./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/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_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_insert_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/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_f98d5613-8461-4383-a860-e129de6a7dd6/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 b7b415e0519ab150e9247d3d9d0133f92cfd07c34f9918f9ebd19cf8109bf4e7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:51:13,179 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:51:13,274 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-24 21:51:13,282 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:51:13,287 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:51:13,342 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:51:13,343 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:51:13,344 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:51:13,346 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:51:13,351 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:51:13,352 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:51:13,352 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:51:13,353 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:51:13,354 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:51:13,355 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:51:13,355 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:51:13,356 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:51:13,356 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:51:13,357 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:51:13,357 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:51:13,358 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:51:13,359 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:51:13,359 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:51:13,360 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:51:13,360 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:51:13,360 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:51:13,361 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:51:13,361 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:51:13,362 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:51:13,363 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:51:13,364 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:51:13,365 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:51:13,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:51:13,365 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:51:13,366 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:51:13,366 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:51:13,366 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:51:13,367 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:51:13,367 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:51:13,367 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:51:13,368 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:51:13,368 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_f98d5613-8461-4383-a860-e129de6a7dd6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b7b415e0519ab150e9247d3d9d0133f92cfd07c34f9918f9ebd19cf8109bf4e7 [2023-11-24 21:51:13,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:51:13,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:51:13,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:51:13,798 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:51:13,799 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:51:13,800 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/list-simple/sll2c_insert_unequal.i [2023-11-24 21:51:17,443 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:51:17,775 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:51:17,776 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/sv-benchmarks/c/list-simple/sll2c_insert_unequal.i [2023-11-24 21:51:17,797 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/data/daa305947/82b0989836e54b139648798221bcb2e1/FLAG1fab74863 [2023-11-24 21:51:17,837 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/data/daa305947/82b0989836e54b139648798221bcb2e1 [2023-11-24 21:51:17,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:51:17,842 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:51:17,845 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:51:17,845 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:51:17,852 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:51:17,854 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:51:17" (1/1) ... [2023-11-24 21:51:17,855 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6af600df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:17, skipping insertion in model container [2023-11-24 21:51:17,856 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:51:17" (1/1) ... [2023-11-24 21:51:17,917 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:51:18,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:51:18,320 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:51:18,382 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:51:18,427 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:51:18,428 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:18 WrapperNode [2023-11-24 21:51:18,428 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:51:18,430 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:51:18,430 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:51:18,431 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:51:18,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:18" (1/1) ... [2023-11-24 21:51:18,460 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:18" (1/1) ... [2023-11-24 21:51:18,498 INFO L138 Inliner]: procedures = 127, calls = 49, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 183 [2023-11-24 21:51:18,499 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:51:18,500 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:51:18,500 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:51:18,500 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:51:18,515 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:18" (1/1) ... [2023-11-24 21:51:18,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:18" (1/1) ... [2023-11-24 21:51:18,521 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:18" (1/1) ... [2023-11-24 21:51:18,554 INFO L175 MemorySlicer]: Split 30 memory accesses to 3 slices as follows [2, 18, 10]. 60 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 10 writes are split as follows [0, 9, 1]. [2023-11-24 21:51:18,554 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:18" (1/1) ... [2023-11-24 21:51:18,555 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:18" (1/1) ... [2023-11-24 21:51:18,570 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:18" (1/1) ... [2023-11-24 21:51:18,575 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:18" (1/1) ... [2023-11-24 21:51:18,578 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:18" (1/1) ... [2023-11-24 21:51:18,581 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:18" (1/1) ... [2023-11-24 21:51:18,586 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:51:18,588 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:51:18,588 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:51:18,588 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:51:18,589 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:18" (1/1) ... [2023-11-24 21:51:18,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:51:18,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:18,632 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:51:18,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:51:18,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:51:18,700 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:51:18,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-24 21:51:18,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:51:18,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:51:18,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-24 21:51:18,731 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-24 21:51:18,731 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-24 21:51:18,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:51:18,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:51:18,732 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:51:18,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:51:18,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-11-24 21:51:18,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2023-11-24 21:51:18,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:51:18,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-11-24 21:51:18,733 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2023-11-24 21:51:18,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:51:18,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2023-11-24 21:51:18,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2023-11-24 21:51:18,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2023-11-24 21:51:18,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:51:18,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-24 21:51:18,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-24 21:51:18,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:51:18,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:51:18,944 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:51:18,948 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:51:19,624 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:51:19,738 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:51:19,740 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-24 21:51:19,741 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:51:19 BoogieIcfgContainer [2023-11-24 21:51:19,742 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:51:19,747 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:51:19,747 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:51:19,751 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:51:19,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:51:17" (1/3) ... [2023-11-24 21:51:19,752 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50663b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:51:19, skipping insertion in model container [2023-11-24 21:51:19,752 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:51:18" (2/3) ... [2023-11-24 21:51:19,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50663b42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:51:19, skipping insertion in model container [2023-11-24 21:51:19,755 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:51:19" (3/3) ... [2023-11-24 21:51:19,756 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2c_insert_unequal.i [2023-11-24 21:51:19,781 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:51:19,781 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 62 error locations. [2023-11-24 21:51:19,858 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:51:19,867 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;@1d0b18bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:51:19,867 INFO L358 AbstractCegarLoop]: Starting to check reachability of 62 error locations. [2023-11-24 21:51:19,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 126 states, 59 states have (on average 2.3728813559322033) internal successors, (140), 121 states have internal predecessors, (140), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:19,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:51:19,882 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:19,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:51:19,885 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:19,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:19,895 INFO L85 PathProgramCache]: Analyzing trace with hash 278979000, now seen corresponding path program 1 times [2023-11-24 21:51:19,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:19,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966791892] [2023-11-24 21:51:19,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:19,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:20,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:51:20,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:20,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966791892] [2023-11-24 21:51:20,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966791892] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:20,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:20,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:51:20,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965126585] [2023-11-24 21:51:20,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:20,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:51:20,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:20,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:51:20,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:51:20,317 INFO L87 Difference]: Start difference. First operand has 126 states, 59 states have (on average 2.3728813559322033) internal successors, (140), 121 states have internal predecessors, (140), 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 21:51:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:20,482 INFO L93 Difference]: Finished difference Result 123 states and 136 transitions. [2023-11-24 21:51:20,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:51:20,485 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 21:51:20,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:20,497 