./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_prepend_equal.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_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/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_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_prepend_equal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/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_44b178a8-25df-48ff-9a38-3909d1b5e899/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 f682d6a9f9df80cf11b356f08ea6be5ab5adaf1b414fc8a476877af8610cc552 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:00:23,622 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:00:23,739 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 22:00:23,745 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:00:23,746 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 22:00:23,789 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:00:23,790 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 22:00:23,791 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 22:00:23,792 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 22:00:23,799 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 22:00:23,799 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 22:00:23,801 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 22:00:23,801 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:00:23,803 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:00:23,804 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 22:00:23,805 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:00:23,805 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:00:23,806 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:00:23,831 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:00:23,831 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:00:23,832 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:00:23,832 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:00:23,833 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:00:23,833 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:00:23,833 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 22:00:23,834 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:00:23,834 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:00:23,834 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:00:23,835 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:00:23,835 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 22:00:23,835 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 22:00:23,836 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 22:00:23,836 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:00:23,836 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:00:23,837 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:00:23,837 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 22:00:23,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:00:23,837 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 22:00:23,837 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 22:00:23,838 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 22:00:23,838 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 22:00:23,839 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_44b178a8-25df-48ff-9a38-3909d1b5e899/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f682d6a9f9df80cf11b356f08ea6be5ab5adaf1b414fc8a476877af8610cc552 [2023-11-24 22:00:24,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:00:24,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:00:24,194 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:00:24,196 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:00:24,212 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:00:24,214 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/list-simple/sll2c_prepend_equal.i [2023-11-24 22:00:27,425 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:00:27,771 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:00:27,771 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/sv-benchmarks/c/list-simple/sll2c_prepend_equal.i [2023-11-24 22:00:27,835 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/data/422b99b27/c2e189e5376a46b4a97ccbb966cfc051/FLAGc6f7601a1 [2023-11-24 22:00:27,872 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/data/422b99b27/c2e189e5376a46b4a97ccbb966cfc051 [2023-11-24 22:00:27,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:00:27,885 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:00:27,887 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:00:27,888 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:00:27,894 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:00:27,898 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:00:27" (1/1) ... [2023-11-24 22:00:27,899 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11d3b9db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:27, skipping insertion in model container [2023-11-24 22:00:27,900 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:00:27" (1/1) ... [2023-11-24 22:00:27,955 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:00:28,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:00:28,398 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:00:28,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:00:28,501 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:00:28,502 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:28 WrapperNode [2023-11-24 22:00:28,502 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:00:28,504 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:00:28,504 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:00:28,504 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:00:28,512 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:28" (1/1) ... [2023-11-24 22:00:28,548 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:28" (1/1) ... [2023-11-24 22:00:28,579 INFO L138 Inliner]: procedures = 127, calls = 44, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 149 [2023-11-24 22:00:28,579 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:00:28,580 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:00:28,580 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:00:28,581 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:00:28,592 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:28" (1/1) ... [2023-11-24 22:00:28,593 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:28" (1/1) ... [2023-11-24 22:00:28,597 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:28" (1/1) ... [2023-11-24 22:00:28,623 INFO L175 MemorySlicer]: Split 25 memory accesses to 3 slices as follows [2, 10, 13]. 52 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1, 0]. The 9 writes are split as follows [0, 2, 7]. [2023-11-24 22:00:28,623 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:28" (1/1) ... [2023-11-24 22:00:28,624 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:28" (1/1) ... [2023-11-24 22:00:28,640 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:28" (1/1) ... [2023-11-24 22:00:28,644 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:28" (1/1) ... [2023-11-24 22:00:28,648 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:28" (1/1) ... [2023-11-24 22:00:28,650 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:28" (1/1) ... [2023-11-24 22:00:28,655 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:00:28,657 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:00:28,657 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:00:28,657 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:00:28,658 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:28" (1/1) ... [2023-11-24 22:00:28,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 22:00:28,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:28,697 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 22:00:28,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 22:00:28,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 22:00:28,752 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 22:00:28,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 22:00:28,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 22:00:28,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 22:00:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 22:00:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-24 22:00:28,754 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-24 22:00:28,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 22:00:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:00:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 22:00:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 22:00:28,755 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 22:00:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 22:00:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 22:00:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 22:00:28,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 22:00:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:00:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-24 22:00:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-24 22:00:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-24 22:00:28,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 22:00:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 22:00:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 22:00:28,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:00:28,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:00:28,929 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:00:28,932 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:00:29,392 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:00:29,457 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:00:29,458 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-24 22:00:29,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:00:29 BoogieIcfgContainer [2023-11-24 22:00:29,459 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:00:29,462 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 22:00:29,462 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 22:00:29,467 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 22:00:29,467 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 10:00:27" (1/3) ... [2023-11-24 