,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:35,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:35,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733673973] [2022-12-13 18:25:35,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733673973] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:35,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:35,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 18:25:35,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062827797] [2022-12-13 18:25:35,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:35,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 18:25:35,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:35,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 18:25:35,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:25:35,466 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:35,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:35,717 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2022-12-13 18:25:35,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 18:25:35,717 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-12-13 18:25:35,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:35,718 INFO L225 Difference]: With dead ends: 138 [2022-12-13 18:25:35,718 INFO L226 Difference]: Without dead ends: 138 [2022-12-13 18:25:35,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-13 18:25:35,718 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 331 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:35,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 515 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:25:35,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-13 18:25:35,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 92. [2022-12-13 18:25:35,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 64 states have (on average 1.515625) internal successors, (97), 87 states have internal predecessors, (97), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:25:35,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 103 transitions. [2022-12-13 18:25:35,720 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 103 transitions. Word has length 35 [2022-12-13 18:25:35,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:35,721 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 103 transitions. [2022-12-13 18:25:35,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:35,721 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 103 transitions. [2022-12-13 18:25:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 18:25:35,721 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:35,721 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1] [2022-12-13 18:25:35,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 18:25:35,721 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:35,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:35,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1296521997, now seen corresponding path program 1 times [2022-12-13 18:25:35,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:35,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403191626] [2022-12-13 18:25:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:35,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:35,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:35,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:35,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:35,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:25:35,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:35,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403191626] [2022-12-13 18:25:35,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403191626] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:35,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:35,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 18:25:35,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447562285] [2022-12-13 18:25:35,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:35,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:25:35,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:35,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:25:35,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:25:35,791 INFO L87 Difference]: Start difference. First operand 92 states and 103 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:35,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:35,851 INFO L93 Difference]: Finished difference Result 121 states and 135 transitions. [2022-12-13 18:25:35,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 18:25:35,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2022-12-13 18:25:35,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:35,852 INFO L225 Difference]: With dead ends: 121 [2022-12-13 18:25:35,852 INFO L226 Difference]: Without dead ends: 121 [2022-12-13 18:25:35,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:25:35,853 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 90 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:35,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 209 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:25:35,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-12-13 18:25:35,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 94. [2022-12-13 18:25:35,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.5) internal successors, (99), 89 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:25:35,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2022-12-13 18:25:35,856 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 37 [2022-12-13 18:25:35,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:35,857 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2022-12-13 18:25:35,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:35,857 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2022-12-13 18:25:35,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-12-13 18:25:35,858 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:35,858 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-12-13 18:25:35,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 18:25:35,858 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:35,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:35,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1577337163, now seen corresponding path program 1 times [2022-12-13 18:25:35,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:35,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690944158] [2022-12-13 18:25:35,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:35,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:35,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:35,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:25:35,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:35,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690944158] [2022-12-13 18:25:35,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690944158] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:35,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:35,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 18:25:35,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988706280] [2022-12-13 18:25:35,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:35,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:25:35,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:35,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:25:35,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:25:35,937 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:36,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:36,002 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2022-12-13 18:25:36,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:25:36,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-12-13 18:25:36,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:36,003 INFO L225 Difference]: With dead ends: 170 [2022-12-13 18:25:36,004 INFO L226 Difference]: Without dead ends: 170 [2022-12-13 18:25:36,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:25:36,004 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 100 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:36,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 287 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:25:36,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-12-13 18:25:36,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 95. [2022-12-13 18:25:36,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 67 states have (on average 1.492537313432836) internal successors, (100), 90 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-13 18:25:36,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 106 transitions. [2022-12-13 18:25:36,006 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 106 transitions. Word has length 38 [2022-12-13 18:25:36,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:36,007 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 106 transitions. [2022-12-13 18:25:36,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:36,007 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 106 transitions. [2022-12-13 18:25:36,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-12-13 18:25:36,007 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:36,007 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:36,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 18:25:36,007 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:36,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:36,008 INFO L85 PathProgramCache]: Analyzing trace with hash -511950436, now seen corresponding path program 1 times [2022-12-13 18:25:36,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:36,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742334859] [2022-12-13 18:25:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:36,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:36,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:36,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:36,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:36,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-12-13 18:25:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-12-13 18:25:36,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:36,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742334859] [2022-12-13 18:25:36,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742334859] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:36,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016904107] [2022-12-13 18:25:36,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:36,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:36,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:25:36,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:25:36,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 18:25:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:36,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 18:25:36,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 18:25:36,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:25:36,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016904107] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:36,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:25:36,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-12-13 18:25:36,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075728436] [2022-12-13 18:25:36,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:36,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:25:36,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:36,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:25:36,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:25:36,248 INFO L87 Difference]: Start difference. First operand 95 states and 106 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 