./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0232_1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0232_1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --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 f7b1141c3157e34a4974729c197a93a4b99ad75fc020122df5d99d43bcc85e27 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:52:41,353 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:52:41,456 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:52:41,462 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:52:41,462 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:52:41,486 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:52:41,487 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:52:41,487 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:52:41,488 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:52:41,489 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:52:41,489 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:52:41,490 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:52:41,491 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:52:41,492 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:52:41,492 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:52:41,493 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:52:41,494 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:52:41,494 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:52:41,495 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:52:41,496 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:52:41,496 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:52:41,501 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:52:41,501 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:52:41,502 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:52:41,502 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:52:41,503 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:52:41,503 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:52:41,503 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:52:41,504 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:52:41,504 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:52:41,505 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:52:41,505 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:52:41,505 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:52:41,506 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:52:41,506 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:52:41,507 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:52:41,507 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:52:41,508 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:52:41,508 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:52:41,508 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:52:41,509 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:52:41,510 INFO L153 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_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7b1141c3157e34a4974729c197a93a4b99ad75fc020122df5d99d43bcc85e27 [2023-11-24 21:52:41,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:52:41,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:52:41,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:52:41,868 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:52:41,879 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:52:41,881 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/list-ext-properties/test-0232_1-2.i [2023-11-24 21:52:44,964 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:52:45,307 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:52:45,307 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/sv-benchmarks/c/list-ext-properties/test-0232_1-2.i [2023-11-24 21:52:45,334 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/data/beb46f287/33d29a7fcecc4be48c9428a745db6f39/FLAG0574e54be [2023-11-24 21:52:45,356 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/data/beb46f287/33d29a7fcecc4be48c9428a745db6f39 [2023-11-24 21:52:45,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:52:45,363 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:52:45,364 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:52:45,365 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:52:45,370 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:52:45,371 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:52:45" (1/1) ... [2023-11-24 21:52:45,372 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4831bc4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:45, skipping insertion in model container [2023-11-24 21:52:45,372 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:52:45" (1/1) ... [2023-11-24 21:52:45,418 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:52:45,782 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:52:45,796 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:52:45,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:52:45,877 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:52:45,877 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:45 WrapperNode [2023-11-24 21:52:45,877 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:52:45,879 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:52:45,879 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:52:45,879 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:52:45,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:45" (1/1) ... [2023-11-24 21:52:45,902 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:45" (1/1) ... [2023-11-24 21:52:45,927 INFO L138 Inliner]: procedures = 126, calls = 33, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 99 [2023-11-24 21:52:45,927 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:52:45,928 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:52:45,928 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:52:45,929 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:52:45,940 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:45" (1/1) ... [2023-11-24 21:52:45,940 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:45" (1/1) ... [2023-11-24 21:52:45,945 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:45" (1/1) ... [2023-11-24 21:52:45,969 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 8, 10]. 50 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 5 writes are split as follows [0, 2, 3]. [2023-11-24 21:52:45,969 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:45" (1/1) ... [2023-11-24 21:52:45,970 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:45" (1/1) ... [2023-11-24 21:52:45,986 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:45" (1/1) ... [2023-11-24 21:52:45,998 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:45" (1/1) ... [2023-11-24 21:52:46,001 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:45" (1/1) ... [2023-11-24 21:52:46,003 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:45" (1/1) ... [2023-11-24 21:52:46,007 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:52:46,013 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:52:46,013 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:52:46,014 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:52:46,015 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:45" (1/1) ... [2023-11-24 21:52:46,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:52:46,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:52:46,059 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:52:46,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:52:46,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:52:46,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:52:46,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:52:46,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:52:46,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:52:46,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:52:46,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:52:46,121 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:52:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:52:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:52:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-24 21:52:46,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-24 21:52:46,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-24 21:52:46,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:52:46,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:52:46,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:52:46,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:52:46,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:52:46,325 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:52:46,328 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:52:46,707 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:52:46,760 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:52:46,771 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:52:46,772 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:52:46 BoogieIcfgContainer [2023-11-24 21:52:46,772 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:52:46,775 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:52:46,777 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:52:46,780 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:52:46,782 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:52:45" (1/3) ... [2023-11-24 21:52:46,783 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@462f3c5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:52:46, skipping insertion in model container [2023-11-24 21:52:46,783 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:52:45" (2/3) ... [2023-11-24 21:52:46,784 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@462f3c5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:52:46, skipping insertion in model container [2023-11-24 21:52:46,784 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:52:46" (3/3) ... [2023-11-24 21:52:46,786 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0232_1-2.i [2023-11-24 21:52:46,807 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:52:46,807 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2023-11-24 21:52:46,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:52:46,871 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;@7a430ae3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:52:46,871 INFO L358 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2023-11-24 21:52:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand has 79 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 78 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:46,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 21:52:46,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:46,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 