./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 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_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-08 16:06:30,809 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-08 16:06:30,916 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-11-08 16:06:30,923 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-08 16:06:30,926 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-08 16:06:30,958 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-08 16:06:30,961 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-08 16:06:30,962 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-08 16:06:30,962 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-08 16:06:30,963 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-08 16:06:30,964 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-08 16:06:30,964 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-08 16:06:30,965 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-08 16:06:30,965 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-08 16:06:30,967 INFO L153 SettingsManager]: * Use SBE=true [2024-11-08 16:06:30,967 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-08 16:06:30,968 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-08 16:06:30,968 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-08 16:06:30,968 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-08 16:06:30,969 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-08 16:06:30,969 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-08 16:06:30,973 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-08 16:06:30,973 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-08 16:06:30,974 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-08 16:06:30,974 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-08 16:06:30,974 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-08 16:06:30,974 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-08 16:06:30,975 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-08 16:06:30,975 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-08 16:06:30,975 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-08 16:06:30,975 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:06:30,976 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-08 16:06:30,976 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-08 16:06:30,976 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-08 16:06:30,976 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-08 16:06:30,977 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-08 16:06:30,978 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-08 16:06:30,978 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-08 16:06:30,979 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-08 16:06:30,979 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_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 [2024-11-08 16:06:31,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-08 16:06:31,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-08 16:06:31,346 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-08 16:06:31,347 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-08 16:06:31,348 INFO L274 PluginConnector]: CDTParser initialized [2024-11-08 16:06:31,349 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c Unable to find full path for "g++" [2024-11-08 16:06:33,284 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-08 16:06:33,485 INFO L384 CDTParser]: Found 1 translation units. [2024-11-08 16:06:33,485 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2024-11-08 16:06:33,493 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/data/f0a9b90f1/1de9944fa7c34473b461187ca19841f9/FLAGdf357c95e [2024-11-08 16:06:33,864 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/data/f0a9b90f1/1de9944fa7c34473b461187ca19841f9 [2024-11-08 16:06:33,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-08 16:06:33,868 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-08 16:06:33,869 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-08 16:06:33,870 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-08 16:06:33,877 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-08 16:06:33,880 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:06:33" (1/1) ... [2024-11-08 16:06:33,882 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@401ad3ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:33, skipping insertion in model container [2024-11-08 16:06:33,882 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.11 04:06:33" (1/1) ... [2024-11-08 16:06:33,902 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-08 16:06:34,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:06:34,087 INFO L200 MainTranslator]: Completed pre-run [2024-11-08 16:06:34,100 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-08 16:06:34,118 INFO L204 MainTranslator]: Completed translation [2024-11-08 16:06:34,118 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:34 WrapperNode [2024-11-08 16:06:34,118 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-08 16:06:34,120 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-08 16:06:34,120 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-08 16:06:34,120 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-08 16:06:34,128 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:34" (1/1) ... [2024-11-08 16:06:34,135 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:34" (1/1) ... [2024-11-08 16:06:34,151 INFO L138 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2024-11-08 16:06:34,152 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-08 16:06:34,152 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-08 16:06:34,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-08 16:06:34,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-08 16:06:34,167 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:34" (1/1) ... [2024-11-08 16:06:34,167 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:34" (1/1) ... [2024-11-08 16:06:34,169 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:34" (1/1) ... [2024-11-08 16:06:34,182 INFO L175 MemorySlicer]: Split 4 memory accesses to 1 slices as follows [4]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 2 writes are split as follows [2]. [2024-11-08 16:06:34,182 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:34" (1/1) ... [2024-11-08 16:06:34,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:34" (1/1) ... [2024-11-08 16:06:34,187 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:34" (1/1) ... [2024-11-08 16:06:34,191 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:34" (1/1) ... [2024-11-08 16:06:34,192 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:34" (1/1) ... [2024-11-08 16:06:34,192 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:34" (1/1) ... [2024-11-08 16:06:34,194 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-08 16:06:34,195 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-08 16:06:34,195 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-08 16:06:34,195 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-08 16:06:34,196 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:34" (1/1) ... [2024-11-08 16:06:34,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-08 16:06:34,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:34,233 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-08 16:06:34,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-08 16:06:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-08 16:06:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-08 16:06:34,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-08 16:06:34,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-08 16:06:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-08 16:06:34,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-08 16:06:34,349 INFO L238 CfgBuilder]: Building ICFG [2024-11-08 16:06:34,353 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-08 16:06:34,701 INFO L? ?]: Removed 29 outVars from TransFormulas that were not future-live. [2024-11-08 16:06:34,705 INFO L287 CfgBuilder]: Performing block encoding [2024-11-08 16:06:34,721 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-08 16:06:34,722 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-08 16:06:34,722 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:06:34 BoogieIcfgContainer [2024-11-08 16:06:34,722 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-08 16:06:34,724 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-08 16:06:34,724 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-08 16:06:34,730 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-08 16:06:34,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.11 04:06:33" (1/3) ... [2024-11-08 16:06:34,730 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171d4925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:06:34, skipping insertion in model container [2024-11-08 16:06:34,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.11 04:06:34" (2/3) ... [2024-11-08 16:06:34,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171d4925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.11 04:06:34, skipping insertion in model container [2024-11-08 16:06:34,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.11 04:06:34" (3/3) ... [2024-11-08 16:06:34,732 INFO L112 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-2.c [2024-11-08 16:06:34,746 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-08 16:06:34,746 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-08 16:06:34,794 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-08 16:06:34,801 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@7cee89a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-08 16:06:34,802 INFO L334 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2024-11-08 16:06:34,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:34,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-08 16:06:34,810 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:34,810 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-08 16:06:34,811 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:34,816 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash 28694853, now seen corresponding path program 1 times [2024-11-08 16:06:34,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:34,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565220843] [2024-11-08 16:06:34,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:34,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:35,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:35,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565220843] [2024-11-08 16:06:35,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565220843] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:35,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:35,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:06:35,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094628285] [2024-11-08 