INFO L225 Difference]: With dead ends: 123 [2023-11-24 21:51:20,497 INFO L226 Difference]: Without dead ends: 121 [2023-11-24 21:51:20,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:51:20,503 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 6 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:20,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 182 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:51:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-24 21:51:20,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-11-24 21:51:20,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 57 states have (on average 2.2280701754385963) internal successors, (127), 116 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:20,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 133 transitions. [2023-11-24 21:51:20,560 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 133 transitions. Word has length 5 [2023-11-24 21:51:20,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:20,561 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 133 transitions. [2023-11-24 21:51:20,561 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 21:51:20,562 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 133 transitions. [2023-11-24 21:51:20,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:51:20,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:20,563 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:51:20,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:51:20,564 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:20,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:20,564 INFO L85 PathProgramCache]: Analyzing trace with hash 278979001, now seen corresponding path program 1 times [2023-11-24 21:51:20,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:20,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135710374] [2023-11-24 21:51:20,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:20,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:51:20,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:20,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135710374] [2023-11-24 21:51:20,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135710374] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:20,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:20,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:51:20,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947091237] [2023-11-24 21:51:20,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:20,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:51:20,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:20,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:51:20,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:51:20,708 INFO L87 Difference]: Start difference. First operand 121 states and 133 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 21:51:20,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:20,837 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2023-11-24 21:51:20,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:51:20,838 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 21:51:20,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:20,840 INFO L225 Difference]: With dead ends: 119 [2023-11-24 21:51:20,840 INFO L226 Difference]: Without dead ends: 119 [2023-11-24 21:51:20,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:51:20,843 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 2 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:20,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 187 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:51:20,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-24 21:51:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-11-24 21:51:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 57 states have (on average 2.192982456140351) internal successors, (125), 114 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:20,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2023-11-24 21:51:20,857 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 5 [2023-11-24 21:51:20,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:20,857 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2023-11-24 21:51:20,858 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 21:51:20,858 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2023-11-24 21:51:20,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:51:20,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:20,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:20,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:51:20,859 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:20,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:20,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1927413840, now seen corresponding path program 1 times [2023-11-24 21:51:20,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:20,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366584300] [2023-11-24 21:51:20,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:20,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:20,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:20,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:51:21,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:21,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366584300] [2023-11-24 21:51:21,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366584300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:21,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:21,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:51:21,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440778869] [2023-11-24 21:51:21,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:21,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:51:21,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:21,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:51:21,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:51:21,056 INFO L87 Difference]: Start difference. First operand 119 states and 131 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 21:51:21,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:21,273 INFO L93 Difference]: Finished difference Result 125 states and 138 transitions. [2023-11-24 21:51:21,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:51:21,274 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 21:51:21,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:21,275 INFO L225 Difference]: With dead ends: 125 [2023-11-24 21:51:21,276 INFO L226 Difference]: Without dead ends: 125 [2023-11-24 21:51:21,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:51:21,278 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 4 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:21,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 267 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:51:21,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-24 21:51:21,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2023-11-24 21:51:21,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 58 states have (on average 2.1724137931034484) internal successors, (126), 115 states have internal predecessors, (126), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:21,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2023-11-24 21:51:21,291 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 10 [2023-11-24 21:51:21,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:21,292 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2023-11-24 21:51:21,292 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 21:51:21,292 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2023-11-24 21:51:21,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 21:51:21,293 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:21,293 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:21,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:51:21,294 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:21,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:21,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1053607865, now seen corresponding path program 1 times [2023-11-24 21:51:21,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:21,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637113485] [2023-11-24 21:51:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:21,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:21,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:21,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:21,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:21,548 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 21:51:21,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:21,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637113485] [2023-11-24 21:51:21,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637113485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:21,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:21,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:51:21,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988328935] [2023-11-24 21:51:21,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:21,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:51:21,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:21,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:51:21,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:51:21,552 INFO L87 Difference]: Start difference. First operand 120 states and 132 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 21:51:21,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:21,874 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2023-11-24 21:51:21,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:51:21,875 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 21:51:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:21,877 INFO L225 Difference]: With dead ends: 119 [2023-11-24 21:51:21,903 INFO L226 Difference]: Without dead ends: 119 [2023-11-24 21:51:21,903 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 21:51:21,904 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 3 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:21,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 408 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:51:21,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-24 21:51:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-11-24 21:51:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 58 states have (on average 2.1551724137931036) internal successors, (125), 114 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:21,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2023-11-24 21:51:21,920 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 17 [2023-11-24 21:51:21,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:21,920 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2023-11-24 21:51:21,920 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 21:51:21,921 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2023-11-24 21:51:21,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 21:51:21,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:21,921 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:21,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:51:21,922 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:21,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:21,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1053607864, now seen corresponding path program 1 times [2023-11-24 21:51:21,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:21,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029086495] [2023-11-24 21:51:21,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:21,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:22,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:22,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:22,293 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 21:51:22,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:22,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029086495] [2023-11-24 21:51:22,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029086495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:22,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:22,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:51:22,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58488595] [2023-11-24 21:51:22,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:22,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:51:22,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:22,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:51:22,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:51:22,298 INFO L87 Difference]: Start difference. First operand 119 states and 131 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 21:51:22,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:22,632 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2023-11-24 21:51:22,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:51:22,632 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 21:51:22,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:22,634 INFO L225 Difference]: With dead ends: 118 [2023-11-24 21:51:22,634 INFO L226 Difference]: Without dead ends: 118 [2023-11-24 21:51:22,634 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 21:51:22,636 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 1 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:22,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 432 