./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 583b66b9d59d34de12ff7e58a8eb24a95055476e3f5044dc2a7c6b2bb83f4c67 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:48:00,758 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:48:00,837 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:48:00,842 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:48:00,843 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:48:00,868 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:48:00,869 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:48:00,870 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:48:00,870 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:48:00,871 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:48:00,872 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:48:00,873 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:48:00,873 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:48:00,874 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:48:00,874 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:48:00,875 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:48:00,875 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:48:00,876 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:48:00,877 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:48:00,877 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:48:00,878 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:48:00,881 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:48:00,881 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:48:00,882 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:48:00,882 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:48:00,882 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:48:00,883 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:48:00,883 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:48:00,885 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:48:00,886 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:48:00,886 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:48:00,887 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:48:00,887 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:48:00,888 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:48:00,888 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:48:00,889 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:48:00,889 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:48:00,889 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:48:00,890 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_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 583b66b9d59d34de12ff7e58a8eb24a95055476e3f5044dc2a7c6b2bb83f4c67 [2023-11-19 07:48:01,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:48:01,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:48:01,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:48:01,237 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:48:01,238 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:48:01,239 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2023-11-19 07:48:04,508 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:48:04,878 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:48:04,879 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2023-11-19 07:48:04,897 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/data/0ca15c62d/a72a5dcaa2ce4bf19dce86e538fd59cf/FLAGfa4ee3f30 [2023-11-19 07:48:04,912 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/data/0ca15c62d/a72a5dcaa2ce4bf19dce86e538fd59cf [2023-11-19 07:48:04,915 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:48:04,917 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:48:04,918 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:04,918 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:48:04,924 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:48:04,925 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:04" (1/1) ... [2023-11-19 07:48:04,926 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72f21b58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:04, skipping insertion in model container [2023-11-19 07:48:04,927 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:48:04" (1/1) ... [2023-11-19 07:48:04,977 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:48:05,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:05,340 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:48:05,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:48:05,457 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:48:05,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05 WrapperNode [2023-11-19 07:48:05,458 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:48:05,459 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:05,459 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:48:05,459 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:48:05,467 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,483 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,514 INFO L138 Inliner]: procedures = 127, calls = 50, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 155 [2023-11-19 07:48:05,514 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:48:05,515 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:48:05,515 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:48:05,516 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:48:05,527 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,527 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,534 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,535 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,548 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,553 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,556 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,558 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,562 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:48:05,563 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:48:05,564 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:48:05,564 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:48:05,565 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (1/1) ... [2023-11-19 07:48:05,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:48:05,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:05,599 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:48:05,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:48:05,655 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:48:05,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:48:05,657 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-19 07:48:05,658 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-19 07:48:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 07:48:05,658 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:48:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:48:05,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 07:48:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 07:48:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:48:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 07:48:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:48:05,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:48:05,661 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:48:05,856 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:48:05,864 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:48:06,362 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:48:06,372 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:48:06,372 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:48:06,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:06 BoogieIcfgContainer [2023-11-19 07:48:06,377 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:48:06,379 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:48:06,380 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:48:06,383 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:48:06,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:48:04" (1/3) ... [2023-11-19 07:48:06,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ea3def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:06, skipping insertion in model container [2023-11-19 07:48:06,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:48:05" (2/3) ... [2023-11-19 07:48:06,385 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ea3def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:48:06, skipping insertion in model container [2023-11-19 07:48:06,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:48:06" (3/3) ... [2023-11-19 07:48:06,387 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_unequal.i [2023-11-19 07:48:06,408 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:48:06,409 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2023-11-19 07:48:06,461 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:48:06,466 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;@37915dcc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:48:06,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2023-11-19 07:48:06,471 INFO L276 IsEmpty]: Start isEmpty. Operand has 142 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 137 states have internal predecessors, (151), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 07:48:06,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:06,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:48:06,479 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:06,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:06,485 INFO L85 PathProgramCache]: Analyzing trace with hash 895949618, now seen corresponding path program 1 times [2023-11-19 07:48:06,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:06,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292658043] [2023-11-19 07:48:06,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:06,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:06,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:06,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:06,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292658043] [2023-11-19 07:48:06,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292658043] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:06,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:06,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:06,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238262491] [2023-11-19 07:48:06,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:06,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:06,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:06,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:06,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:06,989 INFO L87 Difference]: Start difference. First operand has 142 states, 73 