./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrspn_reverse_alloca.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_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrspn_reverse_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya --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 5874eb83dea617c97f28746e1359ec67eb979d702b31dfbd0eb177fa26bd5d73 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-28 20:23:58,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-28 20:23:58,912 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-28 20:23:58,916 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-28 20:23:58,916 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-28 20:23:58,939 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-28 20:23:58,940 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-28 20:23:58,940 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-28 20:23:58,941 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-28 20:23:58,941 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-28 20:23:58,942 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-28 20:23:58,942 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-28 20:23:58,943 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-28 20:23:58,944 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-28 20:23:58,944 INFO L153 SettingsManager]: * Use SBE=true [2023-11-28 20:23:58,945 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-28 20:23:58,945 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-28 20:23:58,946 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-28 20:23:58,946 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-28 20:23:58,947 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-28 20:23:58,947 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-28 20:23:58,948 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-28 20:23:58,948 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-28 20:23:58,949 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-28 20:23:58,949 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-28 20:23:58,949 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-28 20:23:58,950 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-28 20:23:58,950 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-28 20:23:58,951 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-28 20:23:58,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:23:58,951 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-28 20:23:58,952 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-28 20:23:58,952 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-28 20:23:58,952 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-28 20:23:58,953 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-28 20:23:58,953 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-28 20:23:58,953 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-28 20:23:58,953 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-28 20:23:58,953 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_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5874eb83dea617c97f28746e1359ec67eb979d702b31dfbd0eb177fa26bd5d73 [2023-11-28 20:23:59,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-28 20:23:59,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-28 20:23:59,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-28 20:23:59,176 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-28 20:23:59,176 INFO L274 PluginConnector]: CDTParser initialized [2023-11-28 20:23:59,178 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/termination-15/cstrspn_reverse_alloca.i [2023-11-28 20:24:02,022 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-28 20:24:02,231 INFO L384 CDTParser]: Found 1 translation units. [2023-11-28 20:24:02,232 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/sv-benchmarks/c/termination-15/cstrspn_reverse_alloca.i [2023-11-28 20:24:02,242 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/data/64bf658d5/4d8091abb7fc4ef089f518694741cd74/FLAG1d95191c7 [2023-11-28 20:24:02,256 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/data/64bf658d5/4d8091abb7fc4ef089f518694741cd74 [2023-11-28 20:24:02,259 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-28 20:24:02,261 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-28 20:24:02,262 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-28 20:24:02,263 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-28 20:24:02,269 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-28 20:24:02,270 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:24:02" (1/1) ... [2023-11-28 20:24:02,271 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2219b9f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:02, skipping insertion in model container [2023-11-28 20:24:02,271 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 08:24:02" (1/1) ... [2023-11-28 20:24:02,311 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-28 20:24:02,581 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:24:02,592 INFO L202 MainTranslator]: Completed pre-run [2023-11-28 20:24:02,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-28 20:24:02,666 INFO L206 MainTranslator]: Completed translation [2023-11-28 20:24:02,667 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:02 WrapperNode [2023-11-28 20:24:02,667 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-28 20:24:02,668 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-28 20:24:02,669 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-28 20:24:02,669 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-28 20:24:02,676 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:02" (1/1) ... [2023-11-28 20:24:02,689 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:02" (1/1) ... [2023-11-28 20:24:02,712 INFO L138 Inliner]: procedures = 152, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-11-28 20:24:02,713 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-28 20:24:02,714 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-28 20:24:02,714 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-28 20:24:02,714 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-28 20:24:02,725 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:02" (1/1) ... [2023-11-28 20:24:02,725 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:02" (1/1) ... [2023-11-28 20:24:02,728 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:02" (1/1) ... [2023-11-28 20:24:02,742 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [3, 4]. 57 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 2 writes are split as follows [1, 1]. [2023-11-28 20:24:02,742 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:02" (1/1) ... [2023-11-28 20:24:02,742 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:02" (1/1) ... [2023-11-28 20:24:02,748 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:02" (1/1) ... [2023-11-28 20:24:02,752 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:02" (1/1) ... [2023-11-28 20:24:02,753 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:02" (1/1) ... [2023-11-28 20:24:02,754 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:02" (1/1) ... [2023-11-28 20:24:02,757 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-28 20:24:02,758 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-28 20:24:02,758 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-28 20:24:02,758 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-28 20:24:02,759 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:02" (1/1) ... [2023-11-28 20:24:02,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-28 20:24:02,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:02,787 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-28 20:24:02,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-28 20:24:02,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-28 20:24:02,826 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-28 20:24:02,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-28 20:24:02,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-28 20:24:02,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-28 20:24:02,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-28 20:24:02,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-28 20:24:02,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-28 20:24:02,905 INFO L241 CfgBuilder]: Building ICFG [2023-11-28 20:24:02,907 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-28 20:24:03,101 INFO L282 CfgBuilder]: Performing block encoding [2023-11-28 20:24:03,135 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-28 20:24:03,135 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-28 20:24:03,135 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:24:03 BoogieIcfgContainer [2023-11-28 20:24:03,136 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-28 20:24:03,139 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-28 20:24:03,139 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-28 20:24:03,142 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-28 20:24:03,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 08:24:02" (1/3) ... [2023-11-28 20:24:03,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea8f020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:24:03, skipping insertion in model container [2023-11-28 20:24:03,143 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 08:24:02" (2/3) ... [2023-11-28 20:24:03,143 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ea8f020 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 08:24:03, skipping insertion in model container [2023-11-28 20:24:03,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:24:03" (3/3) ... [2023-11-28 20:24:03,145 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrspn_reverse_alloca.i [2023-11-28 20:24:03,164 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-28 20:24:03,165 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-28 20:24:03,203 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-28 20:24:03,210 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;@65150c92, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-28 20:24:03,210 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-11-28 20:24:03,213 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 33 states have internal predecessors, (41), 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) [2023-11-28 20:24:03,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-28 20:24:03,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:03,218 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:24:03,218 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:03,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:03,224 