./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-dietlibc/strrchr_short.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-dietlibc/strrchr_short.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme --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 5714449da9967bbd2918d4305e52dc9c1161024d975984886640d613abe881d1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:49:04,828 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:49:04,949 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-26 10:49:04,962 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:49:04,964 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:49:05,011 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:49:05,013 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:49:05,013 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:49:05,015 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:49:05,016 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:49:05,017 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:49:05,017 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:49:05,019 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:49:05,020 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:49:05,020 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:49:05,021 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:49:05,022 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:49:05,023 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:49:05,024 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-26 10:49:05,024 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-26 10:49:05,025 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-26 10:49:05,026 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:49:05,027 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-26 10:49:05,028 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-26 10:49:05,028 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:49:05,029 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:49:05,030 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:49:05,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:49:05,031 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:49:05,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:05,033 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:49:05,034 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:49:05,034 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:49:05,035 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:49:05,036 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:49:05,037 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:49:05,037 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:49:05,038 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:49:05,039 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_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5714449da9967bbd2918d4305e52dc9c1161024d975984886640d613abe881d1 [2023-11-26 10:49:05,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:49:05,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:49:05,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:49:05,516 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:49:05,518 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:49:05,519 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/termination-dietlibc/strrchr_short.i [2023-11-26 10:49:08,965 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:49:09,401 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:49:09,401 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/sv-benchmarks/c/termination-dietlibc/strrchr_short.i [2023-11-26 10:49:09,432 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/data/791b3b12c/5409e480f04348518e8256ec4ca9153c/FLAGb3df034ad [2023-11-26 10:49:09,454 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/data/791b3b12c/5409e480f04348518e8256ec4ca9153c [2023-11-26 10:49:09,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:49:09,469 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:49:09,472 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:09,472 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:49:09,479 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:49:09,480 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,482 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@355f2cfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09, skipping insertion in model container [2023-11-26 10:49:09,482 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,553 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:49:09,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:09,876 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:49:09,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:49:09,958 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:49:09,959 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09 WrapperNode [2023-11-26 10:49:09,959 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:49:09,960 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:09,961 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:49:09,961 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:49:09,970 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:09,984 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:10,013 INFO L138 Inliner]: procedures = 113, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2023-11-26 10:49:10,013 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:49:10,014 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:49:10,015 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:49:10,015 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:49:10,029 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:10,030 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:10,046 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:10,066 INFO L175 MemorySlicer]: Split 3 memory accesses to 1 slices as follows [3]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 1 writes are split as follows [1]. [2023-11-26 10:49:10,066 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:10,067 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:10,074 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:10,078 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:10,080 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:10,081 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:10,084 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:49:10,085 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:49:10,085 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:49:10,086 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:49:10,087 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (1/1) ... [2023-11-26 10:49:10,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:49:10,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:10,145 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:49:10,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:49:10,192 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-26 10:49:10,193 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-26 10:49:10,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-26 10:49:10,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-26 10:49:10,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:49:10,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:49:10,301 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:49:10,304 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:49:10,493 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:49:10,544 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:49:10,544 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 10:49:10,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:10 BoogieIcfgContainer [2023-11-26 10:49:10,545 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:49:10,548 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:49:10,548 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:49:10,551 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:49:10,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:49:09" (1/3) ... [2023-11-26 10:49:10,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4a59fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:10, skipping insertion in model container [2023-11-26 10:49:10,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:49:09" (2/3) ... [2023-11-26 10:49:10,553 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d4a59fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:49:10, skipping insertion in model container [2023-11-26 10:49:10,553 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:49:10" (3/3) ... [2023-11-26 10:49:10,555 INFO L112 eAbstractionObserver]: Analyzing ICFG strrchr_short.i [2023-11-26 10:49:10,579 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:49:10,579 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-11-26 10:49:10,643 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:49:10,670 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b523575, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:49:10,671 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-26 10:49:10,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 2.090909090909091) internal successors, (23), 18 states have internal predecessors, (23), 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) [2023-11-26 10:49:10,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-26 10:49:10,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:10,686 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-26 10:49:10,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:49:10,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:10,698 INFO L85 PathProgramCache]: Analyzing trace with hash 77080, now seen corresponding path program 1 times [2023-11-26 10:49:10,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:10,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906615069] [2023-11-26 10:49:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:10,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:10,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:10,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906615069] [2023-11-26 10:49:10,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906615069] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:10,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:10,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-26 10:49:10,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708735085] [2023-11-26 10:49:10,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:10,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:10,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:10,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:10,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:10,961 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 2.090909090909091) internal successors, (23), 18 states have internal predecessors, (23), 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 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-26 10:49:11,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:11,015 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2023-11-26 10:49:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:11,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2023-11-26 10:49:11,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:11,028 INFO L225 Difference]: With dead ends: 19 [2023-11-26 10:49:11,029 INFO L226 Difference]: Without dead ends: 17 [2023-11-26 10:49:11,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:11,036 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:11,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:11,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-26 10:49:11,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-26 10:49:11,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.8) internal successors, (18), 16 states have internal predecessors, (18), 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) [2023-11-26 10:49:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-26 10:49:11,077 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 3 [2023-11-26 10:49:11,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:11,078 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-26 10:49:11,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-26 10:49:11,079 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-26 10:49:11,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-26 10:49:11,080 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:11,080 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-26 10:49:11,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:49:11,081 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:49:11,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:11,082 INFO L85 PathProgramCache]: Analyzing trace with hash 77106, now seen corresponding path program 1 times [2023-11-26 10:49:11,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:11,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669049963] [2023-11-26 10:49:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:11,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:11,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:11,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:11,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669049963] [2023-11-26 10:49:11,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669049963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:11,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:11,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:49:11,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992632175] [2023-11-26 10:49:11,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:11,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:11,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:11,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:11,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:11,253 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-11-26 10:49:11,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:11,300 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2023-11-26 10:49:11,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:11,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2023-11-26 10:49:11,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:11,302 INFO L225 Difference]: With dead ends: 16 [2023-11-26 10:49:11,305 INFO L226 Difference]: Without dead ends: 16 [2023-11-26 10:49:11,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:11,308 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:11,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 9 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:11,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-26 10:49:11,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-26 10:49:11,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.7) internal successors, (17), 15 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) [2023-11-26 10:49:11,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-11-26 10:49:11,319 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 3 [2023-11-26 10:49:11,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:11,319 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-11-26 10:49:11,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-11-26 10:49:11,320 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-11-26 10:49:11,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-26 10:49:11,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:11,321 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-26 10:49:11,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-26 10:49:11,322 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:49:11,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:11,323 INFO L85 PathProgramCache]: Analyzing trace with hash 77107, now seen corresponding path program 1 times [2023-11-26 10:49:11,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:11,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358496581] [2023-11-26 10:49:11,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:11,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:11,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:11,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:11,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358496581] [2023-11-26 10:49:11,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358496581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:11,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:11,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:49:11,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872203089] [2023-11-26 10:49:11,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:11,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:49:11,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:11,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:49:11,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:49:11,731 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-11-26 10:49:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:11,764 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2023-11-26 10:49:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:49:11,765 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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 3 [2023-11-26 10:49:11,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:11,766 INFO L225 Difference]: With dead ends: 15 [2023-11-26 10:49:11,766 INFO L226 Difference]: Without dead ends: 15 [2023-11-26 10:49:11,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:49:11,769 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:11,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 9 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:11,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-26 10:49:11,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-26 10:49:11,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 14 states have internal predecessors, (16), 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) [2023-11-26 10:49:11,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-26 10:49:11,775 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 3 [2023-11-26 10:49:11,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:11,776 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-26 10:49:11,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 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) [2023-11-26 10:49:11,777 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-26 10:49:11,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-26 10:49:11,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:11,778 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:49:11,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-26 10:49:11,779 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:49:11,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:11,780 INFO L85 PathProgramCache]: Analyzing trace with hash 74136955, now seen corresponding path program 1 times [2023-11-26 10:49:11,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:11,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015550950] [2023-11-26 10:49:11,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:11,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:11,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:11,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015550950] [2023-11-26 10:49:11,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015550950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:11,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:11,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:49:11,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078956999] [2023-11-26 10:49:11,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:11,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 10:49:11,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:11,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 10:49:11,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:11,883 INFO L87 Difference]: Start difference. First operand 15 states and 16 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) [2023-11-26 10:49:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:11,912 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2023-11-26 10:49:11,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 10:49:11,913 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 [2023-11-26 10:49:11,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:11,914 INFO L225 Difference]: With dead ends: 13 [2023-11-26 10:49:11,915 INFO L226 Difference]: Without dead ends: 13 [2023-11-26 10:49:11,915 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 10:49:11,917 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:11,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 5 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:11,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-11-26 10:49:11,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-11-26 10:49:11,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 10 states have (on average 1.4) internal successors, (14), 12 states have internal predecessors, (14), 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) [2023-11-26 10:49:11,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-11-26 10:49:11,923 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 5 [2023-11-26 10:49:11,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:11,923 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-11-26 10:49:11,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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) [2023-11-26 10:49:11,924 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-11-26 10:49:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-26 10:49:11,925 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:11,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-26 10:49:11,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-26 10:49:11,926 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:49:11,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:11,927 INFO L85 PathProgramCache]: Analyzing trace with hash 74136956, now seen corresponding path program 1 times [2023-11-26 10:49:11,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:11,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847813465] [2023-11-26 10:49:11,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:11,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:12,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:12,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:12,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847813465] [2023-11-26 10:49:12,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847813465] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:12,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:12,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 10:49:12,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967027586] [2023-11-26 10:49:12,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:12,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:49:12,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:12,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:49:12,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:49:12,267 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2023-11-26 10:49:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:12,349 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2023-11-26 10:49:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:49:12,350 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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 [2023-11-26 10:49:12,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:12,353 INFO L225 Difference]: With dead ends: 19 [2023-11-26 10:49:12,353 INFO L226 Difference]: Without dead ends: 19 [2023-11-26 10:49:12,353 INFO L412 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 [2023-11-26 10:49:12,358 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:12,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 12 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:12,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-26 10:49:12,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2023-11-26 10:49:12,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 16 states have internal predecessors, (19), 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) [2023-11-26 10:49:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-11-26 10:49:12,370 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 5 [2023-11-26 10:49:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:12,372 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-11-26 10:49:12,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 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) [2023-11-26 10:49:12,373 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-11-26 10:49:12,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 10:49:12,374 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:12,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:12,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-26 10:49:12,375 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:49:12,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:12,377 INFO L85 PathProgramCache]: Analyzing trace with hash -273670618, now seen corresponding path program 1 times [2023-11-26 10:49:12,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:12,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415218523] [2023-11-26 10:49:12,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:12,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:12,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:12,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415218523] [2023-11-26 10:49:12,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415218523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:49:12,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:49:12,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 10:49:12,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416248434] [2023-11-26 10:49:12,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:49:12,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 10:49:12,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:12,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 10:49:12,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:49:12,657 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-11-26 10:49:12,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:12,686 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2023-11-26 10:49:12,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 10:49:12,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 10 [2023-11-26 10:49:12,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:12,688 INFO L225 Difference]: With dead ends: 16 [2023-11-26 10:49:12,689 INFO L226 Difference]: Without dead ends: 14 [2023-11-26 10:49:12,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 10:49:12,694 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:12,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 14 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 10:49:12,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-26 10:49:12,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-26 10:49:12,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 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) [2023-11-26 10:49:12,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-11-26 10:49:12,708 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2023-11-26 10:49:12,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:12,710 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-11-26 10:49:12,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2023-11-26 10:49:12,711 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-11-26 10:49:12,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-26 10:49:12,719 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:12,719 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:12,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-26 10:49:12,719 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:49:12,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:12,720 INFO L85 PathProgramCache]: Analyzing trace with hash -273669463, now seen corresponding path program 1 times [2023-11-26 10:49:12,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:12,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704814086] [2023-11-26 10:49:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:12,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:13,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:13,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704814086] [2023-11-26 10:49:13,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704814086] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:13,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870099955] [2023-11-26 10:49:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:13,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:13,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:13,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:13,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:49:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-26 10:49:13,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:13,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-26 10:49:13,695 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:49:13,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-26 10:49:13,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:13,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:14,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-11-26 10:49:14,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-26 10:49:14,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 10:49:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:14,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870099955] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:14,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:14,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-11-26 10:49:14,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383078414] [2023-11-26 10:49:14,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:14,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-26 10:49:14,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:14,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-26 10:49:14,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:49:14,115 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 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) [2023-11-26 10:49:14,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:14,483 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2023-11-26 10:49:14,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-26 10:49:14,484 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 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 10 [2023-11-26 10:49:14,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:14,485 INFO L225 Difference]: With dead ends: 19 [2023-11-26 10:49:14,485 INFO L226 Difference]: Without dead ends: 19 [2023-11-26 10:49:14,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-11-26 10:49:14,487 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 57 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:14,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 22 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:49:14,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-26 10:49:14,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2023-11-26 10:49:14,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2023-11-26 10:49:14,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-26 10:49:14,492 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2023-11-26 10:49:14,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:14,493 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-26 10:49:14,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 14 states have internal predecessors, (25), 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) [2023-11-26 10:49:14,493 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-26 10:49:14,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-26 10:49:14,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:14,495 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-11-26 10:49:14,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:14,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:14,703 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:49:14,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:14,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2122550884, now seen corresponding path program 2 times [2023-11-26 10:49:14,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:14,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492710861] [2023-11-26 10:49:14,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:14,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:14,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:15,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:15,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492710861] [2023-11-26 10:49:15,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492710861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:15,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704774085] [2023-11-26 10:49:15,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:49:15,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:15,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:15,498 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:15,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:49:15,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:49:15,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:15,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 10:49:15,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:15,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-26 10:49:16,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-26 10:49:16,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 32 [2023-11-26 10:49:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:16,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:17,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2023-11-26 10:49:17,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 85 [2023-11-26 10:49:17,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 10:49:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:17,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704774085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:17,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:17,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-11-26 10:49:17,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490259085] [2023-11-26 10:49:17,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:17,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-26 10:49:17,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:17,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-26 10:49:17,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2023-11-26 10:49:17,148 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 27 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 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) [2023-11-26 10:49:19,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:19,309 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2023-11-26 10:49:19,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-26 10:49:19,310 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 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) Word has length 15 [2023-11-26 10:49:19,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:19,311 INFO L225 Difference]: With dead ends: 42 [2023-11-26 10:49:19,311 INFO L226 Difference]: Without dead ends: 42 [2023-11-26 10:49:19,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2023-11-26 10:49:19,314 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 157 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:19,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 37 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:49:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-26 10:49:19,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2023-11-26 10:49:19,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2) internal successors, (36), 30 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) [2023-11-26 10:49:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-26 10:49:19,323 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2023-11-26 10:49:19,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:19,324 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-26 10:49:19,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.5384615384615385) internal successors, (40), 27 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) [2023-11-26 10:49:19,325 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-26 10:49:19,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-26 10:49:19,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:19,329 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 1, 1, 1, 1, 1] [2023-11-26 10:49:19,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:19,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-26 10:49:19,536 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:49:19,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:19,536 INFO L85 PathProgramCache]: Analyzing trace with hash -403263093, now seen corresponding path program 1 times [2023-11-26 10:49:19,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:19,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218537413] [2023-11-26 10:49:19,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:19,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:20,149 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:20,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:20,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218537413] [2023-11-26 10:49:20,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218537413] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:20,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514668411] [2023-11-26 10:49:20,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:20,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:20,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:20,152 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:20,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:49:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:20,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-26 10:49:20,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:20,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-26 10:49:22,081 INFO L349 Elim1Store]: treesize reduction 8, result has 76.5 percent of original size [2023-11-26 10:49:22,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 39 [2023-11-26 10:49:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:22,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:22,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2023-11-26 10:49:22,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2023-11-26 10:49:22,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 10:49:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:23,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514668411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:23,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:23,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 28 [2023-11-26 10:49:23,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444200354] [2023-11-26 10:49:23,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:23,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-26 10:49:23,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:23,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-26 10:49:23,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-11-26 10:49:23,004 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 29 states have internal predecessors, (55), 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) [2023-11-26 10:49:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:35,319 INFO L93 Difference]: Finished difference Result 93 states and 107 transitions. [2023-11-26 10:49:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-26 10:49:35,319 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 29 states have internal predecessors, (55), 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 20 [2023-11-26 10:49:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:35,327 INFO L225 Difference]: With dead ends: 93 [2023-11-26 10:49:35,327 INFO L226 Difference]: Without dead ends: 93 [2023-11-26 10:49:35,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2042 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=1262, Invalid=5877, Unknown=1, NotChecked=0, Total=7140 [2023-11-26 10:49:35,334 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 336 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:35,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 58 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 10:49:35,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-26 10:49:35,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 65. [2023-11-26 10:49:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.203125) internal successors, (77), 64 states have internal predecessors, (77), 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) [2023-11-26 10:49:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2023-11-26 10:49:35,359 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 20 [2023-11-26 10:49:35,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:35,360 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2023-11-26 10:49:35,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 29 states have internal predecessors, (55), 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) [2023-11-26 10:49:35,361 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2023-11-26 10:49:35,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:49:35,362 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:35,362 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 1, 1, 1, 1, 1] [2023-11-26 10:49:35,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:35,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-26 10:49:35,569 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:49:35,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:35,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1765416966, now seen corresponding path program 2 times [2023-11-26 10:49:35,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:35,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918757491] [2023-11-26 10:49:35,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:35,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:36,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:36,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918757491] [2023-11-26 10:49:36,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918757491] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:36,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738941427] [2023-11-26 10:49:36,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:49:36,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:36,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:36,470 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:36,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:49:36,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:49:36,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:36,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-26 10:49:36,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:36,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-26 10:49:37,853 INFO L349 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2023-11-26 10:49:37,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 56 treesize of output 53 [2023-11-26 10:49:37,988 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:37,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:39,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 73 [2023-11-26 10:49:39,228 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 205 treesize of output 169 [2023-11-26 10:49:39,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-26 10:49:39,277 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:49:39,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738941427] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:39,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:39,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 15] total 37 [2023-11-26 10:49:39,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143103726] [2023-11-26 10:49:39,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:39,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-26 10:49:39,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:39,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-26 10:49:39,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2023-11-26 10:49:39,282 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 38 states, 37 states have (on average 1.837837837837838) internal successors, (68), 38 states have internal predecessors, (68), 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) [2023-11-26 10:49:41,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-26 10:49:58,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:58,560 INFO L93 Difference]: Finished difference Result 185 states and 213 transitions. [2023-11-26 10:49:58,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-26 10:49:58,562 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.837837837837838) internal successors, (68), 38 states have internal predecessors, (68), 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 25 [2023-11-26 10:49:58,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:58,565 INFO L225 Difference]: With dead ends: 185 [2023-11-26 10:49:58,566 INFO L226 Difference]: Without dead ends: 185 [2023-11-26 10:49:58,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2911 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=1837, Invalid=8874, Unknown=1, NotChecked=0, Total=10712 [2023-11-26 10:49:58,575 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 171 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:58,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 125 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 770 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2023-11-26 10:49:58,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-26 10:49:58,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 113. [2023-11-26 10:49:58,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.2053571428571428) internal successors, (135), 112 states have internal predecessors, (135), 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) [2023-11-26 10:49:58,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2023-11-26 10:49:58,602 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 25 [2023-11-26 10:49:58,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:58,604 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2023-11-26 10:49:58,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.837837837837838) internal successors, (68), 38 states have internal predecessors, (68), 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) [2023-11-26 10:49:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2023-11-26 10:49:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-26 10:49:58,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:58,608 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 2, 2, 1, 1, 1, 1] [2023-11-26 10:49:58,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:58,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d46e0b0e-00c5-4f43-a9e4-a7179ce943d0/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-26 10:49:58,815 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-26 10:49:58,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:58,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1763569924, now seen corresponding path program 3 times [2023-11-26 10:49:58,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:58,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873254585] [2023-11-26 10:49:58,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:58,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:58,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat