./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme --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 d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 11:44:51,235 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 11:44:51,338 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-26 11:44:51,343 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 11:44:51,344 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 11:44:51,385 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 11:44:51,386 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 11:44:51,386 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 11:44:51,387 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 11:44:51,388 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 11:44:51,388 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 11:44:51,389 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 11:44:51,390 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 11:44:51,390 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 11:44:51,391 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 11:44:51,391 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 11:44:51,392 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 11:44:51,392 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 11:44:51,393 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 11:44:51,393 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 11:44:51,394 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 11:44:51,394 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 11:44:51,395 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 11:44:51,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 11:44:51,395 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 11:44:51,409 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 11:44:51,410 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 11:44:51,410 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 11:44:51,410 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 11:44:51,411 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 11:44:51,412 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 11:44:51,413 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 11:44:51,413 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:44:51,413 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 11:44:51,414 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 11:44:51,414 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 11:44:51,414 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 11:44:51,414 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 11:44:51,415 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 11:44:51,415 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 11:44:51,415 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 11:44:51,415 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_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 [2023-11-26 11:44:51,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 11:44:51,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 11:44:51,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 11:44:51,803 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 11:44:51,804 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 11:44:51,805 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2023-11-26 11:44:54,871 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 11:44:55,245 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 11:44:55,246 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2023-11-26 11:44:55,262 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/data/2bcc3dd95/3d63b04057d9481bac9bf6d3440b6bab/FLAGba374f3d9 [2023-11-26 11:44:55,278 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/data/2bcc3dd95/3d63b04057d9481bac9bf6d3440b6bab [2023-11-26 11:44:55,281 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 11:44:55,282 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 11:44:55,284 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 11:44:55,284 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 11:44:55,289 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 11:44:55,290 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:44:55" (1/1) ... [2023-11-26 11:44:55,291 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@168771ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:55, skipping insertion in model container [2023-11-26 11:44:55,292 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 11:44:55" (1/1) ... [2023-11-26 11:44:55,332 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 11:44:55,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:44:55,724 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 11:44:55,784 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 11:44:55,823 INFO L206 MainTranslator]: Completed translation [2023-11-26 11:44:55,823 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:55 WrapperNode [2023-11-26 11:44:55,824 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 11:44:55,825 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 11:44:55,825 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 11:44:55,825 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 11:44:55,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:55" (1/1) ... [2023-11-26 11:44:55,850 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:55" (1/1) ... [2023-11-26 11:44:55,895 INFO L138 Inliner]: procedures = 127, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 170 [2023-11-26 11:44:55,897 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 11:44:55,898 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 11:44:55,899 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 11:44:55,899 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 11:44:55,911 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:55" (1/1) ... [2023-11-26 11:44:55,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:55" (1/1) ... [2023-11-26 11:44:55,934 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:55" (1/1) ... [2023-11-26 11:44:55,974 INFO L175 MemorySlicer]: Split 28 memory accesses to 3 slices as follows [2, 16, 10]. 57 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 8 writes are split as follows [0, 7, 1]. [2023-11-26 11:44:55,975 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:55" (1/1) ... [2023-11-26 11:44:55,975 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:55" (1/1) ... [2023-11-26 11:44:55,987 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:55" (1/1) ... [2023-11-26 11:44:55,991 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:55" (1/1) ... [2023-11-26 11:44:55,993 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:55" (1/1) ... [2023-11-26 11:44:55,996 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:55" (1/1) ... [2023-11-26 11:44:56,004 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 11:44:56,006 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 11:44:56,006 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 11:44:56,006 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 11:44:56,007 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:55" (1/1) ... [2023-11-26 11:44:56,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 11:44:56,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:44:56,043 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 11:44:56,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 11:44:56,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 11:44:56,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-26 11:44:56,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-26 11:44:56,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 11:44:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-26 11:44:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-26 11:44:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-26 11:44:56,093 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-26 11:44:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-26 11:44:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 11:44:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 11:44:56,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-26 11:44:56,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-26 11:44:56,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-26 11:44:56,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-26 11:44:56,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-26 11:44:56,094 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-26 11:44:56,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 11:44:56,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-26 11:44:56,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-26 11:44:56,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-26 11:44:56,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 11:44:56,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-26 11:44:56,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-26 11:44:56,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 11:44:56,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 11:44:56,241 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 11:44:56,243 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 11:44:56,750 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 11:44:56,800 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 11:44:56,801 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-26 11:44:56,801 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:44:56 BoogieIcfgContainer [2023-11-26 11:44:56,801 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 11:44:56,827 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 11:44:56,827 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 11:44:56,830 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 11:44:56,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 11:44:55" (1/3) ... [2023-11-26 11:44:56,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d5844e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:44:56, skipping insertion in model container [2023-11-26 11:44:56,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 11:44:55" (2/3) ... [2023-11-26 11:44:56,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56d5844e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 11:44:56, skipping insertion in model container [2023-11-26 11:44:56,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 11:44:56" (3/3) ... [2023-11-26 11:44:56,833 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_append_unequal.i [2023-11-26 11:44:56,869 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 11:44:56,869 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 58 error locations. [2023-11-26 11:44:56,932 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 11:44:56,938 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;@c3eac6f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 11:44:56,938 INFO L358 AbstractCegarLoop]: Starting to check reachability of 58 error locations. [2023-11-26 11:44:56,943 INFO L276 IsEmpty]: Start isEmpty. Operand has 118 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 113 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:44:56,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-26 11:44:56,949 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:56,949 