21:52:46,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:46,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:46,893 INFO L85 PathProgramCache]: Analyzing trace with hash 155876, now seen corresponding path program 1 times [2023-11-24 21:52:46,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:46,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048108417] [2023-11-24 21:52:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:46,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:47,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:47,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:47,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048108417] [2023-11-24 21:52:47,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048108417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:47,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:47,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:52:47,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093903025] [2023-11-24 21:52:47,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:47,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:52:47,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:47,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:52:47,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:52:47,344 INFO L87 Difference]: Start difference. First operand has 79 states, 34 states have (on average 2.4705882352941178) internal successors, (84), 78 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:47,583 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2023-11-24 21:52:47,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:52:47,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-24 21:52:47,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:47,594 INFO L225 Difference]: With dead ends: 73 [2023-11-24 21:52:47,598 INFO L226 Difference]: Without dead ends: 72 [2023-11-24 21:52:47,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:52:47,604 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 77 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:47,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 59 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:52:47,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-24 21:52:47,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-11-24 21:52:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 71 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:47,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2023-11-24 21:52:47,698 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 3 [2023-11-24 21:52:47,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:47,699 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2023-11-24 21:52:47,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:47,699 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2023-11-24 21:52:47,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 21:52:47,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:47,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 21:52:47,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:52:47,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:47,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:47,701 INFO L85 PathProgramCache]: Analyzing trace with hash 155877, now seen corresponding path program 1 times [2023-11-24 21:52:47,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:47,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968138166] [2023-11-24 21:52:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:47,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:47,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:47,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968138166] [2023-11-24 21:52:47,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968138166] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:47,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:48,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:52:48,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655935861] [2023-11-24 21:52:48,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:48,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:52:48,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:48,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:52:48,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:52:48,008 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:48,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:48,179 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2023-11-24 21:52:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:52:48,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-24 21:52:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:48,185 INFO L225 Difference]: With dead ends: 81 [2023-11-24 21:52:48,186 INFO L226 Difference]: Without dead ends: 81 [2023-11-24 21:52:48,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:52:48,189 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 64 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:48,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 65 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:52:48,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-24 21:52:48,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2023-11-24 21:52:48,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 38 states have (on average 2.0526315789473686) internal successors, (78), 71 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2023-11-24 21:52:48,215 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 3 [2023-11-24 21:52:48,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:48,215 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2023-11-24 21:52:48,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:48,216 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2023-11-24 21:52:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 21:52:48,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:48,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 21:52:48,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:52:48,217 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:48,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:48,219 INFO L85 PathProgramCache]: Analyzing trace with hash 4832136, now seen corresponding path program 1 times [2023-11-24 21:52:48,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:48,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363023093] [2023-11-24 21:52:48,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:48,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:48,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:48,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:48,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363023093] [2023-11-24 21:52:48,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363023093] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:48,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:48,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:52:48,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087131409] [2023-11-24 21:52:48,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:48,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:52:48,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:48,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:52:48,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:52:48,296 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:48,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:48,396 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2023-11-24 21:52:48,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:48,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-24 21:52:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:48,398 INFO L225 Difference]: With dead ends: 68 [2023-11-24 21:52:48,398 INFO L226 Difference]: Without dead ends: 68 [2023-11-24 21:52:48,398 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 [2023-11-24 21:52:48,400 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:48,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 75 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:52:48,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-11-24 21:52:48,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-11-24 21:52:48,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2023-11-24 21:52:48,406 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 4 [2023-11-24 21:52:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:48,406 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2023-11-24 21:52:48,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2023-11-24 21:52:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 21:52:48,407 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:48,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 21:52:48,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:52:48,408 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:48,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:48,409 INFO L85 PathProgramCache]: Analyzing trace with hash 4832137, now seen corresponding path program 1 times [2023-11-24 21:52:48,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:48,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677722404] [2023-11-24 21:52:48,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:48,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:48,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:48,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677722404] [2023-11-24 21:52:48,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677722404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:48,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:48,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:52:48,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235524763] [2023-11-24 21:52:48,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:48,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:52:48,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:48,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:52:48,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:52:48,467 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:48,528 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2023-11-24 21:52:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:48,529 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-24 21:52:48,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:48,529 INFO L225 Difference]: With dead ends: 64 [2023-11-24 21:52:48,530 INFO L226 Difference]: Without dead ends: 64 [2023-11-24 21:52:48,530 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 [2023-11-24 21:52:48,531 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 8 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:48,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 