18:25:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:36,256 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-12-13 18:25:36,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:25:36,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-12-13 18:25:36,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:36,257 INFO L225 Difference]: With dead ends: 83 [2022-12-13 18:25:36,257 INFO L226 Difference]: Without dead ends: 83 [2022-12-13 18:25:36,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:25:36,257 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 63 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:36,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 105 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:25:36,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-12-13 18:25:36,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-12-13 18:25:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 79 states have internal predecessors, (86), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:36,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2022-12-13 18:25:36,260 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 41 [2022-12-13 18:25:36,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:36,260 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2022-12-13 18:25:36,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-13 18:25:36,260 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2022-12-13 18:25:36,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 18:25:36,261 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:36,261 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:36,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 18:25:36,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 18:25:36,462 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:36,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1002116999, now seen corresponding path program 1 times [2022-12-13 18:25:36,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:36,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28301936] [2022-12-13 18:25:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:36,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:36,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:36,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:36,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 18:25:36,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:36,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28301936] [2022-12-13 18:25:36,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28301936] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:36,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:36,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-12-13 18:25:36,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762848066] [2022-12-13 18:25:36,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:36,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 18:25:36,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:36,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 18:25:36,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:25:36,658 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:36,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:36,835 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2022-12-13 18:25:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 18:25:36,835 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2022-12-13 18:25:36,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:36,836 INFO L225 Difference]: With dead ends: 108 [2022-12-13 18:25:36,836 INFO L226 Difference]: Without dead ends: 108 [2022-12-13 18:25:36,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-12-13 18:25:36,837 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 290 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:36,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 317 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:25:36,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-12-13 18:25:36,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 86. [2022-12-13 18:25:36,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.4603174603174602) internal successors, (92), 82 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:36,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 96 transitions. [2022-12-13 18:25:36,840 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 96 transitions. Word has length 42 [2022-12-13 18:25:36,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:36,840 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 96 transitions. [2022-12-13 18:25:36,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:36,841 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 96 transitions. [2022-12-13 18:25:36,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-13 18:25:36,841 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:36,841 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:36,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 18:25:36,841 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:36,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:36,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1002116998, now seen corresponding path program 1 times [2022-12-13 18:25:36,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:36,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154823492] [2022-12-13 18:25:36,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:36,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:36,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:36,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:36,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:25:36,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:36,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154823492] [2022-12-13 18:25:36,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154823492] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:36,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767551377] [2022-12-13 18:25:36,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:36,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:36,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:25:36,946 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:25:36,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 18:25:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:37,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 18:25:37,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:25:37,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:25:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:25:37,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767551377] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:25:37,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:25:37,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-12-13 18:25:37,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724980922] [2022-12-13 18:25:37,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:25:37,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 18:25:37,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:37,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 18:25:37,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:25:37,165 INFO L87 Difference]: Start difference. First operand 86 states and 96 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 18:25:37,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:37,229 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2022-12-13 18:25:37,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:25:37,229 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2022-12-13 18:25:37,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:37,230 INFO L225 Difference]: With dead ends: 108 [2022-12-13 18:25:37,230 INFO L226 Difference]: Without dead ends: 108 [2022-12-13 18:25:37,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:25:37,231 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 184 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:37,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 254 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:25:37,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-12-13 18:25:37,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2022-12-13 18:25:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 79 states have (on average 1.481012658227848) internal successors, (117), 98 states have internal predecessors, (117), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 121 transitions. [2022-12-13 18:25:37,233 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 121 transitions. Word has length 42 [2022-12-13 18:25:37,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:37,233 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 121 transitions. [2022-12-13 18:25:37,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 18:25:37,233 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 121 transitions. [2022-12-13 18:25:37,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 18:25:37,234 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:37,234 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:37,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 18:25:37,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:37,436 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:37,437 INFO L85 PathProgramCache]: Analyzing trace with hash -960994977, now seen corresponding path program 1 times [2022-12-13 18:25:37,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:37,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988211522] [2022-12-13 18:25:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:37,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:38,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:38,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:38,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:38,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988211522] [2022-12-13 18:25:38,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988211522] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:38,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602920788] [2022-12-13 18:25:38,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:38,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:38,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:25:38,190 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:25:38,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 18:25:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:38,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 72 conjunts are in the unsatisfiable core [2022-12-13 18:25:38,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:38,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:25:38,433 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:25:38,433 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:25:38,456 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 11 treesize of output 7 [2022-12-13 18:25:38,500 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:25:38,500 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 18:25:38,532 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:25:38,532 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-13 18:25:38,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:25:38,566 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 31 treesize of output 26 [2022-12-13 18:25:38,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:25:38,687 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 31 treesize of output 26 [2022-12-13 18:25:38,740 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 25 treesize of output 13 [2022-12-13 18:25:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:38,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:25:39,012 INFO L321 