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:44:56,950 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:44:56,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:56,956 INFO L85 PathProgramCache]: Analyzing trace with hash 256229600, now seen corresponding path program 1 times [2023-11-26 11:44:56,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:56,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385533911] [2023-11-26 11:44:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:56,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:57,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:57,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385533911] [2023-11-26 11:44:57,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385533911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:57,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:57,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:57,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045440636] [2023-11-26 11:44:57,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:57,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:44:57,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:57,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:44:57,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:57,273 INFO L87 Difference]: Start difference. First operand has 118 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 113 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:57,419 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2023-11-26 11:44:57,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:57,421 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-26 11:44:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:57,431 INFO L225 Difference]: With dead ends: 115 [2023-11-26 11:44:57,431 INFO L226 Difference]: Without dead ends: 113 [2023-11-26 11:44:57,433 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 [2023-11-26 11:44:57,437 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:57,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 167 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:44:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-11-26 11:44:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-11-26 11:44:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 53 states have (on average 2.207547169811321) internal successors, (117), 108 states have internal predecessors, (117), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:44:57,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2023-11-26 11:44:57,487 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 5 [2023-11-26 11:44:57,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:57,488 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2023-11-26 11:44:57,489 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:57,489 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2023-11-26 11:44:57,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-26 11:44:57,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:57,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 11:44:57,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 11:44:57,492 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:44:57,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash 256229601, now seen corresponding path program 1 times [2023-11-26 11:44:57,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:57,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345104600] [2023-11-26 11:44:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:57,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:57,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:57,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:57,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345104600] [2023-11-26 11:44:57,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345104600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:57,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:57,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 11:44:57,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538357554] [2023-11-26 11:44:57,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:57,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 11:44:57,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:57,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 11:44:57,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 11:44:57,630 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:57,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:57,784 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2023-11-26 11:44:57,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 11:44:57,785 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-26 11:44:57,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:57,789 INFO L225 Difference]: With dead ends: 111 [2023-11-26 11:44:57,790 INFO L226 Difference]: Without dead ends: 111 [2023-11-26 11:44:57,794 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 [2023-11-26 11:44:57,796 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 2 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:57,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 172 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 11:44:57,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-26 11:44:57,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-11-26 11:44:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 53 states have (on average 2.169811320754717) internal successors, (115), 106 states have internal predecessors, (115), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:44:57,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2023-11-26 11:44:57,825 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 5 [2023-11-26 11:44:57,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:57,826 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2023-11-26 11:44:57,826 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-26 11:44:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2023-11-26 11:44:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 11:44:57,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:57,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:57,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 11:44:57,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:44:57,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:57,830 INFO L85 PathProgramCache]: Analyzing trace with hash -523509657, now seen corresponding path program 1 times [2023-11-26 11:44:57,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:57,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739787698] [2023-11-26 11:44:57,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:57,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:58,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:44:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 11:44:58,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:58,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739787698] [2023-11-26 11:44:58,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739787698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:58,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:58,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 11:44:58,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048523410] [2023-11-26 11:44:58,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:58,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 11:44:58,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:58,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 11:44:58,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:58,062 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:44:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:58,268 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2023-11-26 11:44:58,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 11:44:58,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-26 11:44:58,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:58,273 INFO L225 Difference]: With dead ends: 112 [2023-11-26 11:44:58,273 INFO L226 Difference]: Without dead ends: 112 [2023-11-26 11:44:58,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 11:44:58,277 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 4 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:58,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 241 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:44:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-26 11:44:58,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-11-26 11:44:58,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 54 states have (on average 2.1481481481481484) internal successors, (116), 107 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:44:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2023-11-26 11:44:58,300 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 10 [2023-11-26 11:44:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:58,302 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2023-11-26 11:44:58,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 11:44:58,302 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2023-11-26 11:44:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 11:44:58,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:58,304 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:58,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 11:44:58,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:44:58,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:58,306 INFO L85 PathProgramCache]: Analyzing trace with hash -439189455, now seen corresponding path program 1 times [2023-11-26 11:44:58,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:58,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759613414] [2023-11-26 11:44:58,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:58,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:58,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:44:58,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:58,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:44:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:58,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:44:58,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:58,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759613414] [2023-11-26 11:44:58,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759613414] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:58,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:58,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:44:58,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750836195] [2023-11-26 11:44:58,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:58,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:44:58,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:58,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:44:58,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:44:58,602 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:44:58,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:58,937 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2023-11-26 11:44:58,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:44:58,938 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-26 