./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_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_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:27:09,084 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:27:09,197 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:27:09,205 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:27:09,206 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:27:09,244 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:27:09,244 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:27:09,245 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:27:09,246 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:27:09,251 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:27:09,251 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:27:09,253 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:27:09,253 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:27:09,255 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:27:09,255 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:27:09,256 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:27:09,256 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:27:09,257 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:27:09,257 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:27:09,258 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:27:09,259 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:27:09,260 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:27:09,260 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:27:09,261 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:27:09,261 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:27:09,262 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:27:09,262 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:27:09,270 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:27:09,270 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:27:09,271 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:27:09,271 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:27:09,271 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:27:09,272 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:27:09,272 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:27:09,272 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:27:09,273 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:27:09,273 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:27:09,273 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:27:09,273 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:27:09,274 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:27:09,274 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:27:09,274 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_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 742ffe63db70127807dbc7584eb0c51633a9ed1be5f19fa1a247e43392d52dab [2023-11-24 21:27:09,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:27:09,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:27:09,645 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:27:09,647 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:27:09,648 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:27:09,649 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2023-11-24 21:27:12,797 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:27:13,071 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:27:13,072 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/sv-benchmarks/c/list-simple/sll2n_append_unequal.i [2023-11-24 21:27:13,102 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/data/5aedb2917/dce50b52f4d14bfbb052f9c9dc19990b/FLAG152189459 [2023-11-24 21:27:13,126 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/data/5aedb2917/dce50b52f4d14bfbb052f9c9dc19990b [2023-11-24 21:27:13,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:27:13,134 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:27:13,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:27:13,138 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:27:13,144 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:27:13,145 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:27:13" (1/1) ... [2023-11-24 21:27:13,146 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ddc5f54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:13, skipping insertion in model container [2023-11-24 21:27:13,146 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:27:13" (1/1) ... [2023-11-24 21:27:13,220 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:27:13,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:27:13,653 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:27:13,756 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:27:13,789 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:27:13,790 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:13 WrapperNode [2023-11-24 21:27:13,790 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:27:13,791 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:27:13,792 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:27:13,792 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:27:13,801 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:13" (1/1) ... [2023-11-24 21:27:13,822 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:13" (1/1) ... [2023-11-24 21:27:13,864 INFO L138 Inliner]: procedures = 127, calls = 37, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 143 [2023-11-24 21:27:13,864 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:27:13,865 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:27:13,865 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:27:13,865 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:27:13,883 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:13" (1/1) ... [2023-11-24 21:27:13,884 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:13" (1/1) ... [2023-11-24 21:27:13,892 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:13" (1/1) ... [2023-11-24 21:27:13,935 INFO L175 MemorySlicer]: Split 20 memory accesses to 3 slices as follows [2, 12, 6]. 60 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 5 writes are split as follows [0, 4, 1]. [2023-11-24 21:27:13,935 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:13" (1/1) ... [2023-11-24 21:27:13,935 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:13" (1/1) ... [2023-11-24 21:27:13,962 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:13" (1/1) ... [2023-11-24 21:27:13,967 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:13" (1/1) ... [2023-11-24 21:27:13,970 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:13" (1/1) ... [2023-11-24 21:27:13,986 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:13" (1/1) ... [2023-11-24 21:27:13,990 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:27:13,991 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:27:13,992 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:27:13,992 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:27:13,993 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:13" (1/1) ... [2023-11-24 21:27:14,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:27:14,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:14,040 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:27:14,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:27:14,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:27:14,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:27:14,102 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:27:14,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:27:14,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:27:14,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:27:14,104 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-24 21:27:14,105 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-24 21:27:14,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:27:14,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:27:14,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:27:14,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:27:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:27:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:27:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:27:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:27:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:27:14,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:27:14,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-24 21:27:14,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-24 21:27:14,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-24 21:27:14,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:27:14,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:27:14,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:27:14,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:27:14,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:27:14,364 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:27:14,368 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:27:14,866 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:27:14,929 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:27:14,929 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 21:27:14,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:27:14 BoogieIcfgContainer [2023-11-24 21:27:14,930 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:27:14,933 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:27:14,933 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:27:14,937 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:27:14,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:27:13" (1/3) ... [2023-11-24 21:27:14,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b27f6d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:27:14, skipping insertion in model container [2023-11-24 21:27:14,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:27:13" (2/3) ... [2023-11-24 21:27:14,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b27f6d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:27:14, skipping insertion in model container [2023-11-24 21:27:14,939 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:27:14" (3/3) ... [2023-11-24 21:27:14,941 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_append_unequal.i [2023-11-24 21:27:14,961 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:27:14,962 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 39 error locations. [2023-11-24 21:27:15,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:27:15,021 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;@77d78f83, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:27:15,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2023-11-24 21:27:15,027 INFO L276 IsEmpty]: Start isEmpty. Operand has 86 states, 43 states have (on average 2.255813953488372) internal successors, (97), 82 states have internal predecessors, (97), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:27:15,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:27:15,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:15,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:27:15,038 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:15,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:15,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1989545633, now seen corresponding path program 1 times [2023-11-24 21:27:15,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:15,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416638473] [2023-11-24 21:27:15,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:15,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:15,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:15,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:15,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:15,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416638473] [2023-11-24 