22:00:29,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b5ea618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:00:29, skipping insertion in model container [2023-11-24 22:00:29,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:00:28" (2/3) ... [2023-11-24 22:00:29,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b5ea618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 10:00:29, skipping insertion in model container [2023-11-24 22:00:29,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:00:29" (3/3) ... [2023-11-24 22:00:29,471 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_prepend_equal.i [2023-11-24 22:00:29,491 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 22:00:29,491 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 52 error locations. [2023-11-24 22:00:29,546 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 22:00:29,553 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;@237d4da9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 22:00:29,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 52 error locations. [2023-11-24 22:00:29,558 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 50 states have (on average 2.32) internal successors, (116), 102 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 22:00:29,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 22:00:29,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:29,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:00:29,566 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:00:29,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash 233264712, now seen corresponding path program 1 times [2023-11-24 22:00:29,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:29,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069477345] [2023-11-24 22:00:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:29,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:29,887 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 22:00:29,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:29,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069477345] [2023-11-24 22:00:29,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069477345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:29,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:29,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:00:29,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735345545] [2023-11-24 22:00:29,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:29,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:29,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:29,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:29,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:29,967 INFO L87 Difference]: Start difference. First operand has 107 states, 50 states have (on average 2.32) internal successors, (116), 102 states have internal predecessors, (116), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:30,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:30,178 INFO L93 Difference]: Finished difference Result 104 states and 113 transitions. [2023-11-24 22:00:30,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:30,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-24 22:00:30,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:30,190 INFO L225 Difference]: With dead ends: 104 [2023-11-24 22:00:30,191 INFO L226 Difference]: Without dead ends: 102 [2023-11-24 22:00:30,194 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 22:00:30,201 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 6 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:30,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 148 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 22:00:30,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-24 22:00:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-24 22:00:30,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 48 states have (on average 2.1666666666666665) internal successors, (104), 97 states have internal predecessors, (104), 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 22:00:30,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2023-11-24 22:00:30,247 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 5 [2023-11-24 22:00:30,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:30,248 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2023-11-24 22:00:30,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:30,248 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2023-11-24 22:00:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 22:00:30,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:30,250 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 22:00:30,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 22:00:30,251 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:00:30,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:30,252 INFO L85 PathProgramCache]: Analyzing trace with hash 233264713, now seen corresponding path program 1 times [2023-11-24 22:00:30,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:30,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684314176] [2023-11-24 22:00:30,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:30,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:30,396 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 22:00:30,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:30,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684314176] [2023-11-24 22:00:30,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684314176] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:30,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:30,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 22:00:30,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393870588] [2023-11-24 22:00:30,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:30,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 22:00:30,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:30,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 22:00:30,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 22:00:30,401 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:30,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:30,508 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2023-11-24 22:00:30,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 22:00:30,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-24 22:00:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:30,513 INFO L225 Difference]: With dead ends: 100 [2023-11-24 22:00:30,513 INFO L226 Difference]: Without dead ends: 100 [2023-11-24 22:00:30,516 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 22:00:30,518 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:30,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 153 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:00:30,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-24 22:00:30,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-24 22:00:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 48 states have (on average 2.125) internal successors, (102), 95 states have internal predecessors, (102), 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 22:00:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2023-11-24 22:00:30,547 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 5 [2023-11-24 22:00:30,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:30,548 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2023-11-24 22:00:30,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 22:00:30,549 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2023-11-24 22:00:30,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 22:00:30,550 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:30,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:30,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 22:00:30,551 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:00:30,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:30,551 INFO L85 PathProgramCache]: Analyzing trace with hash -791732290, now seen corresponding path program 1 times [2023-11-24 22:00:30,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:30,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469137303] [2023-11-24 22:00:30,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:30,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:30,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:00:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:30,772 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 22:00:30,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:30,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469137303] [2023-11-24 22:00:30,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469137303] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:30,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:30,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 22:00:30,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222139796] [2023-11-24 22:00:30,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:30,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 22:00:30,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:30,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 22:00:30,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 22:00:30,785 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 22:00:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:30,976 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2023-11-24 22:00:30,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 22:00:30,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-24 22:00:30,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:30,983 INFO L225 Difference]: With dead ends: 101 [2023-11-24 22:00:30,983 INFO L226 Difference]: Without dead ends: 101 [2023-11-24 22:00:30,989 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 22:00:30,992 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 4 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:30,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 213 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 22:00:30,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-24 22:00:31,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-11-24 22:00:31,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 96 states have internal