./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/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_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/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 64bit --witnessprinter.graph.data.programhash f6ffaa15235a1424658c74c69505398b6d7973f6f82933a9f22a2b097e3c0057 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:29:50,240 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:29:50,307 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-24 21:29:50,313 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:29:50,313 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:29:50,338 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:29:50,339 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:29:50,340 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:29:50,341 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:29:50,341 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:29:50,342 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:29:50,342 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:29:50,343 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:29:50,344 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:29:50,345 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:29:50,345 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:29:50,346 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:29:50,346 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:29:50,347 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:29:50,348 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:29:50,348 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:29:50,356 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:29:50,356 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:29:50,357 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:29:50,357 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:29:50,358 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:29:50,358 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:29:50,359 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:29:50,360 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:29:50,360 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:29:50,361 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:29:50,361 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:29:50,362 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:29:50,362 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:29:50,363 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:29:50,363 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:29:50,364 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:29:50,364 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:29:50,365 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_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f6ffaa15235a1424658c74c69505398b6d7973f6f82933a9f22a2b097e3c0057 [2023-11-24 21:29:50,700 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:29:50,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:29:50,737 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:29:50,740 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:29:50,741 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:29:50,742 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i [2023-11-24 21:29:53,948 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:29:54,368 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:29:54,368 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/sv-benchmarks/c/memsafety-broom/sll-nested-sll-twice.i [2023-11-24 21:29:54,400 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/data/c69cce6a5/b962b58d769043a3b4ba37f8cec2503d/FLAGad62cd974 [2023-11-24 21:29:54,418 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/data/c69cce6a5/b962b58d769043a3b4ba37f8cec2503d [2023-11-24 21:29:54,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:29:54,422 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:29:54,424 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:29:54,424 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:29:54,434 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:29:54,435 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:29:54" (1/1) ... [2023-11-24 21:29:54,436 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58756c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:54, skipping insertion in model container [2023-11-24 21:29:54,436 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:29:54" (1/1) ... [2023-11-24 21:29:54,503 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:29:54,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:29:54,911 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:29:54,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:29:55,000 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:29:55,000 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:55 WrapperNode [2023-11-24 21:29:55,001 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:29:55,002 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:29:55,002 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:29:55,003 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:29:55,011 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:55" (1/1) ... [2023-11-24 21:29:55,049 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:55" (1/1) ... [2023-11-24 21:29:55,075 INFO L138 Inliner]: procedures = 122, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 81 [2023-11-24 21:29:55,075 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:29:55,076 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:29:55,076 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:29:55,076 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:29:55,087 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:55" (1/1) ... [2023-11-24 21:29:55,088 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:55" (1/1) ... [2023-11-24 21:29:55,099 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:55" (1/1) ... [2023-11-24 21:29:55,128 INFO L175 MemorySlicer]: Split 22 memory accesses to 1 slices as follows [22]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 10 writes are split as follows [10]. [2023-11-24 21:29:55,128 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:55" (1/1) ... [2023-11-24 21:29:55,128 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:55" (1/1) ... [2023-11-24 21:29:55,139 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:55" (1/1) ... [2023-11-24 21:29:55,142 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:55" (1/1) ... [2023-11-24 21:29:55,145 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:55" (1/1) ... [2023-11-24 21:29:55,146 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:55" (1/1) ... [2023-11-24 21:29:55,150 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:29:55,151 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:29:55,151 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:29:55,151 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:29:55,152 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:55" (1/1) ... [2023-11-24 21:29:55,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:29:55,173 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:29:55,193 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:29:55,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:29:55,234 INFO L130 BoogieDeclarations]: Found specification of procedure loop_internal [2023-11-24 21:29:55,234 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_internal [2023-11-24 21:29:55,235 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero_internal [2023-11-24 21:29:55,235 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero_internal [2023-11-24 21:29:55,235 INFO L130 BoogieDeclarations]: Found specification of procedure create_internal [2023-11-24 21:29:55,235 INFO L138 BoogieDeclarations]: Found implementation of procedure create_internal [2023-11-24 21:29:55,235 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_and_zero [2023-11-24 21:29:55,235 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_and_zero [2023-11-24 21:29:55,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 21:29:55,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-11-24 21:29:55,236 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_internal [2023-11-24 21:29:55,236 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_internal [2023-11-24 21:29:55,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-11-24 21:29:55,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:29:55,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:29:55,244 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:29:55,368 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:29:55,370 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:29:55,923 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:29:55,974 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:29:55,974 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-24 21:29:55,975 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:29:55 BoogieIcfgContainer [2023-11-24 21:29:55,975 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:29:55,978 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:29:55,978 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:29:55,982 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:29:55,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:29:54" (1/3) ... [2023-11-24 21:29:55,983 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2ea1c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:29:55, skipping insertion in model container [2023-11-24 21:29:55,983 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:29:55" (2/3) ... [2023-11-24 21:29:55,984 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e2ea1c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:29:55, skipping insertion in model container [2023-11-24 21:29:55,984 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:29:55" (3/3) ... [2023-11-24 21:29:55,985 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-nested-sll-twice.i [2023-11-24 21:29:56,006 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:29:56,006 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 51 error locations. [2023-11-24 21:29:56,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:29:56,065 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;@4f2459e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:29:56,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-11-24 21:29:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 105 states have internal predecessors, (117), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:29:56,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 21:29:56,076 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:29:56,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 21:29:56,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:29:56,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:56,083 INFO L85 PathProgramCache]: Analyzing trace with hash 8271905, now seen corresponding path program 1 times [2023-11-24 21:29:56,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:56,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026231150] [2023-11-24 21:29:56,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:56,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:56,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:56,302 