INFO L85 PathProgramCache]: Analyzing trace with hash 107288444, now seen corresponding path program 1 times [2023-11-28 20:24:03,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:03,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733633345] [2023-11-28 20:24:03,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:03,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:03,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:03,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733633345] [2023-11-28 20:24:03,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733633345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:03,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:03,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:24:03,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421651097] [2023-11-28 20:24:03,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:03,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:24:03,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:03,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:24:03,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:24:03,551 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:03,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:03,598 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-11-28 20:24:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:24:03,601 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 [2023-11-28 20:24:03,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:03,608 INFO L225 Difference]: With dead ends: 33 [2023-11-28 20:24:03,608 INFO L226 Difference]: Without dead ends: 32 [2023-11-28 20:24:03,610 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 [2023-11-28 20:24:03,613 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:03,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:24:03,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-28 20:24:03,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-28 20:24:03,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 31 states have internal predecessors, (37), 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) [2023-11-28 20:24:03,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-11-28 20:24:03,645 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 5 [2023-11-28 20:24:03,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:03,645 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-11-28 20:24:03,645 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) [2023-11-28 20:24:03,645 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-11-28 20:24:03,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-28 20:24:03,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:03,646 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:24:03,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-28 20:24:03,647 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:03,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:03,647 INFO L85 PathProgramCache]: Analyzing trace with hash 107288445, now seen corresponding path program 1 times [2023-11-28 20:24:03,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:03,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258313454] [2023-11-28 20:24:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:03,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:03,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:03,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258313454] [2023-11-28 20:24:03,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258313454] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:03,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:03,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:24:03,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519358583] [2023-11-28 20:24:03,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:03,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:24:03,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:03,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:24:03,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:24:03,858 INFO L87 Difference]: Start difference. First operand 32 states and 37 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) [2023-11-28 20:24:03,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:03,929 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2023-11-28 20:24:03,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:24:03,930 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 [2023-11-28 20:24:03,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:03,931 INFO L225 Difference]: With dead ends: 61 [2023-11-28 20:24:03,931 INFO L226 Difference]: Without dead ends: 61 [2023-11-28 20:24:03,931 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 [2023-11-28 20:24:03,933 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:03,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 76 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:24:03,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-28 20:24:03,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 35. [2023-11-28 20:24:03,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 34 states have internal predecessors, (41), 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) [2023-11-28 20:24:03,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-11-28 20:24:03,939 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 5 [2023-11-28 20:24:03,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:03,940 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-11-28 20:24:03,940 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) [2023-11-28 20:24:03,940 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-11-28 20:24:03,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-28 20:24:03,941 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:03,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-28 20:24:03,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-28 20:24:03,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:03,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:03,942 INFO L85 PathProgramCache]: Analyzing trace with hash 107348027, now seen corresponding path program 1 times [2023-11-28 20:24:03,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:03,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941103215] [2023-11-28 20:24:03,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:03,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941103215] [2023-11-28 20:24:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941103215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:04,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:04,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:24:04,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364704055] [2023-11-28 20:24:04,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:04,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:24:04,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:04,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:24:04,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:24:04,079 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 5 states, 4 states have (on average 1.25) 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) [2023-11-28 20:24:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:04,131 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-11-28 20:24:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:24:04,132 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) 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 [2023-11-28 20:24:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:04,132 INFO L225 Difference]: With dead ends: 34 [2023-11-28 20:24:04,133 INFO L226 Difference]: Without dead ends: 34 [2023-11-28 20:24:04,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:24:04,134 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 35 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:04,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 42 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:24:04,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-28 20:24:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2023-11-28 20:24:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 2.0) 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) [2023-11-28 20:24:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2023-11-28 20:24:04,139 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 5 [2023-11-28 20:24:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:04,140 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2023-11-28 20:24:04,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) 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) [2023-11-28 20:24:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2023-11-28 20:24:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-28 20:24:04,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:04,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-28 20:24:04,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-28 20:24:04,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:04,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:04,142 INFO L85 PathProgramCache]: Analyzing trace with hash -969025543, now seen corresponding path program 1 times [2023-11-28 20:24:04,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:04,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112976215] [2023-11-28 20:24:04,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:04,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:04,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:04,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112976215] [2023-11-28 20:24:04,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112976215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:04,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:04,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:24:04,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313889537] [2023-11-28 20:24:04,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:04,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:24:04,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:04,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:24:04,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:24:04,181 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-11-28 20:24:04,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:04,208 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2023-11-28 20:24:04,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:24:04,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2023-11-28 20:24:04,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:04,209 