predecessors, (103), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 22:00:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 109 transitions. [2023-11-24 22:00:31,006 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 109 transitions. Word has length 10 [2023-11-24 22:00:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:31,007 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 109 transitions. [2023-11-24 22:00:31,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 22:00:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 109 transitions. [2023-11-24 22:00:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 22:00:31,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:31,009 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:31,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 22:00:31,010 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:00:31,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:31,010 INFO L85 PathProgramCache]: Analyzing trace with hash 434569947, now seen corresponding path program 1 times [2023-11-24 22:00:31,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:31,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033074848] [2023-11-24 22:00:31,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:31,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:31,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:00:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:31,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 22:00:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:00:31,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:31,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033074848] [2023-11-24 22:00:31,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033074848] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:31,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:31,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:00:31,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33038309] [2023-11-24 22:00:31,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:31,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:00:31,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:31,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:00:31,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:00:31,205 INFO L87 Difference]: Start difference. First operand 101 states and 109 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:00:31,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:31,501 INFO L93 Difference]: Finished difference Result 100 states and 108 transitions. [2023-11-24 22:00:31,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 22:00:31,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-24 22:00:31,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:31,503 INFO L225 Difference]: With dead ends: 100 [2023-11-24 22:00:31,503 INFO L226 Difference]: Without dead ends: 100 [2023-11-24 22:00:31,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 22:00:31,505 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 3 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:31,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 327 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 22:00:31,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-24 22:00:31,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-24 22:00:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 49 states have (on average 2.0816326530612246) internal successors, (102), 95 states have internal predecessors, (102), 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 22:00:31,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2023-11-24 22:00:31,514 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 17 [2023-11-24 22:00:31,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:31,514 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2023-11-24 22:00:31,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:00:31,515 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2023-11-24 22:00:31,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 22:00:31,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:31,516 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:31,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 22:00:31,516 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:00:31,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:31,517 INFO L85 PathProgramCache]: Analyzing trace with hash 434569948, now seen corresponding path program 1 times [2023-11-24 22:00:31,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:31,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513053317] [2023-11-24 22:00:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:31,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:31,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:00:31,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:31,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 22:00:31,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:00:31,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:31,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513053317] [2023-11-24 22:00:31,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513053317] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:31,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:31,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:00:31,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153010970] [2023-11-24 22:00:31,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:31,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:00:31,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:31,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:00:31,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:00:31,926 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:00:32,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:32,217 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2023-11-24 22:00:32,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 22:00:32,217 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2023-11-24 22:00:32,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:32,219 INFO L225 Difference]: With dead ends: 99 [2023-11-24 22:00:32,219 INFO L226 Difference]: Without dead ends: 99 [2023-11-24 22:00:32,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 22:00:32,221 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 1 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:32,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 351 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 22:00:32,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-24 22:00:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2023-11-24 22:00:32,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 49 states have (on average 2.061224489795918) internal successors, (101), 94 states have internal predecessors, (101), 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 22:00:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 107 transitions. [2023-11-24 22:00:32,239 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 107 transitions. Word has length 17 [2023-11-24 22:00:32,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:32,240 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 107 transitions. [2023-11-24 22:00:32,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-24 22:00:32,240 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 107 transitions. [2023-11-24 22:00:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 22:00:32,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:32,244 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:32,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 22:00:32,246 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:00:32,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:32,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1010083920, now seen corresponding path program 1 times [2023-11-24 22:00:32,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:32,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662037470] [2023-11-24 22:00:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:32,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:32,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:00:32,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:32,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 22:00:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:32,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 22:00:32,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:32,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662037470] [2023-11-24 22:00:32,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662037470] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:32,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656091215] [2023-11-24 22:00:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:32,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:32,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:32,732 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:32,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 22:00:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:32,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 22:00:32,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:32,958 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 22:00:33,023 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 22:00:33,086 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-24 22:00:33,086 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 22:00:33,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-11-24 22:00:33,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:00:33,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656091215] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:33,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:00:33,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2023-11-24 22:00:33,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813325170] [2023-11-24 22:00:33,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:00:33,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 22:00:33,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:33,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 22:00:33,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-11-24 22:00:33,223 INFO L87 Difference]: Start difference. First operand 99 states and 107 transitions. Second operand has 11 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 22:00:33,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:33,628 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2023-11-24 22:00:33,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 22:00:33,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-11-24 22:00:33,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:33,630 INFO L225 Difference]: With dead ends: 98 [2023-11-24 22:00:33,630 INFO L226 Difference]: Without dead ends: 98 [2023-11-24 22:00:33,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-11-24 22:00:33,632 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 3 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:33,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 427 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 386 Invalid, 0 Unknown, 101 Unchecked, 0.3s Time] [2023-11-24 22:00:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-24 22:00:33,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-11-24 22:00:33,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 49 states have (on average 2.0408163265306123) internal successors, (100), 93 states have internal predecessors, (100), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 22:00:33,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2023-11-24 22:00:33,639 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 19 [2023-11-24 22:00:33,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:33,639 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2023-11-24 22:00:33,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 22:00:33,640 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2023-11-24 22:00:33,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 22:00:33,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:33,641 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:33,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:33,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:33,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:00:33,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:33,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1010083921, now seen corresponding path program 1 times [2023-11-24 22:00:33,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:33,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279627242] [2023-11-24 22:00:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:33,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:33,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:34,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:00:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:34,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 22:00:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:00:34,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:34,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279627242] [2023-11-24 22:00:34,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279627242] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:34,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134675074] [2023-11-24 22:00:34,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:34,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:34,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:34,494 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:34,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 22:00:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:34,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-24 22:00:34,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:34,696 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 22:00:34,984 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 22:00:34,984 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 22:00:34,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-24 22:00:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:00:35,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:00:35,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134675074] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:35,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:00:35,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-24 22:00:35,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576430811] [2023-11-24 22:00:35,244 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:00:35,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 22:00:35,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:35,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 22:00:35,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2023-11-24 22:00:35,247 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 19 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-24 22:00:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:36,058 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2023-11-24 22:00:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 22:00:36,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 19 [2023-11-24 22:00:36,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:36,059 INFO L225 Difference]: With dead ends: 99 [2023-11-24 22:00:36,060 INFO L226 Difference]: Without dead ends: 99 [2023-11-24 22:00:36,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-11-24 22:00:36,061 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 5 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:36,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 616 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 22:00:36,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-24 22:00:36,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2023-11-24 22:00:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 49 states have (on average 2.020408163265306) internal successors, (99), 92 states have internal predecessors, (99), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 22:00:36,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 105 transitions. [2023-11-24 22:00:36,101 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 105 transitions. Word has length 19 [2023-11-24 22:00:36,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:36,102 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 105 transitions. [2023-11-24 22:00:36,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-24 22:00:36,102 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 105 transitions. [2023-11-24 22:00:36,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 22:00:36,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:36,103 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:36,125 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 22:00:36,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:36,314 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:00:36,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:36,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1861334165, now seen corresponding path program 1 times [2023-11-24 22:00:36,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:36,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718522100] [2023-11-24 22:00:36,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:36,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:36,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:00:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:36,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 22:00:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:36,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:00:36,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 22:00:37,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:37,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718522100] [2023-11-24 22:00:37,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718522100] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:37,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015356124] [2023-11-24 22:00:37,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:37,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:37,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:37,030 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:37,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 22:00:37,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:37,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-24 22:00:37,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:37,235 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 22:00:37,249 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 22:00:37,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:00:37,339 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 22:00:37,414 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 22:00:37,426 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2023-11-24 22:00:37,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:00:37,466 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 22:00:37,562 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 22:00:37,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:00:37,601 INFO L349 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2023-11-24 22:00:37,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2023-11-24 22:00:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 12 not checked. [2023-11-24 22:00:37,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:00:37,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015356124] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:37,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:00:37,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2023-11-24 22:00:37,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295611322] [2023-11-24 22:00:37,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:00:37,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 22:00:37,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:37,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 22:00:37,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=280, Unknown=2, NotChecked=70, Total=420 [2023-11-24 22:00:37,909 INFO L87 Difference]: Start difference. First operand 97 states and 105 transitions. Second operand has 18 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-24 22:00:38,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:38,556 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2023-11-24 