states have (on average 2.0684931506849313) internal successors, (151), 137 states have internal predecessors, (151), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:07,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:07,197 INFO L93 Difference]: Finished difference Result 138 states and 148 transitions. [2023-11-19 07:48:07,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:07,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-19 07:48:07,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:07,209 INFO L225 Difference]: With dead ends: 138 [2023-11-19 07:48:07,209 INFO L226 Difference]: Without dead ends: 135 [2023-11-19 07:48:07,211 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 [2023-11-19 07:48:07,214 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 10 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:07,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 213 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:48:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-19 07:48:07,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-11-19 07:48:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 70 states have (on average 1.9714285714285715) internal successors, (138), 130 states have internal predecessors, (138), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:07,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 144 transitions. [2023-11-19 07:48:07,263 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 144 transitions. Word has length 6 [2023-11-19 07:48:07,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:07,263 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 144 transitions. [2023-11-19 07:48:07,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:07,264 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 144 transitions. [2023-11-19 07:48:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 07:48:07,264 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:07,265 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:48:07,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:48:07,265 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:07,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:07,266 INFO L85 PathProgramCache]: Analyzing trace with hash 895949619, now seen corresponding path program 1 times [2023-11-19 07:48:07,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:07,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809518662] [2023-11-19 07:48:07,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:07,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:07,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:07,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809518662] [2023-11-19 07:48:07,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809518662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:07,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:07,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:48:07,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611611089] [2023-11-19 07:48:07,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:07,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:48:07,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:07,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:48:07,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:48:07,402 INFO L87 Difference]: Start difference. First operand 135 states and 144 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:07,511 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2023-11-19 07:48:07,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:48:07,511 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-19 07:48:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:07,513 INFO L225 Difference]: With dead ends: 132 [2023-11-19 07:48:07,513 INFO L226 Difference]: Without dead ends: 132 [2023-11-19 07:48:07,514 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 [2023-11-19 07:48:07,515 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 5 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:07,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 215 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:48:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-19 07:48:07,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-19 07:48:07,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 70 states have (on average 1.9285714285714286) internal successors, (135), 127 states have internal predecessors, (135), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:07,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2023-11-19 07:48:07,528 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 6 [2023-11-19 07:48:07,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:07,528 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2023-11-19 07:48:07,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:48:07,529 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2023-11-19 07:48:07,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 07:48:07,529 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:07,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:07,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:48:07,530 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:07,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:07,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1271068585, now seen corresponding path program 1 times [2023-11-19 07:48:07,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:07,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868126032] [2023-11-19 07:48:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:07,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:07,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:48:07,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:07,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868126032] [2023-11-19 07:48:07,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868126032] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:07,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:07,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:48:07,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043295129] [2023-11-19 07:48:07,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:07,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:48:07,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:07,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:48:07,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:48:07,701 INFO L87 Difference]: Start difference. First operand 132 states and 141 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:48:07,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:07,855 INFO L93 Difference]: Finished difference Result 143 states and 154 transitions. [2023-11-19 07:48:07,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:48:07,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-11-19 07:48:07,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:07,857 INFO L225 Difference]: With dead ends: 143 [2023-11-19 07:48:07,857 INFO L226 Difference]: Without dead ends: 143 [2023-11-19 07:48:07,858 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:48:07,859 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 10 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:07,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 319 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:48:07,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-19 07:48:07,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2023-11-19 07:48:07,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 71 states have (on average 1.9154929577464788) internal successors, (136), 128 states have internal predecessors, (136), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:07,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 142 transitions. [2023-11-19 07:48:07,899 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 142 transitions. Word has length 14 [2023-11-19 07:48:07,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:07,900 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 142 transitions. [2023-11-19 07:48:07,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 07:48:07,900 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 142 transitions. [2023-11-19 07:48:07,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 07:48:07,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:07,901 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:07,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:48:07,902 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:07,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:07,903 INFO L85 PathProgramCache]: Analyzing trace with hash -29197696, now seen corresponding path program 1 times [2023-11-19 07:48:07,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:07,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926855635] [2023-11-19 07:48:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:07,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:07,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:08,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:08,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:48:08,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:08,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926855635] [2023-11-19 07:48:08,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926855635] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:08,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:08,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:48:08,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850865654] [2023-11-19 07:48:08,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:08,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:48:08,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:08,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:48:08,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:48:08,142 INFO L87 Difference]: Start difference. First operand 133 states and 142 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:08,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:08,470 INFO L93 Difference]: Finished difference Result 132 states and 141 transitions. [2023-11-19 07:48:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:48:08,471 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-11-19 07:48:08,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:08,472 INFO L225 Difference]: With dead ends: 132 [2023-11-19 07:48:08,473 INFO L226 Difference]: Without dead ends: 132 [2023-11-19 07:48:08,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:48:08,474 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 10 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:08,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 