81 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:52:48,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-24 21:52:48,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-24 21:52:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 63 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:48,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2023-11-24 21:52:48,538 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 4 [2023-11-24 21:52:48,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:48,538 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2023-11-24 21:52:48,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:48,539 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2023-11-24 21:52:48,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:52:48,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:48,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:48,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:52:48,540 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:48,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:48,541 INFO L85 PathProgramCache]: Analyzing trace with hash 214691204, now seen corresponding path program 1 times [2023-11-24 21:52:48,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:48,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027897929] [2023-11-24 21:52:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:48,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:48,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:48,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:48,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:48,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027897929] [2023-11-24 21:52:48,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027897929] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:48,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:48,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:52:48,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658131378] [2023-11-24 21:52:48,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:48,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:52:48,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:48,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:52:48,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:52:48,757 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:48,964 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2023-11-24 21:52:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:52:48,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 21:52:48,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:48,968 INFO L225 Difference]: With dead ends: 72 [2023-11-24 21:52:48,968 INFO L226 Difference]: Without dead ends: 72 [2023-11-24 21:52:48,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:52:48,971 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 14 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:48,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 283 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:52:48,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-24 21:52:48,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2023-11-24 21:52:48,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 43 states have (on average 1.744186046511628) internal successors, (75), 68 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2023-11-24 21:52:48,983 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 8 [2023-11-24 21:52:48,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:48,984 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2023-11-24 21:52:48,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:48,984 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2023-11-24 21:52:48,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:52:48,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:48,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:48,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:52:48,987 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:48,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:48,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1527146394, now seen corresponding path program 1 times [2023-11-24 21:52:48,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:48,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591012052] [2023-11-24 21:52:48,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:48,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:49,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:49,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591012052] [2023-11-24 21:52:49,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591012052] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:49,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:49,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:52:49,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751471044] [2023-11-24 21:52:49,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:49,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:52:49,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:49,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:52:49,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:52:49,284 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:49,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:49,458 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2023-11-24 21:52:49,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:52:49,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 21:52:49,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:49,467 INFO L225 Difference]: With dead ends: 79 [2023-11-24 21:52:49,469 INFO L226 Difference]: Without dead ends: 79 [2023-11-24 21:52:49,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:52:49,470 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 49 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:49,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 96 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:52:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-24 21:52:49,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2023-11-24 21:52:49,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 67 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:49,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2023-11-24 21:52:49,483 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 12 [2023-11-24 21:52:49,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:49,484 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2023-11-24 21:52:49,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:49,484 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2023-11-24 21:52:49,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:52:49,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:49,485 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:49,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:52:49,486 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:49,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:49,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1527146395, now seen corresponding path program 1 times [2023-11-24 21:52:49,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:49,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787475138] [2023-11-24 21:52:49,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:49,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:49,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:49,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:49,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787475138] [2023-11-24 21:52:49,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787475138] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:49,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:49,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:52:49,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636164809] [2023-11-24 21:52:49,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:49,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:52:49,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:49,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:52:49,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:52:49,805 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:50,003 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2023-11-24 21:52:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:52:50,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 21:52:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:50,004 INFO L225 Difference]: With dead ends: 81 [2023-11-24 21:52:50,004 INFO L226 Difference]: Without dead ends: 81 [2023-11-24 21:52:50,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:52:50,005 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 57 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:50,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 125 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:52:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-24 21:52:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 67. [2023-11-24 21:52:50,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 43 states have (on average 1.697674418604651) internal successors, (73), 66 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 73 transitions. [2023-11-24 21:52:50,015 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 73 transitions. Word has length 12 [2023-11-24 21:52:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:50,016 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 73 transitions. [2023-11-24 21:52:50,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,016 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 73 transitions. [2023-11-24 21:52:50,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:52:50,017 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:50,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:50,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:52:50,018 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:50,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:50,019 INFO L85 PathProgramCache]: Analyzing trace with hash 97951334, now seen corresponding path program 1 times [2023-11-24 21:52:50,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:50,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136429697] [2023-11-24 21:52:50,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:50,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:50,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:50,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136429697] [2023-11-24 21:52:50,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136429697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:50,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:50,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:52:50,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358740048] [2023-11-24 