22:00:38,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 22:00:38,557 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 27 [2023-11-24 22:00:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:38,558 INFO L225 Difference]: With dead ends: 105 [2023-11-24 22:00:38,558 INFO L226 Difference]: Without dead ends: 105 [2023-11-24 22:00:38,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=376, Unknown=2, NotChecked=82, Total=552 [2023-11-24 22:00:38,560 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 186 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:38,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 305 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 471 Invalid, 0 Unknown, 218 Unchecked, 0.5s Time] [2023-11-24 22:00:38,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-24 22:00:38,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2023-11-24 22:00:38,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 49 states have (on average 1.836734693877551) internal successors, (90), 83 states have internal predecessors, (90), 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 22:00:38,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2023-11-24 22:00:38,566 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 27 [2023-11-24 22:00:38,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:38,566 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2023-11-24 22:00:38,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 4 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-24 22:00:38,567 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2023-11-24 22:00:38,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 22:00:38,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:38,568 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:38,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:38,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:38,769 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:00:38,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1861334164, now seen corresponding path program 1 times [2023-11-24 22:00:38,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:38,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16944236] [2023-11-24 22:00:38,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:38,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:38,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:39,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:00:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:39,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 22:00:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:39,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:00:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 22:00:39,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:39,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16944236] [2023-11-24 22:00:39,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16944236] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:39,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090010858] [2023-11-24 22:00:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:39,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:39,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:39,554 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:39,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 22:00:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:39,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-24 22:00:39,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:39,798 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 22:00:39,831 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 22:00:39,853 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 22:00:39,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:00:39,925 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 22:00:39,965 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 22:00:40,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:00:40,031 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 22:00:40,115 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 22:00:40,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:00:40,170 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 22:00:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 22:00:40,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:00:40,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090010858] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:40,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:00:40,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2023-11-24 22:00:40,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9109235] [2023-11-24 22:00:40,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:40,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:00:40,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:40,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:00:40,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=170, Unknown=1, NotChecked=26, Total=240 [2023-11-24 22:00:40,187 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 22:00:40,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:40,363 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2023-11-24 22:00:40,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 22:00:40,364 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2023-11-24 22:00:40,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:40,367 INFO L225 Difference]: With dead ends: 82 [2023-11-24 22:00:40,367 INFO L226 Difference]: Without dead ends: 82 [2023-11-24 22:00:40,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=195, Unknown=1, NotChecked=28, Total=272 [2023-11-24 22:00:40,370 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 26 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:40,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 187 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 135 Invalid, 0 Unknown, 111 Unchecked, 0.1s Time] [2023-11-24 22:00:40,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-24 22:00:40,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-11-24 22:00:40,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 77 states have internal predecessors, (84), 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 22:00:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 90 transitions. [2023-11-24 22:00:40,377 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 90 transitions. Word has length 27 [2023-11-24 22:00:40,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:40,378 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 90 transitions. [2023-11-24 22:00:40,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 22:00:40,378 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 90 transitions. [2023-11-24 22:00:40,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 22:00:40,380 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:40,380 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:40,386 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-24 22:00:40,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:40,586 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:00:40,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:40,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1316655134, now seen corresponding path program 1 times [2023-11-24 22:00:40,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:40,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118920856] [2023-11-24 22:00:40,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:40,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:40,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:00:40,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:40,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 22:00:40,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:40,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:00:40,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 22:00:40,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:40,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118920856] [2023-11-24 22:00:40,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118920856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:40,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 22:00:40,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 22:00:40,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674550865] [2023-11-24 22:00:40,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:40,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 22:00:40,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:40,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 22:00:40,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 22:00:40,758 INFO L87 Difference]: Start difference. First operand 82 states and 90 transitions. Second operand has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 22:00:40,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:40,953 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2023-11-24 22:00:40,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 22:00:40,953 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-11-24 22:00:40,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:40,954 INFO L225 Difference]: With dead ends: 80 [2023-11-24 22:00:40,954 INFO L226 Difference]: Without dead ends: 80 [2023-11-24 22:00:40,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-24 22:00:40,955 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 22 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:40,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 251 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 22:00:40,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-24 22:00:40,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2023-11-24 22:00:40,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 75 states have internal predecessors, (82), 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 22:00:40,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2023-11-24 22:00:40,960 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 30 [2023-11-24 22:00:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:40,961 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2023-11-24 22:00:40,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 22:00:40,961 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2023-11-24 22:00:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 22:00:40,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:40,962 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:40,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 22:00:40,962 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:00:40,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:40,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1316655135, now seen corresponding path program 1 times [2023-11-24 22:00:40,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:40,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073638943] [2023-11-24 22:00:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:40,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:41,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:00:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:41,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 22:00:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:41,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:00:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 22:00:41,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:41,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073638943] [2023-11-24 22:00:41,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073638943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:41,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695566598] [2023-11-24 22:00:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:41,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:41,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:41,231 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:41,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 22:00:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:41,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 22:00:41,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:41,472 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 22:00:41,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 22:00:41,571 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:00:41,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695566598] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:41,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:00:41,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2023-11-24 22:00:41,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913019529] [2023-11-24 22:00:41,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:41,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:00:41,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:41,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:00:41,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2023-11-24 22:00:41,573 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 6 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 22:00:41,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:41,736 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2023-11-24 22:00:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 22:00:41,737 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-11-24 22:00:41,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:41,738 INFO L225 Difference]: With dead ends: 78 [2023-11-24 22:00:41,738 INFO L226 Difference]: Without dead ends: 78 [2023-11-24 22:00:41,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2023-11-24 22:00:41,739 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 19 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:41,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 234 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 22:00:41,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-24 22:00:41,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-11-24 22:00:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 49 states have (on average 1.6326530612244898) internal successors, (80), 73 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 22:00:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2023-11-24 22:00:41,743 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 30 [2023-11-24 22:00:41,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:41,743 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2023-11-24 22:00:41,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 22:00:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2023-11-24 22:00:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 22:00:41,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:41,745 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:41,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:41,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:41,953 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:00:41,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:41,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1316668384, now seen corresponding path program 1 times [2023-11-24 22:00:41,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:41,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680097938] [2023-11-24 22:00:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:41,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:42,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:00:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:42,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 22:00:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:42,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:00:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:00:42,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:42,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680097938] [2023-11-24 22:00:42,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680097938] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:42,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431487925] [2023-11-24 22:00:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:42,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:42,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:42,383 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:42,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 22:00:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:42,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-24 22:00:42,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:42,694 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 22:00:42,728 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 22:00:42,785 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-24 22:00:42,786 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 22:00:42,807 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 17 treesize of output 9 [2023-11-24 22:00:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-24 22:00:42,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:00:42,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431487925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:42,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:00:42,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2023-11-24 22:00:42,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337340501] [2023-11-24 22:00:42,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:42,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 22:00:42,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:42,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 22:00:42,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=205, Unknown=1, NotChecked=28, Total=272 [2023-11-24 22:00:42,814 INFO L87 Difference]: Start difference. First operand 78 states and 86 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, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 22:00:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:43,035 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2023-11-24 22:00:43,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 22:00:43,036 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, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-11-24 22:00:43,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:43,038 INFO L225 Difference]: With dead ends: 79 [2023-11-24 22:00:43,038 INFO L226 Difference]: Without dead ends: 79 [2023-11-24 22:00:43,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=261, Unknown=1, NotChecked=32, Total=342 [2023-11-24 22:00:43,039 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 26 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:43,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 252 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 184 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2023-11-24 22:00:43,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-24 22:00:43,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-11-24 22:00:43,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 50 states have (on average 1.6) 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 22:00:43,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-11-24 22:00:43,043 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 30 [2023-11-24 22:00:43,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:43,044 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-11-24 22:00:43,044 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, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-24 22:00:43,044 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-11-24 22:00:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 22:00:43,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:43,052 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:43,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:43,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:43,259 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:00:43,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:43,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1316668385, now seen corresponding path program 1 times [2023-11-24 22:00:43,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:43,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694558984] [2023-11-24 22:00:43,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:43,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:43,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:43,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:00:43,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:43,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 