16:06:35,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:35,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:06:35,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:35,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:06:35,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:06:35,185 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:35,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:35,272 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2024-11-08 16:06:35,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:06:35,275 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-08 16:06:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:35,285 INFO L225 Difference]: With dead ends: 45 [2024-11-08 16:06:35,285 INFO L226 Difference]: Without dead ends: 43 [2024-11-08 16:06:35,287 INFO L431 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 [2024-11-08 16:06:35,292 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:35,294 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 52 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:06:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-08 16:06:35,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2024-11-08 16:06:35,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 36 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:35,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2024-11-08 16:06:35,332 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 5 [2024-11-08 16:06:35,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:35,332 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2024-11-08 16:06:35,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:35,333 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2024-11-08 16:06:35,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-08 16:06:35,333 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:35,334 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-08 16:06:35,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-08 16:06:35,334 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:35,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:35,335 INFO L85 PathProgramCache]: Analyzing trace with hash 28694854, now seen corresponding path program 1 times [2024-11-08 16:06:35,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:35,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954785371] [2024-11-08 16:06:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:35,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:35,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:35,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:35,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954785371] [2024-11-08 16:06:35,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954785371] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:35,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:35,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:06:35,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910266877] [2024-11-08 16:06:35,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:35,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:06:35,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:35,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:06:35,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:06:35,571 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:35,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:35,635 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2024-11-08 16:06:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:06:35,636 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-08 16:06:35,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:35,636 INFO L225 Difference]: With dead ends: 41 [2024-11-08 16:06:35,636 INFO L226 Difference]: Without dead ends: 41 [2024-11-08 16:06:35,637 INFO L431 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 [2024-11-08 16:06:35,638 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:35,639 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:06:35,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-11-08 16:06:35,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2024-11-08 16:06:35,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:35,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2024-11-08 16:06:35,645 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 5 [2024-11-08 16:06:35,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:35,645 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2024-11-08 16:06:35,646 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:35,646 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2024-11-08 16:06:35,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-08 16:06:35,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:35,646 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-08 16:06:35,647 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-08 16:06:35,647 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:35,648 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:35,651 INFO L85 PathProgramCache]: Analyzing trace with hash 350650558, now seen corresponding path program 1 times [2024-11-08 16:06:35,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:35,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229156895] [2024-11-08 16:06:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:35,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:35,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:35,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:35,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229156895] [2024-11-08 16:06:35,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229156895] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:35,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189891620] [2024-11-08 16:06:35,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:35,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:35,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:35,999 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:36,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-08 16:06:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:36,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-08 16:06:36,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:36,188 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 [2024-11-08 16:06:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:36,300 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:06:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:36,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189891620] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:06:36,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:06:36,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-08 16:06:36,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298404557] [2024-11-08 16:06:36,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:06:36,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-08 16:06:36,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:36,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-08 16:06:36,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-08 16:06:36,454 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:36,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:36,588 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2024-11-08 16:06:36,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:06:36,589 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-08 16:06:36,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:36,590 INFO L225 Difference]: With dead ends: 52 [2024-11-08 16:06:36,591 INFO L226 Difference]: Without dead ends: 52 [2024-11-08 16:06:36,591 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-08 16:06:36,592 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:36,593 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 93 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:06:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-08 16:06:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-08 16:06:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.5476190476190477) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:36,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 65 transitions. [2024-11-08 16:06:36,599 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 65 transitions. Word has length 9 [2024-11-08 16:06:36,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:36,599 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 65 transitions. [2024-11-08 16:06:36,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:36,600 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 65 transitions. [2024-11-08 16:06:36,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 16:06:36,600 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:36,600 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:06:36,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-08 16:06:36,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:36,802 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:36,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:36,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1638613316, now seen corresponding path program 1 times [2024-11-08 16:06:36,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:36,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399880442] [2024-11-08 16:06:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:36,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:06:36,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:36,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399880442] [2024-11-08 16:06:36,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399880442] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:36,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:36,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:06:36,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144837026] [2024-11-08 16:06:36,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:36,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:06:36,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:36,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:06:36,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:06:36,930 INFO L87 Difference]: Start difference. First operand 52 states and 65 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:36,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:36,984 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-11-08 16:06:36,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:06:36,984 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-08 16:06:36,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:36,985 INFO L225 Difference]: With dead ends: 49 [2024-11-08 16:06:36,985 INFO L226 Difference]: Without dead ends: 49 [2024-11-08 16:06:36,985 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:06:36,987 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 42 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:36,987 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 18 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:06:36,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-08 