21:52:50,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:50,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:52:50,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:50,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:52:50,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:52:50,091 INFO L87 Difference]: Start difference. First operand 67 states and 73 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:50,130 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2023-11-24 21:52:50,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:52:50,131 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-24 21:52:50,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:50,131 INFO L225 Difference]: With dead ends: 65 [2023-11-24 21:52:50,132 INFO L226 Difference]: Without dead ends: 65 [2023-11-24 21:52:50,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:52:50,133 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 51 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:50,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 108 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:52:50,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-24 21:52:50,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2023-11-24 21:52:50,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 62 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2023-11-24 21:52:50,138 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 13 [2023-11-24 21:52:50,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:50,138 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2023-11-24 21:52:50,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,139 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2023-11-24 21:52:50,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 21:52:50,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:50,140 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:50,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:52:50,140 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:50,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:50,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1291064318, now seen corresponding path program 1 times [2023-11-24 21:52:50,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:50,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878837429] [2023-11-24 21:52:50,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:50,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:50,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:50,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:50,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:50,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878837429] [2023-11-24 21:52:50,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878837429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:50,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:50,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:52:50,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912991180] [2023-11-24 21:52:50,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:50,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:52:50,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:50,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:52:50,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:52:50,494 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:50,692 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2023-11-24 21:52:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:52:50,692 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-24 21:52:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:50,693 INFO L225 Difference]: With dead ends: 64 [2023-11-24 21:52:50,693 INFO L226 Difference]: Without dead ends: 64 [2023-11-24 21:52:50,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:52:50,694 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 46 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:50,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 147 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:52:50,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-24 21:52:50,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2023-11-24 21:52:50,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.641025641025641) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2023-11-24 21:52:50,699 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 14 [2023-11-24 21:52:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:50,699 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2023-11-24 21:52:50,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,700 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2023-11-24 21:52:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 21:52:50,700 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:50,701 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:50,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:52:50,701 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:50,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:50,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1291064319, now seen corresponding path program 1 times [2023-11-24 21:52:50,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:50,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869083395] [2023-11-24 21:52:50,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:50,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:50,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:50,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869083395] [2023-11-24 21:52:50,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869083395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:50,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:50,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:52:50,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540350892] [2023-11-24 21:52:50,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:50,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:52:50,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:50,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:52:50,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:52:50,776 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:50,883 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2023-11-24 21:52:50,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:52:50,884 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-24 21:52:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:50,885 INFO L225 Difference]: With dead ends: 61 [2023-11-24 21:52:50,885 INFO L226 Difference]: Without dead ends: 61 [2023-11-24 21:52:50,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:52:50,886 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 13 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:50,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 112 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:52:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-24 21:52:50,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-24 21:52:50,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2023-11-24 21:52:50,891 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 14 [2023-11-24 21:52:50,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:50,891 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2023-11-24 21:52:50,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:50,892 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2023-11-24 21:52:50,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 21:52:50,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:50,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:50,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:52:50,893 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:50,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:50,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1368288191, now seen corresponding path program 1 times [2023-11-24 21:52:50,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:50,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738101853] [2023-11-24 21:52:50,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:50,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:51,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:51,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738101853] [2023-11-24 21:52:51,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738101853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:51,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:51,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:52:51,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042955231] [2023-11-24 21:52:51,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:51,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:52:51,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:51,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:52:51,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:52:51,236 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:51,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:51,484 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2023-11-24 21:52:51,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:52:51,485 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-24 21:52:51,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:51,486 INFO L225 Difference]: With dead ends: 98 [2023-11-24 21:52:51,486 INFO L226 Difference]: Without dead ends: 98 [2023-11-24 21:52:51,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:52:51,487 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 52 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:51,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 172 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:52:51,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-24 21:52:51,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2023-11-24 21:52:51,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.5208333333333333) internal successors, (73), 69 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:51,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2023-11-24 21:52:51,491 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 15 [2023-11-24 21:52:51,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:51,491 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2023-11-24 21:52:51,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:51,491 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2023-11-24 21:52:51,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:52:51,492 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:51,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:51,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-24 21:52:51,493 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:51,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:51,493 INFO L85 PathProgramCache]: Analyzing trace with hash 532739137, now seen corresponding path program 1 times [2023-11-24 21:52:51,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:51,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137205414] [2023-11-24 21:52:51,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:51,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:51,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:51,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137205414] [2023-11-24 21:52:51,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137205414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:51,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:51,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:52:51,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19531815] [2023-11-24 21:52:51,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:51,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:52:51,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:51,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:52:51,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:52:51,856 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:52,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:52,221 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2023-11-24 21:52:52,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:52:52,222 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-24 21:52:52,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:52,223 INFO L225 Difference]: With dead ends: 97 [2023-11-24 21:52:52,223 INFO L226 Difference]: Without dead ends: 97 [2023-11-24 21:52:52,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:52:52,224 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 46 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:52,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 173 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:52:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-24 21:52:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2023-11-24 21:52:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.510204081632653) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2023-11-24 21:52:52,228 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 16 [2023-11-24 21:52:52,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:52,228 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2023-11-24 21:52:52,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:52,228 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2023-11-24 21:52:52,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:52:52,229 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:52,229 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:52,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:52:52,230 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:52,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:52,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1448475207, now seen corresponding path program 1 times [2023-11-24 21:52:52,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:52,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952144815] [2023-11-24 21:52:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:52,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:52,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:52,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952144815] [2023-11-24 21:52:52,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952144815] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:52:52,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478552540] [2023-11-24 21:52:52,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:52,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:52:52,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:52:52,562 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:52:52,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:52:52,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:52,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-24 21:52:52,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:52:52,870 INFO L378 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 15 treesize of output 1 [2023-11-24 21:52:52,928 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-24 21:52:52,928 INFO L378 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 23 treesize of output 24 [2023-11-24 21:52:52,962 INFO L378 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 [2023-11-24 21:52:52,995 INFO L378 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 15 treesize of output 1 [2023-11-24 21:52:53,032 INFO L378 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 [2023-11-24 21:52:53,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:53,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:52:53,149 INFO L378 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 38 treesize of output 34 [2023-11-24 21:52:53,581 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:52:53,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 135 treesize of output 339 [2023-11-24 21:52:54,274 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:54,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478552540] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:52:54,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:52:54,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-24 21:52:54,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264142417] [2023-11-24 21:52:54,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:52:54,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 21:52:54,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:54,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 21:52:54,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:52:54,277 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:54,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:54,734 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2023-11-24 21:52:54,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:52:54,735 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-24 21:52:54,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:54,735 INFO L225 Difference]: With dead ends: 72 [2023-11-24 21:52:54,736 INFO L226 Difference]: Without dead ends: 72 [2023-11-24 21:52:54,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=427, Unknown=0, NotChecked=0, Total=552 [2023-11-24 21:52:54,737 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 119 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:54,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 204 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:52:54,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-11-24 21:52:54,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-11-24 21:52:54,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 49 states have (on average 1.489795918367347) internal successors, (73), 69 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:54,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2023-11-24 21:52:54,740 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 16 [2023-11-24 21:52:54,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:54,741 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2023-11-24 21:52:54,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:54,741 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2023-11-24 21:52:54,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 21:52:54,742 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:54,742 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:54,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:52:54,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 21:52:54,949 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:54,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:54,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1448475208, now seen corresponding path program 1 times [2023-11-24 21:52:54,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:54,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383183340] [2023-11-24 21:52:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:54,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:55,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:55,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383183340] [2023-11-24 21:52:55,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383183340] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:52:55,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062488161] [2023-11-24 21:52:55,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:55,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:52:55,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:52:55,492 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:52:55,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:52:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:55,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-24 21:52:55,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:52:55,799 INFO L378 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 15 treesize of output 1 [2023-11-24 21:52:55,803 INFO L378 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 11 treesize of output 7 [2023-11-24 21:52:55,871 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-24 21:52:55,871 INFO L378 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 18 treesize of output 21 [2023-11-24 21:52:55,891 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-24 21:52:55,891 INFO L378 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 15 treesize of output 15 [2023-11-24 21:52:55,934 INFO L378 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 [2023-11-24 21:52:55,970 INFO L378 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 15 treesize of output 1 [2023-11-24 21:52:55,974 INFO L378 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 11 treesize of output 7 [2023-11-24 21:52:56,030 INFO L378 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 [2023-11-24 21:52:56,038 INFO L378 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 7 treesize of output 3 [2023-11-24 21:52:56,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:56,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:52:56,291 INFO L378 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 32 treesize of output 28 [2023-11-24 21:52:56,313 INFO L378 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 66 treesize of output 62 [2023-11-24 21:52:56,318 INFO L378 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 102 treesize of output 94 [2023-11-24 21:52:56,533 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:52:56,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 134 [2023-11-24 21:52:56,558 INFO L378 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 68 treesize of output 64 [2023-11-24 21:52:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:56,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062488161] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:52:56,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:52:56,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-11-24 21:52:56,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835887839] [2023-11-24 21:52:56,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:52:56,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-24 21:52:56,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:56,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-24 21:52:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2023-11-24 21:52:56,731 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:57,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:57,386 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2023-11-24 21:52:57,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:52:57,387 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-24 21:52:57,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:57,388 INFO L225 Difference]: With dead ends: 71 [2023-11-24 21:52:57,388 INFO L226 Difference]: Without dead ends: 71 [2023-11-24 21:52:57,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2023-11-24 21:52:57,389 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 78 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:57,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 317 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:52:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-24 21:52:57,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2023-11-24 21:52:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 49 states have (on average 1.469387755102041) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:57,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2023-11-24 21:52:57,393 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 16 [2023-11-24 21:52:57,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:57,393 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2023-11-24 21:52:57,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.090909090909091) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:57,394 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2023-11-24 21:52:57,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 21:52:57,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:57,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:57,406 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:52:57,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 21:52:57,601 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:57,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:57,601 INFO L85 PathProgramCache]: Analyzing trace with hash -664955837, now seen corresponding path program 1 times [2023-11-24 21:52:57,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:57,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097621696] [2023-11-24 21:52:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:57,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:58,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:58,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:58,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097621696] [2023-11-24 21:52:58,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097621696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:58,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:58,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:52:58,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044766956] [2023-11-24 21:52:58,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:58,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:52:58,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:58,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:52:58,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:52:58,106 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:58,393 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2023-11-24 21:52:58,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:52:58,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-24 21:52:58,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:58,394 INFO L225 Difference]: With dead ends: 80 [2023-11-24 21:52:58,394 INFO L226 Difference]: Without dead ends: 80 [2023-11-24 21:52:58,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:52:58,395 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 21 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:58,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 130 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:52:58,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-24 21:52:58,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2023-11-24 21:52:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.46) internal successors, (73), 69 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2023-11-24 21:52:58,398 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 17 [2023-11-24 21:52:58,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:58,398 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2023-11-24 21:52:58,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2023-11-24 21:52:58,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:52:58,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:58,399 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:58,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:52:58,400 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:58,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:58,400 INFO L85 PathProgramCache]: Analyzing trace with hash 861205636, now seen corresponding path program 1 times [2023-11-24 21:52:58,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:58,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800868352] [2023-11-24 21:52:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:58,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:58,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:58,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:58,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800868352] [2023-11-24 21:52:58,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800868352] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:58,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:58,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:52:58,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550665905] [2023-11-24 21:52:58,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:58,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:52:58,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:58,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:52:58,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:52:58,595 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:58,743 INFO L93 Difference]: Finished difference Result 69 states and 72 transitions. [2023-11-24 21:52:58,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:52:58,743 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 21:52:58,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:58,744 INFO L225 Difference]: With dead ends: 69 [2023-11-24 21:52:58,744 INFO L226 Difference]: Without dead ends: 69 [2023-11-24 21:52:58,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:52:58,745 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 143 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:58,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 40 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:52:58,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-24 21:52:58,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-11-24 21:52:58,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.44) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2023-11-24 21:52:58,750 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 18 [2023-11-24 21:52:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:58,750 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2023-11-24 21:52:58,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2023-11-24 21:52:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:52:58,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:58,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:58,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:52:58,752 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:58,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:58,752 INFO L85 PathProgramCache]: Analyzing trace with hash 861205637, now seen corresponding path program 1 times [2023-11-24 21:52:58,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:58,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909573612] [2023-11-24 21:52:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:58,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:58,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:58,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:58,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:58,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909573612] [2023-11-24 21:52:58,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909573612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:58,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:58,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:52:58,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032849869] [2023-11-24 21:52:58,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:58,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:52:58,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:58,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:52:58,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:52:58,840 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:58,887 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2023-11-24 21:52:58,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:52:58,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 21:52:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:58,888 INFO L225 Difference]: With dead ends: 64 [2023-11-24 21:52:58,888 INFO L226 Difference]: Without dead ends: 64 [2023-11-24 21:52:58,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:52:58,890 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 38 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:58,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:52:58,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-24 21:52:58,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-24 21:52:58,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.34) internal successors, (67), 63 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2023-11-24 21:52:58,894 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 18 [2023-11-24 21:52:58,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:58,894 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2023-11-24 21:52:58,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:58,894 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2023-11-24 21:52:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 21:52:58,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:58,897 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:58,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:52:58,899 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:58,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:58,900 INFO L85 PathProgramCache]: Analyzing trace with hash 927570983, now seen corresponding path program 1 times [2023-11-24 21:52:58,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:58,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194950323] [2023-11-24 21:52:58,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:58,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:59,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:59,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194950323] [2023-11-24 21:52:59,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194950323] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:59,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:59,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:52:59,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386839109] [2023-11-24 21:52:59,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:59,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:52:59,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:59,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:52:59,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:52:59,046 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:59,119 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2023-11-24 21:52:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:52:59,120 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-24 21:52:59,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:59,121 INFO L225 Difference]: With dead ends: 63 [2023-11-24 21:52:59,121 INFO L226 Difference]: Without dead ends: 63 [2023-11-24 21:52:59,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:52:59,122 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 27 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:59,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 94 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:52:59,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-24 21:52:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-11-24 21:52:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 50 states have (on average 1.32) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2023-11-24 21:52:59,126 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 19 [2023-11-24 21:52:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:59,126 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2023-11-24 21:52:59,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,127 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2023-11-24 21:52:59,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 21:52:59,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:59,129 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:59,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:52:59,129 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:59,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:59,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1310070492, now seen corresponding path program 1 times [2023-11-24 21:52:59,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:59,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524279456] [2023-11-24 21:52:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:59,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:52:59,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:59,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524279456] [2023-11-24 21:52:59,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524279456] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:52:59,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:52:59,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:52:59,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757456832] [2023-11-24 21:52:59,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:52:59,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:52:59,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:59,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:52:59,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:52:59,311 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:59,412 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2023-11-24 21:52:59,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:52:59,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-24 21:52:59,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:59,413 INFO L225 Difference]: With dead ends: 62 [2023-11-24 21:52:59,413 INFO L226 Difference]: Without dead ends: 62 [2023-11-24 21:52:59,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:52:59,414 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:59,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 74 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:52:59,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-24 21:52:59,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-24 21:52:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 50 states have (on average 1.3) internal successors, (65), 61 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2023-11-24 21:52:59,416 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 20 [2023-11-24 21:52:59,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:59,417 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2023-11-24 21:52:59,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:52:59,417 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2023-11-24 21:52:59,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 21:52:59,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:59,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:52:59,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 21:52:59,418 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:52:59,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:59,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1957479479, now seen corresponding path program 1 times [2023-11-24 21:52:59,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:59,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553895144] [2023-11-24 21:52:59,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:59,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:00,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:00,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:00,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553895144] [2023-11-24 21:53:00,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553895144] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:00,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:00,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:53:00,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729034341] [2023-11-24 21:53:00,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:00,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:53:00,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:00,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:53:00,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:53:00,050 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:53:00,511 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2023-11-24 21:53:00,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 21:53:00,512 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-24 21:53:00,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:53:00,513 INFO L225 Difference]: With dead ends: 78 [2023-11-24 21:53:00,513 INFO L226 Difference]: Without dead ends: 78 [2023-11-24 21:53:00,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:53:00,514 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:53:00,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 130 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:53:00,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-24 21:53:00,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2023-11-24 21:53:00,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2023-11-24 21:53:00,517 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 21 [2023-11-24 21:53:00,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:53:00,517 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2023-11-24 21:53:00,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.1) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,517 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2023-11-24 21:53:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 21:53:00,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:53:00,518 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:00,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-24 21:53:00,519 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:53:00,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:00,519 INFO L85 PathProgramCache]: Analyzing trace with hash -552321593, now seen corresponding path program 1 times [2023-11-24 21:53:00,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:00,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719921389] [2023-11-24 21:53:00,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:00,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:00,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:00,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:00,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719921389] [2023-11-24 21:53:00,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719921389] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:00,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:00,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:53:00,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079494365] [2023-11-24 21:53:00,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:00,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:53:00,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:53:00,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:53:00,731 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:53:00,854 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2023-11-24 21:53:00,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:53:00,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-24 