21:27:15,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416638473] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:15,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:27:15,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:27:15,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297741343] [2023-11-24 21:27:15,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:15,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:27:15,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:15,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:27:15,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:27:15,430 INFO L87 Difference]: Start difference. First operand has 86 states, 43 states have (on average 2.255813953488372) internal successors, (97), 82 states have internal predecessors, (97), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:15,565 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2023-11-24 21:27:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:27:15,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 21:27:15,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:15,579 INFO L225 Difference]: With dead ends: 83 [2023-11-24 21:27:15,579 INFO L226 Difference]: Without dead ends: 81 [2023-11-24 21:27:15,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:27:15,585 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 6 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:15,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 120 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:27:15,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-24 21:27:15,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-24 21:27:15,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 41 states have (on average 2.073170731707317) internal successors, (85), 77 states have internal predecessors, (85), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:27:15,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2023-11-24 21:27:15,653 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 6 [2023-11-24 21:27:15,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:15,654 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2023-11-24 21:27:15,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2023-11-24 21:27:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:27:15,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:15,656 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:27:15,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:27:15,657 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:15,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:15,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1989545634, now seen corresponding path program 1 times [2023-11-24 21:27:15,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:15,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526425196] [2023-11-24 21:27:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:15,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:15,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:15,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526425196] [2023-11-24 21:27:15,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526425196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:15,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:27:15,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:27:15,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371911912] [2023-11-24 21:27:15,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:15,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:27:15,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:15,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:27:15,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:27:15,849 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:15,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:15,993 INFO L93 Difference]: Finished difference Result 79 states and 87 transitions. [2023-11-24 21:27:15,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:27:15,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-24 21:27:15,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:15,996 INFO L225 Difference]: With dead ends: 79 [2023-11-24 21:27:15,996 INFO L226 Difference]: Without dead ends: 79 [2023-11-24 21:27:15,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:27:15,998 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 2 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:15,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 123 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:27:16,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-24 21:27:16,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-11-24 21:27:16,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 41 states have (on average 2.024390243902439) internal successors, (83), 75 states have internal predecessors, (83), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:27:16,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2023-11-24 21:27:16,010 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 6 [2023-11-24 21:27:16,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:16,010 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2023-11-24 21:27:16,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:27:16,011 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2023-11-24 21:27:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:27:16,012 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:16,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:16,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:27:16,013 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:16,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:16,013 INFO L85 PathProgramCache]: Analyzing trace with hash 168393874, now seen corresponding path program 1 times [2023-11-24 21:27:16,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:16,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356988777] [2023-11-24 21:27:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:16,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:16,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:16,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:16,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356988777] [2023-11-24 21:27:16,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356988777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:16,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:27:16,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:27:16,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984916354] [2023-11-24 21:27:16,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:16,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:27:16,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:16,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:27:16,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:27:16,386 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2023-11-24 21:27:16,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:16,692 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2023-11-24 21:27:16,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:27:16,693 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 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 [2023-11-24 21:27:16,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:16,696 INFO L225 Difference]: With dead ends: 81 [2023-11-24 21:27:16,696 INFO L226 Difference]: Without dead ends: 81 [2023-11-24 21:27:16,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:27:16,699 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 6 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:16,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 281 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:27:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-24 21:27:16,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2023-11-24 21:27:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 41 states have (on average 2.0) internal successors, (82), 74 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:27:16,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2023-11-24 21:27:16,719 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 10 [2023-11-24 21:27:16,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:16,719 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2023-11-24 21:27:16,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2023-11-24 21:27:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2023-11-24 21:27:16,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:27:16,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:16,722 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:16,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:27:16,722 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:16,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash 168393875, now seen corresponding path program 1 times [2023-11-24 21:27:16,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:16,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031509737] [2023-11-24 21:27:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:16,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:16,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:16,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:17,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:17,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031509737] [2023-11-24 21:27:17,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031509737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:17,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:27:17,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:27:17,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035891477] [2023-11-24 21:27:17,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:17,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:27:17,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:17,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:27:17,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:27:17,075 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2023-11-24 21:27:17,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:17,357 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2023-11-24 21:27:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:27:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 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 [2023-11-24 21:27:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:17,359 INFO L225 Difference]: With dead ends: 80 [2023-11-24 21:27:17,360 INFO L226 Difference]: Without dead ends: 80 [2023-11-24 21:27:17,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:27:17,362 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 4 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:17,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 297 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:27:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-24 21:27:17,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2023-11-24 21:27:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 41 states have (on average 1.975609756097561) internal successors, (81), 73 states have internal predecessors, (81), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:27:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 85 transitions. [2023-11-24 21:27:17,371 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 85 transitions. Word has length 10 [2023-11-24 21:27:17,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:17,372 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 85 transitions. [2023-11-24 21:27:17,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 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) [2023-11-24 21:27:17,373 