448 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:48:08,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-19 07:48:08,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-11-19 07:48:08,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 71 states have (on average 1.9014084507042253) internal successors, (135), 127 states have internal predecessors, (135), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:08,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2023-11-19 07:48:08,484 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 24 [2023-11-19 07:48:08,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:08,485 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2023-11-19 07:48:08,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:08,485 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2023-11-19 07:48:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 07:48:08,486 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:08,487 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:08,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:48:08,487 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:08,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:08,488 INFO L85 PathProgramCache]: Analyzing trace with hash -29197695, now seen corresponding path program 1 times [2023-11-19 07:48:08,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:08,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661785636] [2023-11-19 07:48:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:08,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:08,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:08,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:08,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:08,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:48:08,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:08,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661785636] [2023-11-19 07:48:08,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661785636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:08,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:08,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:48:08,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403027093] [2023-11-19 07:48:08,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:08,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:48:08,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:08,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:48:08,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:48:08,885 INFO L87 Difference]: Start difference. First operand 132 states and 141 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:09,202 INFO L93 Difference]: Finished difference Result 131 states and 140 transitions. [2023-11-19 07:48:09,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:48:09,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-11-19 07:48:09,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:09,203 INFO L225 Difference]: With dead ends: 131 [2023-11-19 07:48:09,204 INFO L226 Difference]: Without dead ends: 131 [2023-11-19 07:48:09,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:48:09,205 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 8 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:09,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 472 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:48:09,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-19 07:48:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2023-11-19 07:48:09,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 71 states have (on average 1.8873239436619718) internal successors, (134), 126 states have internal predecessors, (134), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 140 transitions. [2023-11-19 07:48:09,214 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 140 transitions. Word has length 24 [2023-11-19 07:48:09,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:09,214 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 140 transitions. [2023-11-19 07:48:09,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:09,215 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 140 transitions. [2023-11-19 07:48:09,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 07:48:09,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:09,216 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:09,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:48:09,216 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:09,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:09,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2005784929, now seen corresponding path program 1 times [2023-11-19 07:48:09,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:09,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774176492] [2023-11-19 07:48:09,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:09,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:09,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:09,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:09,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:09,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:48:09,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:09,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774176492] [2023-11-19 07:48:09,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774176492] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:09,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176957087] [2023-11-19 07:48:09,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:09,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:09,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:09,596 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:09,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:48:09,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:09,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:48:09,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:09,802 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 [2023-11-19 07:48:09,893 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-19 07:48:10,011 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-19 07:48:10,011 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 [2023-11-19 07:48:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-11-19 07:48:10,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:10,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176957087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:10,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:48:10,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2023-11-19 07:48:10,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143968551] [2023-11-19 07:48:10,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:10,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:48:10,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:10,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:48:10,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-11-19 07:48:10,119 INFO L87 Difference]: Start difference. First operand 131 states and 140 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:48:10,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:10,585 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2023-11-19 07:48:10,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:48:10,586 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-11-19 07:48:10,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:10,587 INFO L225 Difference]: With dead ends: 138 [2023-11-19 07:48:10,588 INFO L226 Difference]: Without dead ends: 138 [2023-11-19 07:48:10,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-11-19 07:48:10,589 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 8 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 517 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:10,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 517 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 439 Invalid, 0 Unknown, 142 Unchecked, 0.4s Time] [2023-11-19 07:48:10,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-19 07:48:10,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2023-11-19 07:48:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8666666666666667) internal successors, (140), 130 states have internal predecessors, (140), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:48:10,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2023-11-19 07:48:10,608 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 26 [2023-11-19 07:48:10,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:10,608 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2023-11-19 07:48:10,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:48:10,609 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2023-11-19 07:48:10,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 07:48:10,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:10,610 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:10,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:10,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:48:10,831 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:10,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:10,831 INFO L85 PathProgramCache]: Analyzing trace with hash 2005784930, now seen corresponding path program 1 times [2023-11-19 07:48:10,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:10,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919730202] [2023-11-19 07:48:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:10,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:11,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:11,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:48:11,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:11,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919730202] [2023-11-19 07:48:11,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919730202] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:11,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099009942] [2023-11-19 07:48:11,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:11,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:11,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:11,320 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:11,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:48:11,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:11,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-19 07:48:11,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:11,485 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 [2023-11-19 07:48:11,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:48:11,692 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-19 07:48:11,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:48:11,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 07:48:11,777 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:48:11,777 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 [2023-11-19 07:48:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-11-19 07:48:11,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:11,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099009942] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:11,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:48:11,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-19 07:48:11,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115676094] [2023-11-19 07:48:11,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:11,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:48:11,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:11,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:48:11,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=232, Unknown=1, NotChecked=30, Total=306 [2023-11-19 07:48:11,979 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 07:48:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:12,627 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2023-11-19 07:48:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:48:12,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2023-11-19 07:48:12,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:12,629 INFO L225 Difference]: With dead ends: 138 [2023-11-19 07:48:12,629 INFO L226 Difference]: Without dead ends: 138 [2023-11-19 07:48:12,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=354, Unknown=1, NotChecked=38, Total=462 [2023-11-19 07:48:12,630 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 10 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:12,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 633 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 611 Invalid, 0 Unknown, 142 Unchecked, 0.5s Time] [2023-11-19 07:48:12,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-19 07:48:12,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2023-11-19 07:48:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 130 states have internal predecessors, (139), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:48:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2023-11-19 07:48:12,645 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 26 [2023-11-19 07:48:12,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:12,645 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2023-11-19 07:48:12,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 12 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 07:48:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2023-11-19 07:48:12,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 07:48:12,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:12,648 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:12,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:12,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:48:12,849 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:12,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:12,850 INFO L85 PathProgramCache]: Analyzing trace with hash -880845001, now seen corresponding path program 1 times [2023-11-19 07:48:12,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:12,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713109794] [2023-11-19 07:48:12,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:12,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:12,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:12,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:13,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:13,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:13,041 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:48:13,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:13,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713109794] [2023-11-19 07:48:13,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713109794] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:13,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246900672] [2023-11-19 07:48:13,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:13,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:13,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:13,044 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:13,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:48:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:13,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:48:13,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:13,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:48:13,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:13,263 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:48:13,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246900672] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:48:13,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:48:13,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2023-11-19 07:48:13,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296433580] [2023-11-19 07:48:13,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:13,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:48:13,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:13,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:48:13,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:48:13,266 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:48:13,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:13,463 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2023-11-19 07:48:13,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:48:13,463 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-11-19 07:48:13,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:13,465 INFO L225 Difference]: With dead ends: 137 [2023-11-19 07:48:13,465 INFO L226 Difference]: Without dead ends: 137 [2023-11-19 07:48:13,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:48:13,466 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 4 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:13,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 675 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:48:13,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-19 07:48:13,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2023-11-19 07:48:13,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.84) internal successors, (138), 130 states have internal predecessors, (138), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:48:13,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 146 transitions. [2023-11-19 07:48:13,471 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 146 transitions. Word has length 28 [2023-11-19 07:48:13,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:13,472 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 146 transitions. [2023-11-19 07:48:13,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-19 07:48:13,472 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 146 transitions. [2023-11-19 07:48:13,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 07:48:13,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:13,473 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:13,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:13,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:13,674 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:13,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:13,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1541171918, now seen corresponding path program 1 times [2023-11-19 07:48:13,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:13,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011384871] [2023-11-19 07:48:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:13,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:13,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:13,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:48:13,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:13,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011384871] [2023-11-19 07:48:13,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011384871] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:13,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614432264] [2023-11-19 07:48:13,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:13,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:13,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:13,833 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:13,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:48:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:14,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 07:48:14,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:14,015 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 [2023-11-19 07:48:14,081 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-19 07:48:14,143 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-19 07:48:14,144 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 [2023-11-19 07:48:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2023-11-19 07:48:14,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:14,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614432264] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:14,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:48:14,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2023-11-19 07:48:14,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476914283] [2023-11-19 07:48:14,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:14,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:48:14,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:14,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:48:14,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=89, Unknown=1, NotChecked=18, Total=132 [2023-11-19 07:48:14,225 INFO L87 Difference]: Start difference. First operand 136 states and 146 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 07:48:14,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:14,664 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2023-11-19 07:48:14,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:48:14,665 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2023-11-19 07:48:14,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:14,666 INFO L225 Difference]: With dead ends: 137 [2023-11-19 07:48:14,666 INFO L226 Difference]: Without dead ends: 137 [2023-11-19 07:48:14,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=169, Unknown=1, NotChecked=26, Total=240 [2023-11-19 07:48:14,667 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 17 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:14,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 