16:06:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2024-11-08 16:06:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 42 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2024-11-08 16:06:36,992 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2024-11-08 16:06:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:36,992 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2024-11-08 16:06:36,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:36,992 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2024-11-08 16:06:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-08 16:06:36,993 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:36,993 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:06:36,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-08 16:06:36,993 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:36,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:36,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1638613317, now seen corresponding path program 1 times [2024-11-08 16:06:36,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:36,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880806681] [2024-11-08 16:06:36,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:36,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:37,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:37,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:06:37,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:37,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880806681] [2024-11-08 16:06:37,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880806681] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:37,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:37,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:06:37,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382760034] [2024-11-08 16:06:37,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:37,090 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:06:37,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:37,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:06:37,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-08 16:06:37,091 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:37,153 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2024-11-08 16:06:37,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:06:37,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-11-08 16:06:37,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:37,155 INFO L225 Difference]: With dead ends: 58 [2024-11-08 16:06:37,155 INFO L226 Difference]: Without dead ends: 58 [2024-11-08 16:06:37,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:06:37,156 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:37,157 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 34 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:06:37,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-08 16:06:37,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2024-11-08 16:06:37,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:37,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2024-11-08 16:06:37,165 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 15 [2024-11-08 16:06:37,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:37,165 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2024-11-08 16:06:37,166 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:37,168 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2024-11-08 16:06:37,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-08 16:06:37,169 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:37,169 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:06:37,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-08 16:06:37,170 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:37,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:37,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1545412697, now seen corresponding path program 1 times [2024-11-08 16:06:37,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:37,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230225359] [2024-11-08 16:06:37,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:37,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:37,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:06:37,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:37,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230225359] [2024-11-08 16:06:37,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230225359] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:37,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:37,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-08 16:06:37,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481115690] [2024-11-08 16:06:37,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:37,305 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-08 16:06:37,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:37,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-08 16:06:37,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-08 16:06:37,309 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:37,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:37,416 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2024-11-08 16:06:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-08 16:06:37,422 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-08 16:06:37,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:37,422 INFO L225 Difference]: With dead ends: 53 [2024-11-08 16:06:37,422 INFO L226 Difference]: Without dead ends: 53 [2024-11-08 16:06:37,423 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-08 16:06:37,423 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:37,424 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 52 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:06:37,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-08 16:06:37,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2024-11-08 16:06:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2024-11-08 16:06:37,439 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 17 [2024-11-08 16:06:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:37,439 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2024-11-08 16:06:37,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2024-11-08 16:06:37,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-08 16:06:37,440 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:37,440 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:06:37,440 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-08 16:06:37,441 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:37,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:37,441 INFO L85 PathProgramCache]: Analyzing trace with hash 736172330, now seen corresponding path program 1 times [2024-11-08 16:06:37,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:37,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341291163] [2024-11-08 16:06:37,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:37,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:37,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-08 16:06:37,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:37,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341291163] [2024-11-08 16:06:37,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341291163] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:37,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:37,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-08 16:06:37,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941135527] [2024-11-08 16:06:37,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:37,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:06:37,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:37,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:06:37,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:06:37,521 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:37,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:37,533 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2024-11-08 16:06:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:06:37,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-08 16:06:37,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:37,535 INFO L225 Difference]: With dead ends: 51 [2024-11-08 16:06:37,535 INFO L226 Difference]: Without dead ends: 51 [2024-11-08 16:06:37,535 INFO L431 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 [2024-11-08 16:06:37,536 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 14 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:37,537 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 27 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:06:37,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-08 16:06:37,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-08 16:06:37,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.326086956521739) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:37,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-11-08 16:06:37,544 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 19 [2024-11-08 16:06:37,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:37,545 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-11-08 16:06:37,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:37,545 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-11-08 16:06:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-08 16:06:37,549 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:37,549 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:06:37,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-08 16:06:37,550 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:37,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:37,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1207991795, now seen corresponding path program 1 times [2024-11-08 16:06:37,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:37,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388236055] [2024-11-08 16:06:37,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:37,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:37,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:37,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:37,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388236055] [2024-11-08 16:06:37,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388236055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:37,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743050082] [2024-11-08 16:06:37,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:37,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:37,620 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:37,621 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:37,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-08 16:06:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:37,681 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-08 16:06:37,682 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:37,717 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:06:37,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:37,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743050082] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:06:37,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:06:37,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-11-08 16:06:37,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773955437] [2024-11-08 16:06:37,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:06:37,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-08 16:06:37,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:37,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-08 16:06:37,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-08 16:06:37,772 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:37,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:37,830 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2024-11-08 16:06:37,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-08 16:06:37,831 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-08 16:06:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:37,831 INFO L225 Difference]: With dead ends: 57 [2024-11-08 16:06:37,831 INFO L226 Difference]: Without dead ends: 57 [2024-11-08 16:06:37,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-11-08 16:06:37,832 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:37,832 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 66 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:06:37,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-08 16:06:37,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-11-08 16:06:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 56 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:37,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2024-11-08 16:06:37,838 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 21 [2024-11-08 16:06:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:37,838 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2024-11-08 16:06:37,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2024-11-08 16:06:37,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-08 16:06:37,839 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:37,839 INFO L215 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1] [2024-11-08 16:06:37,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-08 16:06:38,043 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:38,044 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:38,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:38,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1636667174, now seen corresponding path program 2 times [2024-11-08 16:06:38,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:38,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827081211] [2024-11-08 16:06:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:38,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:38,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:38,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827081211] [2024-11-08 16:06:38,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827081211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:38,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231474940] [2024-11-08 16:06:38,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:06:38,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:38,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:38,265 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:38,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-08 16:06:38,339 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:06:38,339 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:06:38,340 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 16:06:38,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:38,362 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 [2024-11-08 16:06:38,616 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:38,616 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:06:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:38,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231474940] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:06:38,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:06:38,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-08 16:06:38,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415439223] [2024-11-08 16:06:38,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:06:38,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-08 16:06:38,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:38,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-08 16:06:38,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2024-11-08 16:06:38,853 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 16 states, 15 states have (on average 3.8) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:39,153 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2024-11-08 16:06:39,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-08 16:06:39,153 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.8) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-08 16:06:39,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:39,154 INFO L225 Difference]: With dead ends: 75 [2024-11-08 16:06:39,154 INFO L226 Difference]: Without dead ends: 75 [2024-11-08 16:06:39,155 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2024-11-08 16:06:39,155 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:39,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 128 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 16:06:39,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-11-08 16:06:39,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-11-08 16:06:39,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.2) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:39,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2024-11-08 16:06:39,160 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 21 [2024-11-08 16:06:39,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:39,160 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2024-11-08 16:06:39,160 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.8) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:39,161 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2024-11-08 16:06:39,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-08 16:06:39,161 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:39,161 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:06:39,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-08 16:06:39,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:39,365 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:39,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:39,366 INFO L85 PathProgramCache]: Analyzing trace with hash 946829293, now seen corresponding path program 2 times [2024-11-08 16:06:39,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:39,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095479046] [2024-11-08 16:06:39,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:39,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:39,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:39,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095479046] [2024-11-08 16:06:39,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095479046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:39,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836668769] [2024-11-08 16:06:39,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:06:39,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:39,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:39,496 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:39,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-08 16:06:39,555 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-08 16:06:39,555 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:06:39,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:06:39,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:39,752 WARN L873 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~p~0#1.base_13| Int)) (and (= |c_#valid| (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~p~0#1.base_13| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~p~0#1.base_13|) 0))) is different from true [2024-11-08 16:06:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-08 16:06:39,753 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:06:39,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836668769] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:39,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:06:39,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9] total 11 [2024-11-08 16:06:39,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634943233] [2024-11-08 16:06:39,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:39,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-08 16:06:39,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:39,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-08 16:06:39,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=53, Unknown=1, NotChecked=16, Total=110 [2024-11-08 16:06:39,754 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:39,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:39,774 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2024-11-08 16:06:39,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-08 16:06:39,775 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-08 16:06:39,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:39,775 INFO L225 Difference]: With dead ends: 74 [2024-11-08 16:06:39,775 INFO L226 Difference]: Without dead ends: 70 [2024-11-08 16:06:39,776 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=53, Unknown=1, NotChecked=16, Total=110 [2024-11-08 16:06:39,776 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:39,777 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2024-11-08 16:06:39,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-08 16:06:39,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2024-11-08 16:06:39,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 69 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:39,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 78 transitions. [2024-11-08 16:06:39,781 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 78 transitions. Word has length 37 [2024-11-08 16:06:39,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:39,781 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 78 transitions. [2024-11-08 16:06:39,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:39,781 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 78 transitions. [2024-11-08 16:06:39,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-08 16:06:39,782 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:39,782 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:06:39,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-08 16:06:39,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-08 16:06:39,986 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:39,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:39,987 INFO L85 PathProgramCache]: Analyzing trace with hash 948163964, now seen corresponding path program 1 times [2024-11-08 16:06:39,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:39,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516493808] [2024-11-08 16:06:39,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:39,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:06:40,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:40,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516493808] [2024-11-08 16:06:40,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516493808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:40,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59722000] [2024-11-08 16:06:40,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:40,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:40,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:40,123 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:40,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-08 16:06:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:40,213 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-08 16:06:40,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:40,265 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:06:40,265 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:06:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:06:40,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59722000] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:06:40,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:06:40,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-08 16:06:40,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163207912] [2024-11-08 16:06:40,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:06:40,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-08 16:06:40,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:40,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-08 16:06:40,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-08 16:06:40,419 INFO L87 Difference]: Start difference. First operand 70 states and 78 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:40,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:40,523 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2024-11-08 16:06:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-08 16:06:40,523 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2024-11-08 16:06:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:40,524 INFO L225 Difference]: With dead ends: 84 [2024-11-08 16:06:40,524 INFO L226 Difference]: Without dead ends: 84 [2024-11-08 16:06:40,524 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-08 16:06:40,525 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:40,525 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 67 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-08 16:06:40,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-11-08 16:06:40,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2024-11-08 16:06:40,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.1375) internal successors, (91), 83 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:40,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2024-11-08 16:06:40,530 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 37 [2024-11-08 16:06:40,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:40,530 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2024-11-08 16:06:40,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:40,530 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2024-11-08 16:06:40,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-08 16:06:40,531 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:40,531 INFO L215 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1] [2024-11-08 16:06:40,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-08 16:06:40,731 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-08 16:06:40,732 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:40,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:40,732 INFO L85 PathProgramCache]: Analyzing trace with hash -624519178, now seen corresponding path program 3 times [2024-11-08 16:06:40,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:40,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765673175] [2024-11-08 16:06:40,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:40,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-08 16:06:41,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:41,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765673175] [2024-11-08 16:06:41,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765673175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:41,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942327957] [2024-11-08 16:06:41,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:06:41,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:41,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:41,302 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:41,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-08 16:06:41,376 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 16:06:41,376 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:06:41,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-08 16:06:41,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:41,391 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 [2024-11-08 16:06:41,699 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-11-08 16:06:41,699 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-08 16:06:41,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942327957] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:41,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-08 16:06:41,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2024-11-08 16:06:41,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027408124] [2024-11-08 16:06:41,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:41,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-08 16:06:41,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:41,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-08 16:06:41,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-11-08 16:06:41,701 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:41,739 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2024-11-08 16:06:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-08 16:06:41,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-08 16:06:41,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:41,740 INFO L225 Difference]: With dead ends: 83 [2024-11-08 16:06:41,740 INFO L226 Difference]: Without dead ends: 83 [2024-11-08 16:06:41,740 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-11-08 16:06:41,741 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:41,741 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:06:41,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-11-08 16:06:41,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2024-11-08 16:06:41,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 80 states have (on average 1.0875) internal successors, (87), 82 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:41,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2024-11-08 16:06:41,750 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 45 [2024-11-08 16:06:41,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:41,750 INFO L471 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2024-11-08 16:06:41,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:41,751 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2024-11-08 16:06:41,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-08 16:06:41,752 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:41,752 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:06:41,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-08 16:06:41,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:41,953 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:41,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:41,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1188265668, now seen corresponding path program 2 times [2024-11-08 16:06:41,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:41,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413580319] [2024-11-08 16:06:41,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:41,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:06:42,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:42,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413580319] [2024-11-08 16:06:42,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413580319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:42,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437703207] [2024-11-08 16:06:42,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:06:42,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:42,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:42,395 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:42,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-08 16:06:42,496 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:06:42,496 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:06:42,498 INFO L255 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-08 16:06:42,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:06:42,615 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:06:43,119 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:06:43,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437703207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:06:43,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:06:43,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-11-08 16:06:43,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306699013] [2024-11-08 16:06:43,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:06:43,120 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-08 16:06:43,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:43,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-08 16:06:43,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 16:06:43,122 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:43,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:43,311 INFO L93 Difference]: Finished difference Result 147 states and 151 transitions. [2024-11-08 16:06:43,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-08 16:06:43,312 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2024-11-08 16:06:43,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:43,313 INFO L225 Difference]: With dead ends: 147 [2024-11-08 16:06:43,313 INFO L226 Difference]: Without dead ends: 147 [2024-11-08 16:06:43,313 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-11-08 16:06:43,314 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:43,314 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 99 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-08 16:06:43,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-08 