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2022-12-13 18:25:39,012 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 19 treesize of output 18 [2022-12-13 18:25:39,119 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2201 (Array Int Int)) (v_ArrVal_2200 (Array Int Int))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_2200) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_2201) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) is different from false [2022-12-13 18:25:39,127 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:25:39,127 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 21 treesize of output 22 [2022-12-13 18:25:39,130 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 60 treesize of output 52 [2022-12-13 18:25:39,133 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 22 [2022-12-13 18:25:39,135 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 46 treesize of output 42 [2022-12-13 18:25:39,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602920788] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:39,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:25:39,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 29 [2022-12-13 18:25:39,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871588086] [2022-12-13 18:25:39,275 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:25:39,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 18:25:39,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:39,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 18:25:39,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1276, Unknown=26, NotChecked=72, Total=1482 [2022-12-13 18:25:39,277 INFO L87 Difference]: Start difference. First operand 102 states and 121 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:40,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:40,230 INFO L93 Difference]: Finished difference Result 220 states and 258 transitions. [2022-12-13 18:25:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-12-13 18:25:40,231 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-12-13 18:25:40,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:40,232 INFO L225 Difference]: With dead ends: 220 [2022-12-13 18:25:40,232 INFO L226 Difference]: Without dead ends: 220 [2022-12-13 18:25:40,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=284, Invalid=2046, Unknown=26, NotChecked=94, Total=2450 [2022-12-13 18:25:40,233 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 639 mSDsluCounter, 1110 mSDsCounter, 0 mSdLazyCounter, 1026 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:40,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [639 Valid, 1154 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1026 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 18:25:40,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-12-13 18:25:40,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 112. [2022-12-13 18:25:40,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 89 states have (on average 1.4831460674157304) internal successors, (132), 108 states have internal predecessors, (132), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:40,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2022-12-13 18:25:40,236 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 43 [2022-12-13 18:25:40,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:40,236 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2022-12-13 18:25:40,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 26 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2022-12-13 18:25:40,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-12-13 18:25:40,236 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:40,236 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:40,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 18:25:40,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:40,438 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:40,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:40,439 INFO L85 PathProgramCache]: Analyzing trace with hash -960994976, now seen corresponding path program 1 times [2022-12-13 18:25:40,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:40,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42123396] [2022-12-13 18:25:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:40,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:41,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:41,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:41,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:41,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42123396] [2022-12-13 18:25:41,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42123396] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:41,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108830337] [2022-12-13 18:25:41,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:41,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:41,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:25:41,386 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:25:41,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 18:25:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:41,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 98 conjunts are in the unsatisfiable core [2022-12-13 18:25:41,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:41,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:25:41,768 INFO L321 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2022-12-13 18:25:41,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 13 [2022-12-13 18:25:41,782 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:25:41,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:25:41,855 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 11 treesize of output 7 [2022-12-13 18:25:41,865 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 11 treesize of output 7 [2022-12-13 18:25:41,928 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:25:41,928 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 42 [2022-12-13 18:25:41,932 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 18 treesize of output 20 [2022-12-13 18:25:42,045 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:25:42,045 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-12-13 18:25:42,049 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 18 treesize of output 20 [2022-12-13 18:25:42,092 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 31 treesize of output 26 [2022-12-13 18:25:42,097 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 21 treesize of output 20 [2022-12-13 18:25:42,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:25:42,261 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 21 treesize of output 20 [2022-12-13 18:25:42,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:25:42,267 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 31 treesize of output 26 [2022-12-13 18:25:42,337 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 25 treesize of output 13 [2022-12-13 18:25:42,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2022-12-13 18:25:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:42,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:25:43,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:25:43,168 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 [2022-12-13 18:25:43,172 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 68 treesize of output 60 [2022-12-13 18:25:43,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-12-13 18:25:43,179 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 26 treesize of output 24 [2022-12-13 18:25:43,198 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:25:43,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 44 [2022-12-13 18:25:43,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:25:43,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 36 [2022-12-13 18:25:43,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:25:43,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:25:43,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2022-12-13 18:25:43,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:25:43,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:25:43,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-12-13 18:25:53,474 WARN L233 SmtUtils]: Spent 10.06s on a formula simplification. DAG size of input: 35 DAG size of output: 32 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:25:53,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108830337] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:53,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:25:53,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2022-12-13 18:25:53,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253552417] [2022-12-13 18:25:53,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:25:53,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-12-13 18:25:53,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:53,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-12-13 18:25:53,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2487, Unknown=2, NotChecked=0, Total=2652 [2022-12-13 18:25:53,476 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 34 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 18:25:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:54,737 INFO L93 Difference]: Finished difference Result 256 states and 314 transitions. [2022-12-13 18:25:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 18:25:54,738 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 34 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 43 [2022-12-13 18:25:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:54,739 INFO L225 Difference]: With dead ends: 256 [2022-12-13 18:25:54,740 INFO L226 Difference]: Without dead ends: 256 [2022-12-13 18:25:54,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=401, Invalid=3629, Unknown=2, NotChecked=0, Total=4032 [2022-12-13 18:25:54,742 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 910 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:54,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 1186 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 18:25:54,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-12-13 18:25:54,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 120. [2022-12-13 18:25:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 97 states have (on average 1.4742268041237114) internal successors, (143), 116 states have internal predecessors, (143), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:54,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 147 transitions. [2022-12-13 18:25:54,745 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 147 transitions. Word has length 43 [2022-12-13 18:25:54,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:54,745 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 147 transitions. [2022-12-13 18:25:54,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 34 states have internal predecessors, (69), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 18:25:54,745 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 147 transitions. [2022-12-13 18:25:54,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 18:25:54,745 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:54,746 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:54,750 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 18:25:54,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:54,948 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:54,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:54,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1252304435, now seen corresponding path program 2 times [2022-12-13 18:25:54,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:54,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493023684] [2022-12-13 