11:44:58,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:58,940 INFO L225 Difference]: With dead ends: 111 [2023-11-26 11:44:58,940 INFO L226 Difference]: Without dead ends: 111 [2023-11-26 11:44:58,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:58,942 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 3 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:58,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 371 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:44:58,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-26 11:44:58,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2023-11-26 11:44:58,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 54 states have (on average 2.1296296296296298) internal successors, (115), 106 states have internal predecessors, (115), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:44:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2023-11-26 11:44:58,951 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 17 [2023-11-26 11:44:58,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:58,951 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2023-11-26 11:44:58,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:44:58,952 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2023-11-26 11:44:58,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-26 11:44:58,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:58,953 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:58,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 11:44:58,953 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:44:58,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash -439189454, now seen corresponding path program 1 times [2023-11-26 11:44:58,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:58,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138890698] [2023-11-26 11:44:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:59,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:44:59,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:59,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:44:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:44:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:44:59,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:44:59,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138890698] [2023-11-26 11:44:59,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138890698] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:44:59,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:44:59,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:44:59,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354934035] [2023-11-26 11:44:59,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:44:59,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:44:59,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:44:59,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:44:59,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:44:59,391 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:44:59,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:44:59,764 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2023-11-26 11:44:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:44:59,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-26 11:44:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:44:59,766 INFO L225 Difference]: With dead ends: 110 [2023-11-26 11:44:59,766 INFO L226 Difference]: Without dead ends: 110 [2023-11-26 11:44:59,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:44:59,768 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 1 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:44:59,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 395 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:44:59,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-26 11:44:59,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2023-11-26 11:44:59,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 54 states have (on average 2.111111111111111) internal successors, (114), 105 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:44:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2023-11-26 11:44:59,779 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 17 [2023-11-26 11:44:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:44:59,780 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2023-11-26 11:44:59,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-26 11:44:59,780 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2023-11-26 11:44:59,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 11:44:59,781 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:44:59,781 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:44:59,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 11:44:59,782 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:44:59,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:44:59,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1154053696, now seen corresponding path program 1 times [2023-11-26 11:44:59,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:44:59,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644949875] [2023-11-26 11:44:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:44:59,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:44:59,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:00,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:45:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:00,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:45:00,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-26 11:45:00,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:00,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644949875] [2023-11-26 11:45:00,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644949875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:00,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489498520] [2023-11-26 11:45:00,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:00,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:00,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:00,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:00,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 11:45:00,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:00,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:45:00,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:00,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 11:45:00,585 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-26 11:45:00,667 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-26 11:45:00,668 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 19 treesize of output 16 [2023-11-26 11:45:00,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-11-26 11:45:00,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:00,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489498520] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:00,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:00,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2023-11-26 11:45:00,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838013501] [2023-11-26 11:45:00,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:00,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 11:45:00,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:00,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 11:45:00,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-11-26 11:45:00,802 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 11 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:45:01,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:01,206 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2023-11-26 11:45:01,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:45:01,207 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-11-26 11:45:01,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:01,208 INFO L225 Difference]: With dead ends: 109 [2023-11-26 11:45:01,208 INFO L226 Difference]: Without dead ends: 109 [2023-11-26 11:45:01,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-11-26 11:45:01,210 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 3 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:01,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 433 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 373 Invalid, 0 Unknown, 114 Unchecked, 0.3s Time] [2023-11-26 11:45:01,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-26 11:45:01,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-11-26 11:45:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 54 states have (on average 2.0925925925925926) internal successors, (113), 104 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:45:01,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2023-11-26 11:45:01,217 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 19 [2023-11-26 11:45:01,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:01,218 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2023-11-26 11:45:01,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:45:01,218 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2023-11-26 11:45:01,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-26 11:45:01,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:01,219 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:01,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:01,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-26 11:45:01,420 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:45:01,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:01,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1154053695, now seen corresponding path program 1 times [2023-11-26 11:45:01,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:01,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290356171] [2023-11-26 11:45:01,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:01,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:01,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:45:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:01,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:45:01,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:02,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:02,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290356171] [2023-11-26 11:45:02,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290356171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:02,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32753721] [2023-11-26 11:45:02,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:02,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:02,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:02,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:02,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 11:45:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:02,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-26 11:45:02,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:02,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 11:45:02,451 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-26 11:45:02,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:45:02,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-26 11:45:02,522 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:45:02,523 