553 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 516 Invalid, 0 Unknown, 140 Unchecked, 0.4s Time] [2023-11-19 07:48:14,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-19 07:48:14,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2023-11-19 07:48:14,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 75 states have (on average 1.8266666666666667) internal successors, (137), 129 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-19 07:48:14,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 145 transitions. [2023-11-19 07:48:14,672 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 145 transitions. Word has length 29 [2023-11-19 07:48:14,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:14,673 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 145 transitions. [2023-11-19 07:48:14,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 8 states have internal predecessors, (38), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 07:48:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 145 transitions. [2023-11-19 07:48:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 07:48:14,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:14,675 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:14,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:14,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:14,876 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:14,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:14,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1541171917, now seen corresponding path program 1 times [2023-11-19 07:48:14,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:14,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621334595] [2023-11-19 07:48:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:14,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:15,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:15,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:48:15,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:15,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621334595] [2023-11-19 07:48:15,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621334595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:15,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615098915] [2023-11-19 07:48:15,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:15,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:15,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:15,134 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:15,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:48:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:15,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 07:48:15,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:15,311 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 [2023-11-19 07:48:15,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:48:15,487 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-19 07:48:15,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:48:15,536 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 07:48:15,548 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-19 07:48:15,548 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 [2023-11-19 07:48:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-11-19 07:48:15,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:15,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615098915] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:15,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:48:15,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2023-11-19 07:48:15,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123558805] [2023-11-19 07:48:15,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:15,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:48:15,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:15,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:48:15,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=230, Unknown=1, NotChecked=30, Total=306 [2023-11-19 07:48:15,716 INFO L87 Difference]: Start difference. First operand 135 states and 145 transitions. Second operand has 16 states, 15 states have (on average 3.2) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 07:48:16,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:16,247 INFO L93 Difference]: Finished difference Result 154 states and 169 transitions. [2023-11-19 07:48:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:48:16,247 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2023-11-19 07:48:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:16,250 INFO L225 Difference]: With dead ends: 154 [2023-11-19 07:48:16,250 INFO L226 Difference]: Without dead ends: 154 [2023-11-19 07:48:16,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=350, Unknown=1, NotChecked=38, Total=462 [2023-11-19 07:48:16,252 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 23 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 956 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:16,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 956 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 547 Invalid, 0 Unknown, 162 Unchecked, 0.4s Time] [2023-11-19 07:48:16,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-19 07:48:16,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 145. [2023-11-19 07:48:16,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 84 states have (on average 1.7976190476190477) internal successors, (151), 138 states have internal predecessors, (151), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:48:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2023-11-19 07:48:16,265 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 29 [2023-11-19 07:48:16,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:16,266 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2023-11-19 07:48:16,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.2) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 07:48:16,266 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2023-11-19 07:48:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 07:48:16,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:16,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:16,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:16,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:48:16,484 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:16,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:16,485 INFO L85 PathProgramCache]: Analyzing trace with hash -531689197, now seen corresponding path program 1 times [2023-11-19 07:48:16,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:16,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75882731] [2023-11-19 07:48:16,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:16,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:16,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:16,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:16,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:48:16,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:16,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75882731] [2023-11-19 07:48:16,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75882731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:16,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:16,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:48:16,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238581484] [2023-11-19 07:48:16,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:16,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:48:16,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:16,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:48:16,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:48:16,655 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:17,058 INFO L93 Difference]: Finished difference Result 146 states and 162 transitions. [2023-11-19 07:48:17,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:48:17,059 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-11-19 07:48:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:17,060 INFO L225 Difference]: With dead ends: 146 [2023-11-19 07:48:17,060 INFO L226 Difference]: Without dead ends: 146 [2023-11-19 07:48:17,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:48:17,061 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 11 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:17,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 503 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:48:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-19 07:48:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2023-11-19 07:48:17,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 84 states have (on average 1.7857142857142858) internal successors, (150), 137 states have internal predecessors, (150), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:48:17,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 160 transitions. [2023-11-19 07:48:17,067 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 160 transitions. Word has length 30 [2023-11-19 07:48:17,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:17,067 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 160 transitions. [2023-11-19 07:48:17,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:17,067 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 160 transitions. [2023-11-19 07:48:17,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 07:48:17,068 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:17,068 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:17,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-19 07:48:17,069 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:17,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:17,069 INFO L85 PathProgramCache]: Analyzing trace with hash -531689196, now seen corresponding path program 1 times [2023-11-19 07:48:17,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:17,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780281387] [2023-11-19 07:48:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:17,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:17,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:17,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:17,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:17,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:17,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:48:17,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:17,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780281387] [2023-11-19 07:48:17,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780281387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:17,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:17,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-19 07:48:17,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676695100] [2023-11-19 07:48:17,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:17,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:48:17,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:17,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:48:17,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:48:17,480 INFO L87 Difference]: Start difference. First operand 144 states and 160 transitions. Second operand has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:17,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:17,842 INFO L93 Difference]: Finished difference Result 143 states and 159 transitions. [2023-11-19 07:48:17,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:48:17,843 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2023-11-19 07:48:17,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:17,844 INFO L225 Difference]: With dead ends: 143 [2023-11-19 07:48:17,844 INFO L226 Difference]: Without dead ends: 143 [2023-11-19 07:48:17,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:48:17,845 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 12 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:17,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 651 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:48:17,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-11-19 07:48:17,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2023-11-19 07:48:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 84 states have (on average 1.7738095238095237) internal successors, (149), 136 states have internal predecessors, (149), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:48:17,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 159 transitions. [2023-11-19 07:48:17,851 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 159 transitions. Word has length 30 [2023-11-19 07:48:17,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:17,851 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 159 transitions. [2023-11-19 07:48:17,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-19 07:48:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 159 transitions. [2023-11-19 07:48:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 07:48:17,854 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:17,854 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:17,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-19 07:48:17,855 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:17,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:17,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1880683964, now seen corresponding path program 1 times [2023-11-19 07:48:17,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:17,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001075032] [2023-11-19 07:48:17,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:17,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:17,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:18,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:18,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:18,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-19 07:48:18,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 07:48:18,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:18,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001075032] [2023-11-19 07:48:18,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001075032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:18,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640236530] [2023-11-19 07:48:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:18,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:18,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:18,058 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:18,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:48:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:18,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:48:18,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:48:18,304 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:18,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640236530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:18,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:48:18,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-11-19 07:48:18,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147927163] [2023-11-19 07:48:18,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:18,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:48:18,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:18,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:48:18,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:48:18,306 INFO L87 Difference]: Start difference. First operand 143 states and 159 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:48:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:18,321 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2023-11-19 07:48:18,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:48:18,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2023-11-19 07:48:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:18,323 INFO L225 Difference]: With dead ends: 125 [2023-11-19 07:48:18,323 INFO L226 Difference]: Without dead ends: 125 [2023-11-19 07:48:18,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:48:18,324 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:18,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 251 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:48:18,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-19 07:48:18,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-11-19 07:48:18,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 71 states have (on average 1.7746478873239437) internal successors, (126), 120 states have internal predecessors, (126), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:18,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 132 transitions. [2023-11-19 07:48:18,329 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 132 transitions. Word has length 41 [2023-11-19 07:48:18,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:18,330 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 132 transitions. [2023-11-19 07:48:18,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:48:18,330 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 132 transitions. [2023-11-19 07:48:18,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 07:48:18,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:18,331 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:18,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:18,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:18,553 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:18,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:18,553 INFO L85 PathProgramCache]: Analyzing trace with hash -837194340, now seen corresponding path program 1 times [2023-11-19 07:48:18,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:18,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990697140] [2023-11-19 07:48:18,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:18,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:18,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:19,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:19,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-19 07:48:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-19 07:48:19,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:19,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990697140] [2023-11-19 07:48:19,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990697140] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:19,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060281416] [2023-11-19 07:48:19,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:19,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:19,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:19,143 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:19,168 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:48:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:19,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-19 07:48:19,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:19,379 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 [2023-11-19 07:48:19,388 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 07:48:19,405 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2023-11-19 07:48:19,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:48:19,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 07:48:19,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 07:48:19,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:48:19,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 07:48:19,538 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2023-11-19 07:48:19,573 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-19 07:48:19,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-19 07:48:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 14 not checked. [2023-11-19 07:48:19,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:48:19,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060281416] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:19,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:48:19,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12 [2023-11-19 07:48:19,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927467650] [2023-11-19 07:48:19,766 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:48:19,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:48:19,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:19,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:48:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=121, Unknown=2, NotChecked=46, Total=210 [2023-11-19 07:48:19,768 INFO L87 Difference]: Start difference. First operand 125 states and 132 transitions. Second operand has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:48:20,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:20,159 INFO L93 Difference]: Finished difference Result 135 states and 143 transitions. [2023-11-19 07:48:20,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:48:20,160 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2023-11-19 07:48:20,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:20,162 INFO L225 Difference]: With dead ends: 135 [2023-11-19 07:48:20,162 INFO L226 Difference]: Without dead ends: 135 [2023-11-19 07:48:20,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=162, Unknown=2, NotChecked=54, Total=272 [2023-11-19 07:48:20,163 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 143 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:20,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 277 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 349 Invalid, 0 Unknown, 272 Unchecked, 0.3s Time] [2023-11-19 07:48:20,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-19 07:48:20,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 117. [2023-11-19 07:48:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 71 states have (on average 1.6619718309859155) internal successors, (118), 112 states have internal predecessors, (118), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:20,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 124 transitions. [2023-11-19 07:48:20,167 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 124 transitions. Word has length 43 [2023-11-19 07:48:20,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:20,168 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 124 transitions. [2023-11-19 07:48:20,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-19 07:48:20,168 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 124 transitions. [2023-11-19 07:48:20,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 07:48:20,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:20,173 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:20,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:20,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-19 07:48:20,384 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:20,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:20,385 INFO L85 PathProgramCache]: Analyzing trace with hash -837194339, now seen corresponding path program 1 times [2023-11-19 07:48:20,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:20,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58447206] [2023-11-19 07:48:20,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:20,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:20,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:20,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:21,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:21,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-19 07:48:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:21,177 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 07:48:21,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:21,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58447206] [2023-11-19 07:48:21,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58447206] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:21,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247900249] [2023-11-19 07:48:21,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:21,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:21,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:21,180 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:21,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:48:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:21,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-19 07:48:21,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:21,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:48:21,459 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 07:48:21,476 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2023-11-19 07:48:21,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:48:21,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 07:48:21,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 07:48:21,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:48:21,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 07:48:21,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-19 07:48:21,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:48:21,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-19 07:48:21,731 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-19 07:48:21,732 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:21,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247900249] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:21,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:48:21,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2023-11-19 07:48:21,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840290033] [2023-11-19 07:48:21,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:21,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:48:21,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:21,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:48:21,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=103, Unknown=1, NotChecked=20, Total=156 [2023-11-19 07:48:21,734 INFO L87 Difference]: Start difference. First operand 117 states and 124 transitions. Second operand has 7 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:48:21,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:21,939 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2023-11-19 07:48:21,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:48:21,939 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2023-11-19 07:48:21,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:21,940 INFO L225 Difference]: With dead ends: 112 [2023-11-19 07:48:21,941 INFO L226 Difference]: Without dead ends: 112 [2023-11-19 07:48:21,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2023-11-19 07:48:21,941 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 32 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:21,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 305 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 198 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2023-11-19 07:48:21,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-11-19 07:48:21,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-11-19 07:48:21,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 71 states have (on average 1.591549295774648) internal successors, (113), 107 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 119 transitions. [2023-11-19 07:48:21,945 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 119 transitions. Word has length 43 [2023-11-19 07:48:21,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:21,946 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 119 transitions. [2023-11-19 07:48:21,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:48:21,946 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 119 transitions. [2023-11-19 07:48:21,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 07:48:21,946 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:21,947 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:21,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:48:22,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:48:22,164 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:22,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:22,165 INFO L85 PathProgramCache]: Analyzing trace with hash 18522841, now seen corresponding path program 1 times [2023-11-19 07:48:22,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:22,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736245416] [2023-11-19 07:48:22,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:22,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:22,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:22,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:22,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-19 07:48:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:22,389 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:48:22,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:22,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736245416] [2023-11-19 07:48:22,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736245416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:22,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:22,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:48:22,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193039389] [2023-11-19 07:48:22,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:22,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:48:22,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:22,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:48:22,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:48:22,392 INFO L87 Difference]: Start difference. First operand 112 states and 119 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:48:22,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:22,638 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2023-11-19 07:48:22,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:48:22,638 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2023-11-19 07:48:22,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:22,639 INFO L225 Difference]: With dead ends: 108 [2023-11-19 07:48:22,640 INFO L226 Difference]: Without dead ends: 108 [2023-11-19 07:48:22,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:48:22,640 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 27 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:22,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 354 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:48:22,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-19 07:48:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2023-11-19 07:48:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 71 states have (on average 1.5352112676056338) internal successors, (109), 103 states have internal predecessors, (109), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:22,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2023-11-19 07:48:22,644 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 46 [2023-11-19 07:48:22,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:22,645 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2023-11-19 07:48:22,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:48:22,645 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2023-11-19 07:48:22,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 07:48:22,645 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:22,645 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:22,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-19 07:48:22,646 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:22,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:22,646 INFO L85 PathProgramCache]: Analyzing trace with hash 18522842, now seen corresponding path program 1 times [2023-11-19 07:48:22,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:22,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530709601] [2023-11-19 07:48:22,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:22,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:22,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:22,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:22,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-19 07:48:22,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-19 07:48:22,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:22,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530709601] [2023-11-19 07:48:22,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530709601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:22,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:48:22,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:48:22,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718057568] [2023-11-19 07:48:22,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:22,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:48:22,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:22,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:48:22,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:48:22,978 INFO L87 Difference]: Start difference. First operand 108 states and 115 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:48:23,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:23,212 INFO L93 Difference]: Finished difference Result 104 states and 111 transitions. [2023-11-19 07:48:23,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:48:23,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2023-11-19 07:48:23,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:23,213 INFO L225 Difference]: With dead ends: 104 [2023-11-19 07:48:23,214 INFO L226 Difference]: Without dead ends: 104 [2023-11-19 07:48:23,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:48:23,214 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 22 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:23,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 366 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:48:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-11-19 07:48:23,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2023-11-19 07:48:23,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 71 states have (on average 1.4788732394366197) internal successors, (105), 99 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:23,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2023-11-19 07:48:23,218 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 46 [2023-11-19 07:48:23,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:23,219 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2023-11-19 07:48:23,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 07:48:23,219 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2023-11-19 07:48:23,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 07:48:23,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:23,219 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:23,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-19 07:48:23,220 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:23,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:23,220 INFO L85 PathProgramCache]: Analyzing trace with hash 18533764, now seen corresponding path program 1 times [2023-11-19 07:48:23,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:23,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093746898] [2023-11-19 07:48:23,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:23,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:23,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:23,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:23,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-19 07:48:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:24,050 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:48:24,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:24,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093746898] [2023-11-19 07:48:24,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093746898] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:24,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801317664] [2023-11-19 07:48:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:24,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:24,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:24,052 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:24,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:48:24,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:24,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-19 07:48:24,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:24,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-11-19 07:48:24,754 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|))) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)))) is different from true [2023-11-19 07:48:24,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:48:24,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 07:48:24,807 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2023-11-19 07:48:24,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2023-11-19 07:48:24,895 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 [2023-11-19 07:48:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:48:24,909 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:48:24,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801317664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:48:24,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:48:24,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 24 [2023-11-19 07:48:24,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451500666] [2023-11-19 07:48:24,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:48:24,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:48:24,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:48:24,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:48:24,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=484, Unknown=1, NotChecked=44, Total=600 [2023-11-19 07:48:24,911 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand has 12 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:48:25,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:48:25,484 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2023-11-19 07:48:25,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:48:25,485 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 46 [2023-11-19 07:48:25,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:48:25,487 INFO L225 Difference]: With dead ends: 121 [2023-11-19 07:48:25,487 INFO L226 Difference]: Without dead ends: 121 [2023-11-19 07:48:25,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=647, Unknown=1, NotChecked=52, Total=812 [2023-11-19 07:48:25,490 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 122 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:48:25,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 342 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 438 Invalid, 0 Unknown, 126 Unchecked, 0.4s Time] [2023-11-19 07:48:25,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-19 07:48:25,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2023-11-19 07:48:25,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 71 states have (on average 1.4647887323943662) internal successors, (104), 98 states have internal predecessors, (104), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 07:48:25,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 110 transitions. [2023-11-19 07:48:25,502 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 110 transitions. Word has length 46 [2023-11-19 07:48:25,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:48:25,502 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 110 transitions. [2023-11-19 07:48:25,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.3) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-19 07:48:25,503 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 110 transitions. [2023-11-19 07:48:25,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 07:48:25,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:48:25,503 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:48:25,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-19 07:48:25,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 07:48:25,724 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2023-11-19 07:48:25,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:48:25,724 INFO L85 PathProgramCache]: Analyzing trace with hash 18533765, now seen corresponding path program 1 times [2023-11-19 07:48:25,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:48:25,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117995863] [2023-11-19 07:48:25,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:25,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:48:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:26,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-19 07:48:26,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:26,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-19 07:48:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:26,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-19 07:48:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-19 07:48:27,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:48:27,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117995863] [2023-11-19 07:48:27,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117995863] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:48:27,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910387613] [2023-11-19 07:48:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:48:27,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:48:27,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:48:27,463 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:48:27,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_96c2f74a-8602-418d-ac46-9f33f1cc1f08/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:48:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:48:27,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-19 07:48:27,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:48:28,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-19 07:48:28,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-11-19 07:48:28,515 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 7 treesize of output 3 [2023-11-19 07:48:50,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:48:50,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-19 07:48:50,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:48:50,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-19 07:48:50,392 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-19 07:48:50,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2023-11-19 07:48:53,377 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 [2023-11-19 07:48:53,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-19 07:48:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:48:56,544 INFO L327 TraceCheckSpWp]: Computing backward predicates...