18:25:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:54,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:55,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:55,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:55,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:25:55,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:55,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493023684] [2022-12-13 18:25:55,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493023684] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:55,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138779773] [2022-12-13 18:25:55,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:25:55,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:55,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:25:55,068 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:25:55,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 18:25:55,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:25:55,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:25:55,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:25:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:25:55,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:25:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 18:25:55,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138779773] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:25:55,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:25:55,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 8 [2022-12-13 18:25:55,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673795184] [2022-12-13 18:25:55,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:25:55,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 18:25:55,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:55,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 18:25:55,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:25:55,339 INFO L87 Difference]: Start difference. First operand 120 states and 147 transitions. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 18:25:55,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:55,429 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2022-12-13 18:25:55,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:25:55,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2022-12-13 18:25:55,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:55,430 INFO L225 Difference]: With dead ends: 112 [2022-12-13 18:25:55,430 INFO L226 Difference]: Without dead ends: 112 [2022-12-13 18:25:55,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-12-13 18:25:55,431 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 176 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:55,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 283 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:25:55,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-12-13 18:25:55,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2022-12-13 18:25:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 86 states have (on average 1.4186046511627908) internal successors, (122), 102 states have internal predecessors, (122), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:55,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2022-12-13 18:25:55,433 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 46 [2022-12-13 18:25:55,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:55,433 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2022-12-13 18:25:55,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 7 states have internal predecessors, (55), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-12-13 18:25:55,433 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2022-12-13 18:25:55,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 18:25:55,434 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:55,434 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:55,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 18:25:55,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:55,635 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:55,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:55,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1996676750, now seen corresponding path program 2 times [2022-12-13 18:25:55,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:55,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066153556] [2022-12-13 18:25:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:55,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:55,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:55,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:55,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:25:55,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:55,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066153556] [2022-12-13 18:25:55,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066153556] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:55,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022122998] [2022-12-13 18:25:55,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:25:55,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:55,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:25:55,744 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:25:55,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 18:25:55,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 18:25:55,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:25:55,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 31 conjunts are in the unsatisfiable core [2022-12-13 18:25:55,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:25:56,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:25:56,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022122998] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:56,024 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:25:56,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 15 [2022-12-13 18:25:56,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630463220] [2022-12-13 18:25:56,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:56,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 18:25:56,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:56,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 18:25:56,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:25:56,026 INFO L87 Difference]: Start difference. First operand 106 states and 126 transitions. Second operand has 11 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:56,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:56,253 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2022-12-13 18:25:56,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 18:25:56,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2022-12-13 18:25:56,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:56,254 INFO L225 Difference]: With dead ends: 147 [2022-12-13 18:25:56,254 INFO L226 Difference]: Without dead ends: 147 [2022-12-13 18:25:56,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-12-13 18:25:56,255 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 425 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:56,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 276 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:25:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-12-13 18:25:56,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 106. [2022-12-13 18:25:56,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 86 states have (on average 1.3953488372093024) internal successors, (120), 102 states have internal predecessors, (120), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:56,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 124 transitions. [2022-12-13 18:25:56,257 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 124 transitions. Word has length 47 [2022-12-13 18:25:56,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:56,257 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 124 transitions. [2022-12-13 18:25:56,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:56,257 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 124 transitions. [2022-12-13 18:25:56,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-13 18:25:56,257 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:56,257 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:56,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 18:25:56,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:56,459 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:56,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1996676805, now seen corresponding path program 1 times [2022-12-13 18:25:56,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:56,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283150246] [2022-12-13 18:25:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:56,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:56,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:56,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:56,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:56,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:56,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-12-13 18:25:56,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:56,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283150246] [2022-12-13 18:25:56,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283150246] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:56,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:25:56,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-13 18:25:56,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836909145] [2022-12-13 18:25:56,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:56,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 18:25:56,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:56,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 18:25:56,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-13 18:25:56,563 INFO L87 Difference]: Start difference. First operand 106 states and 124 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:56,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:56,604 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2022-12-13 18:25:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:25:56,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2022-12-13 18:25:56,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:56,605 INFO L225 Difference]: With dead ends: 103 [2022-12-13 18:25:56,605 INFO L226 Difference]: Without dead ends: 103 [2022-12-13 18:25:56,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-13 18:25:56,605 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 20 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:56,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 262 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:25:56,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-12-13 18:25:56,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2022-12-13 18:25:56,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 81 states have (on average 1.3333333333333333) internal successors, (108), 97 states have internal predecessors, (108), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2022-12-13 18:25:56,607 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 47 [2022-12-13 18:25:56,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:56,607 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2022-12-13 18:25:56,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2022-12-13 18:25:56,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 18:25:56,608 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:56,608 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:56,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-12-13 18:25:56,608 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:56,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:56,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1716069023, now seen corresponding path program 1 times [2022-12-13 18:25:56,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:56,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055174184] [2022-12-13 18:25:56,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:56,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:56,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:56,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:25:56,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:56,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055174184] [2022-12-13 18:25:56,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055174184] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:56,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867458752] [2022-12-13 18:25:56,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:56,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:56,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:25:56,720 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:25:56,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 18:25:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:56,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 18:25:56,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:25:56,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:25:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:25:56,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867458752] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:25:56,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:25:56,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-12-13 18:25:56,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340397003] [2022-12-13 18:25:56,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:25:56,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 18:25:56,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:56,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 18:25:56,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:25:56,956 INFO L87 Difference]: Start difference. First operand 101 states and 112 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:57,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:57,027 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2022-12-13 18:25:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:25:57,028 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-12-13 18:25:57,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:57,029 INFO L225 Difference]: With dead ends: 99 [2022-12-13 18:25:57,029 INFO L226 Difference]: Without dead ends: 99 [2022-12-13 18:25:57,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 100 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-12-13 18:25:57,030 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 61 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:57,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 329 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:25:57,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-12-13 18:25:57,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2022-12-13 18:25:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 93 states have internal predecessors, (101), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2022-12-13 18:25:57,032 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 51 [2022-12-13 18:25:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:57,032 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2022-12-13 18:25:57,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:57,032 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2022-12-13 18:25:57,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-13 18:25:57,032 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:57,032 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1] [2022-12-13 18:25:57,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 18:25:57,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-12-13 18:25:57,233 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:57,234 INFO L85 PathProgramCache]: Analyzing trace with hash -291844745, now seen corresponding path program 3 times [2022-12-13 18:25:57,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:57,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012535896] [2022-12-13 18:25:57,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:57,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:57,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:57,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:57,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:57,362 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 18:25:57,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:57,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012535896] [2022-12-13 18:25:57,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012535896] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:57,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704013466] [2022-12-13 18:25:57,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:25:57,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:57,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:25:57,363 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:25:57,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 18:25:57,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 18:25:57,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:25:57,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-13 18:25:57,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 18:25:57,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 18:25:57,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704013466] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:25:57,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 18:25:57,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-12-13 18:25:57,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524360936] [2022-12-13 18:25:57,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:25:57,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 18:25:57,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:25:57,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 18:25:57,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:25:57,798 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:57,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:25:57,815 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2022-12-13 18:25:57,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 18:25:57,815 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2022-12-13 18:25:57,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:25:57,816 INFO L225 Difference]: With dead ends: 93 [2022-12-13 18:25:57,816 INFO L226 Difference]: Without dead ends: 93 [2022-12-13 18:25:57,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:25:57,816 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 163 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:25:57,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 134 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:25:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-12-13 18:25:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 91. [2022-12-13 18:25:57,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.2916666666666667) internal successors, (93), 87 states have internal predecessors, (93), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:25:57,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 97 transitions. [2022-12-13 18:25:57,818 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 97 transitions. Word has length 51 [2022-12-13 18:25:57,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:25:57,818 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 97 transitions. [2022-12-13 18:25:57,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 18:25:57,819 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 97 transitions. [2022-12-13 18:25:57,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-12-13 18:25:57,819 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:25:57,819 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:25:57,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-13 18:25:58,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-12-13 18:25:58,021 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:25:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:25:58,022 INFO L85 PathProgramCache]: Analyzing trace with hash 878531443, now seen corresponding path program 1 times [2022-12-13 18:25:58,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:25:58,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311559473] [2022-12-13 18:25:58,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:58,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:25:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:59,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:25:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:59,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:25:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:25:59,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:25:59,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311559473] [2022-12-13 18:25:59,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311559473] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:25:59,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701297908] [2022-12-13 18:25:59,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:25:59,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:25:59,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:25:59,431 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:25:59,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 18:25:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:25:59,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 105 conjunts are in the unsatisfiable core [2022-12-13 18:25:59,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:25:59,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:25:59,828 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:25:59,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:25:59,900 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 11 treesize of output 7 [2022-12-13 18:25:59,960 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:25:59,960 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 18:26:00,065 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:26:00,065 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-12-13 18:26:00,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-12-13 18:26:00,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-12-13 18:26:00,282 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 13 treesize of output 9 [2022-12-13 18:26:00,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-12-13 18:26:00,543 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 16 treesize of output 18 [2022-12-13 18:26:00,718 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 28 treesize of output 10 [2022-12-13 18:26:00,809 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:26:00,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:26:00,951 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 8))) (and (forall ((v_ArrVal_3482 (Array Int Int))) (<= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_3482) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) (forall ((v_ArrVal_3482 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_update_at_~head#1.base| v_ArrVal_3482) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) |c_ULTIMATE.start_main_~len~0#1|)))) is different from false [2022-12-13 18:26:00,960 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 8))) (and (forall ((v_ArrVal_3482 (Array Int