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:51:22,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-24 21:51:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2023-11-24 21:51:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 58 states have (on average 2.1379310344827585) internal successors, (124), 113 states have internal predecessors, (124), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:22,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2023-11-24 21:51:22,646 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 17 [2023-11-24 21:51:22,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:22,646 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2023-11-24 21:51:22,646 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 21:51:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2023-11-24 21:51:22,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 21:51:22,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:22,648 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:22,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:51:22,649 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:22,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:22,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1095353635, now seen corresponding path program 1 times [2023-11-24 21:51:22,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:22,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473252070] [2023-11-24 21:51:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:22,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:22,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:22,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:22,994 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 21:51:22,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:22,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473252070] [2023-11-24 21:51:22,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473252070] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:22,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780210328] [2023-11-24 21:51:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:22,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:22,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:23,000 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:23,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:51:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:23,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 21:51:23,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:23,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:51:23,259 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-24 21:51:23,312 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-24 21:51:23,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-24 21:51:23,325 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 21:51:23,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:51:23,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780210328] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:23,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:51:23,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2023-11-24 21:51:23,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272082599] [2023-11-24 21:51:23,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:51:23,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:51:23,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:23,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:51:23,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-11-24 21:51:23,397 INFO L87 Difference]: Start difference. First operand 118 states and 130 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 21:51:23,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:23,786 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2023-11-24 21:51:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:51:23,787 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 21:51:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:23,788 INFO L225 Difference]: With dead ends: 117 [2023-11-24 21:51:23,788 INFO L226 Difference]: Without dead ends: 117 [2023-11-24 21:51:23,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-11-24 21:51:23,790 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 3 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:23,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 478 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 398 Invalid, 0 Unknown, 124 Unchecked, 0.3s Time] [2023-11-24 21:51:23,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-24 21:51:23,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-11-24 21:51:23,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 58 states have (on average 2.1206896551724137) internal successors, (123), 112 states have internal predecessors, (123), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:23,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 129 transitions. [2023-11-24 21:51:23,799 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 129 transitions. Word has length 19 [2023-11-24 21:51:23,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:23,799 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 129 transitions. [2023-11-24 21:51:23,799 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 21:51:23,800 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 129 transitions. [2023-11-24 21:51:23,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 21:51:23,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:23,801 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:23,807 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-24 21:51:24,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:24,007 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:24,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:24,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1095353636, now seen corresponding path program 1 times [2023-11-24 21:51:24,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:24,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100818178] [2023-11-24 21:51:24,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:24,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:24,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:24,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:24,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:24,531 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 21:51:24,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:24,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100818178] [2023-11-24 21:51:24,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100818178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:24,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257336931] [2023-11-24 21:51:24,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:24,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:24,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:24,537 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:24,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:51:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:24,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-24 21:51:24,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:24,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:51:24,892 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:51:24,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 21:51:24,898 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 21:51:24,958 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 21:51:24,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:51:25,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257336931] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:25,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:51:25,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-24 21:51:25,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338229252] [2023-11-24 21:51:25,157 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:51:25,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 21:51:25,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:25,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 21:51:25,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2023-11-24 21:51:25,159 INFO L87 Difference]: Start difference. First operand 117 states and 129 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 21:51:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:25,825 INFO L93 Difference]: Finished difference Result 118 states and 131 transitions. [2023-11-24 21:51:25,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:51:25,826 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 21:51:25,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:25,827 INFO L225 Difference]: With dead ends: 118 [2023-11-24 21:51:25,827 INFO L226 Difference]: Without dead ends: 118 [2023-11-24 21:51:25,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-11-24 21:51:25,829 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 5 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 725 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:25,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 665 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 725 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:51:25,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-24 21:51:25,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2023-11-24 21:51:25,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 58 states have (on average 2.103448275862069) internal successors, (122), 111 states have internal predecessors, (122), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:25,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2023-11-24 21:51:25,842 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 19 [2023-11-24 21:51:25,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:25,843 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2023-11-24 21:51:25,843 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 21:51:25,843 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2023-11-24 21:51:25,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 21:51:25,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:25,844 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 21:51:25,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:26,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:26,050 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:26,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:26,051 INFO L85 PathProgramCache]: Analyzing trace with hash 216743692, now seen corresponding path program 1 times [2023-11-24 21:51:26,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:26,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469135332] [2023-11-24 21:51:26,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:26,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:26,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:26,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:26,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:26,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:51:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:26,737 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 21:51:26,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:26,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469135332] [2023-11-24 21:51:26,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469135332] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:26,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185820072] [2023-11-24 21:51:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:26,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:26,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:26,740 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:26,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:51:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:26,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-24 21:51:26,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:26,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:51:27,030 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:51:27,031 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-24 21:51:27,124 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:51:27,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2023-11-24 21:51:27,296 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-11-24 21:51:27,321 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-24 21:51:27,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-24 21:51:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 8 not checked. [2023-11-24 21:51:27,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:51:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:51:28,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185820072] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:51:28,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:51:28,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 12] total 25 [2023-11-24 21:51:28,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063315156] [2023-11-24 21:51:28,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:51:28,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-24 21:51:28,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:28,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-24 21:51:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=525, Unknown=1, NotChecked=48, Total=702 [2023-11-24 21:51:28,247 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 27 