INFO L225 Difference]: With dead ends: 30 [2023-11-28 20:24:04,209 INFO L226 Difference]: Without dead ends: 30 [2023-11-28 20:24:04,210 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 [2023-11-28 20:24:04,211 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 25 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:04,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 23 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:24:04,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-28 20:24:04,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-28 20:24:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 29 states have internal predecessors, (35), 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) [2023-11-28 20:24:04,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2023-11-28 20:24:04,216 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 6 [2023-11-28 20:24:04,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:04,216 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2023-11-28 20:24:04,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2023-11-28 20:24:04,216 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2023-11-28 20:24:04,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-28 20:24:04,217 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:04,217 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-28 20:24:04,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-28 20:24:04,217 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:04,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:04,218 INFO L85 PathProgramCache]: Analyzing trace with hash -969025542, now seen corresponding path program 1 times [2023-11-28 20:24:04,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:04,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399236877] [2023-11-28 20:24:04,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:04,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:04,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:04,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:04,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399236877] [2023-11-28 20:24:04,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399236877] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:04,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:04,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:24:04,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274216929] [2023-11-28 20:24:04,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:04,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:24:04,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:04,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:24:04,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:24:04,330 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-11-28 20:24:04,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:04,385 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2023-11-28 20:24:04,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:24:04,386 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2023-11-28 20:24:04,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:04,386 INFO L225 Difference]: With dead ends: 56 [2023-11-28 20:24:04,386 INFO L226 Difference]: Without dead ends: 56 [2023-11-28 20:24:04,387 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 [2023-11-28 20:24:04,388 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 29 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:04,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 72 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:24:04,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-28 20:24:04,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2023-11-28 20:24:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 32 states have internal predecessors, (38), 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) [2023-11-28 20:24:04,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-11-28 20:24:04,393 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 6 [2023-11-28 20:24:04,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:04,393 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-11-28 20:24:04,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-11-28 20:24:04,394 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-11-28 20:24:04,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-28 20:24:04,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:04,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-28 20:24:04,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-28 20:24:04,394 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:04,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:04,395 INFO L85 PathProgramCache]: Analyzing trace with hash -968965960, now seen corresponding path program 1 times [2023-11-28 20:24:04,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:04,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425261846] [2023-11-28 20:24:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:04,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:04,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:04,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425261846] [2023-11-28 20:24:04,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425261846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:04,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:04,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:24:04,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221538720] [2023-11-28 20:24:04,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:04,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-28 20:24:04,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:04,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-28 20:24:04,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-28 20:24:04,493 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-11-28 20:24:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:04,539 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2023-11-28 20:24:04,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-28 20:24:04,540 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2023-11-28 20:24:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:04,541 INFO L225 Difference]: With dead ends: 32 [2023-11-28 20:24:04,541 INFO L226 Difference]: Without dead ends: 32 [2023-11-28 20:24:04,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:24:04,542 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:04,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 43 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:24:04,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-28 20:24:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2023-11-28 20:24:04,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 28 states have internal predecessors, (34), 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) [2023-11-28 20:24:04,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-11-28 20:24:04,546 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 6 [2023-11-28 20:24:04,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:04,546 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-11-28 20:24:04,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-11-28 20:24:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-11-28 20:24:04,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-28 20:24:04,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:04,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:04,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-28 20:24:04,548 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:04,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:04,548 INFO L85 PathProgramCache]: Analyzing trace with hash 24981250, now seen corresponding path program 1 times [2023-11-28 20:24:04,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:04,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873253642] [2023-11-28 20:24:04,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:04,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:04,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:04,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:04,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873253642] [2023-11-28 20:24:04,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873253642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:04,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:04,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:24:04,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062711056] [2023-11-28 20:24:04,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:04,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:24:04,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:04,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:24:04,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:24:04,597 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-11-28 20:24:04,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:04,632 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2023-11-28 20:24:04,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:24:04,633 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 7 [2023-11-28 20:24:04,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:04,633 INFO L225 Difference]: With dead ends: 27 [2023-11-28 20:24:04,633 INFO L226 Difference]: Without dead ends: 27 [2023-11-28 20:24:04,634 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 [2023-11-28 20:24:04,634 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:04,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 25 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:24:04,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-28 20:24:04,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-28 20:24:04,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 26 states have internal predecessors, (32), 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) [2023-11-28 20:24:04,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-11-28 20:24:04,638 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 7 [2023-11-28 20:24:04,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:04,638 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-11-28 20:24:04,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-11-28 20:24:04,638 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-11-28 20:24:04,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-28 20:24:04,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:04,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:04,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-28 20:24:04,639 