Int))) (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_update_at_#t~mem12#1.base| v_ArrVal_3482) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) |c_ULTIMATE.start_main_~len~0#1|)) (forall ((v_ArrVal_3482 (Array Int Int))) (<= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_update_at_#t~mem12#1.base| v_ArrVal_3482) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))))) is different from false [2022-12-13 18:26:01,076 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)) (.cse1 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 8))) (and (forall ((v_ArrVal_3482 (Array Int Int))) (<= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| .cse0 v_ArrVal_3482) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1))) (forall ((v_ArrVal_3482 (Array Int Int))) (<= (select (select (store |c_#memory_int| .cse0 v_ArrVal_3482) |c_ULTIMATE.start_main_~s~0#1.base|) .cse1) |c_ULTIMATE.start_main_~len~0#1|)))) is different from false [2022-12-13 18:26:01,089 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:26:01,089 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 36 treesize of output 37 [2022-12-13 18:26:01,095 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:26:01,096 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 64 treesize of output 63 [2022-12-13 18:26:01,101 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 25 treesize of output 21 [2022-12-13 18:26:01,116 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:26:01,116 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 36 treesize of output 37 [2022-12-13 18:26:01,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:26:01,120 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 52 [2022-12-13 18:26:01,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-12-13 18:26:01,358 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3475 (Array Int Int))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_3475) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) is different from false [2022-12-13 18:26:01,363 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3474 (Array Int Int)) (v_ArrVal_3475 (Array Int Int))) (not (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_3474) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_3475) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) is different from false [2022-12-13 18:26:01,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:26:01,370 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 22 treesize of output 23 [2022-12-13 18:26:01,372 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 131 treesize of output 119 [2022-12-13 18:26:01,376 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 6 treesize of output 4 [2022-12-13 18:26:01,380 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 6 treesize of output 4 [2022-12-13 18:26:01,383 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 6 treesize of output 4 [2022-12-13 18:26:01,847 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2022-12-13 18:26:01,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701297908] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:26:01,847 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:26:01,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 28] total 78 [2022-12-13 18:26:01,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043507704] [2022-12-13 18:26:01,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:26:01,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-12-13 18:26:01,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:26:01,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-12-13 18:26:01,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=4971, Unknown=46, NotChecked=730, Total=6006 [2022-12-13 18:26:01,851 INFO L87 Difference]: Start difference. First operand 91 states and 97 transitions. Second operand has 78 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 69 states have internal predecessors, (136), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 18:26:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:26:07,440 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2022-12-13 18:26:07,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 18:26:07,441 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 69 states have internal predecessors, (136), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2022-12-13 18:26:07,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:26:07,442 INFO L225 Difference]: With dead ends: 91 [2022-12-13 18:26:07,442 INFO L226 Difference]: Without dead ends: 91 [2022-12-13 18:26:07,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 99 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=762, Invalid=8331, Unknown=47, NotChecked=960, Total=10100 [2022-12-13 18:26:07,444 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 862 mSDsluCounter, 1580 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 862 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 2091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 427 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:26:07,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [862 Valid, 1628 Invalid, 2091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1620 Invalid, 0 Unknown, 427 Unchecked, 1.1s Time] [2022-12-13 18:26:07,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-12-13 18:26:07,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-12-13 18:26:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.2777777777777777) internal successors, (92), 87 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:26:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2022-12-13 18:26:07,446 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 54 [2022-12-13 18:26:07,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:26:07,446 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2022-12-13 18:26:07,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.7662337662337662) internal successors, (136), 69 states have internal predecessors, (136), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-12-13 18:26:07,446 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2022-12-13 18:26:07,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-12-13 18:26:07,446 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:26:07,446 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:26:07,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-13 18:26:07,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-12-13 18:26:07,648 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:26:07,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:26:07,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1199894254, now seen corresponding path program 1 times [2022-12-13 18:26:07,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:26:07,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580213421] [2022-12-13 18:26:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:26:07,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:26:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:26:07,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:26:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:26:07,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:26:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:26:07,955 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 18:26:07,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:26:07,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580213421] [2022-12-13 18:26:07,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580213421] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:26:07,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490709348] [2022-12-13 18:26:07,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:26:07,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:26:07,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:26:07,956 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:26:07,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 18:26:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:26:08,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 18:26:08,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:26:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:26:08,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:26:08,544 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:26:08,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490709348] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:26:08,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:26:08,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2022-12-13 18:26:08,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309463243] [2022-12-13 18:26:08,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:26:08,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-12-13 18:26:08,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:26:08,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-12-13 18:26:08,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-12-13 18:26:08,546 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand has 30 states, 29 states have (on average 3.9655172413793105) internal successors, (115), 26 states have internal predecessors, (115), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 18:26:08,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:26:08,827 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2022-12-13 18:26:08,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:26:08,828 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.9655172413793105) internal successors, (115), 26 states have internal predecessors, (115), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 57 [2022-12-13 18:26:08,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:26:08,828 INFO L225 Difference]: With dead ends: 125 [2022-12-13 18:26:08,828 INFO L226 Difference]: Without dead ends: 125 [2022-12-13 18:26:08,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2022-12-13 18:26:08,829 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 868 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:26:08,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [868 Valid, 500 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:26:08,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-12-13 18:26:08,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 91. [2022-12-13 18:26:08,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 72 states have (on average 1.2638888888888888) internal successors, (91), 87 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:26:08,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-12-13 18:26:08,831 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 57 [2022-12-13 18:26:08,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:26:08,832 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-12-13 18:26:08,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.9655172413793105) internal successors, (115), 26 states have internal predecessors, (115), 1 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2022-12-13 18:26:08,832 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-12-13 18:26:08,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 18:26:08,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:26:08,832 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:26:08,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 18:26:09,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-12-13 18:26:09,034 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:26:09,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:26:09,035 INFO L85 PathProgramCache]: Analyzing trace with hash 963119259, now seen corresponding path program 1 times [2022-12-13 18:26:09,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:26:09,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721771754] [2022-12-13 