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 85 transitions. [2023-11-24 21:27:17,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 21:27:17,374 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:17,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:17,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:27:17,374 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:17,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:17,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1253373483, now seen corresponding path program 1 times [2023-11-24 21:27:17,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:17,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399990461] [2023-11-24 21:27:17,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:17,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:17,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-24 21:27:17,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:17,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:17,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399990461] [2023-11-24 21:27:17,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399990461] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:17,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:27:17,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:27:17,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313790072] [2023-11-24 21:27:17,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:17,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:27:17,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:17,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:27:17,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:27:17,457 INFO L87 Difference]: Start difference. First operand 77 states and 85 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-24 21:27:17,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:17,576 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2023-11-24 21:27:17,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:27:17,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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 11 [2023-11-24 21:27:17,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:17,578 INFO L225 Difference]: With dead ends: 81 [2023-11-24 21:27:17,578 INFO L226 Difference]: Without dead ends: 81 [2023-11-24 21:27:17,578 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 [2023-11-24 21:27:17,579 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 2 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:17,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 173 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:27:17,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-24 21:27:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2023-11-24 21:27:17,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 42 states have (on average 1.9523809523809523) internal successors, (82), 74 states have internal predecessors, (82), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:27:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2023-11-24 21:27:17,588 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 11 [2023-11-24 21:27:17,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:17,588 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2023-11-24 21:27:17,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-24 21:27:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2023-11-24 21:27:17,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 21:27:17,590 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:17,590 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:17,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:27:17,591 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:17,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:17,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1618401022, now seen corresponding path program 1 times [2023-11-24 21:27:17,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:17,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886027798] [2023-11-24 21:27:17,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:17,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:17,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:17,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-11-24 21:27:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 21:27:17,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:17,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886027798] [2023-11-24 21:27:17,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886027798] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:17,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829868505] [2023-11-24 21:27:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:17,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:17,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:17,756 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:17,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:27:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:17,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:27:17,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:27:18,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 21:27:18,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829868505] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:27:18,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:27:18,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-11-24 21:27:18,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815163342] [2023-11-24 21:27:18,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:18,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:27:18,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:18,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:27:18,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:27:18,073 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:27:18,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:18,215 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2023-11-24 21:27:18,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:27:18,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2023-11-24 21:27:18,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:18,217 INFO L225 Difference]: With dead ends: 82 [2023-11-24 21:27:18,217 INFO L226 Difference]: Without dead ends: 82 [2023-11-24 21:27:18,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:27:18,221 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 2 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:18,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 241 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:27:18,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-24 21:27:18,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-11-24 21:27:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 77 states have internal predecessors, (85), 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) [2023-11-24 21:27:18,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2023-11-24 21:27:18,230 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 20 [2023-11-24 21:27:18,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:18,231 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2023-11-24 21:27:18,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 21:27:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2023-11-24 21:27:18,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:27:18,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:18,234 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:18,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:18,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:18,443 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:18,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:18,444 INFO L85 PathProgramCache]: Analyzing trace with hash 84199413, now seen corresponding path program 2 times [2023-11-24 21:27:18,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:18,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092393065] [2023-11-24 21:27:18,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:18,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:18,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:19,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-24 21:27:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:19,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:27:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:27:19,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:19,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092393065] [2023-11-24 21:27:19,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092393065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:19,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341168986] [2023-11-24 21:27:19,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:27:19,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:19,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:19,303 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:19,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:27:19,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:27:19,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:27:19,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-24 21:27:19,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:19,534 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 [2023-11-24 21:27:19,566 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 [2023-11-24 21:27:19,602 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-24 21:27:19,603 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 [2023-11-24 21:27:19,713 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:27:19,714 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 14 treesize of output 13 [2023-11-24 21:27:19,807 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 9 treesize of output 5 [2023-11-24 21:27:19,854 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-24 21:27:19,855 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 [2023-11-24 21:27:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 8 not checked. [2023-11-24 21:27:19,870 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:20,062 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 [2023-11-24 21:27:20,519 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-24 21:27:20,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341168986] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:27:20,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:27:20,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 20 [2023-11-24 21:27:20,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101739638] [2023-11-24 21:27:20,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:20,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-24 21:27:20,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:20,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-24 21:27:20,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=336, Unknown=1, NotChecked=38, Total=462 [2023-11-24 21:27:20,524 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 22 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-24 21:27:21,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:21,069 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2023-11-24 21:27:21,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:27:21,070 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) Word has length 29 [2023-11-24 21:27:21,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:21,071 INFO L225 Difference]: With dead ends: 88 [2023-11-24 21:27:21,071 INFO L226 Difference]: Without dead ends: 88 [2023-11-24 21:27:21,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=127, Invalid=476, Unknown=1, NotChecked=46, Total=650 [2023-11-24 21:27:21,073 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 