21:53:00,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:53:00,856 INFO L225 Difference]: With dead ends: 65 [2023-11-24 21:53:00,856 INFO L226 Difference]: Without dead ends: 65 [2023-11-24 21:53:00,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:53:00,857 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:53:00,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 57 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:53:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-24 21:53:00,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-24 21:53:00,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2023-11-24 21:53:00,861 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 22 [2023-11-24 21:53:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:53:00,862 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2023-11-24 21:53:00,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:00,862 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2023-11-24 21:53:00,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:53:00,863 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:53:00,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:00,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-24 21:53:00,864 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:53:00,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:00,864 INFO L85 PathProgramCache]: Analyzing trace with hash -191373720, now seen corresponding path program 1 times [2023-11-24 21:53:00,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:00,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581210558] [2023-11-24 21:53:00,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:00,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:02,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:02,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581210558] [2023-11-24 21:53:02,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581210558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:02,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:02,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-24 21:53:02,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493012524] [2023-11-24 21:53:02,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:02,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-24 21:53:02,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:02,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-24 21:53:02,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2023-11-24 21:53:02,300 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:02,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:53:02,920 INFO L93 Difference]: Finished difference Result 96 states and 100 transitions. [2023-11-24 21:53:02,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:53:02,924 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-24 21:53:02,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:53:02,924 INFO L225 Difference]: With dead ends: 96 [2023-11-24 21:53:02,924 INFO L226 Difference]: Without dead ends: 94 [2023-11-24 21:53:02,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:53:02,925 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:53:02,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 188 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:53:02,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-24 21:53:02,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2023-11-24 21:53:02,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 81 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:02,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2023-11-24 21:53:02,928 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 25 [2023-11-24 21:53:02,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:53:02,929 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2023-11-24 21:53:02,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2023-11-24 21:53:02,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:53:02,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:53:02,930 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:02,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-24 21:53:02,930 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:53:02,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:02,930 INFO L85 PathProgramCache]: Analyzing trace with hash -191372532, now seen corresponding path program 1 times [2023-11-24 21:53:02,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:02,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649720343] [2023-11-24 21:53:02,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:02,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:02,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:03,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:03,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:03,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649720343] [2023-11-24 21:53:03,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649720343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:53:03,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:53:03,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:53:03,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348103699] [2023-11-24 21:53:03,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:53:03,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:53:03,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:53:03,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:53:03,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:53:03,008 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:53:03,058 INFO L93 Difference]: Finished difference Result 93 states and 97 transitions. [2023-11-24 21:53:03,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:53:03,058 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-24 21:53:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:53:03,059 INFO L225 Difference]: With dead ends: 93 [2023-11-24 21:53:03,059 INFO L226 Difference]: Without dead ends: 79 [2023-11-24 21:53:03,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:53:03,061 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:53:03,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 123 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:53:03,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-24 21:53:03,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2023-11-24 21:53:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.2456140350877194) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:03,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2023-11-24 21:53:03,064 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 25 [2023-11-24 21:53:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:53:03,064 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2023-11-24 21:53:03,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:53:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2023-11-24 21:53:03,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:53:03,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:53:03,065 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:53:03,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-24 21:53:03,066 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2023-11-24 21:53:03,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:53:03,066 INFO L85 PathProgramCache]: Analyzing trace with hash -211721831, now seen corresponding path program 1 times [2023-11-24 21:53:03,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:53:03,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12136007] [2023-11-24 21:53:03,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:03,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:53:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:53:04,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:53:04,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12136007] [2023-11-24 21:53:04,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12136007] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:53:04,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514835937] [2023-11-24 21:53:04,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:53:04,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:53:04,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:53:04,114 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:53:04,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_43b39866-a327-4f20-a15b-4e40c13f940e/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:53:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:53:04,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-24 21:53:04,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:53:04,412 INFO L378 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 11 treesize of output 7 [2023-11-24 21:53:04,468 INFO L378 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 11 treesize of output 7 [2023-11-24 21:53:04,475 INFO L378 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 15 treesize of output 1 [2023-11-24 21:53:04,561 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-24 21:53:04,561 INFO L378 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 15 treesize of output 15 [2023-11-24 21:53:04,699 INFO L378 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 15 treesize of output 11 [2023-11-24 21:53:04,712 INFO L378 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 26 [2023-11-24 21:53:04,873 INFO L378 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 19 treesize of output 11 [2023-11-24 21:53:05,049 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:53:05,056 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 21:53:05,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 54 [2023-11-24 21:53:05,163 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 16 [2023-11-24 21:53:05,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-24 21:53:05,318 INFO L378 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 48 treesize of output 32 [2023-11-24 21:53:05,323 INFO L378 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 32 treesize of output 20 [2023-11-24 21:53:05,400 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:53:05,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:53:07,243 INFO L378 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 84 treesize of output 76 [2023-11-24 21:53:07,248 INFO L378 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 130 treesize of output 122 [2023-11-24 21:53:08,404 INFO L349 Elim1Store]: treesize reduction 66, result has 77.3 percent of original size [2023-11-24 21:53:08,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 983 treesize of output 1142 [2023-11-24 21:53:08,869 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:53:08,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 731 treesize of output 885