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 21:29:56,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:56,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026231150] [2023-11-24 21:29:56,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026231150] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:29:56,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:29:56,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:29:56,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911626505] [2023-11-24 21:29:56,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:29:56,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:29:56,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:56,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:29:56,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:29:56,347 INFO L87 Difference]: Start difference. First operand has 123 states, 54 states have (on average 2.1666666666666665) internal successors, (117), 105 states have internal predecessors, (117), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 21:29:56,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:29:56,487 INFO L93 Difference]: Finished difference Result 120 states and 132 transitions. [2023-11-24 21:29:56,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:29:56,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 4 [2023-11-24 21:29:56,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:29:56,499 INFO L225 Difference]: With dead ends: 120 [2023-11-24 21:29:56,500 INFO L226 Difference]: Without dead ends: 119 [2023-11-24 21:29:56,502 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 21:29:56,506 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 6 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:29:56,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 184 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:29:56,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-11-24 21:29:56,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2023-11-24 21:29:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 54 states have (on average 1.9814814814814814) internal successors, (107), 101 states have internal predecessors, (107), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:29:56,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2023-11-24 21:29:56,558 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 4 [2023-11-24 21:29:56,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:29:56,558 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2023-11-24 21:29:56,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 21:29:56,559 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2023-11-24 21:29:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 21:29:56,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:29:56,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-24 21:29:56,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:29:56,560 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting alloc_and_zeroErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:29:56,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:56,561 INFO L85 PathProgramCache]: Analyzing trace with hash 8271906, now seen corresponding path program 1 times [2023-11-24 21:29:56,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:56,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096101430] [2023-11-24 21:29:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:56,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:56,660 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 21:29:56,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:56,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096101430] [2023-11-24 21:29:56,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096101430] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:29:56,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:29:56,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:29:56,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797028762] [2023-11-24 21:29:56,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:29:56,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:29:56,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:56,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:29:56,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:29:56,664 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 21:29:56,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:29:56,803 INFO L93 Difference]: Finished difference Result 116 states and 128 transitions. [2023-11-24 21:29:56,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:29:56,804 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 4 [2023-11-24 21:29:56,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:29:56,806 INFO L225 Difference]: With dead ends: 116 [2023-11-24 21:29:56,806 INFO L226 Difference]: Without dead ends: 116 [2023-11-24 21:29:56,807 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 21:29:56,809 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:29:56,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 189 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:29:56,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-11-24 21:29:56,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2023-11-24 21:29:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 54 states have (on average 1.9259259259259258) internal successors, (104), 98 states have internal predecessors, (104), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:29:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2023-11-24 21:29:56,836 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 4 [2023-11-24 21:29:56,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:29:56,837 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2023-11-24 21:29:56,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 21:29:56,837 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2023-11-24 21:29:56,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:29:56,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:29:56,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:56,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:29:56,839 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting alloc_and_zero_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:29:56,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:56,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1691344441, now seen corresponding path program 1 times [2023-11-24 21:29:56,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:56,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461224891] [2023-11-24 21:29:56,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:56,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:57,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:29:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:57,059 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 21:29:57,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:57,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461224891] [2023-11-24 21:29:57,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461224891] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:29:57,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:29:57,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:29:57,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943937983] [2023-11-24 21:29:57,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:29:57,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:29:57,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:57,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:29:57,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:29:57,074 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:29:57,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:29:57,412 INFO L93 Difference]: Finished difference Result 127 states and 141 transitions. [2023-11-24 21:29:57,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:29:57,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-24 21:29:57,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:29:57,422 INFO L225 Difference]: With dead ends: 127 [2023-11-24 21:29:57,422 INFO L226 Difference]: Without dead ends: 127 [2023-11-24 21:29:57,426 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 21:29:57,428 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 21 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:29:57,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 172 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:29:57,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-24 21:29:57,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 115. [2023-11-24 21:29:57,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 54 states have (on average 1.9074074074074074) internal successors, (103), 97 states have internal predecessors, (103), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:29:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2023-11-24 21:29:57,453 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 12 [2023-11-24 21:29:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:29:57,453 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2023-11-24 21:29:57,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:29:57,454 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2023-11-24 21:29:57,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:29:57,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:29:57,455 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:57,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:29:57,455 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting alloc_and_zero_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:29:57,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:57,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1691344442, now seen corresponding path program 1 times [2023-11-24 21:29:57,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:57,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945822146] [2023-11-24 21:29:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:57,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:57,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:57,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:29:57,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:57,669 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 21:29:57,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:57,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945822146] [2023-11-24 21:29:57,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945822146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:29:57,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:29:57,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:29:57,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060688907] [2023-11-24 21:29:57,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:29:57,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:29:57,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:57,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:29:57,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:29:57,672 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:29:57,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:29:57,914 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2023-11-24 21:29:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:29:57,915 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-11-24 21:29:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:29:57,916 INFO L225 Difference]: With dead ends: 126 [2023-11-24 21:29:57,916 INFO L226 Difference]: Without dead ends: 126 [2023-11-24 21:29:57,917 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 21:29:57,918 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 20 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:29:57,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 175 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:29:57,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-24 21:29:57,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 114. [2023-11-24 21:29:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 96 states have internal predecessors, (102), 12 states have call successors, (12), 5 states have call predecessors, (12), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-24 21:29:57,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2023-11-24 21:29:57,931 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 12 [2023-11-24 21:29:57,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:29:57,932 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2023-11-24 21:29:57,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-24 21:29:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2023-11-24 21:29:57,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 21:29:57,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:29:57,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:57,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:29:57,934 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:29:57,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:57,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2072795497, now seen corresponding path program 1 times [2023-11-24 21:29:57,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:57,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516561726] [2023-11-24 21:29:57,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:57,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:58,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:29:58,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:58,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-24 21:29:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:58,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:29:58,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:58,483 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 21:29:58,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:58,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516561726] [2023-11-24 21:29:58,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516561726] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:29:58,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:29:58,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-24 21:29:58,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711953793] [2023-11-24 21:29:58,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:29:58,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:29:58,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:58,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:29:58,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:29:58,487 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 10 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:29:59,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:29:59,140 INFO L93 Difference]: Finished difference Result 150 states and 171 transitions. [2023-11-24 21:29:59,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:29:59,141 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-11-24 21:29:59,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:29:59,143 INFO L225 Difference]: With dead ends: 150 [2023-11-24 21:29:59,143 INFO L226 Difference]: Without dead ends: 150 [2023-11-24 21:29:59,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-24 21:29:59,145 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 72 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:29:59,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 285 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:29:59,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-24 21:29:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 127. [2023-11-24 21:29:59,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 66 states have (on average 1.878787878787879) internal successors, (124), 104 states have internal predecessors, (124), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (17), 17 states have call predecessors, (17), 13 states have call successors, (17) [2023-11-24 21:29:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 154 transitions. [2023-11-24 21:29:59,173 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 154 transitions. Word has length 19 [2023-11-24 21:29:59,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:29:59,175 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 154 transitions. [2023-11-24 21:29:59,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-24 21:29:59,176 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 154 transitions. [2023-11-24 21:29:59,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 21:29:59,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:29:59,177 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:29:59,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:29:59,178 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:29:59,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:29:59,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2072795496, now seen corresponding path program 1 times [2023-11-24 21:29:59,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:29:59,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943047665] [2023-11-24 21:29:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:29:59,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:29:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:59,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:29:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:59,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-24 21:29:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:59,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:29:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:29:59,916 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 21:29:59,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:29:59,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943047665] [2023-11-24 21:29:59,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943047665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:29:59,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:29:59,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-24 21:29:59,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415001677] [2023-11-24 21:29:59,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:29:59,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:29:59,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:29:59,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:29:59,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:29:59,919 INFO L87 Difference]: Start difference. First operand 127 states and 154 transitions. Second operand has 11 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 1 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 21:30:00,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:30:00,639 INFO L93 Difference]: Finished difference Result 158 states and 195 transitions. [2023-11-24 21:30:00,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:30:00,640 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 19 [2023-11-24 21:30:00,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:30:00,643 INFO L225 Difference]: With dead ends: 158 [2023-11-24 21:30:00,643 INFO L226 Difference]: Without dead ends: 158 [2023-11-24 21:30:00,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-24 21:30:00,646 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 56 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:30:00,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 333 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:30:00,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-11-24 21:30:00,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 140. [2023-11-24 21:30:00,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 75 states have (on average 1.8266666666666667) internal successors, (137), 113 states have internal predecessors, (137), 17 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (24), 21 states have call predecessors, (24), 17 states have call successors, (24) [2023-11-24 21:30:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2023-11-24 21:30:00,674 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 178 transitions. Word has length 19 [2023-11-24 21:30:00,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:30:00,674 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 178 transitions. [2023-11-24 21:30:00,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 3 states have call successors, (3), 1 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 21:30:00,675 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 178 transitions. [2023-11-24 21:30:00,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 21:30:00,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:30:00,676 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:00,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:30:00,677 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting create_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:30:00,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:00,678 INFO L85 PathProgramCache]: Analyzing trace with hash 947437139, now seen corresponding path program 1 times [2023-11-24 21:30:00,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:00,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11225588] [2023-11-24 21:30:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:00,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:00,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:30:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:00,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:30:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:00,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:30:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:30:00,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:00,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11225588] [2023-11-24 21:30:00,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11225588] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:00,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399586372] [2023-11-24 21:30:00,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:00,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:00,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:00,933 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:00,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:30:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:01,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 21:30:01,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:01,151 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 21:30:01,223 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-24 21:30:01,299 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-24 21:30:01,299 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 21:30:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-24 21:30:01,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:01,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399586372] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:01,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:30:01,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-11-24 21:30:01,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035607245] [2023-11-24 21:30:01,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:01,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:30:01,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:01,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:30:01,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-11-24 21:30:01,381 INFO L87 Difference]: Start difference. First operand 140 states and 178 transitions. Second operand has 11 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 21:30:02,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:30:02,054 INFO L93 Difference]: Finished difference Result 154 states and 195 transitions. [2023-11-24 21:30:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:30:02,055 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2023-11-24 21:30:02,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:30:02,056 INFO L225 Difference]: With dead ends: 154 [2023-11-24 21:30:02,056 INFO L226 Difference]: Without dead ends: 154 [2023-11-24 21:30:02,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=166, Unknown=1, NotChecked=26, Total=240 [2023-11-24 21:30:02,057 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 34 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:30:02,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 402 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 637 Invalid, 0 Unknown, 148 Unchecked, 0.5s Time] [2023-11-24 21:30:02,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-24 21:30:02,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 141. [2023-11-24 21:30:02,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 76 states have (on average 1.8157894736842106) internal successors, (138), 113 states have internal predecessors, (138), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2023-11-24 21:30:02,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 181 transitions. [2023-11-24 21:30:02,068 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 181 transitions. Word has length 21 [2023-11-24 21:30:02,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:30:02,068 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 181 transitions. [2023-11-24 21:30:02,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-24 21:30:02,069 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 181 transitions. [2023-11-24 21:30:02,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 21:30:02,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:30:02,070 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:02,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:02,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-24 21:30:02,277 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting create_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:30:02,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:02,277 INFO L85 PathProgramCache]: Analyzing trace with hash 947437140, now seen corresponding path program 1 times [2023-11-24 21:30:02,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:02,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599214805] [2023-11-24 21:30:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:02,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:02,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:30:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:02,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:30:02,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:02,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:30:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:02,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:30:02,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:02,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599214805] [2023-11-24 21:30:02,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599214805] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:02,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759365764] [2023-11-24 21:30:02,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:02,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:02,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:02,844 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:02,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:30:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:02,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-24 21:30:02,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:03,006 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 21:30:03,195 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-24 21:30:03,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:30:03,219 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 21:30:03,228 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:30:03,228 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 21:30:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-24 21:30:03,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:03,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759365764] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:03,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:30:03,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2023-11-24 21:30:03,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239860373] [2023-11-24 21:30:03,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:03,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-24 21:30:03,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:03,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-24 21:30:03,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=229, Unknown=1, NotChecked=30, Total=306 [2023-11-24 21:30:03,374 INFO L87 Difference]: Start difference. First operand 141 states and 181 transitions. Second operand has 17 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-24 21:30:04,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:30:04,298 INFO L93 Difference]: Finished difference Result 153 states and 194 transitions. [2023-11-24 21:30:04,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:30:04,299 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 21 [2023-11-24 21:30:04,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:30:04,301 INFO L225 Difference]: With dead ends: 153 [2023-11-24 21:30:04,301 INFO L226 Difference]: Without dead ends: 153 [2023-11-24 21:30:04,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=349, Unknown=1, NotChecked=38, Total=462 [2023-11-24 21:30:04,302 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 50 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:30:04,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 460 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 887 Invalid, 0 Unknown, 147 Unchecked, 0.7s Time] [2023-11-24 21:30:04,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-24 21:30:04,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 140. [2023-11-24 21:30:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 76 states have (on average 1.7894736842105263) internal successors, (136), 112 states have internal predecessors, (136), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2023-11-24 21:30:04,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 179 transitions. [2023-11-24 21:30:04,312 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 179 transitions. Word has length 21 [2023-11-24 21:30:04,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:30:04,312 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 179 transitions. [2023-11-24 21:30:04,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 11 states have internal predecessors, (23), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-11-24 21:30:04,313 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 179 transitions. [2023-11-24 21:30:04,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 21:30:04,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:30:04,314 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:04,327 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:04,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:04,521 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:30:04,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:04,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1631406481, now seen corresponding path program 1 times [2023-11-24 21:30:04,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:04,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165659206] [2023-11-24 21:30:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:04,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:04,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:04,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:30:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:04,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-24 21:30:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:05,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:30:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:05,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-24 21:30:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 21:30:05,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:05,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165659206] [2023-11-24 21:30:05,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165659206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:05,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875337717] [2023-11-24 21:30:05,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:05,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:05,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:05,468 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:05,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:30:05,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:05,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-24 21:30:05,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:05,614 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 21:30:05,663 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-24 21:30:05,723 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2023-11-24 21:30:06,009 INFO L349 Elim1Store]: treesize reduction 104, result has 34.2 percent of original size [2023-11-24 21:30:06,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 40 treesize of output 104 [2023-11-24 21:30:06,430 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:30:06,443 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-24 21:30:06,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 12 [2023-11-24 21:30:06,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:30:06,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:30:06,485 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:30:06,496 INFO L349 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2023-11-24 21:30:06,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 1 [2023-11-24 21:30:06,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:30:06,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:30:06,517 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:30:06,535 INFO L349 Elim1Store]: treesize reduction 93, result has 1.1 percent of original size [2023-11-24 21:30:06,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 30 treesize of output 1 [2023-11-24 21:30:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-11-24 21:30:06,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:06,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875337717] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:06,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:30:06,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2023-11-24 21:30:06,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137468208] [2023-11-24 21:30:06,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:06,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-24 21:30:06,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:06,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-24 21:30:06,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=166, Unknown=2, NotChecked=54, Total=272 [2023-11-24 21:30:06,925 INFO L87 Difference]: Start difference. First operand 140 states and 179 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-24 21:30:08,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:30:08,202 INFO L93 Difference]: Finished difference Result 174 states and 222 transitions. [2023-11-24 21:30:08,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:30:08,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 27 [2023-11-24 21:30:08,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:30:08,205 INFO L225 Difference]: With dead ends: 174 [2023-11-24 21:30:08,205 INFO L226 Difference]: Without dead ends: 174 [2023-11-24 21:30:08,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=234, Unknown=2, NotChecked=66, Total=380 [2023-11-24 21:30:08,207 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 101 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 53 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 354 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:30:08,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 383 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 754 Invalid, 2 Unknown, 354 Unchecked, 1.0s Time] [2023-11-24 21:30:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-24 21:30:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 146. [2023-11-24 21:30:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 81 states have (on average 1.7654320987654322) internal successors, (143), 117 states have internal predecessors, (143), 18 states have call successors, (18), 5 states have call predecessors, (18), 7 states have return successors, (32), 23 states have call predecessors, (32), 18 states have call successors, (32) [2023-11-24 21:30:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 193 transitions. [2023-11-24 21:30:08,218 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 193 transitions. Word has length 27 [2023-11-24 21:30:08,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:30:08,219 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 193 transitions. [2023-11-24 21:30:08,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-11-24 21:30:08,219 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 193 transitions. [2023-11-24 21:30:08,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 21:30:08,220 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:30:08,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:08,233 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:08,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:08,428 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:30:08,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:08,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1631406480, now seen corresponding path program 1 times [2023-11-24 21:30:08,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:08,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50506434] [2023-11-24 21:30:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:08,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:08,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:08,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:30:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:08,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-24 21:30:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:09,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:30:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:09,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-24 21:30:09,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:30:09,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:09,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50506434] [2023-11-24 21:30:09,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50506434] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:09,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964796313] [2023-11-24 21:30:09,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:09,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:09,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:09,568 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:09,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:30:09,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:09,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-24 21:30:09,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:09,725 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 21:30:10,063 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-24 21:30:10,090 WARN L876 $PredicateComparison]: unable to prove that (exists ((create_internal_~now~0.base Int) (alloc_and_zero_internal_~pi~1.base Int)) (and (= (store (store |c_old(#length)| create_internal_~now~0.base (select |c_#length| create_internal_~now~0.base)) alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| create_internal_~now~0.base) 0) (= (select (store |c_old(#valid)| create_internal_~now~0.base 1) alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-24 21:30:10,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:30:10,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:30:10,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:30:10,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2023-11-24 21:30:10,177 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-11-24 21:30:10,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 22 [2023-11-24 21:30:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2023-11-24 21:30:10,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:10,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964796313] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:10,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:30:10,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2023-11-24 21:30:10,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266716850] [2023-11-24 21:30:10,501 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:10,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 21:30:10,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:10,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 21:30:10,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=553, Unknown=2, NotChecked=98, Total=756 [2023-11-24 21:30:10,503 INFO L87 Difference]: Start difference. First operand 146 states and 193 transitions. Second operand has 26 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-24 21:30:12,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:30:12,045 INFO L93 Difference]: Finished difference Result 186 states and 246 transitions. [2023-11-24 21:30:12,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:30:12,046 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 27 [2023-11-24 21:30:12,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:30:12,048 INFO L225 Difference]: With dead ends: 186 [2023-11-24 21:30:12,049 INFO L226 Difference]: Without dead ends: 186 [2023-11-24 21:30:12,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=737, Unknown=2, NotChecked=114, Total=992 [2023-11-24 21:30:12,050 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 78 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 1688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:30:12,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 464 Invalid, 1688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1258 Invalid, 0 Unknown, 390 Unchecked, 1.2s Time] [2023-11-24 21:30:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-11-24 21:30:12,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 143. [2023-11-24 21:30:12,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 79 states have (on average 1.7721518987341771) internal successors, (140), 115 states have internal predecessors, (140), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2023-11-24 21:30:12,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 183 transitions. [2023-11-24 21:30:12,061 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 183 transitions. Word has length 27 [2023-11-24 21:30:12,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:30:12,062 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 183 transitions. [2023-11-24 21:30:12,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 19 states have internal predecessors, (37), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2023-11-24 21:30:12,062 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 183 transitions. [2023-11-24 21:30:12,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:30:12,064 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:30:12,064 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:12,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:12,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 21:30:12,271 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting create_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:30:12,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:12,271 INFO L85 PathProgramCache]: Analyzing trace with hash -79480789, now seen corresponding path program 1 times [2023-11-24 21:30:12,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:12,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103228917] [2023-11-24 21:30:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:12,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:12,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:30:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:12,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:30:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:12,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:30:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:12,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-24 21:30:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 21:30:12,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:12,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103228917] [2023-11-24 21:30:12,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103228917] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:12,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268770255] [2023-11-24 21:30:12,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:12,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:12,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:12,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:12,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:30:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:12,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-24 21:30:12,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:12,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-24 21:30:12,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:30:12,777 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 21:30:12,805 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-24 21:30:12,827 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-24 21:30:12,828 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 21:30:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-24 21:30:12,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:12,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268770255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:12,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:30:12,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-11-24 21:30:12,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432337847] [2023-11-24 21:30:12,880 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:12,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-24 21:30:12,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:12,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-24 21:30:12,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=107, Unknown=1, NotChecked=20, Total=156 [2023-11-24 21:30:12,882 INFO L87 Difference]: Start difference. First operand 143 states and 183 transitions. Second operand has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:30:13,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:30:13,448 INFO L93 Difference]: Finished difference Result 156 states and 204 transitions. [2023-11-24 21:30:13,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:30:13,449 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2023-11-24 21:30:13,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:30:13,451 INFO L225 Difference]: With dead ends: 156 [2023-11-24 21:30:13,452 INFO L226 Difference]: Without dead ends: 156 [2023-11-24 21:30:13,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=193, Unknown=1, NotChecked=28, Total=272 [2023-11-24 21:30:13,453 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 71 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-24 21:30:13,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 379 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 556 Invalid, 0 Unknown, 145 Unchecked, 0.5s Time] [2023-11-24 21:30:13,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-11-24 21:30:13,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2023-11-24 21:30:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 79 states have (on average 1.759493670886076) internal successors, (139), 114 states have internal predecessors, (139), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2023-11-24 21:30:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 182 transitions. [2023-11-24 21:30:13,465 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 182 transitions. Word has length 29 [2023-11-24 21:30:13,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:30:13,465 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 182 transitions. [2023-11-24 21:30:13,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:30:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 182 transitions. [2023-11-24 21:30:13,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:30:13,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:30:13,470 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:13,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:13,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 21:30:13,676 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting create_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:30:13,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash -79480788, now seen corresponding path program 1 times [2023-11-24 21:30:13,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:13,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474926723] [2023-11-24 21:30:13,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:13,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:14,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:30:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:14,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:30:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:14,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:30:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:14,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-11-24 21:30:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:30:14,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:14,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474926723] [2023-11-24 21:30:14,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474926723] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:14,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775223649] [2023-11-24 21:30:14,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:14,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:14,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:14,231 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:14,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:30:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:14,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-24 21:30:14,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:14,426 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 21:30:14,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:30:14,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-24 21:30:14,561 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-11-24 21:30:14,567 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 26 treesize of output 14 [2023-11-24 21:30:14,642 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (store |c_old(#length)| alloc_and_zero_internal_~pi~1.base (select |c_#length| alloc_and_zero_internal_~pi~1.base)) |c_#length|) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-24 21:30:14,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:30:14,661 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 21:30:14,671 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:30:14,671 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 21:30:14,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-11-24 21:30:14,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:14,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775223649] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:14,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:30:14,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2023-11-24 21:30:14,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705366638] [2023-11-24 21:30:14,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:14,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-24 21:30:14,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:14,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-24 21:30:14,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=297, Unknown=1, NotChecked=34, Total=380 [2023-11-24 21:30:14,807 INFO L87 Difference]: Start difference. First operand 142 states and 182 transitions. Second operand has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 3 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-24 21:30:15,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:30:15,869 INFO L93 Difference]: Finished difference Result 155 states and 203 transitions. [2023-11-24 21:30:15,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:30:15,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 3 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 29 [2023-11-24 21:30:15,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:30:15,872 INFO L225 Difference]: With dead ends: 155 [2023-11-24 21:30:15,872 INFO L226 Difference]: Without dead ends: 155 [2023-11-24 21:30:15,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=554, Unknown=1, NotChecked=48, Total=702 [2023-11-24 21:30:15,873 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 69 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:30:15,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 546 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1067 Invalid, 0 Unknown, 145 Unchecked, 0.8s Time] [2023-11-24 21:30:15,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-24 21:30:15,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2023-11-24 21:30:15,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 113 states have internal predecessors, (138), 18 states have call successors, (18), 5 states have call predecessors, (18), 6 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2023-11-24 21:30:15,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 181 transitions. [2023-11-24 21:30:15,882 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 181 transitions. Word has length 29 [2023-11-24 21:30:15,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:30:15,882 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 181 transitions. [2023-11-24 21:30:15,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 3 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-24 21:30:15,883 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 181 transitions. [2023-11-24 21:30:15,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 21:30:15,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:30:15,884 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:15,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:16,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 21:30:16,092 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:30:16,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:16,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1913750456, now seen corresponding path program 1 times [2023-11-24 21:30:16,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:16,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067632913] [2023-11-24 21:30:16,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:16,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:16,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:30:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:16,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-24 21:30:16,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:16,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:30:16,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:16,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:30:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:16,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:30:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:16,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:30:16,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:16,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067632913] [2023-11-24 21:30:16,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067632913] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:30:16,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:30:16,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:30:16,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796873325] [2023-11-24 21:30:16,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:30:16,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:30:16,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:16,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:30:16,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:30:16,254 INFO L87 Difference]: Start difference. First operand 141 states and 181 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-24 21:30:16,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:30:16,564 INFO L93 Difference]: Finished difference Result 181 states and 235 transitions. [2023-11-24 21:30:16,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:30:16,564 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2023-11-24 21:30:16,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:30:16,566 INFO L225 Difference]: With dead ends: 181 [2023-11-24 21:30:16,566 INFO L226 Difference]: Without dead ends: 181 [2023-11-24 21:30:16,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:30:16,567 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 54 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:30:16,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 210 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:30:16,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-11-24 21:30:16,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 155. [2023-11-24 21:30:16,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 93 states have (on average 1.8064516129032258) internal successors, (168), 123 states have internal predecessors, (168), 20 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (29), 26 states have call predecessors, (29), 20 states have call successors, (29) [2023-11-24 21:30:16,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 217 transitions. [2023-11-24 21:30:16,575 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 217 transitions. Word has length 35 [2023-11-24 21:30:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:30:16,576 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 217 transitions. [2023-11-24 21:30:16,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-24 21:30:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 217 transitions. [2023-11-24 21:30:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 21:30:16,577 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:30:16,577 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:16,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-24 21:30:16,578 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:30:16,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:16,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1913750455, now seen corresponding path program 1 times [2023-11-24 21:30:16,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:16,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208296262] [2023-11-24 21:30:16,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:16,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:16,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:16,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:30:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:16,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-24 21:30:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:16,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:30:16,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:16,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:30:16,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:16,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:30:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:16,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:30:16,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:16,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208296262] [2023-11-24 21:30:16,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208296262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:30:16,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:30:16,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:30:16,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435669264] [2023-11-24 21:30:16,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:30:16,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-24 21:30:16,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:16,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-24 21:30:16,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:30:16,900 INFO L87 Difference]: Start difference. First operand 155 states and 217 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-24 21:30:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:30:17,358 INFO L93 Difference]: Finished difference Result 187 states and 244 transitions. [2023-11-24 21:30:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-24 21:30:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2023-11-24 21:30:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:30:17,360 INFO L225 Difference]: With dead ends: 187 [2023-11-24 21:30:17,361 INFO L226 Difference]: Without dead ends: 187 [2023-11-24 21:30:17,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:30:17,362 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 49 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-24 21:30:17,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 402 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-24 21:30:17,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-24 21:30:17,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 164. [2023-11-24 21:30:17,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 100 states have (on average 1.76) internal successors, (176), 130 states have internal predecessors, (176), 22 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (31), 28 states have call predecessors, (31), 22 states have call successors, (31) [2023-11-24 21:30:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 229 transitions. [2023-11-24 21:30:17,377 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 229 transitions. Word has length 35 [2023-11-24 21:30:17,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:30:17,378 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 229 transitions. [2023-11-24 21:30:17,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-24 21:30:17,379 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 229 transitions. [2023-11-24 21:30:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-24 21:30:17,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:30:17,397 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:17,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-24 21:30:17,397 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:30:17,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:17,398 INFO L85 PathProgramCache]: Analyzing trace with hash -868225860, now seen corresponding path program 1 times [2023-11-24 21:30:17,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:17,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509381032] [2023-11-24 21:30:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:17,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:17,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:30:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:17,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-24 21:30:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:17,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:30:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:17,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-11-24 21:30:17,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:17,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:30:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-24 21:30:17,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:17,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509381032] [2023-11-24 21:30:17,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509381032] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:30:17,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:30:17,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-24 21:30:17,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926704319] [2023-11-24 21:30:17,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:30:17,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:30:17,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:17,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:30:17,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:30:17,652 INFO L87 Difference]: Start difference. First operand 164 states and 229 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-24 21:30:17,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:30:17,972 INFO L93 Difference]: Finished difference Result 188 states and 255 transitions. [2023-11-24 21:30:17,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:30:17,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 37 [2023-11-24 21:30:17,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:30:17,975 INFO L225 Difference]: With dead ends: 188 [2023-11-24 21:30:17,975 INFO L226 Difference]: Without dead ends: 188 [2023-11-24 21:30:17,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:30:17,976 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 51 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:30:17,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 431 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:30:17,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-24 21:30:17,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 165. [2023-11-24 21:30:17,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 101 states have (on average 1.7326732673267327) internal successors, (175), 131 states have internal predecessors, (175), 22 states have call successors, (22), 5 states have call predecessors, (22), 6 states have return successors, (31), 28 states have call predecessors, (31), 22 states have call successors, (31) [2023-11-24 21:30:17,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 228 transitions. [2023-11-24 21:30:17,985 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 228 transitions. Word has length 37 [2023-11-24 21:30:17,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:30:17,986 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 228 transitions. [2023-11-24 21:30:17,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-24 21:30:17,986 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 228 transitions. [2023-11-24 21:30:17,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 21:30:17,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:30:17,987 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:17,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-24 21:30:17,988 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:30:17,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:17,988 INFO L85 PathProgramCache]: Analyzing trace with hash 374369863, now seen corresponding path program 2 times [2023-11-24 21:30:17,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:17,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005318051] [2023-11-24 21:30:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:17,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:18,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:18,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:30:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:18,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-24 21:30:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:19,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:30:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:19,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-24 21:30:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:19,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-24 21:30:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-24 21:30:20,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:20,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005318051] [2023-11-24 21:30:20,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005318051] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:20,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581560980] [2023-11-24 21:30:20,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:30:20,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:20,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:20,453 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:20,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:30:20,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:30:20,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:20,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-24 21:30:20,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:30:20,666 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 21:30:20,703 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1)))) is different from true [2023-11-24 21:30:20,737 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (and (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select |c_old(#valid)| alloc_and_zero_internal_~pi~1.base) 0))) is different from true [2023-11-24 21:30:20,752 WARN L876 $PredicateComparison]: unable to prove that (exists ((v_alloc_and_zero_internal_~pi~1.base_45 Int) (alloc_and_zero_internal_~pi~1.base Int)) (let ((.cse0 (store |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45 1))) (and (= |c_#valid| (store .cse0 alloc_and_zero_internal_~pi~1.base (select |c_#valid| alloc_and_zero_internal_~pi~1.base))) (= (select .cse0 alloc_and_zero_internal_~pi~1.base) 0) (= (select |c_old(#valid)| v_alloc_and_zero_internal_~pi~1.base_45) 0)))) is different from true [2023-11-24 21:30:20,792 WARN L876 $PredicateComparison]: unable to prove that (exists ((alloc_and_zero_internal_~pi~1.base Int)) (= |c_#valid| (store |c_old(#valid)| alloc_and_zero_internal_~pi~1.base 1))) is different from true [2023-11-24 21:30:21,370 INFO L349 Elim1Store]: treesize reduction 290, result has 32.7 percent of original size [2023-11-24 21:30:21,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 64 treesize of output 215 [2023-11-24 21:30:24,890 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:30:25,066 INFO L349 Elim1Store]: treesize reduction 214, result has 30.5 percent of original size [2023-11-24 21:30:25,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 16 case distinctions, treesize of input 105 treesize of output 191 [2023-11-24 21:30:25,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:30:25,970 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:30:25,976 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:30:26,020 INFO L349 Elim1Store]: treesize reduction 89, result has 24.6 percent of original size [2023-11-24 21:30:26,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 49 treesize of output 48 [2023-11-24 21:30:26,082 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:30:26,915 INFO L349 Elim1Store]: treesize reduction 2693, result has 0.0 percent of original size [2023-11-24 21:30:26,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 5 stores, 9 select indices, 9 select index equivalence classes, 3 disjoint index pairs (out of 36 index pairs), introduced 14 new quantified variables, introduced 79 case distinctions, treesize of input 203 treesize of output 1 [2023-11-24 21:30:26,996 INFO L349 Elim1Store]: treesize reduction 544, result has 0.2 percent of original size [2023-11-24 21:30:26,997 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 1 [2023-11-24 21:30:27,013 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:30:27,172 INFO L349 Elim1Store]: treesize reduction 1116, result has 0.1 percent of original size [2023-11-24 21:30:27,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 38 case distinctions, treesize of input 89 treesize of output 1 [2023-11-24 21:30:27,190 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:30:27,196 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:30:27,208 INFO L349 Elim1Store]: treesize reduction 104, result has 1.0 percent of original size [2023-11-24 21:30:27,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 1 [2023-11-24 21:30:27,225 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:30:27,367 INFO L349 Elim1Store]: treesize reduction 1136, result has 0.1 percent of original size [2023-11-24 21:30:27,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 38 case distinctions, treesize of input 106 treesize of output 1 [2023-11-24 21:30:27,447 INFO L349 Elim1Store]: treesize reduction 544, result has 0.2 percent of original size [2023-11-24 21:30:27,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 78 treesize of output 1 [2023-11-24 21:30:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 15 not checked. [2023-11-24 21:30:30,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:30:30,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581560980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:30,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-24 21:30:30,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2023-11-24 21:30:30,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705840078] [2023-11-24 21:30:30,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-24 21:30:30,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-24 21:30:30,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:30:30,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-24 21:30:30,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=363, Unknown=4, NotChecked=172, Total=650 [2023-11-24 21:30:30,406 INFO L87 Difference]: Start difference. First operand 165 states and 228 transitions. Second operand has 25 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 8 states have call successors, (10), 3 states have call predecessors, (10), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-24 21:30:35,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:30:35,128 INFO L93 Difference]: Finished difference Result 214 states and 316 transitions. [2023-11-24 21:30:35,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:30:35,129 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 8 states have call successors, (10), 3 states have call predecessors, (10), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 35 [2023-11-24 21:30:35,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:30:35,130 INFO L225 Difference]: With dead ends: 214 [2023-11-24 21:30:35,131 INFO L226 Difference]: Without dead ends: 214 [2023-11-24 21:30:35,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=165, Invalid=549, Unknown=4, NotChecked=212, Total=930 [2023-11-24 21:30:35,132 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 102 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 67 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 2179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 833 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:30:35,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 596 Invalid, 2179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1275 Invalid, 4 Unknown, 833 Unchecked, 4.2s Time] [2023-11-24 21:30:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-24 21:30:35,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 173. [2023-11-24 21:30:35,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 107 states have (on average 1.7102803738317758) internal successors, (183), 137 states have internal predecessors, (183), 23 states have call successors, (23), 5 states have call predecessors, (23), 7 states have return successors, (41), 30 states have call predecessors, (41), 23 states have call successors, (41) [2023-11-24 21:30:35,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 247 transitions. [2023-11-24 21:30:35,143 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 247 transitions. Word has length 35 [2023-11-24 21:30:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:30:35,143 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 247 transitions. [2023-11-24 21:30:35,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 8 states have call successors, (10), 3 states have call predecessors, (10), 9 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2023-11-24 21:30:35,144 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 247 transitions. [2023-11-24 21:30:35,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-24 21:30:35,144 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:30:35,144 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:30:35,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:30:35,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 21:30:35,351 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [loop_internalErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, loop_internalErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, alloc_and_zeroErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-11-24 21:30:35,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:30:35,352 INFO L85 PathProgramCache]: Analyzing trace with hash 374369864, now seen corresponding path program 2 times [2023-11-24 21:30:35,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:30:35,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213547172] [2023-11-24 21:30:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:30:35,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:30:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:35,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-24 21:30:35,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:35,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-11-24 21:30:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:36,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:30:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:36,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-11-24 21:30:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:37,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-11-24 21:30:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:30:37,966 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:30:37,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:30:37,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213547172] [2023-11-24 21:30:37,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213547172] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:30:37,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584171652] [2023-11-24 21:30:37,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:30:37,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:30:37,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:30:37,968 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:30:37,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cb337fb8-732d-4e00-8a8f-4fba8131d8d1/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:30:38,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:30:38,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:30:38,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 61 conjunts are in the unsatisfiable core