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:04,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:04,640 INFO L85 PathProgramCache]: Analyzing trace with hash 24981251, now seen corresponding path program 1 times [2023-11-28 20:24:04,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:04,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505483527] [2023-11-28 20:24:04,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:04,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:04,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:04,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505483527] [2023-11-28 20:24:04,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505483527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:04,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:04,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:24:04,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129906207] [2023-11-28 20:24:04,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:04,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:24:04,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:04,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:24:04,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:24:04,755 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 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) [2023-11-28 20:24:04,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:04,862 INFO L93 Difference]: Finished difference Result 51 states and 60 transitions. [2023-11-28 20:24:04,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:24:04,863 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 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 7 [2023-11-28 20:24:04,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:04,863 INFO L225 Difference]: With dead ends: 51 [2023-11-28 20:24:04,863 INFO L226 Difference]: Without dead ends: 51 [2023-11-28 20:24:04,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:24:04,865 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 87 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:04,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 65 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:24:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-28 20:24:04,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 31. [2023-11-28 20:24:04,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.608695652173913) internal successors, (37), 30 states have internal predecessors, (37), 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) [2023-11-28 20:24:04,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-11-28 20:24:04,869 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 7 [2023-11-28 20:24:04,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:04,869 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-11-28 20:24:04,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 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) [2023-11-28 20:24:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-11-28 20:24:04,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-28 20:24:04,870 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:04,870 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:04,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-28 20:24:04,870 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:04,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:04,871 INFO L85 PathProgramCache]: Analyzing trace with hash 82239553, now seen corresponding path program 1 times [2023-11-28 20:24:04,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:04,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951420948] [2023-11-28 20:24:04,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:04,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:05,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:05,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:05,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951420948] [2023-11-28 20:24:05,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951420948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:05,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:05,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:24:05,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084128508] [2023-11-28 20:24:05,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:05,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:24:05,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:05,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:24:05,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:24:05,144 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2023-11-28 20:24:05,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:05,226 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2023-11-28 20:24:05,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-28 20:24:05,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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 7 [2023-11-28 20:24:05,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:05,227 INFO L225 Difference]: With dead ends: 32 [2023-11-28 20:24:05,227 INFO L226 Difference]: Without dead ends: 32 [2023-11-28 20:24:05,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:24:05,228 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 71 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:05,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 43 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:24:05,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-28 20:24:05,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2023-11-28 20:24:05,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 26 states have internal predecessors, (32), 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) [2023-11-28 20:24:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-11-28 20:24:05,232 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 7 [2023-11-28 20:24:05,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:05,233 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-11-28 20:24:05,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2023-11-28 20:24:05,233 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-11-28 20:24:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-28 20:24:05,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:05,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:05,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-28 20:24:05,234 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:05,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:05,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1187081204, now seen corresponding path program 1 times [2023-11-28 20:24:05,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:05,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198785839] [2023-11-28 20:24:05,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:05,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:05,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:05,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198785839] [2023-11-28 20:24:05,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198785839] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:05,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:05,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:24:05,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941612782] [2023-11-28 20:24:05,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:05,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:24:05,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:05,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:24:05,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:24:05,293 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2023-11-28 20:24:05,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:05,334 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2023-11-28 20:24:05,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:24:05,334 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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 [2023-11-28 20:24:05,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:05,335 INFO L225 Difference]: With dead ends: 27 [2023-11-28 20:24:05,335 INFO L226 Difference]: Without dead ends: 27 [2023-11-28 20:24:05,335 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 [2023-11-28 20:24:05,336 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:05,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 26 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:24:05,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-28 20:24:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2023-11-28 20:24:05,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 23 states have internal predecessors, (29), 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) [2023-11-28 20:24:05,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-28 20:24:05,339 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 10 [2023-11-28 20:24:05,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:05,340 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-28 20:24:05,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 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) [2023-11-28 20:24:05,340 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-28 20:24:05,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-28 20:24:05,340 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:05,341 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:05,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-28 20:24:05,341 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:05,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:05,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1187081205, now seen corresponding path program 1 times [2023-11-28 20:24:05,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:05,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354044581] [2023-11-28 20:24:05,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:05,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:05,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:05,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:05,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354044581] [2023-11-28 20:24:05,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354044581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:05,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:05,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:24:05,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966981954] [2023-11-28 20:24:05,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:05,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-28 