22:00:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:43,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:00:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:00:43,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:43,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694558984] [2023-11-24 22:00:43,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694558984] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:43,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419194720] [2023-11-24 22:00:43,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:43,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:43,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:43,951 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:43,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 22:00:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:44,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-24 22:00:44,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:44,454 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 22:00:44,458 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 22:00:44,505 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_circular_prepend_~head#1.base_BEFORE_CALL_5| Int)) (= 0 (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_BEFORE_CALL_5|) 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 22:00:44,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:00:44,545 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 22:00:44,562 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-24 22:00:44,562 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 22:00:44,654 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 22:00:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-11-24 22:00:44,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:00:44,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419194720] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:44,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:00:44,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2023-11-24 22:00:44,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084003298] [2023-11-24 22:00:44,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:00:44,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 22:00:44,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:44,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 22:00:44,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=631, Unknown=1, NotChecked=50, Total=756 [2023-11-24 22:00:44,902 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 25 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 21 states have internal predecessors, (45), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-24 22:00:45,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:45,958 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2023-11-24 22:00:45,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 22:00:45,959 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 21 states have internal predecessors, (45), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 30 [2023-11-24 22:00:45,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:45,960 INFO L225 Difference]: With dead ends: 90 [2023-11-24 22:00:45,960 INFO L226 Difference]: Without dead ends: 90 [2023-11-24 22:00:45,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=164, Invalid=1321, Unknown=1, NotChecked=74, Total=1560 [2023-11-24 22:00:45,962 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 125 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:45,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 640 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 757 Invalid, 0 Unknown, 95 Unchecked, 0.6s Time] [2023-11-24 22:00:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-24 22:00:45,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2023-11-24 22:00:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 83 states have internal predecessors, (91), 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 22:00:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2023-11-24 22:00:45,966 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 30 [2023-11-24 22:00:45,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:45,967 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2023-11-24 22:00:45,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 21 states have internal predecessors, (45), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-24 22:00:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2023-11-24 22:00:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 22:00:45,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:45,968 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:45,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:46,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:46,168 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:00:46,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:46,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1709766752, now seen corresponding path program 1 times [2023-11-24 22:00:46,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:46,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234203947] [2023-11-24 22:00:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:46,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:46,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:00:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:46,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 22:00:46,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:46,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:00:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:46,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 22:00:46,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:46,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234203947] [2023-11-24 22:00:46,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234203947] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:46,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604514160] [2023-11-24 22:00:46,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:46,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:46,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:46,585 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:46,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 22:00:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:46,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-24 22:00:46,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:46,838 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 22:00:46,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 22:00:46,887 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 22:00:46,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:00:46,915 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 22:00:46,939 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 22:00:46,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:00:46,981 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 22:00:47,023 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 22:00:47,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:00:47,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 22:00:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 22:00:47,090 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 22:00:47,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604514160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 22:00:47,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 22:00:47,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 14 [2023-11-24 22:00:47,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729576667] [2023-11-24 22:00:47,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 22:00:47,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 22:00:47,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:47,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 22:00:47,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=132, Unknown=1, NotChecked=22, Total=182 [2023-11-24 22:00:47,093 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 22:00:47,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:00:47,191 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2023-11-24 22:00:47,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 22:00:47,192 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2023-11-24 22:00:47,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:00:47,193 INFO L225 Difference]: With dead ends: 86 [2023-11-24 22:00:47,193 INFO L226 Difference]: Without dead ends: 86 [2023-11-24 22:00:47,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=132, Unknown=1, NotChecked=22, Total=182 [2023-11-24 22:00:47,194 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 55 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 22:00:47,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 120 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 99 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2023-11-24 22:00:47,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-11-24 22:00:47,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2023-11-24 22:00:47,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 61 states have (on average 1.4426229508196722) internal successors, (88), 80 states have internal predecessors, (88), 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 22:00:47,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 94 transitions. [2023-11-24 22:00:47,200 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 94 transitions. Word has length 32 [2023-11-24 22:00:47,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:00:47,200 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 94 transitions. [2023-11-24 22:00:47,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 22:00:47,201 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 94 transitions. [2023-11-24 22:00:47,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-24 22:00:47,204 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:00:47,205 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:00:47,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 22:00:47,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:47,411 