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 11 treesize of output 11 [2023-11-26 11:45:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-11-26 11:45:02,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:02,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32753721] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:02,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:02,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2023-11-26 11:45:02,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211095931] [2023-11-26 11:45:02,756 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:02,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:45:02,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:02,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:45:02,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=289, Unknown=1, NotChecked=34, Total=380 [2023-11-26 11:45:02,759 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:45:03,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:03,559 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2023-11-26 11:45:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 11:45:03,560 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2023-11-26 11:45:03,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:03,563 INFO L225 Difference]: With dead ends: 109 [2023-11-26 11:45:03,563 INFO L226 Difference]: Without dead ends: 109 [2023-11-26 11:45:03,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=350, Unknown=1, NotChecked=38, Total=462 [2023-11-26 11:45:03,565 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 6 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:03,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 614 Invalid, 880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 757 Invalid, 0 Unknown, 116 Unchecked, 0.6s Time] [2023-11-26 11:45:03,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-26 11:45:03,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2023-11-26 11:45:03,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 54 states have (on average 2.074074074074074) internal successors, (112), 103 states have internal predecessors, (112), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:45:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2023-11-26 11:45:03,573 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 19 [2023-11-26 11:45:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:03,573 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2023-11-26 11:45:03,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-26 11:45:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2023-11-26 11:45:03,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 11:45:03,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:03,575 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:03,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:03,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-26 11:45:03,783 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:45:03,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:03,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2095856878, now seen corresponding path program 1 times [2023-11-26 11:45:03,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:03,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658317146] [2023-11-26 11:45:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:03,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:03,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:04,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:45:04,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:04,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:45:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:04,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:45:04,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:04,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:45:04,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:04,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658317146] [2023-11-26 11:45:04,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658317146] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:04,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968653787] [2023-11-26 11:45:04,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:04,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:04,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:04,450 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:04,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 11:45:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:04,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-26 11:45:04,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:04,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 11:45:04,662 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 5 treesize of output 3 [2023-11-26 11:45:04,694 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2023-11-26 11:45:04,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:45:04,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:45:04,761 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 5 treesize of output 3 [2023-11-26 11:45:04,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:45:04,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:45:04,832 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-11-26 11:45:04,852 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-26 11:45:04,852 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 12 treesize of output 14 [2023-11-26 11:45:04,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 8 not checked. [2023-11-26 11:45:04,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:05,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968653787] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:05,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:05,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-11-26 11:45:05,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462793440] [2023-11-26 11:45:05,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:05,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-26 11:45:05,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:05,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-26 11:45:05,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=121, Unknown=2, NotChecked=46, Total=210 [2023-11-26 11:45:05,052 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand has 13 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 11:45:05,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:05,447 INFO L93 Difference]: Finished difference Result 116 states and 127 transitions. [2023-11-26 11:45:05,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:45:05,448 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 27 [2023-11-26 11:45:05,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:05,449 INFO L225 Difference]: With dead ends: 116 [2023-11-26 11:45:05,449 INFO L226 Difference]: Without dead ends: 116 [2023-11-26 11:45:05,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=162, Unknown=2, NotChecked=54, Total=272 [2023-11-26 11:45:05,450 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 122 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:05,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 226 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 323 Invalid, 0 Unknown, 244 Unchecked, 0.3s Time] [2023-11-26 11:45:05,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-26 11:45:05,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2023-11-26 11:45:05,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 94 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:45:05,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2023-11-26 11:45:05,455 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 27 [2023-11-26 11:45:05,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:05,456 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2023-11-26 11:45:05,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-26 11:45:05,456 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2023-11-26 11:45:05,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-26 11:45:05,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:05,457 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:05,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:05,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:05,658 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:45:05,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:05,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2095856877, now seen corresponding path program 1 times [2023-11-26 11:45:05,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:05,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491111212] [2023-11-26 11:45:05,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:05,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:05,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:06,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:45:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:06,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:45:06,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:06,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:45:06,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:45:06,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:06,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491111212] [2023-11-26 11:45:06,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491111212] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:06,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238257175] [2023-11-26 11:45:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:06,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:06,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:06,530 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:06,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 11:45:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:06,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-26 11:45:06,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:06,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:45:06,775 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 5 treesize of output 3 [2023-11-26 11:45:06,799 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2023-11-26 11:45:06,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:45:06,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:45:06,867 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 5 treesize of output 3 [2023-11-26 11:45:06,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:45:06,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:45:07,006 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 5 treesize of output 3 [2023-11-26 11:45:07,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:45:07,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:45:07,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 11:45:07,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:07,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238257175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:07,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:45:07,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 15 [2023-11-26 