20:24:05,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:05,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-28 20:24:05,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-28 20:24:05,480 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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) [2023-11-28 20:24:05,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:05,584 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2023-11-28 20:24:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:24:05,585 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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 [2023-11-28 20:24:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:05,585 INFO L225 Difference]: With dead ends: 48 [2023-11-28 20:24:05,585 INFO L226 Difference]: Without dead ends: 48 [2023-11-28 20:24:05,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:24:05,586 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 78 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:05,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 54 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:24:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-28 20:24:05,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2023-11-28 20:24:05,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 35 states have internal predecessors, (47), 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) [2023-11-28 20:24:05,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2023-11-28 20:24:05,590 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 10 [2023-11-28 20:24:05,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:05,590 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2023-11-28 20:24:05,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 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) [2023-11-28 20:24:05,591 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2023-11-28 20:24:05,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-28 20:24:05,591 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:05,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:05,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-28 20:24:05,592 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:05,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:05,592 INFO L85 PathProgramCache]: Analyzing trace with hash 377734579, now seen corresponding path program 1 times [2023-11-28 20:24:05,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:05,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286065285] [2023-11-28 20:24:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:05,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:05,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:05,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286065285] [2023-11-28 20:24:05,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286065285] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:05,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:05,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-28 20:24:05,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726932730] [2023-11-28 20:24:05,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:05,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:24:05,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:05,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:24:05,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:24:05,783 INFO L87 Difference]: Start difference. First operand 36 states and 47 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2023-11-28 20:24:05,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:05,868 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2023-11-28 20:24:05,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:24:05,868 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 [2023-11-28 20:24:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:05,869 INFO L225 Difference]: With dead ends: 41 [2023-11-28 20:24:05,869 INFO L226 Difference]: Without dead ends: 41 [2023-11-28 20:24:05,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-28 20:24:05,869 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:05,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 34 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:24:05,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-28 20:24:05,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 23. [2023-11-28 20:24:05,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.4) internal successors, (28), 22 states have internal predecessors, (28), 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) [2023-11-28 20:24:05,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-11-28 20:24:05,872 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 10 [2023-11-28 20:24:05,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:05,873 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-11-28 20:24:05,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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) [2023-11-28 20:24:05,873 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-11-28 20:24:05,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-28 20:24:05,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:05,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:05,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-28 20:24:05,874 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:05,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:05,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1855256335, now seen corresponding path program 1 times [2023-11-28 20:24:05,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:05,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887582490] [2023-11-28 20:24:05,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:05,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:05,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:05,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887582490] [2023-11-28 20:24:05,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887582490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:05,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:05,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-28 20:24:05,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146064736] [2023-11-28 20:24:05,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:05,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-28 20:24:05,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:05,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-28 20:24:05,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-28 20:24:05,974 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:06,001 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2023-11-28 20:24:06,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-28 20:24:06,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-28 20:24:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:06,002 INFO L225 Difference]: With dead ends: 22 [2023-11-28 20:24:06,002 INFO L226 Difference]: Without dead ends: 19 [2023-11-28 20:24:06,002 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 [2023-11-28 20:24:06,003 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:06,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:24:06,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-28 20:24:06,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-28 20:24:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.3529411764705883) 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) [2023-11-28 20:24:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-11-28 20:24:06,006 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2023-11-28 20:24:06,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:06,006 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-11-28 20:24:06,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:06,006 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-11-28 20:24:06,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-28 20:24:06,007 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:06,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:06,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-28 20:24:06,007 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:06,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:06,008 INFO L85 PathProgramCache]: Analyzing trace with hash -423172507, now seen corresponding path program 1 times [2023-11-28 20:24:06,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:06,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123849581] [2023-11-28 20:24:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:06,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:06,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:06,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:06,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123849581] [2023-11-28 20:24:06,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123849581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:06,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:06,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-28 20:24:06,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933483073] [2023-11-28 20:24:06,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:06,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-28 20:24:06,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:06,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-28 20:24:06,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:24:06,032 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:06,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:06,046 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-11-28 20:24:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-28 20:24:06,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-28 20:24:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:06,047 INFO L225 Difference]: With dead ends: 20 [2023-11-28 20:24:06,047 INFO L226 Difference]: Without dead ends: 20 [2023-11-28 20:24:06,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-28 20:24:06,048 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:06,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:24:06,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-28 20:24:06,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-28 20:24:06,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 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) [2023-11-28 20:24:06,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-11-28 20:24:06,050 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2023-11-28 20:24:06,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:06,051 