16:06:43,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2024-11-08 16:06:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 144 states have (on average 1.0486111111111112) internal successors, (151), 146 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:43,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2024-11-08 16:06:43,319 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 69 [2024-11-08 16:06:43,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:43,320 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2024-11-08 16:06:43,320 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.9393939393939394) internal successors, (130), 33 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:43,320 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2024-11-08 16:06:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-11-08 16:06:43,322 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:43,322 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:06:43,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-08 16:06:43,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:43,523 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:43,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:43,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1952393028, now seen corresponding path program 3 times [2024-11-08 16:06:43,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:43,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506571297] [2024-11-08 16:06:43,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:43,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:43,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:44,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-08 16:06:44,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:44,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506571297] [2024-11-08 16:06:44,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506571297] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:44,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180107719] [2024-11-08 16:06:44,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-08 16:06:44,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:44,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:44,900 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:44,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-08 16:06:45,004 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-08 16:06:45,004 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:06:45,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-08 16:06:45,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:45,029 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 [2024-11-08 16:06:45,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2024-11-08 16:06:45,776 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:06:46,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2024-11-08 16:06:46,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180107719] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:06:46,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:06:46,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 45 [2024-11-08 16:06:46,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433140245] [2024-11-08 16:06:46,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:06:46,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-08 16:06:46,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:46,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-08 16:06:46,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=1408, Unknown=0, NotChecked=0, Total=1980 [2024-11-08 16:06:46,683 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:48,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:48,975 INFO L93 Difference]: Finished difference Result 193 states and 206 transitions. [2024-11-08 16:06:48,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-08 16:06:48,976 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2024-11-08 16:06:48,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:48,977 INFO L225 Difference]: With dead ends: 193 [2024-11-08 16:06:48,977 INFO L226 Difference]: Without dead ends: 193 [2024-11-08 16:06:48,979 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2210, Invalid=5100, Unknown=0, NotChecked=0, Total=7310 [2024-11-08 16:06:48,980 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 845 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:48,980 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 120 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-08 16:06:48,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-11-08 16:06:48,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 172. [2024-11-08 16:06:48,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0584795321637428) internal successors, (181), 171 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:48,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 181 transitions. [2024-11-08 16:06:48,986 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 181 transitions. Word has length 133 [2024-11-08 16:06:48,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:48,986 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 181 transitions. [2024-11-08 16:06:48,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6222222222222222) internal successors, (163), 45 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:48,987 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 181 transitions. [2024-11-08 16:06:48,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-08 16:06:48,989 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:48,989 INFO L215 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 5, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-08 16:06:49,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-08 16:06:49,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-08 16:06:49,193 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:49,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:49,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1876393872, now seen corresponding path program 1 times [2024-11-08 16:06:49,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:49,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333088928] [2024-11-08 16:06:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:49,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:49,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 1903 trivial. 0 not checked. [2024-11-08 16:06:49,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:49,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333088928] [2024-11-08 16:06:49,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333088928] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-08 16:06:49,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-08 16:06:49,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-08 16:06:49,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302530232] [2024-11-08 16:06:49,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-08 16:06:49,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-08 16:06:49,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:49,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-08 16:06:49,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:06:49,303 INFO L87 Difference]: Start difference. First operand 172 states and 181 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:49,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:49,310 INFO L93 Difference]: Finished difference Result 175 states and 181 transitions. [2024-11-08 16:06:49,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-08 16:06:49,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2024-11-08 16:06:49,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:49,312 INFO L225 Difference]: With dead ends: 175 [2024-11-08 16:06:49,312 INFO L226 Difference]: Without dead ends: 172 [2024-11-08 16:06:49,312 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-08 16:06:49,313 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:49,313 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-08 16:06:49,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-11-08 16:06:49,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2024-11-08 16:06:49,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0350877192982457) internal successors, (177), 171 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:49,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 177 transitions. [2024-11-08 16:06:49,317 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 177 transitions. Word has length 149 [2024-11-08 16:06:49,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:49,318 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 177 transitions. [2024-11-08 16:06:49,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:49,318 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 177 transitions. [2024-11-08 16:06:49,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-11-08 16:06:49,324 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:49,324 INFO L215 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-08 16:06:49,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-08 16:06:49,325 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:49,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:49,325 INFO L85 PathProgramCache]: Analyzing trace with hash -57444935, now seen corresponding path program 4 times [2024-11-08 16:06:49,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:49,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89189214] [2024-11-08 16:06:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:49,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 16:06:50,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:50,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89189214] [2024-11-08 16:06:50,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89189214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:50,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343148559] [2024-11-08 16:06:50,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-08 16:06:50,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:50,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:50,758 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:50,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-08 16:06:51,821 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-08 16:06:51,822 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:06:51,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-08 16:06:51,829 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:06:52,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 16:06:52,029 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:06:53,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1939 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 16:06:53,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343148559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:06:53,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:06:53,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2024-11-08 16:06:53,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523672936] [2024-11-08 16:06:53,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:06:53,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-08 16:06:53,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:06:53,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-08 16:06:53,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2024-11-08 16:06:53,705 INFO L87 Difference]: Start difference. First operand 172 states and 177 transitions. Second operand has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:06:54,119 INFO L93 Difference]: Finished difference Result 304 states and 309 transitions. [2024-11-08 16:06:54,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-08 16:06:54,120 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2024-11-08 16:06:54,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:06:54,121 INFO L225 Difference]: With dead ends: 304 [2024-11-08 16:06:54,121 INFO L226 Difference]: Without dead ends: 304 [2024-11-08 16:06:54,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2024-11-08 16:06:54,123 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-08 16:06:54,123 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 94 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-08 16:06:54,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2024-11-08 16:06:54,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2024-11-08 16:06:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 1.0198019801980198) internal successors, (309), 303 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:54,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 309 transitions. [2024-11-08 16:06:54,129 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 309 transitions. Word has length 155 [2024-11-08 16:06:54,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:06:54,129 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 309 transitions. [2024-11-08 16:06:54,130 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.970149253731343) internal successors, (266), 67 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:06:54,130 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 309 transitions. [2024-11-08 16:06:54,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2024-11-08 16:06:54,134 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:06:54,134 INFO L215 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-08 16:06:54,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-08 16:06:54,334 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-08 16:06:54,335 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:06:54,335 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:06:54,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1718279631, now seen corresponding path program 5 times [2024-11-08 16:06:54,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:06:54,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176600003] [2024-11-08 16:06:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:06:54,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:06:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:06:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 8176 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 16:06:59,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:06:59,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176600003] [2024-11-08 16:06:59,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176600003] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:06:59,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664098053] [2024-11-08 16:06:59,371 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-08 16:06:59,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:06:59,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:06:59,372 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:06:59,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-08 16:16:48,832 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 65 check-sat command(s) [2024-11-08 16:16:48,832 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:16:48,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-08 16:16:48,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:16:49,304 INFO L134 CoverageAnalysis]: Checked inductivity of 8176 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 16:16:49,305 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:16:54,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8176 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 16:16:54,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664098053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:16:54,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:16:54,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2024-11-08 16:16:54,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866030378] [2024-11-08 16:16:54,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:16:54,885 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2024-11-08 16:16:54,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:16:54,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2024-11-08 16:16:54,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2024-11-08 16:16:54,893 INFO L87 Difference]: Start difference. First operand 304 states and 309 transitions. Second operand has 133 states, 133 states have (on average 3.9849624060150375) internal successors, (530), 133 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:16:55,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:16:55,923 INFO L93 Difference]: Finished difference Result 568 states and 573 transitions. [2024-11-08 16:16:55,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-11-08 16:16:55,924 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.9849624060150375) internal successors, (530), 133 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 287 [2024-11-08 16:16:55,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:16:55,926 INFO L225 Difference]: With dead ends: 568 [2024-11-08 16:16:55,926 INFO L226 Difference]: Without dead ends: 568 [2024-11-08 16:16:55,930 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 639 GetRequests, 508 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2024-11-08 16:16:55,931 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-08 16:16:55,931 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 55 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-08 16:16:55,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2024-11-08 16:16:55,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2024-11-08 16:16:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 1.0105820105820107) internal successors, (573), 567 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:16:55,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 573 transitions. [2024-11-08 16:16:55,941 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 573 transitions. Word has length 287 [2024-11-08 16:16:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:16:55,941 INFO L471 AbstractCegarLoop]: Abstraction has 568 states and 573 transitions. [2024-11-08 16:16:55,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.9849624060150375) internal successors, (530), 133 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:16:55,942 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 573 transitions. [2024-11-08 16:16:55,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2024-11-08 16:16:55,954 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:16:55,954 INFO L215 NwaCegarLoop]: trace histogram [130, 130, 130, 130, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-08 16:16:56,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-08 16:16:56,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-08 16:16:56,155 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:16:56,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:16:56,155 INFO L85 PathProgramCache]: Analyzing trace with hash -702085343, now seen corresponding path program 6 times [2024-11-08 16:16:56,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:16:56,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444581624] [2024-11-08 16:16:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:16:56,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:16:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:17:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 33718 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-11-08 16:17:11,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:17:11,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444581624] [2024-11-08 16:17:11,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444581624] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:17:11,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40239819] [2024-11-08 16:17:11,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-08 16:17:11,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:17:11,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:17:11,367 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:17:11,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-08 16:17:11,643 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-11-08 16:17:11,643 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:17:11,645 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-08 16:17:11,654 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:17:11,663 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 [2024-11-08 16:17:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 33718 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2024-11-08 16:17:14,285 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:17:17,313 INFO L134 CoverageAnalysis]: Checked inductivity of 33718 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2024-11-08 16:17:17,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40239819] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:17:17,314 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:17:17,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 9, 10] total 150 [2024-11-08 16:17:17,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304216176] [2024-11-08 16:17:17,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:17:17,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2024-11-08 16:17:17,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:17:17,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2024-11-08 16:17:17,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8858, Invalid=13492, Unknown=0, NotChecked=0, Total=22350 [2024-11-08 16:17:17,325 INFO L87 Difference]: Start difference. First operand 568 states and 573 transitions. Second operand has 150 states, 150 states have (on average 3.993333333333333) internal successors, (599), 150 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:17:35,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:17:35,405 INFO L93 Difference]: Finished difference Result 669 states and 681 transitions. [2024-11-08 16:17:35,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2024-11-08 16:17:35,406 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 3.993333333333333) internal successors, (599), 150 