11:45:07,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133576215] [2023-11-26 11:45:07,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:07,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:45:07,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:07,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:45:07,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=196, Unknown=1, NotChecked=28, Total=272 [2023-11-26 11:45:07,081 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:45:07,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:07,263 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2023-11-26 11:45:07,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:45:07,264 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-11-26 11:45:07,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:07,265 INFO L225 Difference]: With dead ends: 94 [2023-11-26 11:45:07,265 INFO L226 Difference]: Without dead ends: 94 [2023-11-26 11:45:07,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=223, Unknown=1, NotChecked=30, Total=306 [2023-11-26 11:45:07,266 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 25 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:07,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 221 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 157 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2023-11-26 11:45:07,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-26 11:45:07,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-26 11:45:07,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 89 states have internal predecessors, (98), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:45:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2023-11-26 11:45:07,271 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 27 [2023-11-26 11:45:07,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:07,271 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2023-11-26 11:45:07,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:45:07,272 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2023-11-26 11:45:07,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 11:45:07,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:07,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:07,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-26 11:45:07,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:07,479 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:45:07,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:07,480 INFO L85 PathProgramCache]: Analyzing trace with hash 221202259, now seen corresponding path program 1 times [2023-11-26 11:45:07,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:07,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994358175] [2023-11-26 11:45:07,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:07,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:07,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:07,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:45:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:07,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:45:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:07,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:45:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:07,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:45:07,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:07,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994358175] [2023-11-26 11:45:07,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994358175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:07,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:07,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-26 11:45:07,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378517015] [2023-11-26 11:45:07,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:07,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-26 11:45:07,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:07,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-26 11:45:07,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-26 11:45:07,659 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 11:45:07,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:07,915 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2023-11-26 11:45:07,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 11:45:07,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-11-26 11:45:07,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:07,917 INFO L225 Difference]: With dead ends: 92 [2023-11-26 11:45:07,917 INFO L226 Difference]: Without dead ends: 92 [2023-11-26 11:45:07,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-26 11:45:07,918 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 22 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:07,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 300 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:45:07,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-11-26 11:45:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-11-26 11:45:07,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.7777777777777777) internal successors, (96), 87 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:45:07,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2023-11-26 11:45:07,923 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 29 [2023-11-26 11:45:07,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:07,923 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2023-11-26 11:45:07,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 11:45:07,924 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2023-11-26 11:45:07,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-26 11:45:07,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:07,925 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:07,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-26 11:45:07,926 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:45:07,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:07,926 INFO L85 PathProgramCache]: Analyzing trace with hash 221202260, now seen corresponding path program 1 times [2023-11-26 11:45:07,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:07,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939642774] [2023-11-26 11:45:07,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:07,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:08,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:45:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:08,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:45:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:08,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:45:08,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:08,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:45:08,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:08,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939642774] [2023-11-26 11:45:08,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939642774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:08,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261279837] [2023-11-26 11:45:08,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:08,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:08,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:08,243 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:08,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 11:45:08,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:08,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 11:45:08,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:08,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:45:08,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-26 11:45:08,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:08,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261279837] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:08,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:45:08,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2023-11-26 11:45:08,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841382932] [2023-11-26 11:45:08,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:08,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:45:08,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:08,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:45:08,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2023-11-26 11:45:08,587 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 6 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 11:45:08,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:08,781 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2023-11-26 11:45:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:45:08,782 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-11-26 11:45:08,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:08,783 INFO L225 Difference]: With dead ends: 90 [2023-11-26 11:45:08,783 INFO L226 Difference]: Without dead ends: 90 [2023-11-26 11:45:08,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-11-26 11:45:08,784 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 19 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:08,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 275 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-26 11:45:08,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-26 11:45:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-11-26 11:45:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 54 states have (on average 1.7407407407407407) internal successors, (94), 85 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:45:08,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2023-11-26 11:45:08,788 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 29 [2023-11-26 11:45:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:08,788 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2023-11-26 11:45:08,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 11:45:08,789 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2023-11-26 11:45:08,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 11:45:08,790 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:08,790 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:08,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:08,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-26 11:45:08,990 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:45:08,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:08,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1732650497, now seen corresponding path program 1 times [2023-11-26 11:45:08,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:08,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344083978] [2023-11-26 11:45:08,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:08,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:09,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:09,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:45:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:09,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:45:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:09,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:45:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-26 