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-11-28 20:24:06,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:06,051 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-11-28 20:24:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-28 20:24:06,052 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:06,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:06,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-28 20:24:06,052 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:06,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:06,053 INFO L85 PathProgramCache]: Analyzing trace with hash -233596166, now seen corresponding path program 1 times [2023-11-28 20:24:06,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:06,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984884863] [2023-11-28 20:24:06,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:06,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:06,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:06,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984884863] [2023-11-28 20:24:06,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984884863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:06,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:06,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-28 20:24:06,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826336824] [2023-11-28 20:24:06,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:06,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:24:06,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:06,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:24:06,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-28 20:24:06,209 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2023-11-28 20:24:06,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:06,297 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-11-28 20:24:06,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-28 20:24:06,297 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) Word has length 14 [2023-11-28 20:24:06,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:06,298 INFO L225 Difference]: With dead ends: 34 [2023-11-28 20:24:06,298 INFO L226 Difference]: Without dead ends: 34 [2023-11-28 20:24:06,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-28 20:24:06,299 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:06,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 51 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:24:06,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-28 20:24:06,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-11-28 20:24:06,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 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) [2023-11-28 20:24:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-11-28 20:24:06,302 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 14 [2023-11-28 20:24:06,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:06,302 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-11-28 20:24:06,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2023-11-28 20:24:06,302 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-11-28 20:24:06,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-28 20:24:06,303 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:06,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:06,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-28 20:24:06,303 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:06,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash 24569272, now seen corresponding path program 1 times [2023-11-28 20:24:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:06,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013059900] [2023-11-28 20:24:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:06,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:06,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:06,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013059900] [2023-11-28 20:24:06,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013059900] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:24:06,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608812338] [2023-11-28 20:24:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:06,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:06,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:06,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:06,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-28 20:24:06,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:06,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-28 20:24:06,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:06,705 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 11 treesize of output 7 [2023-11-28 20:24:06,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-28 20:24:06,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-28 20:24:06,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608812338] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:06,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-28 20:24:06,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2023-11-28 20:24:06,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275414298] [2023-11-28 20:24:06,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:06,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-28 20:24:06,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:06,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-28 20:24:06,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:24:06,776 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2023-11-28 20:24:06,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:06,845 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2023-11-28 20:24:06,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-28 20:24:06,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) Word has length 14 [2023-11-28 20:24:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:06,846 INFO L225 Difference]: With dead ends: 43 [2023-11-28 20:24:06,846 INFO L226 Difference]: Without dead ends: 32 [2023-11-28 20:24:06,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-11-28 20:24:06,847 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 4 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:06,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 57 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:24:06,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-28 20:24:06,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-28 20:24:06,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.2) internal successors, (36), 31 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) [2023-11-28 20:24:06,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-11-28 20:24:06,849 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 14 [2023-11-28 20:24:06,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:06,850 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-11-28 20:24:06,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2023-11-28 20:24:06,850 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-11-28 20:24:06,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-28 20:24:06,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:06,851 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:06,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-28 20:24:07,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-28 20:24:07,057 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:07,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:07,058 INFO L85 PathProgramCache]: Analyzing trace with hash -562236742, now seen corresponding path program 1 times [2023-11-28 20:24:07,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:07,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675780129] [2023-11-28 20:24:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:07,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:07,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:07,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675780129] [2023-11-28 20:24:07,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675780129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:24:07,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506784207] [2023-11-28 20:24:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:07,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:07,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:07,302 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:07,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-28 20:24:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:07,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-28 20:24:07,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:07,417 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 11 treesize of output 7 [2023-11-28 20:24:07,541 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:24:07,541 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 29 treesize of output 25 [2023-11-28 20:24:07,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:07,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:24:07,685 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 7 treesize of output 5 [2023-11-28 20:24:07,783 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 10 treesize of output 8 [2023-11-28 20:24:07,789 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 14 treesize of output 12 [2023-11-28 20:24:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:07,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506784207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:24:07,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:24:07,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-28 20:24:07,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692959145] [2023-11-28 20:24:07,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:24:07,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-28 20:24:07,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:07,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-28 20:24:07,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-28 20:24:07,818 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 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) [2023-11-28 20:24:08,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:08,247 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2023-11-28 20:24:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 20:24:08,248 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 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 14 [2023-11-28 20:24:08,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:08,250 INFO L225 Difference]: With dead