151 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:21,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 309 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 369 Invalid, 0 Unknown, 93 Unchecked, 0.4s Time] [2023-11-24 21:27:21,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-11-24 21:27:21,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2023-11-24 21:27:21,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 72 states have internal predecessors, (80), 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) [2023-11-24 21:27:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-11-24 21:27:21,079 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 29 [2023-11-24 21:27:21,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:21,080 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-11-24 21:27:21,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 3 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (9), 5 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-24 21:27:21,088 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-11-24 21:27:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:27:21,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:21,093 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:21,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:21,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:21,300 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:21,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:21,301 INFO L85 PathProgramCache]: Analyzing trace with hash 84199414, now seen corresponding path program 1 times [2023-11-24 21:27:21,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:21,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426625640] [2023-11-24 21:27:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:21,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:22,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:22,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-24 21:27:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:22,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:27:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-24 21:27:22,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:22,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426625640] [2023-11-24 21:27:22,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426625640] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:22,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094161350] [2023-11-24 21:27:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:22,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:22,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:22,318 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:22,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:27:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:22,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-24 21:27:22,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:22,515 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 [2023-11-24 21:27:22,562 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 [2023-11-24 21:27:22,587 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 [2023-11-24 21:27:22,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:22,639 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 [2023-11-24 21:27:22,681 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 [2023-11-24 21:27:22,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:22,767 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 [2023-11-24 21:27:22,842 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 [2023-11-24 21:27:22,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:22,906 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 [2023-11-24 21:27:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-24 21:27:22,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:27:22,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094161350] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:22,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:27:22,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-11-24 21:27:22,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766016465] [2023-11-24 21:27:22,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:22,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:27:22,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:22,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:27:22,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2023-11-24 21:27:22,937 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:27:23,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:23,084 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2023-11-24 21:27:23,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:27:23,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-11-24 21:27:23,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:23,086 INFO L225 Difference]: With dead ends: 74 [2023-11-24 21:27:23,086 INFO L226 Difference]: Without dead ends: 74 [2023-11-24 21:27:23,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=143, Unknown=1, NotChecked=24, Total=210 [2023-11-24 21:27:23,087 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 17 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:23,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 172 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 95 Unchecked, 0.1s Time] [2023-11-24 21:27:23,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-24 21:27:23,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-11-24 21:27:23,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.711111111111111) internal successors, (77), 69 states have internal predecessors, (77), 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) [2023-11-24 21:27:23,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2023-11-24 21:27:23,099 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 29 [2023-11-24 21:27:23,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:23,100 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2023-11-24 21:27:23,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:27:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2023-11-24 21:27:23,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 21:27:23,101 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:23,102 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:23,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:23,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:23,314 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:23,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:23,315 INFO L85 PathProgramCache]: Analyzing trace with hash 123823616, now seen corresponding path program 1 times [2023-11-24 21:27:23,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:23,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293372074] [2023-11-24 21:27:23,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:23,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:23,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:23,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:23,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:23,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-24 21:27:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:23,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:27:23,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:24,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 21:27:24,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:24,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293372074] [2023-11-24 21:27:24,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293372074] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:24,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818109086] [2023-11-24 21:27:24,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:24,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:24,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:24,089 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:24,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:27:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:24,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-24 21:27:24,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:24,337 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 [2023-11-24 21:27:24,667 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 [2023-11-24 21:27:24,672 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 [2023-11-24 21:27:24,730 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_4| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_4|) 0) 0)) (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 [2023-11-24 21:27:24,793 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-24 21:27:24,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-24 21:27:24,800 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 [2023-11-24 21:27:24,912 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 [2023-11-24 21:27:24,950 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2023-11-24 21:27:24,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:25,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818109086] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:25,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:27:25,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 25 [2023-11-24 21:27:25,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906302151] [2023-11-24 21:27:25,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:25,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 21:27:25,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:25,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 21:27:25,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=682, Unknown=1, NotChecked=52, Total=812 [2023-11-24 21:27:25,194 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand has 26 states, 20 states have (on average 2.35) internal successors, (47), 22 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-24 21:27:26,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:26,538 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2023-11-24 21:27:26,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:27:26,538 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 20 states have (on average 2.35) internal successors, (47), 22 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2023-11-24 21:27:26,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:26,540 INFO L225 Difference]: With dead ends: 87 [2023-11-24 21:27:26,540 INFO L226 Difference]: Without dead ends: 87 [2023-11-24 21:27:26,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=167, Invalid=1318, Unknown=1, NotChecked=74, Total=1560 [2023-11-24 21:27:26,542 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 135 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:26,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 668 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 955 Invalid, 0 Unknown, 89 Unchecked, 0.8s Time] [2023-11-24 21:27:26,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-24 21:27:26,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 83. [2023-11-24 21:27:26,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 53 states have (on average 1.679245283018868) internal successors, (89), 77 states have internal predecessors, (89), 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) [2023-11-24 21:27:26,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2023-11-24 21:27:26,555 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 32 [2023-11-24 21:27:26,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:26,556 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2023-11-24 21:27:26,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 20 states have (on average 2.35) internal successors, (47), 22 