11:45:09,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:09,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344083978] [2023-11-26 11:45:09,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344083978] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:09,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229345641] [2023-11-26 11:45:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:09,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:09,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:09,516 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:09,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 11:45:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:09,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 11:45:09,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:09,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 11:45:09,855 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 9 treesize of output 3 [2023-11-26 11:45:09,878 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-11-26 11:45:09,899 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-26 11:45:09,900 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 16 treesize of output 18 [2023-11-26 11:45:09,948 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 17 treesize of output 9 [2023-11-26 11:45:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-11-26 11:45:09,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:10,102 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 18 treesize of output 10 [2023-11-26 11:45:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:10,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229345641] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:10,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:45:10,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 9] total 19 [2023-11-26 11:45:10,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591982219] [2023-11-26 11:45:10,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:10,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-26 11:45:10,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:10,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-26 11:45:10,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=293, Unknown=1, NotChecked=34, Total=380 [2023-11-26 11:45:10,147 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 20 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 4 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-26 11:45:10,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:10,757 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2023-11-26 11:45:10,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-26 11:45:10,758 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 4 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 30 [2023-11-26 11:45:10,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:10,759 INFO L225 Difference]: With dead ends: 94 [2023-11-26 11:45:10,759 INFO L226 Difference]: Without dead ends: 94 [2023-11-26 11:45:10,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=511, Unknown=1, NotChecked=46, Total=650 [2023-11-26 11:45:10,760 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 111 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:10,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 578 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 675 Invalid, 0 Unknown, 101 Unchecked, 0.5s Time] [2023-11-26 11:45:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-26 11:45:10,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2023-11-26 11:45:10,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 55 states have (on average 1.709090909090909) internal successors, (94), 84 states have internal predecessors, (94), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:45:10,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 100 transitions. [2023-11-26 11:45:10,764 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 100 transitions. Word has length 30 [2023-11-26 11:45:10,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:10,765 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 100 transitions. [2023-11-26 11:45:10,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 states have internal predecessors, (45), 4 states have call successors, (9), 4 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-26 11:45:10,765 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 100 transitions. [2023-11-26 11:45:10,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-26 11:45:10,766 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:10,766 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:10,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:10,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-26 11:45:10,967 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:45:10,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:10,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1732650496, now seen corresponding path program 1 times [2023-11-26 11:45:10,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:10,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285043401] [2023-11-26 11:45:10,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:10,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:11,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:45:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:11,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:45:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:11,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:45:11,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:11,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:45:11,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:11,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285043401] [2023-11-26 11:45:11,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285043401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:11,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811047910] [2023-11-26 11:45:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:11,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:11,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:11,665 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:11,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 11:45:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:11,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-26 11:45:11,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:11,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 11:45:12,108 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 9 treesize of output 3 [2023-11-26 11:45:12,112 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 9 treesize of output 3 [2023-11-26 11:45:12,163 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (exists ((|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_6| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_6|) 0) 0))) is different from true [2023-11-26 11:45:12,223 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-26 11:45:12,223 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 [2023-11-26 11:45:12,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-26 11:45:12,322 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 17 treesize of output 9 [2023-11-26 11:45:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-11-26 11:45:12,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:12,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811047910] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:12,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:12,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2023-11-26 11:45:12,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165579707] [2023-11-26 11:45:12,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:12,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 11:45:12,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:12,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 11:45:12,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=486, Unknown=1, NotChecked=44, Total=600 [2023-11-26 11:45:12,527 INFO L87 Difference]: Start difference. First operand 89 states and 100 transitions. Second operand has 22 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 11:45:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:13,427 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2023-11-26 11:45:13,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-26 11:45:13,428 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 30 [2023-11-26 11:45:13,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:13,430 INFO L225 Difference]: With dead ends: 102 [2023-11-26 11:45:13,430 INFO L226 Difference]: Without dead ends: 102 [2023-11-26 11:45:13,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=865, Unknown=1, NotChecked=60, Total=1056 [2023-11-26 11:45:13,431 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 121 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:13,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 545 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 670 Invalid, 0 Unknown, 109 Unchecked, 0.6s Time] [2023-11-26 11:45:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-26 11:45:13,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2023-11-26 11:45:13,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 63 states have (on average 1.619047619047619) internal successors, (102), 92 states have internal predecessors, (102), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:45:13,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2023-11-26 11:45:13,436 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 30 [2023-11-26 11:45:13,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:13,436 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2023-11-26 11:45:13,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 18 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 11:45:13,436 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2023-11-26 11:45:13,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-26 11:45:13,437 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:13,438 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:13,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:13,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-26 11:45:13,645 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:45:13,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:13,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1356677081, now seen corresponding path program 1 times [2023-11-26 11:45:13,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:13,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266350589] [2023-11-26 11:45:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:13,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:13,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:45:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:13,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:45:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:13,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:45:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:45:13,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:13,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266350589] [2023-11-26 