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:00:47,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:00:47,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1463157820, now seen corresponding path program 1 times [2023-11-24 22:00:47,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:00:47,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067254415] [2023-11-24 22:00:47,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:47,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:00:47,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:47,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:00:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:47,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 22:00:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:47,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:00:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:47,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 22:00:47,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:00:47,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067254415] [2023-11-24 22:00:47,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067254415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:00:47,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937882480] [2023-11-24 22:00:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:00:47,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:00:47,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:00:47,764 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:00:47,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 22:00:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:00:48,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-24 22:00:48,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:00:48,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-24 22:00:48,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:00:48,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:00:48,250 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 22:00:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 22:00:48,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937882480] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 22:00:48,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 22:00:48,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 9] total 18 [2023-11-24 22:00:48,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651863384] [2023-11-24 22:00:48,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 22:00:48,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-24 22:00:48,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:00:48,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-24 22:00:48,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-11-24 22:00:48,286 INFO L87 Difference]: Start difference. First operand 86 states and 94 transitions. Second operand has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 15 states have internal predecessors, (42), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-24 22:00:52,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 22:00:56,306 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 22:01:00,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 22:01:04,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 22:01:08,410 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 22:01:12,611 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 22:01:16,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 22:01:20,760 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-24 22:01:20,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 22:01:20,760 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2023-11-24 22:01:20,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 22:01:20,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 15 states have internal predecessors, (42), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 33 [2023-11-24 22:01:20,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 22:01:20,762 INFO L225 Difference]: With dead ends: 87 [2023-11-24 22:01:20,762 INFO L226 Difference]: Without dead ends: 87 [2023-11-24 22:01:20,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2023-11-24 22:01:20,763 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 103 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.3s IncrementalHoareTripleChecker+Time [2023-11-24 22:01:20,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 568 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 8 Unknown, 0 Unchecked, 32.3s Time] [2023-11-24 22:01:20,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-24 22:01:20,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2023-11-24 22:01:20,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 78 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 22:01:20,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2023-11-24 22:01:20,767 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 33 [2023-11-24 22:01:20,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 22:01:20,767 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2023-11-24 22:01:20,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 15 states have internal predecessors, (42), 5 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-24 22:01:20,768 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2023-11-24 22:01:20,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-24 22:01:20,768 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 22:01:20,768 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 22:01:20,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 22:01:20,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 22:01:20,978 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 49 more)] === [2023-11-24 22:01:20,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:01:20,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1237464813, now seen corresponding path program 1 times [2023-11-24 22:01:20,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 22:01:20,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403616068] [2023-11-24 22:01:20,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:20,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:01:21,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:21,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 22:01:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:21,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 22:01:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:21,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 22:01:21,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:22,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 22:01:22,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 22:01:22,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403616068] [2023-11-24 22:01:22,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403616068] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:01:22,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849088434] [2023-11-24 22:01:22,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 22:01:22,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 22:01:22,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 22:01:22,081 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 22:01:22,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_44b178a8-25df-48ff-9a38-3909d1b5e899/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 22:01:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:01:22,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-24 22:01:22,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 22:01:22,361 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 22:01:22,587 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-24 22:01:22,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-24 22:01:22,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-24 22:01:22,815 INFO L349 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2023-11-24 22:01:22,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 41 [2023-11-24 22:01:22,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2023-11-24 22:01:22,913 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 22:01:23,126 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_circular_prepend_~head#1.base_BEFORE_CALL_8| Int)) (<= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_sll_circular_prepend_~head#1.base_BEFORE_CALL_8|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#memory_$Pointer$#2.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#2.base| |node_create_~temp~0#1.base|)) |c_#memory_$Pointer$#2.base|) (= |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 22:01:23,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 22:01:23,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 27 [2023-11-24 22:01:23,178 INFO L349 Elim1Store]: treesize reduction 76, result has 36.1 percent of original size [2023-11-24 22:01:23,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 52 [2023-11-24 22:01:23,293 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2023-11-24 22:01:23,296 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 15 treesize of output 7 [2023-11-24 22:01:23,426 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 22:01:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-24 22:01:23,478 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 22:01:23,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849088434] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 22:01:23,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 22:01:23,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 36 [2023-11-24 22:01:23,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9615795] [2023-11-24 22:01:23,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 22:01:23,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-24 22:01:23,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 22:01:23,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-24 22:01:23,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1354, Unknown=1, NotChecked=74, Total=1560 [2023-11-24 22:01:23,694 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 37 states, 29 states have (on average 1.896551724137931) internal successors, (55), 30 states have internal predecessors, (55), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)