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 551 [2024-11-08 16:17:35,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:17:35,409 INFO L225 Difference]: With dead ends: 669 [2024-11-08 16:17:35,409 INFO L226 Difference]: Without dead ends: 669 [2024-11-08 16:17:35,420 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1388 GetRequests, 1085 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14809 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=30140, Invalid=62580, Unknown=0, NotChecked=0, Total=92720 [2024-11-08 16:17:35,420 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 4255 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1153 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4255 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-08 16:17:35,421 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4255 Valid, 469 Invalid, 1167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1153 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-08 16:17:35,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2024-11-08 16:17:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 632. [2024-11-08 16:17:35,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 1.0190174326465926) internal successors, (643), 631 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:17:35,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 643 transitions. [2024-11-08 16:17:35,441 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 643 transitions. Word has length 551 [2024-11-08 16:17:35,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:17:35,443 INFO L471 AbstractCegarLoop]: Abstraction has 632 states and 643 transitions. [2024-11-08 16:17:35,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 3.993333333333333) internal successors, (599), 150 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:17:35,444 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 643 transitions. [2024-11-08 16:17:35,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2024-11-08 16:17:35,459 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:17:35,459 INFO L215 NwaCegarLoop]: trace histogram [131, 131, 131, 131, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2024-11-08 16:17:35,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-08 16:17:35,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-08 16:17:35,660 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:17:35,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:17:35,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1454159331, now seen corresponding path program 7 times [2024-11-08 16:17:35,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:17:35,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036277111] [2024-11-08 16:17:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:17:35,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:17:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:17:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 34491 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-08 16:17:50,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:17:50,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036277111] [2024-11-08 16:17:50,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036277111] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:17:50,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467786959] [2024-11-08 16:17:50,391 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-08 16:17:50,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:17:50,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:17:50,393 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:17:50,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-08 16:17:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:17:50,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 2036 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-11-08 16:17:50,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:17:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 34491 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-08 16:17:51,613 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:18:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 34491 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-08 16:18:14,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467786959] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:18:14,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:18:14,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [134, 134, 134] total 267 [2024-11-08 16:18:14,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091266011] [2024-11-08 16:18:14,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:18:14,271 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 267 states [2024-11-08 16:18:14,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:18:14,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 267 interpolants. [2024-11-08 16:18:14,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35511, Invalid=35511, Unknown=0, NotChecked=0, Total=71022 [2024-11-08 16:18:14,292 INFO L87 Difference]: Start difference. First operand 632 states and 643 transitions. Second operand has 267 states, 267 states have (on average 3.99250936329588) internal successors, (1066), 267 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:18,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-08 16:18:18,477 INFO L93 Difference]: Finished difference Result 1164 states and 1175 transitions. [2024-11-08 16:18:18,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2024-11-08 16:18:18,479 INFO L78 Accepts]: Start accepts. Automaton has has 267 states, 267 states have (on average 3.99250936329588) internal successors, (1066), 267 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 591 [2024-11-08 16:18:18,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-08 16:18:18,482 INFO L225 Difference]: With dead ends: 1164 [2024-11-08 16:18:18,482 INFO L226 Difference]: Without dead ends: 1164 [2024-11-08 16:18:18,488 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1314 GetRequests, 1049 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=35511, Invalid=35511, Unknown=0, NotChecked=0, Total=71022 [2024-11-08 16:18:18,489 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-08 16:18:18,489 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-08 16:18:18,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2024-11-08 16:18:18,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1164. [2024-11-08 16:18:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 1.0103181427343078) internal successors, (1175), 1163 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:18,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 1175 transitions. [2024-11-08 16:18:18,511 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 1175 transitions. Word has length 591 [2024-11-08 16:18:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-08 16:18:18,512 INFO L471 AbstractCegarLoop]: Abstraction has 1164 states and 1175 transitions. [2024-11-08 16:18:18,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 267 states, 267 states have (on average 3.99250936329588) internal successors, (1066), 267 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-08 16:18:18,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 1175 transitions. [2024-11-08 16:18:18,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1124 [2024-11-08 16:18:18,524 INFO L207 NwaCegarLoop]: Found error trace [2024-11-08 16:18:18,525 INFO L215 NwaCegarLoop]: trace histogram [264, 264, 264, 264, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2024-11-08 16:18:18,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-08 16:18:18,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:18:18,726 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-11-08 16:18:18,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-08 16:18:18,726 INFO L85 PathProgramCache]: Analyzing trace with hash -31108805, now seen corresponding path program 8 times [2024-11-08 16:18:18,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-08 16:18:18,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535074682] [2024-11-08 16:18:18,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-08 16:18:18,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-08 16:18:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-08 16:19:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 139428 backedges. 0 proven. 139128 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-08 16:19:30,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-08 16:19:30,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535074682] [2024-11-08 16:19:30,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535074682] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-08 16:19:30,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090273005] [2024-11-08 16:19:30,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-08 16:19:30,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-08 16:19:30,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 [2024-11-08 16:19:30,909 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-08 16:19:30,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_135f307e-7e58-473f-9bff-aaa6e8c3cdba/bin/uautomizer-verify-jihMAELWvX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-08 16:19:31,973 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-08 16:19:31,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-08 16:19:32,008 INFO L255 TraceCheckSpWp]: Trace formula consists of 3898 conjuncts, 266 conjuncts are in the unsatisfiable core [2024-11-08 16:19:32,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-08 16:19:33,470 INFO L134 CoverageAnalysis]: Checked inductivity of 139428 backedges. 0 proven. 139128 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-08 16:19:33,470 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-08 16:21:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 139428 backedges. 0 proven. 139128 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-11-08 16:21:06,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090273005] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-08 16:21:06,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-08 16:21:06,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [267, 267, 267] total 533 [2024-11-08 16:21:06,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637154013] [2024-11-08 16:21:06,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-08 16:21:06,026 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 533 states [2024-11-08 16:21:06,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-08 16:21:06,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 533 interpolants. [2024-11-08 16:21:06,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141778, Invalid=141778, Unknown=0, NotChecked=0, Total=283556 [2024-11-08 16:21:06,068 INFO L87 Difference]: Start difference. First operand 1164 states and 1175 transitions. Second operand has 533 states, 533 states have (on average 3.99624765478424) internal successors, (2130), 533 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)