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 4 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-24 21:51:28,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:28,890 INFO L93 Difference]: Finished difference Result 124 states and 137 transitions. [2023-11-24 21:51:28,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:51:28,890 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 4 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 27 [2023-11-24 21:51:28,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:28,892 INFO L225 Difference]: With dead ends: 124 [2023-11-24 21:51:28,892 INFO L226 Difference]: Without dead ends: 124 [2023-11-24 21:51:28,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=167, Invalid=648, Unknown=1, NotChecked=54, Total=870 [2023-11-24 21:51:28,893 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 628 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:28,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [628 Valid, 388 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 513 Invalid, 0 Unknown, 132 Unchecked, 0.5s Time] [2023-11-24 21:51:28,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-24 21:51:28,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2023-11-24 21:51:28,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 102 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:28,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2023-11-24 21:51:28,899 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 27 [2023-11-24 21:51:28,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:28,900 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2023-11-24 21:51:28,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 21 states have internal predecessors, (48), 4 states have call successors, (9), 3 states have call predecessors, (9), 7 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-11-24 21:51:28,900 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2023-11-24 21:51:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 21:51:28,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:28,901 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 21:51:28,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:29,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:29,102 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:29,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:29,102 INFO L85 PathProgramCache]: Analyzing trace with hash 216743693, now seen corresponding path program 1 times [2023-11-24 21:51:29,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:29,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370280851] [2023-11-24 21:51:29,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:29,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:29,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:29,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:29,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:29,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:51:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-24 21:51:29,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:29,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370280851] [2023-11-24 21:51:29,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370280851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:29,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486010087] [2023-11-24 21:51:29,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:29,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:29,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:29,915 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:29,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:51:30,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:30,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-24 21:51:30,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:30,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:51:30,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:51:30,213 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2023-11-24 21:51:30,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:51:30,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:51:30,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:51:30,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:51:30,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:51:30,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-24 21:51:30,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:51:30,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-24 21:51:30,418 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 21:51:30,418 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:51:30,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486010087] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:30,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:51:30,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2023-11-24 21:51:30,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853317135] [2023-11-24 21:51:30,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:30,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:51:30,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:30,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:51:30,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=103, Unknown=1, NotChecked=20, Total=156 [2023-11-24 21:51:30,420 INFO L87 Difference]: Start difference. First operand 107 states and 119 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 21:51:30,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:30,611 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2023-11-24 21:51:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:51:30,612 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 21:51:30,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:30,613 INFO L225 Difference]: With dead ends: 102 [2023-11-24 21:51:30,613 INFO L226 Difference]: Without dead ends: 102 [2023-11-24 21:51:30,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2023-11-24 21:51:30,614 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 30 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:30,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 247 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 171 Invalid, 0 Unknown, 135 Unchecked, 0.2s Time] [2023-11-24 21:51:30,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-24 21:51:30,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-24 21:51:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 58 states have (on average 1.8620689655172413) internal successors, (108), 97 states have internal predecessors, (108), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:30,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2023-11-24 21:51:30,619 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 27 [2023-11-24 21:51:30,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:30,619 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2023-11-24 21:51:30,619 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 21:51:30,619 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2023-11-24 21:51:30,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:51:30,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:30,629 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:30,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:30,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:30,837 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:30,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:30,837 INFO L85 PathProgramCache]: Analyzing trace with hash 2132479251, now seen corresponding path program 1 times [2023-11-24 21:51:30,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:30,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368684276] [2023-11-24 21:51:30,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:30,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:31,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:31,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:31,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:31,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:51:31,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:31,322 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 21:51:31,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:31,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368684276] [2023-11-24 21:51:31,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368684276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:31,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605592993] [2023-11-24 21:51:31,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:31,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:31,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:31,324 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:31,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:51:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:31,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-24 21:51:31,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:31,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-24 21:51:31,647 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-24 21:51:31,687 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-24 21:51:31,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2023-11-24 21:51:31,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-24 21:51:31,707 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 21:51:31,708 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:51:31,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605592993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:31,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:51:31,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2023-11-24 21:51:31,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148317805] [2023-11-24 21:51:31,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:31,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:51:31,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:31,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:51:31,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=205, Unknown=1, NotChecked=28, Total=272 [2023-11-24 21:51:31,710 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 21:51:31,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:31,923 INFO L93 Difference]: Finished difference Result 130 states and 146 transitions. [2023-11-24 21:51:31,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:51:31,924 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 29 [2023-11-24 21:51:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:31,926 INFO L225 Difference]: With dead ends: 130 [2023-11-24 21:51:31,926 INFO L226 Difference]: Without dead ends: 130 [2023-11-24 21:51:31,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 29 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 21:51:31,927 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 81 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:31,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 310 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 200 Invalid, 0 Unknown, 177 Unchecked, 0.2s Time] [2023-11-24 21:51:31,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-24 21:51:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2023-11-24 21:51:31,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 60 states have (on average 1.8666666666666667) internal successors, (112), 99 states have internal predecessors, (112), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 118 transitions. [2023-11-24 21:51:31,932 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 118 transitions. Word has length 29 [2023-11-24 21:51:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:31,933 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 118 transitions. [2023-11-24 21:51:31,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 21:51:31,933 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 118 transitions. [2023-11-24 21:51:31,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:51:31,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:31,934 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:31,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:32,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:32,135 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:32,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:32,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2132479252, now seen corresponding path program 1 times [2023-11-24 21:51:32,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:32,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002299089] [2023-11-24 21:51:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:32,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:32,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:32,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:32,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:51:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:32,844 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 21:51:32,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:32,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002299089] [2023-11-24 21:51:32,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002299089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:32,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917310798] [2023-11-24 21:51:32,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:32,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:32,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:32,846 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:32,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:51:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:33,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-24 21:51:33,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:33,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:51:33,347 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 15 treesize of output 9 [2023-11-24 21:51:33,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-24 21:51:33,408 WARN L876 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (exists ((|v_ULTIMATE.start_sll_circular_insert_~head#1.base_BEFORE_CALL_5| Int)) (<= 0 (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_circular_insert_~head#1.base_BEFORE_CALL_5|) 0)))) is different from true [2023-11-24 21:51:33,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:51:33,463 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 24 treesize of output 19 [2023-11-24 21:51:33,471 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-24 21:51:33,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-24 21:51:33,542 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 23 treesize of output 15 [2023-11-24 21:51:33,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:51:33,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-24 21:51:33,601 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 21:51:33,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:51:33,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917310798] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:33,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:51:33,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2023-11-24 21:51:33,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196821918] [2023-11-24 21:51:33,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:51:33,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 21:51:33,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:33,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 21:51:33,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=632, Unknown=1, NotChecked=50, Total=756 [2023-11-24 21:51:33,827 INFO L87 Difference]: Start difference. First operand 104 states and 118 transitions. Second operand has 25 states, 19 states have (on average 2.263157894736842) internal successors, (43), 21 states have internal predecessors, (43), 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 21:51:47,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:47,276 INFO L93 Difference]: Finished difference Result 134 states and 149 transitions. [2023-11-24 21:51:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:51:47,277 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 19 states have (on average 2.263157894736842) internal successors, (43), 21 states have internal predecessors, (43), 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 29 [2023-11-24 21:51:47,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:47,279 INFO L225 Difference]: With dead ends: 134 [2023-11-24 21:51:47,279 INFO L226 Difference]: Without dead ends: 134 [2023-11-24 21:51:47,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=163, Invalid=1319, Unknown=4, NotChecked=74, Total=1560 [2023-11-24 21:51:47,280 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 285 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 1275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:47,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 807 Invalid, 1275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1128 Invalid, 0 Unknown, 145 Unchecked, 1.0s Time] [2023-11-24 21:51:47,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-11-24 21:51:47,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 109. [2023-11-24 21:51:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 64 states have (on average 1.796875) internal successors, (115), 103 states have internal predecessors, (115), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2023-11-24 21:51:47,285 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 29 [2023-11-24 21:51:47,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:47,285 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2023-11-24 21:51:47,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 19 states have (on average 2.263157894736842) internal successors, (43), 21 states have internal predecessors, (43), 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 21:51:47,286 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2023-11-24 21:51:47,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-24 21:51:47,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:47,287 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 21:51:47,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:47,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 21:51:47,488 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:47,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:47,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1682345722, now seen corresponding path program 1 times [2023-11-24 21:51:47,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:47,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876200058] [2023-11-24 21:51:47,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:47,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:47,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:47,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:47,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:51:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:47,586 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 21:51:47,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:47,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876200058] [2023-11-24 21:51:47,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876200058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:47,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:47,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:51:47,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212941514] [2023-11-24 21:51:47,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:47,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:51:47,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:47,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:51:47,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:51:47,589 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 21:51:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:47,714 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2023-11-24 21:51:47,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:51:47,715 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-11-24 21:51:47,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:47,716 INFO L225 Difference]: With dead ends: 111 [2023-11-24 21:51:47,716 INFO L226 Difference]: Without dead ends: 111 [2023-11-24 21:51:47,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:51:47,717 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 16 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:47,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 214 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:51:47,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-24 21:51:47,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2023-11-24 21:51:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 65 states have (on average 1.7846153846153847) internal successors, (116), 104 states have internal predecessors, (116), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:47,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2023-11-24 21:51:47,721 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 30 [2023-11-24 21:51:47,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:47,721 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2023-11-24 21:51:47,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 21:51:47,722 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2023-11-24 21:51:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-24 21:51:47,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:47,723 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:51:47,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-24 21:51:47,723 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:47,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:47,723 INFO L85 PathProgramCache]: Analyzing trace with hash 613371856, now seen corresponding path program 1 times [2023-11-24 21:51:47,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:47,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861855501] [2023-11-24 21:51:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:47,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:47,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:47,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:47,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:47,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:51:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:47,951 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-24 21:51:47,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:47,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861855501] [2023-11-24 21:51:47,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861855501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:47,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740016563] [2023-11-24 21:51:47,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:47,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:47,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:47,957 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:47,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:51:48,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:48,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:51:48,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 21:51:48,208 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:51:48,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740016563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:48,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:51:48,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 7 [2023-11-24 21:51:48,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189453836] [2023-11-24 21:51:48,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:48,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:51:48,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:48,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:51:48,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:51:48,211 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 21:51:48,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:48,268 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2023-11-24 21:51:48,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:51:48,268 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 31 [2023-11-24 21:51:48,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:48,270 INFO L225 Difference]: With dead ends: 107 [2023-11-24 21:51:48,270 INFO L226 Difference]: Without dead ends: 107 [2023-11-24 21:51:48,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:51:48,273 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 142 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:48,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 167 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:51:48,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-11-24 21:51:48,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2023-11-24 21:51:48,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 64 states have (on average 1.75) internal successors, (112), 101 states have internal predecessors, (112), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:48,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 118 transitions. [2023-11-24 21:51:48,284 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 118 transitions. Word has length 31 [2023-11-24 21:51:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:48,284 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 118 transitions. [2023-11-24 21:51:48,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 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 21:51:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 118 transitions. [2023-11-24 21:51:48,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 21:51:48,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:48,287 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 21:51:48,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:48,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:48,509 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:48,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:48,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1826783259, now seen corresponding path program 1 times [2023-11-24 21:51:48,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:48,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256501985] [2023-11-24 21:51:48,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:48,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:48,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:48,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:48,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:48,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:51:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:48,698 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 21:51:48,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:48,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256501985] [2023-11-24 21:51:48,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256501985] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:48,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:48,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:51:48,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081318402] [2023-11-24 21:51:48,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:48,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:51:48,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:48,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:51:48,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:51:48,701 INFO L87 Difference]: Start difference. First operand 107 states and 118 transitions. Second operand has 7 states, 5 states have (on average 4.0) 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 21:51:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:48,954 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2023-11-24 21:51:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:51:48,955 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.0) 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 32 [2023-11-24 21:51:48,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:48,955 INFO L225 Difference]: With dead ends: 104 [2023-11-24 21:51:48,956 INFO L226 Difference]: Without dead ends: 104 [2023-11-24 21:51:48,956 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 21:51:48,957 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 21 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:48,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 325 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:51:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-24 21:51:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-11-24 21:51:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 64 states have (on average 1.703125) internal successors, (109), 98 states have internal predecessors, (109), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:48,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2023-11-24 21:51:48,961 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 32 [2023-11-24 21:51:48,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:48,961 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2023-11-24 21:51:48,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.0) 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 21:51:48,962 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2023-11-24 21:51:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 21:51:48,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:48,962 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, 1, 1] [2023-11-24 21:51:48,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:51:48,963 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:48,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:48,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1826783260, now seen corresponding path program 1 times [2023-11-24 21:51:48,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:48,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946222827] [2023-11-24 21:51:48,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:48,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:49,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:49,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:49,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:49,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:51:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:49,235 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 21:51:49,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:49,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946222827] [2023-11-24 21:51:49,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946222827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:49,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580759568] [2023-11-24 21:51:49,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:49,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:49,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:49,238 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:49,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:51:49,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:49,494 INFO L262 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-24 21:51:49,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:49,546 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 21:51:49,546 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:51:49,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580759568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:49,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:51:49,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 12 [2023-11-24 21:51:49,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450767647] [2023-11-24 21:51:49,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:49,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:51:49,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:49,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:51:49,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:51:49,549 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 21:51:49,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:49,614 INFO L93 Difference]: Finished difference Result 103 states and 113 transitions. [2023-11-24 21:51:49,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:51:49,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 32 [2023-11-24 21:51:49,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:49,616 INFO L225 Difference]: With dead ends: 103 [2023-11-24 21:51:49,616 INFO L226 Difference]: Without dead ends: 103 [2023-11-24 21:51:49,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:51:49,621 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 93 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:49,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 182 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:51:49,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-24 21:51:49,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2023-11-24 21:51:49,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 63 states have (on average 1.6984126984126984) internal successors, (107), 97 states have internal predecessors, (107), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2023-11-24 21:51:49,629 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 32 [2023-11-24 21:51:49,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:49,629 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2023-11-24 21:51:49,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 21:51:49,629 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2023-11-24 21:51:49,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 21:51:49,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:49,635 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 21:51:49,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:49,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:49,847 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:49,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:49,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1834656733, now seen corresponding path program 1 times [2023-11-24 21:51:49,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:49,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630081288] [2023-11-24 21:51:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:49,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:49,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:49,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:49,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:51:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 21:51:49,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:49,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630081288] [2023-11-24 21:51:49,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630081288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:49,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:49,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:51:49,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061888327] [2023-11-24 21:51:49,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:49,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:51:49,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:49,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:51:49,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:51:49,985 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand has 5 states, 4 states have (on average 4.5) 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), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 21:51:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:50,138 INFO L93 Difference]: Finished difference Result 102 states and 112 transitions. [2023-11-24 21:51:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:51:50,138 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) 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), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2023-11-24 21:51:50,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:50,139 INFO L225 Difference]: With dead ends: 102 [2023-11-24 21:51:50,139 INFO L226 Difference]: Without dead ends: 102 [2023-11-24 21:51:50,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:51:50,140 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 18 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:50,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 228 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:51:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-24 21:51:50,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2023-11-24 21:51:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 96 states have internal predecessors, (106), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:50,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2023-11-24 21:51:50,144 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 32 [2023-11-24 21:51:50,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:50,144 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2023-11-24 21:51:50,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) 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), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 21:51:50,144 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2023-11-24 21:51:50,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-24 21:51:50,145 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:50,145 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 21:51:50,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-24 21:51:50,145 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:50,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:50,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1834656734, now seen corresponding path program 1 times [2023-11-24 21:51:50,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:50,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465109885] [2023-11-24 21:51:50,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:50,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:50,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:50,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:50,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:50,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:51:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 21:51:50,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:50,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465109885] [2023-11-24 21:51:50,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465109885] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:50,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:50,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:51:50,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570891909] [2023-11-24 21:51:50,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:50,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:51:50,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:50,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:51:50,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:51:50,363 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 5 states, 4 states have (on average 4.5) 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), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 21:51:50,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:50,527 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2023-11-24 21:51:50,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:51:50,528 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) 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), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2023-11-24 21:51:50,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:50,529 INFO L225 Difference]: With dead ends: 101 [2023-11-24 21:51:50,529 INFO L226 Difference]: Without dead ends: 101 [2023-11-24 21:51:50,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:51:50,530 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 17 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:50,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 226 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:51:50,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-11-24 21:51:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-11-24 21:51:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 95 states have internal predecessors, (105), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:50,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2023-11-24 21:51:50,534 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 32 [2023-11-24 21:51:50,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:50,535 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2023-11-24 21:51:50,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) 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), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 21:51:50,535 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2023-11-24 21:51:50,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-24 21:51:50,535 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:50,536 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 21:51:50,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-24 21:51:50,536 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:50,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:50,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1039783903, now seen corresponding path program 1 times [2023-11-24 21:51:50,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:50,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144633845] [2023-11-24 21:51:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:50,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:50,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:50,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:50,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:50,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:51:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:51:50,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:50,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144633845] [2023-11-24 21:51:50,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144633845] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:50,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:50,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:51:50,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019518151] [2023-11-24 21:51:50,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:50,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:51:50,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:50,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:51:50,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:51:50,854 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 7 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 21:51:51,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:51,081 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2023-11-24 21:51:51,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:51:51,081 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 33 [2023-11-24 21:51:51,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:51,082 INFO L225 Difference]: With dead ends: 98 [2023-11-24 21:51:51,082 INFO L226 Difference]: Without dead ends: 98 [2023-11-24 21:51:51,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 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 21:51:51,083 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 14 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:51,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 329 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:51:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-24 21:51:51,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2023-11-24 21:51:51,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 63 states have (on average 1.619047619047619) internal successors, (102), 92 states have internal predecessors, (102), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:51,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2023-11-24 21:51:51,087 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 33 [2023-11-24 21:51:51,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:51,088 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2023-11-24 21:51:51,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 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 21:51:51,088 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2023-11-24 21:51:51,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 21:51:51,089 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:51,089 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, 1] [2023-11-24 21:51:51,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-24 21:51:51,089 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:51,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:51,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1495048160, now seen corresponding path program 1 times [2023-11-24 21:51:51,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:51,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306605948] [2023-11-24 21:51:51,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:51,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:51,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:51,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:51,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:51:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-24 21:51:51,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:51,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306605948] [2023-11-24 21:51:51,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306605948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:51:51,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:51:51,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:51:51,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630179259] [2023-11-24 21:51:51,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:51:51,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:51:51,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:51,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:51:51,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:51:51,383 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 21:51:51,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:51,569 INFO L93 Difference]: Finished difference Result 94 states and 104 transitions. [2023-11-24 21:51:51,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:51:51,569 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 35 [2023-11-24 21:51:51,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:51,570 INFO L225 Difference]: With dead ends: 94 [2023-11-24 21:51:51,570 INFO L226 Difference]: Without dead ends: 94 [2023-11-24 21:51:51,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:51:51,571 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 169 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:51,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 162 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:51:51,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-24 21:51:51,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-11-24 21:51:51,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.5555555555555556) internal successors, (98), 88 states have internal predecessors, (98), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:51,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 104 transitions. [2023-11-24 21:51:51,577 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 104 transitions. Word has length 35 [2023-11-24 21:51:51,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:51,577 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 104 transitions. [2023-11-24 21:51:51,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.2) internal successors, (21), 6 states have internal predecessors, (21), 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 21:51:51,577 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 104 transitions. [2023-11-24 21:51:51,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-24 21:51:51,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:51,578 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, 1, 1] [2023-11-24 21:51:51,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-24 21:51:51,578 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:51,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:51,579 INFO L85 PathProgramCache]: Analyzing trace with hash 898152295, now seen corresponding path program 1 times [2023-11-24 21:51:51,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:51,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628166024] [2023-11-24 21:51:51,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:51,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:51,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:51,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:51,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:51,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:51,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:51:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 21:51:51,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:51,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628166024] [2023-11-24 21:51:51,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628166024] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:51,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241374144] [2023-11-24 21:51:51,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:51,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:51,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:51,817 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:51,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:51:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:52,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-24 21:51:52,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:52,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:51:52,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-24 21:51:52,276 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-24 21:51:52,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2023-11-24 21:51:52,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-24 21:51:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 21:51:52,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:51:52,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-24 21:51:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 21:51:52,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241374144] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:51:52,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:51:52,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 21 [2023-11-24 21:51:52,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096798323] [2023-11-24 21:51:52,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:51:52,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-24 21:51:52,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:52,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-24 21:51:52,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2023-11-24 21:51:52,708 INFO L87 Difference]: Start difference. First operand 94 states and 104 transitions. Second operand has 22 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-24 21:51:53,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:51:53,515 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2023-11-24 21:51:53,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-24 21:51:53,516 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 36 [2023-11-24 21:51:53,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:51:53,517 INFO L225 Difference]: With dead ends: 155 [2023-11-24 21:51:53,517 INFO L226 Difference]: Without dead ends: 155 [2023-11-24 21:51:53,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2023-11-24 21:51:53,518 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 344 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 679 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:51:53,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 679 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:51:53,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-24 21:51:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 94. [2023-11-24 21:51:53,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.5) internal successors, (99), 88 states have internal predecessors, (99), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:51:53,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 105 transitions. [2023-11-24 21:51:53,523 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 105 transitions. Word has length 36 [2023-11-24 21:51:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:51:53,523 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 105 transitions. [2023-11-24 21:51:53,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 16 states have internal predecessors, (55), 3 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-24 21:51:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 105 transitions. [2023-11-24 21:51:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-24 21:51:53,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:51:53,524 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, 1, 1] [2023-11-24 21:51:53,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:51:53,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:53,728 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:51:53,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:51:53,729 INFO L85 PathProgramCache]: Analyzing trace with hash 898152296, now seen corresponding path program 1 times [2023-11-24 21:51:53,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:51:53,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352515030] [2023-11-24 21:51:53,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:53,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:51:53,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:54,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:51:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:54,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:51:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:54,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:51:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:54,595 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:51:54,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:51:54,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352515030] [2023-11-24 21:51:54,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352515030] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:54,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299393145] [2023-11-24 21:51:54,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:51:54,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:51:54,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:51:54,601 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:51:54,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:51:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:51:54,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 61 conjunts are in the unsatisfiable core [2023-11-24 21:51:54,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:51:54,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:51:55,213 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 15 treesize of output 9 [2023-11-24 21:51:55,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2023-11-24 21:51:55,394 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-24 21:51:55,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-24 21:51:55,414 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 24 treesize of output 19 [2023-11-24 21:51:55,816 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 23 treesize of output 15 [2023-11-24 21:51:55,824 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:51:55,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 25 [2023-11-24 21:51:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:51:55,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:51:56,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299393145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:51:56,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:51:56,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2023-11-24 21:51:56,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462606533] [2023-11-24 21:51:56,189 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:51:56,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-24 21:51:56,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:51:56,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-24 21:51:56,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1021, Unknown=0, NotChecked=0, Total=1122 [2023-11-24 21:51:56,191 INFO L87 Difference]: Start difference. First operand 94 states and 105 transitions. Second operand has 31 states, 25 states have (on average 2.28) internal successors, (57), 26 states have internal predecessors, (57), 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 21:52:00,229 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 21:52:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:02,423 INFO L93 Difference]: Finished difference Result 152 states and 170 transitions. [2023-11-24 21:52:02,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-24 21:52:02,423 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 25 states have (on average 2.28) internal successors, (57), 26 states have internal predecessors, (57), 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 36 [2023-11-24 21:52:02,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:02,425 INFO L225 Difference]: With dead ends: 152 [2023-11-24 21:52:02,425 INFO L226 Difference]: Without dead ends: 152 [2023-11-24 21:52:02,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=260, Invalid=2392, Unknown=0, NotChecked=0, Total=2652 [2023-11-24 21:52:02,428 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 322 mSDsluCounter, 1130 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 1184 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:02,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 1184 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1459 Invalid, 1 Unknown, 0 Unchecked, 5.3s Time] [2023-11-24 21:52:02,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-24 21:52:02,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 96. [2023-11-24 21:52:02,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 68 states have (on average 1.4852941176470589) internal successors, (101), 90 states have internal predecessors, (101), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:52:02,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2023-11-24 21:52:02,434 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 107 transitions. Word has length 36 [2023-11-24 21:52:02,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:02,434 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 107 transitions. [2023-11-24 21:52:02,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 25 states have (on average 2.28) internal successors, (57), 26 states have internal predecessors, (57), 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 21:52:02,435 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 107 transitions. [2023-11-24 21:52:02,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-24 21:52:02,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:02,435 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, 1, 1, 1] [2023-11-24 21:52:02,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-24 21:52:02,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:52:02,642 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:52:02,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:02,643 INFO L85 PathProgramCache]: Analyzing trace with hash 820566855, now seen corresponding path program 1 times [2023-11-24 21:52:02,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:02,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862825716] [2023-11-24 21:52:02,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:02,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:02,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:52:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:02,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:52:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:02,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:52:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:02,875 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 21:52:02,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:02,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862825716] [2023-11-24 21:52:02,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862825716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:52:02,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646255847] [2023-11-24 21:52:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:02,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:52:02,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:52:02,881 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:52:02,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 21:52:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:03,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 21:52:03,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:52:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 21:52:03,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:52:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-24 21:52:03,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646255847] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:52:03,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:52:03,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 9 [2023-11-24 21:52:03,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864553515] [2023-11-24 21:52:03,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:52:03,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:52:03,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:03,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:52:03,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:52:03,361 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 21:52:03,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:52:03,607 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2023-11-24 21:52:03,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:52:03,611 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2023-11-24 21:52:03,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:52:03,611 INFO L225 Difference]: With dead ends: 90 [2023-11-24 21:52:03,612 INFO L226 Difference]: Without dead ends: 90 [2023-11-24 21:52:03,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:52:03,612 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 11 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:52:03,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 486 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:52:03,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-24 21:52:03,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2023-11-24 21:52:03,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 64 states have (on average 1.46875) internal successors, (94), 84 states have internal predecessors, (94), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:52:03,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 100 transitions. [2023-11-24 21:52:03,616 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 100 transitions. Word has length 37 [2023-11-24 21:52:03,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:52:03,616 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 100 transitions. [2023-11-24 21:52:03,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-24 21:52:03,616 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 100 transitions. [2023-11-24 21:52:03,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-24 21:52:03,617 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:52:03,617 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, 1, 1, 1, 1] [2023-11-24 21:52:03,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 21:52:03,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:52:03,825 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 59 more)] === [2023-11-24 21:52:03,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:52:03,825 INFO L85 PathProgramCache]: Analyzing trace with hash 135658185, now seen corresponding path program 1 times [2023-11-24 21:52:03,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:52:03,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802314145] [2023-11-24 21:52:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:03,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:52:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:04,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:52:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:04,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:52:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:04,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:52:04,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:52:04,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:52:04,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802314145] [2023-11-24 21:52:04,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802314145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:52:04,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663177343] [2023-11-24 21:52:04,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:52:04,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:52:04,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:52:04,185 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:52:04,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f98d5613-8461-4383-a860-e129de6a7dd6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 21:52:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:52:04,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-24 21:52:04,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:52:04,688 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 21:52:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:52:04,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:52:04,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-24 21:52:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:52:04,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663177343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:52:04,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:52:04,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 20 [2023-11-24 21:52:04,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427809455] [2023-11-24 21:52:04,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:52:04,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 21:52:04,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:52:04,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 21:52:04,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:52:04,809 INFO L87 Difference]: Start difference. First operand 90 states and 100 transitions. Second operand has 20 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 17 states have internal predecessors, (50), 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 21:52:08,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]