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-24 21:27:26,556 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2023-11-24 21:27:26,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 21:27:26,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:26,557 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:26,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:26,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-24 21:27:26,768 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:26,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:26,769 INFO L85 PathProgramCache]: Analyzing trace with hash 123823615, now seen corresponding path program 1 times [2023-11-24 21:27:26,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:26,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653352282] [2023-11-24 21:27:26,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:26,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:26,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:27,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:27,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:27,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-24 21:27:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:27,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:27:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:27,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:27:27,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:27,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653352282] [2023-11-24 21:27:27,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653352282] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:27,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220754190] [2023-11-24 21:27:27,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:27,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:27,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:27,213 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:27,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:27:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:27,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-24 21:27:27,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:27,449 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 [2023-11-24 21:27:27,557 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 [2023-11-24 21:27:27,580 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 [2023-11-24 21:27:27,627 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-24 21:27:27,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2023-11-24 21:27:27,648 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 [2023-11-24 21:27:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 4 not checked. [2023-11-24 21:27:27,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:27,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220754190] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:27,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:27:27,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2023-11-24 21:27:27,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31862178] [2023-11-24 21:27:27,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:27,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 21:27:27,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:27,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 21:27:27,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=295, Unknown=1, NotChecked=34, Total=380 [2023-11-24 21:27:27,724 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 19 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-24 21:27:28,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:28,142 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2023-11-24 21:27:28,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:27:28,143 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 32 [2023-11-24 21:27:28,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:28,144 INFO L225 Difference]: With dead ends: 82 [2023-11-24 21:27:28,144 INFO L226 Difference]: Without dead ends: 82 [2023-11-24 21:27:28,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=510, Unknown=1, NotChecked=46, Total=650 [2023-11-24 21:27:28,145 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 102 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:28,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 408 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 436 Invalid, 0 Unknown, 78 Unchecked, 0.3s Time] [2023-11-24 21:27:28,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-24 21:27:28,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2023-11-24 21:27:28,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 53 states have (on average 1.5849056603773586) internal successors, (84), 75 states have internal predecessors, (84), 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) [2023-11-24 21:27:28,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2023-11-24 21:27:28,150 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 32 [2023-11-24 21:27:28,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:28,150 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2023-11-24 21:27:28,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.6875) internal successors, (43), 15 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-24 21:27:28,151 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2023-11-24 21:27:28,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-24 21:27:28,152 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:28,152 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:28,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:28,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:28,364 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:28,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:28,365 INFO L85 PathProgramCache]: Analyzing trace with hash -456737288, now seen corresponding path program 1 times [2023-11-24 21:27:28,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:28,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282830690] [2023-11-24 21:27:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:28,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:28,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:28,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-24 21:27:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:28,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:27:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:27:28,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:28,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282830690] [2023-11-24 21:27:28,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282830690] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:28,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350409970] [2023-11-24 21:27:28,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:28,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:28,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:28,745 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:28,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:27:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:28,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-24 21:27:28,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:28,962 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 [2023-11-24 21:27:28,971 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 [2023-11-24 21:27:29,015 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 [2023-11-24 21:27:29,020 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 [2023-11-24 21:27:29,122 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:27:29,123 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 14 treesize of output 13 [2023-11-24 21:27:29,141 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:27:29,142 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 [2023-11-24 21:27:29,225 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 [2023-11-24 21:27:29,255 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 [2023-11-24 21:27:29,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:29,284 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 [2023-11-24 21:27:29,332 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 [2023-11-24 21:27:29,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:29,371 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 [2023-11-24 21:27:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 8 not checked. [2023-11-24 21:27:29,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:29,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350409970] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:29,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:27:29,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 19 [2023-11-24 21:27:29,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883904461] [2023-11-24 21:27:29,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:29,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 21:27:29,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:29,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 21:27:29,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=328, Unknown=1, NotChecked=36, Total=420 [2023-11-24 21:27:29,603 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 19 states, 17 states have (on average 2.588235294117647) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-24 21:27:30,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:30,270 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2023-11-24 21:27:30,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:27:30,271 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 2.588235294117647) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 33 [2023-11-24 21:27:30,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:30,272 INFO L225 Difference]: With dead ends: 89 [2023-11-24 21:27:30,272 INFO L226 Difference]: Without dead ends: 89 [2023-11-24 21:27:30,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=687, Unknown=1, NotChecked=54, Total=870 [2023-11-24 21:27:30,273 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 96 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:30,273 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 321 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 577 Invalid, 0 Unknown, 84 Unchecked, 0.4s Time] [2023-11-24 21:27:30,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-24 21:27:30,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2023-11-24 21:27:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 52 states have (on average 1.5384615384615385) internal successors, (80), 72 states have internal predecessors, (80), 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) [2023-11-24 21:27:30,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2023-11-24 21:27:30,280 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 33 [2023-11-24 21:27:30,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:30,281 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2023-11-24 21:27:30,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 2.588235294117647) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-24 21:27:30,281 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2023-11-24 21:27:30,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 21:27:30,284 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:30,284 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:30,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-24 21:27:30,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:30,491 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:30,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:30,491 INFO L85 PathProgramCache]: Analyzing trace with hash -547565936, now seen corresponding path program 1 times [2023-11-24 