11:45:13,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266350589] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:13,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000784512] [2023-11-26 11:45:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:13,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:13,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:14,015 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:14,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 11:45:14,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:14,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-26 11:45:14,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:14,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-26 11:45:14,314 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 5 treesize of output 3 [2023-11-26 11:45:14,337 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2023-11-26 11:45:14,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:45:14,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:45:14,393 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 5 treesize of output 3 [2023-11-26 11:45:14,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:45:14,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:45:14,468 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 5 treesize of output 3 [2023-11-26 11:45:14,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:45:14,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:45:14,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-26 11:45:14,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 11:45:14,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000784512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:14,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-26 11:45:14,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 14 [2023-11-26 11:45:14,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418095877] [2023-11-26 11:45:14,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:14,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 11:45:14,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:14,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 11:45:14,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=132, Unknown=1, NotChecked=22, Total=182 [2023-11-26 11:45:14,548 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 11:45:14,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:14,671 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2023-11-26 11:45:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 11:45:14,672 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2023-11-26 11:45:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:14,673 INFO L225 Difference]: With dead ends: 94 [2023-11-26 11:45:14,673 INFO L226 Difference]: Without dead ends: 94 [2023-11-26 11:45:14,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=132, Unknown=1, NotChecked=22, Total=182 [2023-11-26 11:45:14,674 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 68 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:14,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 141 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 117 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2023-11-26 11:45:14,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-26 11:45:14,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-26 11:45:14,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.5555555555555556) internal successors, (98), 88 states have internal predecessors, (98), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:45:14,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2023-11-26 11:45:14,678 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 32 [2023-11-26 11:45:14,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:14,678 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2023-11-26 11:45:14,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-26 11:45:14,679 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2023-11-26 11:45:14,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 11:45:14,679 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:14,679 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:14,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:14,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-26 11:45:14,887 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:45:14,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:14,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1903228543, now seen corresponding path program 1 times [2023-11-26 11:45:14,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:14,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854651512] [2023-11-26 11:45:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:14,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:15,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:45:15,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:15,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:45:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:15,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:45:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-26 11:45:15,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:15,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854651512] [2023-11-26 11:45:15,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854651512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 11:45:15,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 11:45:15,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-26 11:45:15,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486884470] [2023-11-26 11:45:15,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 11:45:15,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 11:45:15,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:15,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 11:45:15,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-26 11:45:15,245 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 10 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:45:15,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:15,552 INFO L93 Difference]: Finished difference Result 161 states and 178 transitions. [2023-11-26 11:45:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-26 11:45:15,553 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-11-26 11:45:15,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:15,554 INFO L225 Difference]: With dead ends: 161 [2023-11-26 11:45:15,554 INFO L226 Difference]: Without dead ends: 161 [2023-11-26 11:45:15,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-11-26 11:45:15,555 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 176 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:15,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 291 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 11:45:15,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-26 11:45:15,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 97. [2023-11-26 11:45:15,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 67 states have (on average 1.5223880597014925) internal successors, (102), 91 states have internal predecessors, (102), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:45:15,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2023-11-26 11:45:15,560 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 34 [2023-11-26 11:45:15,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:15,560 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2023-11-26 11:45:15,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-26 11:45:15,564 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2023-11-26 11:45:15,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 11:45:15,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:15,568 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:15,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-26 11:45:15,569 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:45:15,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:15,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1903228542, now seen corresponding path program 1 times [2023-11-26 11:45:15,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:15,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065174527] [2023-11-26 11:45:15,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:15,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:15,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:45:15,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:15,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:45:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:15,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:45:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:45:15,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:15,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065174527] [2023-11-26 11:45:15,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065174527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:15,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591059044] [2023-11-26 11:45:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:15,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:15,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:15,888 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:15,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 11:45:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:16,149 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 11:45:16,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:16,352 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 16 treesize of output 8 [2023-11-26 11:45:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 11:45:16,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:16,405 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 8 treesize of output 4 [2023-11-26 11:45:16,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-26 11:45:16,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591059044] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 11:45:16,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 11:45:16,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 18 [2023-11-26 11:45:16,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942721118] [2023-11-26 11:45:16,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:16,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-26 11:45:16,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:16,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-26 11:45:16,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-11-26 11:45:16,443 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-26 11:45:20,456 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 11:45:24,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 11:45:28,488 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 11:45:32,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 11:45:36,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 11:45:40,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 11:45:40,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:40,930 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2023-11-26 11:45:40,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-26 11:45:40,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 34 [2023-11-26 11:45:40,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:40,932 