18:26:09,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:26:09,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:26:09,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:26:09,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:26:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:26:09,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:26:09,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:26:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:26:09,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:26:09,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721771754] [2022-12-13 18:26:09,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721771754] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:26:09,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739072581] [2022-12-13 18:26:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:26:09,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:26:09,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:26:09,932 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:26:09,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 18:26:10,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:26:10,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 85 conjunts are in the unsatisfiable core [2022-12-13 18:26:10,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:26:10,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:26:10,218 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:26:10,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:26:10,239 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 11 treesize of output 7 [2022-12-13 18:26:10,296 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:26:10,296 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-12-13 18:26:10,326 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:26:10,327 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-12-13 18:26:10,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:26:10,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-12-13 18:26:10,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:26:10,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2022-12-13 18:26:10,619 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:26:10,619 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-12-13 18:26:10,734 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 25 treesize of output 13 [2022-12-13 18:26:10,738 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:26:10,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:26:10,767 INFO L321 Elim1Store]: treesize reduction 5, result has 66.7 percent of original size [2022-12-13 18:26:10,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2022-12-13 18:26:10,927 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3877 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) (= (select (select (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_3877) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|) .cse0))) is different from false [2022-12-13 18:26:11,001 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| Int) (v_ArrVal_3876 Int) (v_ArrVal_3877 (Array Int Int))) (or (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| 8) v_ArrVal_3876))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_main_~s~0#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base| .cse1) .cse0 v_ArrVal_3877) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|)))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2022-12-13 18:26:11,008 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| Int) (v_ArrVal_3876 Int) (v_ArrVal_3877 (Array Int Int))) (or (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_#res#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| 8) v_ArrVal_3876))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_create_#res#1.offset|))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_#res#1.base| .cse0) .cse1 v_ArrVal_3877) |c_ULTIMATE.start_dll_circular_create_#res#1.base|) |c_ULTIMATE.start_dll_circular_create_#res#1.offset|) .cse1))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| |c_ULTIMATE.start_dll_circular_create_#res#1.offset|))) is different from false [2022-12-13 18:26:11,016 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| Int) (v_ArrVal_3876 Int) (v_ArrVal_3877 (Array Int Int))) (or (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| 8) v_ArrVal_3876))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (= (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse0) .cse1 v_ArrVal_3877) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) .cse1))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2022-12-13 18:26:11,032 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| Int) (v_ArrVal_3876 Int) (v_ArrVal_3873 Int) (v_ArrVal_3877 (Array Int Int))) (or (let ((.cse1 (store (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_3873) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| 8) v_ArrVal_3876))) (let ((.cse0 (select .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1) .cse0 v_ArrVal_3877) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2022-12-13 18:26:11,042 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| Int) (v_ArrVal_3876 Int) (v_ArrVal_3872 (Array Int Int)) (v_ArrVal_3873 Int) (v_ArrVal_3877 (Array Int Int))) (or (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_3872))) (let ((.cse1 (store (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_3873) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| 8) v_ArrVal_3876))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (= (select (select (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1) .cse2 v_ArrVal_3877) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) .cse2)))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) is different from false [2022-12-13 18:26:11,165 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| Int) (v_ArrVal_3876 Int) (v_ArrVal_3871 (Array Int Int)) (v_ArrVal_3872 (Array Int Int)) (v_ArrVal_3873 Int) (v_ArrVal_3877 (Array Int Int))) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) (let ((.cse0 (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_3871) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_3872))) (let ((.cse1 (store (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) v_ArrVal_3873) (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_29| 8) v_ArrVal_3876))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) (= (select (select (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| .cse1) .cse2 v_ArrVal_3877) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) .cse2)))))) is different from false [2022-12-13 18:26:11,180 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:26:11,180 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 109 treesize of output 86 [2022-12-13 18:26:11,184 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 244 treesize of output 236 [2022-12-13 18:26:11,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:26:11,192 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 126 treesize of output 118 [2022-12-13 18:26:11,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:26:11,198 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 38 treesize of output 34 [2022-12-13 18:26:11,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:26:11,204 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 46 treesize of output 40 [2022-12-13 18:26:11,207 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 70 treesize of output 62 [2022-12-13 18:26:11,570 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 12 refuted. 3 times theorem prover too weak. 1 trivial. 6 not checked. [2022-12-13 18:26:11,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739072581] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:26:11,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:26:11,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24, 26] total 57 [2022-12-13 18:26:11,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206643032] [2022-12-13 18:26:11,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:26:11,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-13 18:26:11,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:26:11,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-13 18:26:11,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2367, Unknown=47, NotChecked=728, Total=3306 [2022-12-13 18:26:11,572 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 58 states, 57 states have (on average 2.263157894736842) internal successors, (129), 51 states have internal predecessors, (129), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 18:26:13,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:26:13,558 INFO L93 Difference]: Finished difference Result 150 states and 156 transitions. [2022-12-13 18:26:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 18:26:13,559 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.263157894736842) internal successors, (129), 51 states have internal predecessors, (129), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 60 [2022-12-13 18:26:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:26:13,560 INFO L225 Difference]: With dead ends: 150 [2022-12-13 18:26:13,560 INFO L226 Difference]: Without dead ends: 150 [2022-12-13 18:26:13,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 86 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 7 IntricatePredicates, 1 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=434, Invalid=4377, Unknown=47, NotChecked=994, Total=5852 [2022-12-13 18:26:13,563 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 842 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 1434 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 2304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 840 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-12-13 18:26:13,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 1378 Invalid, 2304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1434 Invalid, 0 Unknown, 840 Unchecked, 0.8s Time] [2022-12-13 18:26:13,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-12-13 18:26:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 95. [2022-12-13 18:26:13,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 91 states have internal predecessors, (98), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-12-13 18:26:13,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2022-12-13 18:26:13,564 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 60 [2022-12-13 18:26:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:26:13,565 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2022-12-13 18:26:13,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.263157894736842) internal successors, (129), 51 states have internal predecessors, (129), 3 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-12-13 18:26:13,565 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2022-12-13 18:26:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-12-13 18:26:13,565 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:26:13,565 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:26:13,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 18:26:13,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:26:13,766 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-12-13 18:26:13,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:26:13,767 INFO L85 PathProgramCache]: Analyzing trace with hash 963119260, now seen corresponding path program 1 times [2022-12-13 18:26:13,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:26:13,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087916251] [2022-12-13 18:26:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:26:13,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:26:13,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:26:14,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 18:26:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:26:14,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-12-13 18:26:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:26:15,013 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:26:15,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:26:15,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087916251] [2022-12-13 18:26:15,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087916251] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:26:15,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440079865] [2022-12-13 18:26:15,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:26:15,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:26:15,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:26:15,015 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:26:15,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_daaf250e-199c-40c9-848f-5eceac19741a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 18:26:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:26:15,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 112 conjunts are in the unsatisfiable core [2022-12-13 18:26:15,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:26:15,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-12-13 18:26:15,395 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 18:26:15,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 18:26:15,411 WARN L837 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|)) (= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (<= |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset| 0) (or (exists ((|v_#length_BEFORE_CALL_6| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_6| |c_#length|))) (and (= |c_#length| (store |v_#length_BEFORE_CALL_6| .cse0 (select |c_#length| .cse0))) (= .cse0 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|) (<= 12 (select |v_#length_BEFORE_CALL_6| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))))) (<= 12 (select |c_#length| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)))) is different from false [2022-12-13 18:26:15,414 WARN L859 $PredicateComparison]: unable to prove that (and (<= 0 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|)) (= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (<= |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset| 0) (or (exists ((|v_#length_BEFORE_CALL_6| (Array Int Int))) (let ((.cse0 (@diff |v_#length_BEFORE_CALL_6| |c_#length|))) (and (= |c_#length| (store |v_#length_BEFORE_CALL_6| .cse0 (select |c_#length| .cse0))) (= .cse0 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|) (<= 12 (select |v_#length_BEFORE_CALL_6| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))))) (<= 12 (select |c_#length| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)))) is different from true [2022-12-13 18:26:15,478 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 11 treesize of output 7 [2022-12-13 18:26:15,487 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 11 treesize of output 7 [2022-12-13 18:26:15,541 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:26:15,542 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 42 [2022-12-13 18:26:15,549 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 18 treesize of output 20 [2022-12-13 18:26:15,658 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:26:15,659 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-12-13 18:26:15,662 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 18 treesize of output 20 [2022-12-13 18:26:15,715 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 21 treesize of output 20 [2022-12-13 18:26:15,721 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 31 treesize of output 26 [2022-12-13 18:26:15,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:26:15,869 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 31 treesize of output 26 [2022-12-13 18:26:15,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:26:15,875 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 21 treesize of output 20 [2022-12-13 18:26:16,137 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-12-13 18:26:16,138 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-12-13 18:26:16,143 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 27 treesize of output 27 [2022-12-13 18:26:16,365 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 25 treesize of output 13 [2022-12-13 18:26:16,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2022-12-13 18:26:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:26:16,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:26:38,968 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (forall ((v_ArrVal_4084 Int) (v_ArrVal_4083 Int) (v_ArrVal_4079 (Array Int Int)) (v_ArrVal_4080 (Array Int Int)) (|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_32| Int)) (or (forall ((v_ArrVal_4087 Int)) (let ((.cse0 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_4080)) (.cse6 (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_32| 8))) (let ((.cse1 (store (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) .cse5 v_ArrVal_4083) .cse6 v_ArrVal_4087))) (or (forall ((v_ArrVal_4089 (Array Int Int)) (v_ArrVal_4090 (Array Int Int)) (v_ArrVal_4086 Int)) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_4079))) (let ((.cse4 (store (store (select .cse3 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) .cse5 v_ArrVal_4084) .cse6 v_ArrVal_4086))) (let ((.cse2 (select .cse4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (<= (+ 12 (select (select (store (store .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1) .cse2 v_ArrVal_4089) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (select |c_#length| (select (select (store (store .cse3 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse4) .cse2 v_ArrVal_4090) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))))))) (< (+ (select .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) 8) 0))))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_32| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (forall ((v_ArrVal_4084 Int) (v_ArrVal_4083 Int) (v_ArrVal_4079 (Array Int Int)) (v_ArrVal_4080 (Array Int Int)) (|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_32| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_32| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (forall ((v_ArrVal_4087 Int)) (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_4080)) (.cse9 (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_32| 8))) (let ((.cse7 (store (store (select .cse8 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) .cse5 v_ArrVal_4083) .cse9 v_ArrVal_4087))) (or (< (+ (select .cse7 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) 8) 0) (forall ((v_ArrVal_4089 (Array Int Int)) (v_ArrVal_4086 Int)) (<= 0 (+ 8 (select (select (store (store .cse8 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse7) (select (store (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_4079) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) .cse5 v_ArrVal_4084) .cse9 v_ArrVal_4086) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) v_ArrVal_4089) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)))))))))))) is different from false [2022-12-13 18:26:39,033 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4))) (and (forall ((v_ArrVal_4084 Int) (v_ArrVal_4083 Int) (v_ArrVal_4079 (Array Int Int)) (v_ArrVal_4080 (Array Int Int)) (|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_32| Int)) (or (forall ((v_ArrVal_4087 Int)) (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_4080)) (.cse6 (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_32| 8))) (let ((.cse0 (store (store (select .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) .cse5 v_ArrVal_4083) .cse6 v_ArrVal_4087))) (or (< (+ 8 (select .cse0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)) 0) (forall ((v_ArrVal_4089 (Array Int Int)) (v_ArrVal_4090 (Array Int Int)) (v_ArrVal_4086 Int)) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_4079))) (let ((.cse4 (store (store (select .cse3 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) .cse5 v_ArrVal_4084) .cse6 v_ArrVal_4086))) (let ((.cse2 (select .cse4 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) (<= (+ 12 (select (select (store (store .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| .cse0) .cse2 v_ArrVal_4089) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)) (select |c_#length| (select (select (store (store .cse3 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| .cse4) .cse2 v_ArrVal_4090) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))))))))))) (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_32| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) (forall ((v_ArrVal_4084 Int) (v_ArrVal_4083 Int) (v_ArrVal_4079 (Array Int Int)) (v_ArrVal_4080 (Array Int Int)) (|v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_32| Int)) (or (< |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_32| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) (forall ((v_ArrVal_4087 Int)) (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_4080)) (.cse9 (+ |v_ULTIMATE.start_dll_circular_update_at_~head#1.offset_32| 8))) (let ((.cse7 (store (store (select .cse8 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) .cse5 v_ArrVal_4083) .cse9 v_ArrVal_4087))) (or (< (+ 8 (select .cse7 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)) 0) (forall ((v_ArrVal_4089 (Array Int Int)) (v_ArrVal_4086 Int)) (<= 0 (+ 8 (select (select (store (store .cse8 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| .cse7) (select (store (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_4079) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) .cse5 v_ArrVal_4084) .cse9 v_ArrVal_4086) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) v_ArrVal_4089) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)))))))))))) is different from false [2022-12-13 18:26:40,019 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:26:40,020 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 321 treesize of output 282 [2022-12-13 18:26:40,029 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 1638 treesize of output 1628 [2022-12-13 18:26:40,041 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:26:40,041 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 1621 treesize of output 1310 [2022-12-13 18:26:40,055 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 9070 treesize of output 8908 [2022-12-13 18:26:40,094 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 9198 treesize of output 9164 [2022-12-13 18:26:40,128 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 9758 treesize of output 9690 [2022-12-13 18:26:40,166 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 10012 treesize of output 9972 [2022-12-13 18:26:40,208 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 9967 treesize of output 9775 [2022-12-13 18:26:40,248 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 10526 treesize of output 10348 [2022-12-13 18:26:40,330 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 11591 treesize of output 11303 [2022-12-13 18:26:40,387 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 11927 treesize of output 11783 [2022-12-13 18:26:40,442 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 11783 treesize of output 11591 [2022-12-13 18:26:40,501 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 11711 treesize of output 11679 [2022-12-13 18:26:40,558 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 11919 treesize of output 11855 [2022-12-13 18:26:40,619 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 11891 treesize of output 11883 [2022-12-13 18:26:40,680 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 11901 treesize of output 11897 [2022-12-13 18:26:40,736 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 11897 treesize of output 11889