21:27:30,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:30,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210617604] [2023-11-24 21:27:30,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:30,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:30,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:31,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:32,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-24 21:27:32,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:32,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:27:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:27:32,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:32,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210617604] [2023-11-24 21:27:32,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210617604] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:32,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216798195] [2023-11-24 21:27:32,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:32,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:32,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:32,885 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:32,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:27:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:33,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 103 conjunts are in the unsatisfiable core [2023-11-24 21:27:33,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:33,614 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-24 21:27:33,614 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 [2023-11-24 21:27:33,623 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 [2023-11-24 21:27:33,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 21:27:33,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:27:34,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2023-11-24 21:27:34,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-11-24 21:27:34,047 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 [2023-11-24 21:27:34,053 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 [2023-11-24 21:27:34,369 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.offset| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.base| |node_create_~temp~0#1.base|))))) (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_6| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_6|) 0) 0))) is different from true [2023-11-24 21:27:34,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:34,401 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 51 treesize of output 34 [2023-11-24 21:27:34,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:34,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-24 21:27:34,458 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-24 21:27:34,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-11-24 21:27:34,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-24 21:27:34,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2023-11-24 21:27:34,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2023-11-24 21:27:34,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-24 21:27:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-24 21:27:34,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:35,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216798195] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:35,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:27:35,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2023-11-24 21:27:35,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543088313] [2023-11-24 21:27:35,218 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:35,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-24 21:27:35,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:35,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-24 21:27:35,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1845, Unknown=1, NotChecked=86, Total=2070 [2023-11-24 21:27:35,223 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand has 42 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 35 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 21:27:37,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:37,602 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2023-11-24 21:27:37,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-24 21:27:37,603 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 35 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 35 [2023-11-24 21:27:37,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:37,604 INFO L225 Difference]: With dead ends: 86 [2023-11-24 21:27:37,604 INFO L226 Difference]: Without dead ends: 86 [2023-11-24 21:27:37,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=388, Invalid=3775, Unknown=1, NotChecked=126, Total=4290 [2023-11-24 21:27:37,607 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 130 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:37,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 812 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1080 Invalid, 0 Unknown, 95 Unchecked, 1.1s Time] [2023-11-24 21:27:37,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-24 21:27:37,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2023-11-24 21:27:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.5454545454545454) internal successors, (85), 75 states have internal predecessors, (85), 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) [2023-11-24 21:27:37,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2023-11-24 21:27:37,612 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 35 [2023-11-24 21:27:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:37,612 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2023-11-24 21:27:37,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 33 states have (on average 1.7272727272727273) internal successors, (57), 35 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 21:27:37,613 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2023-11-24 21:27:37,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 21:27:37,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:37,630 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:37,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:37,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:37,831 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:37,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash -547565937, now seen corresponding path program 1 times [2023-11-24 21:27:37,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:37,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097947134] [2023-11-24 21:27:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:37,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:38,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:38,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:38,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-24 21:27:38,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:39,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:27:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:39,260 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:27:39,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:39,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097947134] [2023-11-24 21:27:39,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097947134] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:39,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858569669] [2023-11-24 21:27:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:39,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:39,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:39,262 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:39,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:27:39,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:39,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-24 21:27:39,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:39,634 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:27:39,635 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 14 treesize of output 13 [2023-11-24 21:27:39,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-24 21:27:39,830 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 19 treesize of output 5 [2023-11-24 21:27:39,842 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-24 21:27:39,842 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 7 [2023-11-24 21:27:39,986 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$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|))) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)))) is different from true [2023-11-24 21:27:39,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:39,999 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 28 treesize of output 23 [2023-11-24 21:27:40,032 INFO L349 Elim1Store]: treesize reduction 116, result has 32.2 percent of original size [2023-11-24 21:27:40,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 69 [2023-11-24 21:27:40,183 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 62 treesize of output 42 [2023-11-24 21:27:40,187 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 37 treesize of output 25 [2023-11-24 21:27:40,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2023-11-24 21:27:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-24 21:27:40,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:40,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858569669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:40,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:27:40,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 36 [2023-11-24 21:27:40,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354784423] [2023-11-24 21:27:40,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:40,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-24 21:27:40,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-24 21:27:40,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1347, Unknown=1, NotChecked=74, Total=1560 [2023-11-24 21:27:40,591 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 37 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 31 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 21:27:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:41,961 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2023-11-24 21:27:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-24 21:27:41,961 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 31 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 35 [2023-11-24 21:27:41,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:41,963 INFO L225 Difference]: With dead ends: 85 [2023-11-24 21:27:41,963 INFO L226 Difference]: Without dead ends: 85 [2023-11-24 21:27:41,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=294, Invalid=2465, Unknown=1, NotChecked=102, Total=2862 [2023-11-24 21:27:41,965 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 112 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 931 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:41,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 795 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 931 Invalid, 0 Unknown, 86 Unchecked, 0.8s Time] [2023-11-24 21:27:41,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-24 21:27:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2023-11-24 21:27:41,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 75 states have internal predecessors, (84), 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) [2023-11-24 21:27:41,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2023-11-24 21:27:41,970 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 35 [2023-11-24 21:27:41,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:41,970 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2023-11-24 21:27:41,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 29 states have (on average 1.9655172413793103) internal successors, (57), 31 states have internal predecessors, (57), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 21:27:41,971 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2023-11-24 21:27:41,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-24 21:27:41,972 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:41,972 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:41,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:42,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 21:27:42,173 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:42,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:42,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2068348588, now seen corresponding path program 1 times [2023-11-24 21:27:42,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:42,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670669297] [2023-11-24 21:27:42,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:42,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:42,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:42,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-24 21:27:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:42,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:27:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-24 21:27:42,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:42,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670669297] [2023-11-24 21:27:42,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670669297] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:27:42,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:27:42,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:27:42,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952606883] [2023-11-24 21:27:42,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:27:42,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:27:42,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:42,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:27:42,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:27:42,424 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:27:42,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:42,645 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2023-11-24 21:27:42,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:27:42,646 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2023-11-24 21:27:42,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:42,647 INFO L225 Difference]: With dead ends: 91 [2023-11-24 21:27:42,647 INFO L226 Difference]: Without dead ends: 91 [2023-11-24 21:27:42,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:27:42,648 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 99 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:42,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 169 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:27:42,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-24 21:27:42,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 78. [2023-11-24 21:27:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 72 states have internal predecessors, (82), 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) [2023-11-24 21:27:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2023-11-24 21:27:42,653 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 37 [2023-11-24 21:27:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:42,655 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2023-11-24 21:27:42,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-24 21:27:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2023-11-24 21:27:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-24 21:27:42,657 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:42,657 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:42,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:27:42,657 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:42,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:42,658 INFO L85 PathProgramCache]: Analyzing trace with hash 2068348589, now seen corresponding path program 1 times [2023-11-24 21:27:42,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:42,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913138543] [2023-11-24 21:27:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:42,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:43,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:43,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-24 21:27:43,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:43,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:27:43,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:27:43,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:43,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913138543] [2023-11-24 21:27:43,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913138543] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:43,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236226558] [2023-11-24 21:27:43,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:43,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:43,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:43,161 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:43,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:27:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:43,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-24 21:27:43,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:43,804 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 [2023-11-24 21:27:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:27:43,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:43,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:27:43,900 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 33 treesize of output 37 [2023-11-24 21:27:44,072 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 [2023-11-24 21:27:44,079 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 [2023-11-24 21:27:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:27:44,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236226558] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:27:44,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:27:44,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 29 [2023-11-24 21:27:44,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733181354] [2023-11-24 21:27:44,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:44,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-24 21:27:44,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:44,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-24 21:27:44,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2023-11-24 21:27:44,245 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 30 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-24 21:27:45,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:45,042 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2023-11-24 21:27:45,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 21:27:45,043 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 37 [2023-11-24 21:27:45,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:45,045 INFO L225 Difference]: With dead ends: 102 [2023-11-24 21:27:45,045 INFO L226 Difference]: Without dead ends: 102 [2023-11-24 21:27:45,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=213, Invalid=1679, Unknown=0, NotChecked=0, Total=1892 [2023-11-24 21:27:45,047 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 168 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:45,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 528 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:27:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-24 21:27:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2023-11-24 21:27:45,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 60 states have (on average 1.4) internal successors, (84), 74 states have internal predecessors, (84), 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) [2023-11-24 21:27:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2023-11-24 21:27:45,051 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 37 [2023-11-24 21:27:45,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:45,052 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2023-11-24 21:27:45,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.4814814814814814) internal successors, (67), 26 states have internal predecessors, (67), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-24 21:27:45,053 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2023-11-24 21:27:45,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-24 21:27:45,053 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:45,053 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:45,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:45,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 21:27:45,260 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:45,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:45,261 INFO L85 PathProgramCache]: Analyzing trace with hash -251012096, now seen corresponding path program 2 times [2023-11-24 21:27:45,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:45,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378969961] [2023-11-24 21:27:45,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:45,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:46,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:47,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-24 21:27:47,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:47,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:27:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:27:47,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:47,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378969961] [2023-11-24 21:27:47,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378969961] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:47,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891850320] [2023-11-24 21:27:47,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:27:47,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:47,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:47,843 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:47,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:27:48,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:27:48,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:27:48,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 113 conjunts are in the unsatisfiable core [2023-11-24 21:27:48,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:48,161 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 [2023-11-24 21:27:48,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-24 21:27:48,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-24 21:27:48,638 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-24 21:27:48,638 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 [2023-11-24 21:27:48,650 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 18 treesize of output 13 [2023-11-24 21:27:48,656 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 18 treesize of output 13 [2023-11-24 21:27:48,811 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 33 treesize of output 21 [2023-11-24 21:27:48,830 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 33 treesize of output 21 [2023-11-24 21:27:49,045 INFO L349 Elim1Store]: treesize reduction 23, result has 4.2 percent of original size [2023-11-24 21:27:49,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 37 [2023-11-24 21:27:49,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-24 21:27:49,058 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 [2023-11-24 21:27:49,331 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_10| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_10|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.offset| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$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|)))))) is different from true [2023-11-24 21:27:49,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:49,369 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2023-11-24 21:27:49,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 71 [2023-11-24 21:27:49,394 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-24 21:27:49,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-11-24 21:27:49,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2023-11-24 21:27:49,590 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 74 treesize of output 46 [2023-11-24 21:27:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-24 21:27:49,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:50,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891850320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:50,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:27:50,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 45 [2023-11-24 21:27:50,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626772819] [2023-11-24 21:27:50,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:50,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-24 21:27:50,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:50,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-24 21:27:50,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2105, Unknown=1, NotChecked=92, Total=2352 [2023-11-24 21:27:50,357 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand has 45 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 21:27:52,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:52,776 INFO L93 Difference]: Finished difference Result 105 states and 119 transitions. [2023-11-24 21:27:52,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 21:27:52,777 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 38 [2023-11-24 21:27:52,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:52,778 INFO L225 Difference]: With dead ends: 105 [2023-11-24 21:27:52,779 INFO L226 Difference]: Without dead ends: 105 [2023-11-24 21:27:52,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=315, Invalid=3848, Unknown=1, NotChecked=126, Total=4290 [2023-11-24 21:27:52,781 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 31 mSDsluCounter, 1072 mSDsCounter, 0 mSdLazyCounter, 1111 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 1221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:52,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1122 Invalid, 1221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1111 Invalid, 0 Unknown, 99 Unchecked, 1.1s Time] [2023-11-24 21:27:52,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-24 21:27:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2023-11-24 21:27:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 91 states have internal predecessors, (103), 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) [2023-11-24 21:27:52,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 113 transitions. [2023-11-24 21:27:52,786 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 113 transitions. Word has length 38 [2023-11-24 21:27:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:52,787 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 113 transitions. [2023-11-24 21:27:52,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 21:27:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 113 transitions. [2023-11-24 21:27:52,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-24 21:27:52,788 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:52,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:52,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:52,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 21:27:52,994 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:52,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:52,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2123547206, now seen corresponding path program 1 times [2023-11-24 21:27:52,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:52,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373978594] [2023-11-24 21:27:52,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:52,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:53,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:53,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-24 21:27:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:53,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:27:53,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:53,954 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:27:53,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:53,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373978594] [2023-11-24 21:27:53,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373978594] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:53,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513343103] [2023-11-24 21:27:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:53,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:53,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:53,957 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:53,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 21:27:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:54,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-24 21:27:54,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:54,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:27:54,586 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 [2023-11-24 21:27:54,594 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 12 treesize of output 4 [2023-11-24 21:27:54,781 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.base| |node_create_~temp~0#1.base|))))) (exists ((|v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_11| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_append_~head#1.base_BEFORE_CALL_11|) 0) 0))) is different from true [2023-11-24 21:27:54,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:27:54,800 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 21 treesize of output 16 [2023-11-24 21:27:54,813 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-24 21:27:54,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-24 21:27:54,951 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-24 21:27:54,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2023-11-24 21:27:55,011 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 24 treesize of output 8 [2023-11-24 21:27:55,045 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-24 21:27:55,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:27:55,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513343103] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:55,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:27:55,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37 [2023-11-24 21:27:55,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357525061] [2023-11-24 21:27:55,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:27:55,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-24 21:27:55,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:27:55,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-24 21:27:55,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1435, Unknown=1, NotChecked=76, Total=1640 [2023-11-24 21:27:55,251 INFO L87 Difference]: Start difference. First operand 100 states and 113 transitions. Second operand has 37 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 21:27:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:27:56,356 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2023-11-24 21:27:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 21:27:56,357 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (6), 3 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 42 [2023-11-24 21:27:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:27:56,358 INFO L225 Difference]: With dead ends: 100 [2023-11-24 21:27:56,358 INFO L226 Difference]: Without dead ends: 100 [2023-11-24 21:27:56,360 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=291, Invalid=2682, Unknown=1, NotChecked=106, Total=3080 [2023-11-24 21:27:56,360 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 84 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:27:56,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 972 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 735 Invalid, 0 Unknown, 80 Unchecked, 0.6s Time] [2023-11-24 21:27:56,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-24 21:27:56,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-24 21:27:56,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 91 states have internal predecessors, (101), 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) [2023-11-24 21:27:56,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2023-11-24 21:27:56,368 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 42 [2023-11-24 21:27:56,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:27:56,368 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2023-11-24 21:27:56,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 31 states have internal predecessors, (59), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-24 21:27:56,369 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2023-11-24 21:27:56,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-24 21:27:56,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:27:56,370 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:27:56,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 21:27:56,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-24 21:27:56,579 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2023-11-24 21:27:56,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:27:56,579 INFO L85 PathProgramCache]: Analyzing trace with hash -2112833834, now seen corresponding path program 1 times [2023-11-24 21:27:56,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:27:56,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737175624] [2023-11-24 21:27:56,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:56,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:27:56,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:57,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:27:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:57,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-24 21:27:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:57,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-11-24 21:27:57,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:27:57,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:27:57,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737175624] [2023-11-24 21:27:57,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737175624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:27:57,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142283674] [2023-11-24 21:27:57,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:27:57,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:27:57,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:27:57,992 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:27:57,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7db34ab6-0e64-4bdd-94d3-65fcecf36eb5/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 21:27:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:27:58,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-24 21:27:58,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:27:58,517 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:27:58,517 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 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 21:27:58,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1