INFO L225 Difference]: With dead ends: 94 [2023-11-26 11:45:40,932 INFO L226 Difference]: Without dead ends: 94 [2023-11-26 11:45:40,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2023-11-26 11:45:40,934 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 175 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 1 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:40,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 808 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 395 Invalid, 6 Unknown, 0 Unchecked, 24.3s Time] [2023-11-26 11:45:40,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-26 11:45:40,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2023-11-26 11:45:40,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.540983606557377) internal successors, (94), 85 states have internal predecessors, (94), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-26 11:45:40,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2023-11-26 11:45:40,938 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 34 [2023-11-26 11:45:40,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:40,939 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2023-11-26 11:45:40,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 15 states have internal predecessors, (43), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-26 11:45:40,939 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2023-11-26 11:45:40,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 11:45:40,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:40,940 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:40,947 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:41,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-26 11:45:41,148 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:45:41,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:41,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1808062286, now seen corresponding path program 1 times [2023-11-26 11:45:41,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:41,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549859265] [2023-11-26 11:45:41,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:41,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:41,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:45:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:41,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:45:41,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:42,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:45:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:45:42,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:42,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549859265] [2023-11-26 11:45:42,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549859265] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:42,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463864279] [2023-11-26 11:45:42,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:42,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:42,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:42,265 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:42,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 11:45:42,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:42,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 81 conjunts are in the unsatisfiable core [2023-11-26 11:45:42,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:42,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 11:45:42,836 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-26 11:45:42,838 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 17 treesize of output 21 [2023-11-26 11:45:42,956 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 11 treesize of output 7 [2023-11-26 11:45:43,065 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-26 11:45:43,065 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 41 [2023-11-26 11:45:43,127 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 30 treesize of output 14 [2023-11-26 11:45:43,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-26 11:45:43,354 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.base| |node_create_~temp~0#1.base|))))) (exists ((|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_9| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_9|) 0) 0))) is different from true [2023-11-26 11:45:43,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-26 11:45:43,375 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 38 treesize of output 27 [2023-11-26 11:45:43,416 INFO L349 Elim1Store]: treesize reduction 76, result has 36.1 percent of original size [2023-11-26 11:45:43,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 52 [2023-11-26 11:45:43,524 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 46 treesize of output 26 [2023-11-26 11:45:43,611 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 [2023-11-26 11:45:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-26 11:45:43,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 11:45:43,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463864279] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:43,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 11:45:43,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 35 [2023-11-26 11:45:43,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859085842] [2023-11-26 11:45:43,797 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 11:45:43,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-26 11:45:43,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 11:45:43,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-26 11:45:43,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1144, Unknown=1, NotChecked=68, Total=1332 [2023-11-26 11:45:43,800 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 36 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 29 states have internal predecessors, (55), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 11:45:44,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 11:45:44,993 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2023-11-26 11:45:44,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 11:45:44,994 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 29 states have internal predecessors, (55), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 34 [2023-11-26 11:45:44,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 11:45:44,996 INFO L225 Difference]: With dead ends: 127 [2023-11-26 11:45:44,996 INFO L226 Difference]: Without dead ends: 127 [2023-11-26 11:45:44,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=238, Invalid=2021, Unknown=1, NotChecked=92, Total=2352 [2023-11-26 11:45:44,998 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 161 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-26 11:45:44,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 822 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1005 Invalid, 0 Unknown, 130 Unchecked, 0.8s Time] [2023-11-26 11:45:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-26 11:45:45,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2023-11-26 11:45:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 102 states have internal predecessors, (114), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-26 11:45:45,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 124 transitions. [2023-11-26 11:45:45,004 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 124 transitions. Word has length 34 [2023-11-26 11:45:45,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 11:45:45,005 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 124 transitions. [2023-11-26 11:45:45,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 29 states have internal predecessors, (55), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-26 11:45:45,005 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 124 transitions. [2023-11-26 11:45:45,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-26 11:45:45,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 11:45:45,006 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 11:45:45,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-26 11:45:45,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-26 11:45:45,213 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2023-11-26 11:45:45,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 11:45:45,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1808062285, now seen corresponding path program 1 times [2023-11-26 11:45:45,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 11:45:45,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075627075] [2023-11-26 11:45:45,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:45,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 11:45:45,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:46,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-26 11:45:46,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:46,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-26 11:45:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:46,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-26 11:45:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-26 11:45:46,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 11:45:46,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075627075] [2023-11-26 11:45:46,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075627075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 11:45:46,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922016446] [2023-11-26 11:45:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 11:45:46,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 11:45:46,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 11:45:46,880 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 11:45:46,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_93b93123-12f6-4afd-a35a-08c7fa6dfdab/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-26 11:45:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 11:45:47,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 107 conjunts are in the unsatisfiable core [2023-11-26 11:45:47,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 11:45:47,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-26 11:45:47,600 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-26 11:45:47,601 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 11 treesize of output 11 [2023-11-26 11:45:47,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-26 11:45:47,757 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 11 treesize of output 7 [2023-11-26 11:45:47,764 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 11 treesize of output 7 [2023-11-26 11:45:47,904 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-26 11:45:47,904 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 60 [2023-11-26 11:45:47,918 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 36 treesize of output 15 [2023-11-26 11:45:48,015 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 43 treesize of output 19 [2023-11-26 11:45:48,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-26 11:45:48,028 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 5 treesize of output 3 [2023-11-26 11:45:48,034 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 11 treesize of output 3