ends: 58 [2023-11-28 20:24:08,250 INFO L226 Difference]: Without dead ends: 58 [2023-11-28 20:24:08,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=533, Unknown=0, NotChecked=0, Total=702 [2023-11-28 20:24:08,251 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 125 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:08,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 44 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:24:08,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-28 20:24:08,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 36. [2023-11-28 20:24:08,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 35 states have internal predecessors, (42), 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) [2023-11-28 20:24:08,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-11-28 20:24:08,254 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 14 [2023-11-28 20:24:08,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:08,255 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-11-28 20:24:08,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 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) [2023-11-28 20:24:08,255 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-11-28 20:24:08,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-28 20:24:08,256 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:08,256 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:08,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-28 20:24:08,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-28 20:24:08,461 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:08,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:08,461 INFO L85 PathProgramCache]: Analyzing trace with hash 341959099, now seen corresponding path program 1 times [2023-11-28 20:24:08,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:08,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642229905] [2023-11-28 20:24:08,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:08,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:08,560 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:08,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:08,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642229905] [2023-11-28 20:24:08,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642229905] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-28 20:24:08,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-28 20:24:08,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-28 20:24:08,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410283664] [2023-11-28 20:24:08,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-28 20:24:08,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-28 20:24:08,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:08,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-28 20:24:08,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-11-28 20:24:08,562 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:08,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:08,665 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2023-11-28 20:24:08,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-28 20:24:08,666 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-28 20:24:08,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:08,667 INFO L225 Difference]: With dead ends: 39 [2023-11-28 20:24:08,667 INFO L226 Difference]: Without dead ends: 25 [2023-11-28 20:24:08,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-28 20:24:08,668 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:08,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 47 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-28 20:24:08,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-28 20:24:08,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-11-28 20:24:08,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 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) [2023-11-28 20:24:08,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-11-28 20:24:08,670 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2023-11-28 20:24:08,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:08,671 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-11-28 20:24:08,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-28 20:24:08,671 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-11-28 20:24:08,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-28 20:24:08,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:08,672 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:08,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-28 20:24:08,672 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:08,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:08,673 INFO L85 PathProgramCache]: Analyzing trace with hash 856332690, now seen corresponding path program 1 times [2023-11-28 20:24:08,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:08,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294985366] [2023-11-28 20:24:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:08,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:08,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:08,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:08,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294985366] [2023-11-28 20:24:08,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294985366] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:24:08,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513562541] [2023-11-28 20:24:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:08,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:08,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:08,862 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:08,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-28 20:24:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:08,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-28 20:24:08,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:08,958 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 11 treesize of output 7 [2023-11-28 20:24:09,021 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:24:09,022 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 15 treesize of output 15 [2023-11-28 20:24:09,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-28 20:24:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:09,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:24:09,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-28 20:24:09,440 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 [2023-11-28 20:24:09,450 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 10 treesize of output 8 [2023-11-28 20:24:09,454 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 14 treesize of output 12 [2023-11-28 20:24:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:09,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513562541] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:24:09,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:24:09,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 21 [2023-11-28 20:24:09,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404114830] [2023-11-28 20:24:09,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:24:09,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-28 20:24:09,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:09,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-28 20:24:09,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-11-28 20:24:09,467 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 22 states have internal predecessors, (38), 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) [2023-11-28 20:24:09,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:09,882 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-11-28 20:24:09,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-28 20:24:09,883 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 22 states have internal predecessors, (38), 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 16 [2023-11-28 20:24:09,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:09,883 INFO L225 Difference]: With dead ends: 36 [2023-11-28 20:24:09,883 INFO L226 Difference]: Without dead ends: 36 [2023-11-28 20:24:09,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2023-11-28 20:24:09,885 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 44 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:09,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 34 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-28 20:24:09,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-28 20:24:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 21. [2023-11-28 20:24:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 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) [2023-11-28 20:24:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-11-28 20:24:09,887 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2023-11-28 20:24:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:09,887 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-11-28 20:24:09,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 22 states have internal predecessors, (38), 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) [2023-11-28 20:24:09,887 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-11-28 20:24:09,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-28 20:24:09,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-28 20:24:09,888 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:09,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-28 20:24:10,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:10,088 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-28 20:24:10,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-28 20:24:10,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1619773633, now seen corresponding path program 2 times [2023-11-28 20:24:10,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-28 20:24:10,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498608531] [2023-11-28 20:24:10,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-28 20:24:10,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-28 20:24:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-28 20:24:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:10,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-28 20:24:10,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498608531] [2023-11-28 20:24:10,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498608531] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-28 20:24:10,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429664842] [2023-11-28 20:24:10,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-28 20:24:10,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:10,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-28 20:24:10,392 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-28 20:24:10,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-28 20:24:10,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-28 20:24:10,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-28 20:24:10,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-28 20:24:10,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-28 20:24:10,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2023-11-28 20:24:10,502 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 11 treesize of output 7 [2023-11-28 20:24:10,559 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-28 20:24:10,559 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 29 treesize of output 25 [2023-11-28 20:24:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:10,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-28 20:24:10,903 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 10 treesize of output 8 [2023-11-28 20:24:10,908 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 14 treesize of output 12 [2023-11-28 20:24:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-28 20:24:10,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429664842] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-28 20:24:10,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-28 20:24:10,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-28 20:24:10,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320046488] [2023-11-28 20:24:10,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-28 20:24:10,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-28 20:24:10,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-28 20:24:10,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-28 20:24:10,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-11-28 20:24:10,944 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 21 states have internal predecessors, (39), 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) [2023-11-28 20:24:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-28 20:24:11,246 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2023-11-28 20:24:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-28 20:24:11,247 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 21 states have internal predecessors, (39), 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 18 [2023-11-28 20:24:11,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-28 20:24:11,247 INFO L225 Difference]: With dead ends: 33 [2023-11-28 20:24:11,247 INFO L226 Difference]: Without dead ends: 0 [2023-11-28 20:24:11,248 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2023-11-28 20:24:11,249 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-28 20:24:11,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 56 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-28 20:24:11,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-28 20:24:11,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-28 20:24:11,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2023-11-28 20:24:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-28 20:24:11,250 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2023-11-28 20:24:11,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-28 20:24:11,250 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-28 20:24:11,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 21 states have internal predecessors, (39), 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) [2023-11-28 20:24:11,251 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-28 20:24:11,251 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-28 20:24:11,253 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 15 remaining) [2023-11-28 20:24:11,254 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 15 remaining) [2023-11-28 20:24:11,254 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2023-11-28 20:24:11,254 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2023-11-28 20:24:11,254 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2023-11-28 20:24:11,254 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2023-11-28 20:24:11,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2023-11-28 20:24:11,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2023-11-28 20:24:11,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2023-11-28 20:24:11,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2023-11-28 20:24:11,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2023-11-28 20:24:11,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 15 remaining) [2023-11-28 20:24:11,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 15 remaining) [2023-11-28 20:24:11,255 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 15 remaining) [2023-11-28 20:24:11,256 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2023-11-28 20:24:11,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-28 20:24:11,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-28 20:24:11,463 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-28 20:24:11,465 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-28 20:24:11,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 08:24:11 BoogieIcfgContainer [2023-11-28 20:24:11,467 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-28 20:24:11,467 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-28 20:24:11,467 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-28 20:24:11,467 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-28 20:24:11,468 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 08:24:03" (3/4) ... [2023-11-28 20:24:11,469 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-28 20:24:11,475 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2023-11-28 20:24:11,475 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-28 20:24:11,475 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-28 20:24:11,475 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-28 20:24:11,566 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-28 20:24:11,567 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-28 20:24:11,567 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-28 20:24:11,568 INFO L158 Benchmark]: Toolchain (without parser) took 9306.68ms. Allocated memory was 165.7MB in the beginning and 239.1MB in the end (delta: 73.4MB). Free memory was 126.6MB in the beginning and 110.0MB in the end (delta: 16.6MB). Peak memory consumption was 91.5MB. Max. memory is 16.1GB. [2023-11-28 20:24:11,568 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory is still 64.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-28 20:24:11,568 INFO L158 Benchmark]: CACSL2BoogieTranslator took 405.05ms. Allocated memory is still 165.7MB. Free memory was 126.6MB in the beginning and 108.3MB in the end (delta: 18.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-28 20:24:11,569 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.71ms. Allocated memory is still 165.7MB. Free memory was 108.3MB in the beginning and 106.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-28 20:24:11,569 INFO L158 Benchmark]: Boogie Preprocessor took 43.42ms. Allocated memory is still 165.7MB. Free memory was 106.4MB in the beginning and 104.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-28 20:24:11,569 INFO L158 Benchmark]: RCFGBuilder took 377.97ms. Allocated memory is still 165.7MB. Free memory was 104.0MB in the beginning and 88.0MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-28 20:24:11,570 INFO L158 Benchmark]: TraceAbstraction took 8328.22ms. Allocated memory was 165.7MB in the beginning and 239.1MB in the end (delta: 73.4MB). Free memory was 87.5MB in the beginning and 115.0MB in the end (delta: -27.5MB). Peak memory consumption was 49.5MB. Max. memory is 16.1GB. [2023-11-28 20:24:11,570 INFO L158 Benchmark]: Witness Printer took 99.81ms. Allocated memory is still 239.1MB. Free memory was 114.0MB in the beginning and 110.0MB in the end (delta: 4.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-28 20:24:11,572 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory is still 64.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 405.05ms. Allocated memory is still 165.7MB. Free memory was 126.6MB in the beginning and 108.3MB in the end (delta: 18.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.71ms. Allocated memory is still 165.7MB. Free memory was 108.3MB in the beginning and 106.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.42ms. Allocated memory is still 165.7MB. Free memory was 106.4MB in the beginning and 104.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 377.97ms. Allocated memory is still 165.7MB. Free memory was 104.0MB in the beginning and 88.0MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 8328.22ms. Allocated memory was 165.7MB in the beginning and 239.1MB in the end (delta: 73.4MB). Free memory was 87.5MB in the beginning and 115.0MB in the end (delta: -27.5MB). Peak memory consumption was 49.5MB. Max. memory is 16.1GB. * Witness Printer took 99.81ms. Allocated memory is still 239.1MB. Free memory was 114.0MB in the beginning and 110.0MB in the end (delta: 4.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 379]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 34 locations, 15 error locations. Started 1 CEGAR loops. OverallTime: 8.3s, OverallIterations: 20, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 846 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 846 mSDsluCounter, 869 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 550 mSDsCounter, 44 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1216 IncrementalHoareTripleChecker+Invalid, 1260 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 44 mSolverCounterUnsat, 319 mSDtfsCounter, 1216 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 252 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=11, InterpolantAutomatonStates: 134, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 154 StatesRemovedByMinimization, 13 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 261 NumberOfCodeBlocks, 261 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 282 ConstructedInterpolants, 9 QuantifiedInterpolants, 2314 SizeOfPredicates, 55 NumberOfNonLiveVariables, 526 ConjunctsInSsa, 121 ConjunctsInUnsatCore, 27 InterpolantComputations, 17 PerfectInterpolantSequences, 5/29 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 15 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-28 20:24:11,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4099e99f-6441-423f-bc9c-bcad350abc58/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE