./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-15/cstrcmp_mixed_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_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/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_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-15/cstrcmp_mixed_alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/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_89508988-33be-4479-bd23-9876fbcf9020/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 577a2eb90f91f4aea793f8d739939ae3b3095098d9dbb2adc1dcfe3938a7037f --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:51:52,818 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:51:52,904 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-29 00:51:52,910 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:51:52,911 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:51:52,937 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:51:52,937 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:51:52,938 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:51:52,939 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:51:52,939 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:51:52,940 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:51:52,940 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:51:52,941 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:51:52,942 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:51:52,942 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:51:52,943 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:51:52,943 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:51:52,944 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:51:52,944 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:51:52,945 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:51:52,945 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:51:52,946 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:51:52,947 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:51:52,947 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:51:52,947 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:51:52,948 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:51:52,948 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:51:52,949 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:51:52,949 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:51:52,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:51:52,950 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:51:52,950 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:51:52,951 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:51:52,951 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:51:52,951 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:51:52,951 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:51:52,951 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:51:52,952 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:51:52,952 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_89508988-33be-4479-bd23-9876fbcf9020/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 577a2eb90f91f4aea793f8d739939ae3b3095098d9dbb2adc1dcfe3938a7037f [2023-11-29 00:51:53,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:51:53,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:51:53,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:51:53,196 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:51:53,197 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:51:53,198 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/termination-15/cstrcmp_mixed_alloca.i [2023-11-29 00:51:55,952 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:51:56,209 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:51:56,210 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/sv-benchmarks/c/termination-15/cstrcmp_mixed_alloca.i [2023-11-29 00:51:56,220 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/data/e0f644fa0/20557f6d9742447994b1e252f94dbf91/FLAG8f9852a38 [2023-11-29 00:51:56,232 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/data/e0f644fa0/20557f6d9742447994b1e252f94dbf91 [2023-11-29 00:51:56,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:51:56,236 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:51:56,237 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:51:56,237 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:51:56,241 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:51:56,242 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:51:56" (1/1) ... [2023-11-29 00:51:56,243 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27261c49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:56, skipping insertion in model container [2023-11-29 00:51:56,243 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:51:56" (1/1) ... [2023-11-29 00:51:56,279 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:51:56,524 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:51:56,534 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:51:56,570 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:51:56,598 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:51:56,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:56 WrapperNode [2023-11-29 00:51:56,598 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:51:56,599 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:51:56,600 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:51:56,600 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:51:56,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:56" (1/1) ... [2023-11-29 00:51:56,617 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:56" (1/1) ... [2023-11-29 00:51:56,638 INFO L138 Inliner]: procedures = 152, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 72 [2023-11-29 00:51:56,638 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:51:56,639 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:51:56,639 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:51:56,639 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:51:56,647 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:56" (1/1) ... [2023-11-29 00:51:56,647 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:56" (1/1) ... [2023-11-29 00:51:56,650 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:56" (1/1) ... [2023-11-29 00:51:56,662 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]. [2023-11-29 00:51:56,663 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:56" (1/1) ... [2023-11-29 00:51:56,663 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:56" (1/1) ... [2023-11-29 00:51:56,669 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:56" (1/1) ... [2023-11-29 00:51:56,672 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:56" (1/1) ... [2023-11-29 00:51:56,673 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:56" (1/1) ... [2023-11-29 00:51:56,674 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:56" (1/1) ... [2023-11-29 00:51:56,677 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:51:56,678 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:51:56,678 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:51:56,678 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:51:56,679 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:56" (1/1) ... [2023-11-29 00:51:56,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:51:56,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:56,707 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:51:56,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:51:56,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:51:56,744 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 00:51:56,744 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:51:56,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 00:51:56,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:51:56,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:51:56,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:51:56,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:51:56,831 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:51:56,833 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:51:57,026 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:51:57,071 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:51:57,072 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:51:57,072 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:51:57 BoogieIcfgContainer [2023-11-29 00:51:57,072 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:51:57,075 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:51:57,075 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:51:57,078 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:51:57,079 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:51:56" (1/3) ... [2023-11-29 00:51:57,079 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bd5e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:51:57, skipping insertion in model container [2023-11-29 00:51:57,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:51:56" (2/3) ... [2023-11-29 00:51:57,080 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53bd5e77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:51:57, skipping insertion in model container [2023-11-29 00:51:57,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:51:57" (3/3) ... [2023-11-29 00:51:57,081 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcmp_mixed_alloca.i [2023-11-29 00:51:57,100 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:51:57,101 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-11-29 00:51:57,147 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:51:57,154 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;@b97285d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:51:57,155 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-11-29 00:51:57,159 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 29 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) [2023-11-29 00:51:57,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 00:51:57,165 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:57,166 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 00:51:57,166 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)] === [2023-11-29 00:51:57,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:57,172 INFO L85 PathProgramCache]: Analyzing trace with hash 90665066, now seen corresponding path program 1 times [2023-11-29 00:51:57,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:57,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234354666] [2023-11-29 00:51:57,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:57,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:57,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:57,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:57,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234354666] [2023-11-29 00:51:57,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234354666] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:57,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:57,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:51:57,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536186467] [2023-11-29 00:51:57,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:57,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:51:57,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:57,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:51:57,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:51:57,525 INFO L87 Difference]: Start difference. First operand has 30 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 29 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) 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) [2023-11-29 00:51:57,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:57,568 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-11-29 00:51:57,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:51:57,570 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 [2023-11-29 00:51:57,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:57,576 INFO L225 Difference]: With dead ends: 29 [2023-11-29 00:51:57,576 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 00:51:57,577 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 [2023-11-29 00:51:57,580 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:57,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 20 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:51:57,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 00:51:57,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-29 00:51:57,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 27 states have internal predecessors, (31), 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) [2023-11-29 00:51:57,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-11-29 00:51:57,605 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 5 [2023-11-29 00:51:57,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:57,605 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-11-29 00:51:57,605 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) [2023-11-29 00:51:57,605 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-11-29 00:51:57,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 00:51:57,606 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:57,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 00:51:57,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:51:57,606 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)] === [2023-11-29 00:51:57,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:57,607 INFO L85 PathProgramCache]: Analyzing trace with hash 90665067, now seen corresponding path program 1 times [2023-11-29 00:51:57,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:57,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409044431] [2023-11-29 00:51:57,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:57,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:57,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:57,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409044431] [2023-11-29 00:51:57,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409044431] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:57,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:57,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:51:57,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061092398] [2023-11-29 00:51:57,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:57,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:51:57,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:57,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:51:57,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:51:57,860 INFO L87 Difference]: Start difference. First operand 28 states and 31 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) [2023-11-29 00:51:57,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:57,947 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2023-11-29 00:51:57,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:51:57,948 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 [2023-11-29 00:51:57,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:57,949 INFO L225 Difference]: With dead ends: 53 [2023-11-29 00:51:57,950 INFO L226 Difference]: Without dead ends: 53 [2023-11-29 00:51:57,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:51:57,952 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:57,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 49 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:51:57,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-29 00:51:57,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 31. [2023-11-29 00:51:57,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 30 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) [2023-11-29 00:51:57,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-29 00:51:57,959 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2023-11-29 00:51:57,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:57,959 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-29 00:51:57,959 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) [2023-11-29 00:51:57,960 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-29 00:51:57,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 00:51:57,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:57,960 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 00:51:57,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:51:57,961 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)] === [2023-11-29 00:51:57,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:57,962 INFO L85 PathProgramCache]: Analyzing trace with hash 90724649, now seen corresponding path program 1 times [2023-11-29 00:51:57,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:57,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206743697] [2023-11-29 00:51:57,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:57,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:58,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:58,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206743697] [2023-11-29 00:51:58,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206743697] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:58,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:58,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:51:58,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541625497] [2023-11-29 00:51:58,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:58,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:51:58,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:58,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:51:58,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:51:58,136 INFO L87 Difference]: Start difference. First operand 31 states and 35 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) [2023-11-29 00:51:58,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:58,176 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-11-29 00:51:58,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:51:58,176 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 [2023-11-29 00:51:58,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:58,177 INFO L225 Difference]: With dead ends: 30 [2023-11-29 00:51:58,177 INFO L226 Difference]: Without dead ends: 30 [2023-11-29 00:51:58,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:51:58,179 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:58,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 15 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:51:58,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-29 00:51:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2023-11-29 00:51:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 2.142857142857143) internal successors, (30), 26 states have internal predecessors, (30), 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) [2023-11-29 00:51:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-11-29 00:51:58,184 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 5 [2023-11-29 00:51:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:58,184 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-11-29 00:51:58,185 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) [2023-11-29 00:51:58,185 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-11-29 00:51:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 00:51:58,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:58,185 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:51:58,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:51:58,186 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)] === [2023-11-29 00:51:58,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:58,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1484350261, now seen corresponding path program 1 times [2023-11-29 00:51:58,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:58,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766808673] [2023-11-29 00:51:58,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:58,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:58,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:58,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:58,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766808673] [2023-11-29 00:51:58,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766808673] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:58,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:58,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:51:58,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525104512] [2023-11-29 00:51:58,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:58,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:51:58,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:58,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:51:58,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:51:58,226 INFO L87 Difference]: Start difference. First operand 27 states and 30 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) [2023-11-29 00:51:58,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:58,250 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-11-29 00:51:58,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:51:58,251 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 [2023-11-29 00:51:58,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:58,252 INFO L225 Difference]: With dead ends: 26 [2023-11-29 00:51:58,252 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 00:51:58,252 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 [2023-11-29 00:51:58,253 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:58,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 19 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:51:58,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 00:51:58,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-29 00:51:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 25 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) [2023-11-29 00:51:58,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-29 00:51:58,258 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 6 [2023-11-29 00:51:58,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:58,258 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-29 00:51:58,259 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) [2023-11-29 00:51:58,259 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-29 00:51:58,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 00:51:58,259 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:58,259 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:51:58,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:51:58,260 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)] === [2023-11-29 00:51:58,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:58,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1484350260, now seen corresponding path program 1 times [2023-11-29 00:51:58,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:58,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540671805] [2023-11-29 00:51:58,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:58,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:58,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:58,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540671805] [2023-11-29 00:51:58,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540671805] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:58,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:58,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:51:58,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767787403] [2023-11-29 00:51:58,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:58,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:51:58,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:58,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:51:58,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:51:58,381 INFO L87 Difference]: Start difference. First operand 26 states and 29 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) [2023-11-29 00:51:58,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:58,447 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2023-11-29 00:51:58,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:51:58,448 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 [2023-11-29 00:51:58,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:58,449 INFO L225 Difference]: With dead ends: 48 [2023-11-29 00:51:58,449 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 00:51:58,449 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 [2023-11-29 00:51:58,450 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:58,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 55 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:51:58,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 00:51:58,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2023-11-29 00:51:58,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 28 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) [2023-11-29 00:51:58,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-29 00:51:58,456 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 6 [2023-11-29 00:51:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:58,457 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-29 00:51:58,457 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) [2023-11-29 00:51:58,457 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-29 00:51:58,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 00:51:58,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:58,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:51:58,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:51:58,458 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)] === [2023-11-29 00:51:58,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:58,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1484290678, now seen corresponding path program 1 times [2023-11-29 00:51:58,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:58,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540497375] [2023-11-29 00:51:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:58,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:58,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:58,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540497375] [2023-11-29 00:51:58,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540497375] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:58,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:58,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:51:58,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219819262] [2023-11-29 00:51:58,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:58,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:51:58,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:58,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:51:58,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:51:58,577 INFO L87 Difference]: Start difference. First operand 29 states and 32 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) [2023-11-29 00:51:58,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:58,628 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2023-11-29 00:51:58,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:51:58,629 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 [2023-11-29 00:51:58,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:58,630 INFO L225 Difference]: With dead ends: 28 [2023-11-29 00:51:58,630 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 00:51:58,630 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 [2023-11-29 00:51:58,631 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:58,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 32 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:51:58,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 00:51:58,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2023-11-29 00:51:58,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 14 states have (on average 2.0) internal successors, (28), 24 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) [2023-11-29 00:51:58,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-11-29 00:51:58,636 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 6 [2023-11-29 00:51:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:58,636 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-11-29 00:51:58,636 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) [2023-11-29 00:51:58,637 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-11-29 00:51:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 00:51:58,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:58,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:58,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 00:51:58,638 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)] === [2023-11-29 00:51:58,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:58,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1229783619, now seen corresponding path program 1 times [2023-11-29 00:51:58,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:58,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190798706] [2023-11-29 00:51:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:58,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:58,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:58,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:58,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:58,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190798706] [2023-11-29 00:51:58,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190798706] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:58,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:58,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:51:58,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097109493] [2023-11-29 00:51:58,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:58,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:51:58,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:58,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:51:58,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:51:58,692 INFO L87 Difference]: Start difference. First operand 25 states and 28 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) [2023-11-29 00:51:58,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:58,736 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2023-11-29 00:51:58,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:51:58,737 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 [2023-11-29 00:51:58,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:58,737 INFO L225 Difference]: With dead ends: 22 [2023-11-29 00:51:58,738 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 00:51:58,738 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 [2023-11-29 00:51:58,739 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:58,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 19 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:51:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 00:51:58,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-29 00:51:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 21 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) [2023-11-29 00:51:58,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-11-29 00:51:58,743 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 7 [2023-11-29 00:51:58,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:58,743 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-11-29 00:51:58,743 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) [2023-11-29 00:51:58,744 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-11-29 00:51:58,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 00:51:58,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:58,744 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:58,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 00:51:58,745 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)] === [2023-11-29 00:51:58,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:58,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1229783620, now seen corresponding path program 1 times [2023-11-29 00:51:58,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:58,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422427692] [2023-11-29 00:51:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:58,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:58,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:58,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422427692] [2023-11-29 00:51:58,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422427692] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:58,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:58,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 00:51:58,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044933969] [2023-11-29 00:51:58,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:58,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:51:58,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:58,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:51:58,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:51:58,878 INFO L87 Difference]: Start difference. First operand 22 states and 25 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) [2023-11-29 00:51:58,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:58,969 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2023-11-29 00:51:58,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:51:58,969 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 [2023-11-29 00:51:58,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:58,970 INFO L225 Difference]: With dead ends: 33 [2023-11-29 00:51:58,970 INFO L226 Difference]: Without dead ends: 33 [2023-11-29 00:51:58,971 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 [2023-11-29 00:51:58,972 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 107 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:58,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 26 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:51:58,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-29 00:51:58,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2023-11-29 00:51:58,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.75) internal successors, (35), 27 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) [2023-11-29 00:51:58,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2023-11-29 00:51:58,977 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 7 [2023-11-29 00:51:58,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:58,977 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2023-11-29 00:51:58,977 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) [2023-11-29 00:51:58,978 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-11-29 00:51:58,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 00:51:58,978 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:58,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:58,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 00:51:58,979 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:51:58,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:58,980 INFO L85 PathProgramCache]: Analyzing trace with hash 414072567, now seen corresponding path program 1 times [2023-11-29 00:51:58,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:58,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761697296] [2023-11-29 00:51:58,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:58,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:59,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:59,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761697296] [2023-11-29 00:51:59,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761697296] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:59,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:59,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:51:59,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043805747] [2023-11-29 00:51:59,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:59,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:51:59,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:59,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:51:59,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:51:59,030 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:59,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:59,058 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-11-29 00:51:59,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:51:59,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 00:51:59,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:59,059 INFO L225 Difference]: With dead ends: 26 [2023-11-29 00:51:59,059 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 00:51:59,059 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 [2023-11-29 00:51:59,060 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:59,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 17 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:51:59,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 00:51:59,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-29 00:51:59,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.6) internal successors, (32), 25 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) [2023-11-29 00:51:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-11-29 00:51:59,064 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 10 [2023-11-29 00:51:59,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:59,065 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-11-29 00:51:59,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:59,065 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-11-29 00:51:59,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 00:51:59,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:59,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:59,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 00:51:59,067 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:51:59,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:59,067 INFO L85 PathProgramCache]: Analyzing trace with hash 414072568, now seen corresponding path program 1 times [2023-11-29 00:51:59,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:59,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185617990] [2023-11-29 00:51:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:59,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:59,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:59,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185617990] [2023-11-29 00:51:59,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185617990] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:59,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:59,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:51:59,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291213412] [2023-11-29 00:51:59,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:59,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:51:59,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:59,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:51:59,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:51:59,231 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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) [2023-11-29 00:51:59,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:59,341 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2023-11-29 00:51:59,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:51:59,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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 [2023-11-29 00:51:59,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:59,343 INFO L225 Difference]: With dead ends: 59 [2023-11-29 00:51:59,343 INFO L226 Difference]: Without dead ends: 59 [2023-11-29 00:51:59,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:51:59,344 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:59,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 44 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:51:59,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-29 00:51:59,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 38. [2023-11-29 00:51:59,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.5) internal successors, (48), 37 states have internal predecessors, (48), 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) [2023-11-29 00:51:59,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-11-29 00:51:59,350 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 10 [2023-11-29 00:51:59,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:59,351 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-11-29 00:51:59,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 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) [2023-11-29 00:51:59,351 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-11-29 00:51:59,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 00:51:59,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:59,352 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:59,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 00:51:59,352 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:51:59,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:59,353 INFO L85 PathProgramCache]: Analyzing trace with hash 414081641, now seen corresponding path program 1 times [2023-11-29 00:51:59,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:59,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046238722] [2023-11-29 00:51:59,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:59,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:59,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:59,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:59,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046238722] [2023-11-29 00:51:59,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046238722] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:59,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:59,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:51:59,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265620548] [2023-11-29 00:51:59,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:59,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:51:59,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:59,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:51:59,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:51:59,383 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:59,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:59,402 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2023-11-29 00:51:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:51:59,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 00:51:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:59,406 INFO L225 Difference]: With dead ends: 39 [2023-11-29 00:51:59,406 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 00:51:59,406 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 [2023-11-29 00:51:59,407 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 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 [2023-11-29 00:51:59,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:51:59,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 00:51:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-29 00:51:59,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 38 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) [2023-11-29 00:51:59,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2023-11-29 00:51:59,412 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 10 [2023-11-29 00:51:59,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:59,412 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2023-11-29 00:51:59,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:59,413 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2023-11-29 00:51:59,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 00:51:59,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:59,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:59,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 00:51:59,414 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)] === [2023-11-29 00:51:59,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:59,414 INFO L85 PathProgramCache]: Analyzing trace with hash -395274058, now seen corresponding path program 1 times [2023-11-29 00:51:59,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:59,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456988345] [2023-11-29 00:51:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:59,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:59,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:59,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456988345] [2023-11-29 00:51:59,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456988345] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:59,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:59,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:51:59,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936238202] [2023-11-29 00:51:59,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:59,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:51:59,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:59,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:51:59,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:51:59,647 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2023-11-29 00:51:59,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:59,738 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-11-29 00:51:59,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:51:59,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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 [2023-11-29 00:51:59,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:59,739 INFO L225 Difference]: With dead ends: 41 [2023-11-29 00:51:59,739 INFO L226 Difference]: Without dead ends: 41 [2023-11-29 00:51:59,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:51:59,740 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:59,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 25 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:51:59,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-29 00:51:59,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2023-11-29 00:51:59,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.5) internal successors, (36), 29 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) [2023-11-29 00:51:59,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-11-29 00:51:59,743 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 10 [2023-11-29 00:51:59,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:59,744 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-11-29 00:51:59,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 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) [2023-11-29 00:51:59,744 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-11-29 00:51:59,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 00:51:59,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:59,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:59,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 00:51:59,745 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:51:59,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:59,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1508187450, now seen corresponding path program 1 times [2023-11-29 00:51:59,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:59,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134712044] [2023-11-29 00:51:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:59,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:59,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:59,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:59,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134712044] [2023-11-29 00:51:59,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134712044] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:51:59,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:51:59,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:51:59,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923145243] [2023-11-29 00:51:59,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:51:59,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:51:59,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:59,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:51:59,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:51:59,928 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2023-11-29 00:52:00,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:00,039 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-11-29 00:52:00,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:52:00,040 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 12 [2023-11-29 00:52:00,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:52:00,041 INFO L225 Difference]: With dead ends: 41 [2023-11-29 00:52:00,041 INFO L226 Difference]: Without dead ends: 41 [2023-11-29 00:52:00,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 00:52:00,042 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:52:00,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 60 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:52:00,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-29 00:52:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2023-11-29 00:52:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.4333333333333333) internal successors, (43), 35 states have internal predecessors, (43), 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) [2023-11-29 00:52:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2023-11-29 00:52:00,046 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 12 [2023-11-29 00:52:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:00,046 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2023-11-29 00:52:00,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2023-11-29 00:52:00,046 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2023-11-29 00:52:00,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 00:52:00,047 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:52:00,047 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:00,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 00:52:00,047 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:52:00,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1499519382, now seen corresponding path program 1 times [2023-11-29 00:52:00,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:00,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74415935] [2023-11-29 00:52:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:00,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:00,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:00,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:00,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74415935] [2023-11-29 00:52:00,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74415935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:52:00,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:52:00,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:52:00,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67479332] [2023-11-29 00:52:00,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:52:00,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:52:00,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:00,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:52:00,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:52:00,204 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-29 00:52:00,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:00,226 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2023-11-29 00:52:00,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:52:00,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2023-11-29 00:52:00,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:52:00,227 INFO L225 Difference]: With dead ends: 35 [2023-11-29 00:52:00,227 INFO L226 Difference]: Without dead ends: 25 [2023-11-29 00:52:00,228 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 [2023-11-29 00:52:00,228 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:52:00,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 26 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:52:00,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-29 00:52:00,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-29 00:52:00,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.35) internal successors, (27), 24 states have internal predecessors, (27), 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) [2023-11-29 00:52:00,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-11-29 00:52:00,231 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 12 [2023-11-29 00:52:00,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:00,231 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-11-29 00:52:00,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2023-11-29 00:52:00,232 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-11-29 00:52:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 00:52:00,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:52:00,232 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:00,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 00:52:00,233 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:52:00,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:00,233 INFO L85 PathProgramCache]: Analyzing trace with hash -807122872, now seen corresponding path program 1 times [2023-11-29 00:52:00,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:00,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091580613] [2023-11-29 00:52:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:00,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:00,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:00,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:00,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:00,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091580613] [2023-11-29 00:52:00,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091580613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:00,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009629742] [2023-11-29 00:52:00,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:00,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:00,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:00,532 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:00,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:52:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:00,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 00:52:00,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:00,687 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 [2023-11-29 00:52:00,783 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 16 treesize of output 8 [2023-11-29 00:52:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:00,823 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:52:00,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009629742] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:52:00,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:52:00,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2023-11-29 00:52:00,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207332145] [2023-11-29 00:52:00,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:52:00,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 00:52:00,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:00,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 00:52:00,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:52:00,825 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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) [2023-11-29 00:52:01,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:01,006 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2023-11-29 00:52:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:52:01,007 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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 12 [2023-11-29 00:52:01,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:52:01,007 INFO L225 Difference]: With dead ends: 33 [2023-11-29 00:52:01,007 INFO L226 Difference]: Without dead ends: 25 [2023-11-29 00:52:01,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:52:01,009 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:52:01,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 54 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:52:01,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-29 00:52:01,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-29 00:52:01,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.3) internal successors, (26), 24 states have internal predecessors, (26), 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) [2023-11-29 00:52:01,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-11-29 00:52:01,012 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 12 [2023-11-29 00:52:01,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:01,013 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-11-29 00:52:01,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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) [2023-11-29 00:52:01,013 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-11-29 00:52:01,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 00:52:01,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:52:01,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:01,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:52:01,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:01,216 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:52:01,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:01,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1200149882, now seen corresponding path program 1 times [2023-11-29 00:52:01,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:01,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899719671] [2023-11-29 00:52:01,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:01,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:01,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:01,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:01,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899719671] [2023-11-29 00:52:01,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899719671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:01,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029451337] [2023-11-29 00:52:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:01,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:01,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:01,501 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:01,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:52:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:01,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 00:52:01,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:01,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-29 00:52:01,736 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:52:01,737 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 32 treesize of output 29 [2023-11-29 00:52:01,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:01,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:52:02,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-11-29 00:52:02,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-29 00:52:02,109 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 [2023-11-29 00:52:02,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:02,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029451337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:52:02,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:52:02,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2023-11-29 00:52:02,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675147817] [2023-11-29 00:52:02,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:52:02,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:52:02,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:02,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:52:02,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:52:02,121 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 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) [2023-11-29 00:52:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:02,668 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2023-11-29 00:52:02,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:52:02,669 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 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) Word has length 12 [2023-11-29 00:52:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:52:02,669 INFO L225 Difference]: With dead ends: 34 [2023-11-29 00:52:02,669 INFO L226 Difference]: Without dead ends: 32 [2023-11-29 00:52:02,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:52:02,671 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 179 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:52:02,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 30 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:52:02,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-29 00:52:02,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2023-11-29 00:52:02,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.15) internal successors, (23), 22 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) [2023-11-29 00:52:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2023-11-29 00:52:02,673 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 12 [2023-11-29 00:52:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:02,674 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2023-11-29 00:52:02,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 18 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) [2023-11-29 00:52:02,674 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2023-11-29 00:52:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 00:52:02,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:52:02,675 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:02,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:52:02,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:02,880 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)] === [2023-11-29 00:52:02,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:02,881 INFO L85 PathProgramCache]: Analyzing trace with hash 1938888566, now seen corresponding path program 1 times [2023-11-29 00:52:02,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:02,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842294382] [2023-11-29 00:52:02,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:02,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:03,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:03,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842294382] [2023-11-29 00:52:03,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842294382] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:03,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945290268] [2023-11-29 00:52:03,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:03,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:03,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:03,162 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:03,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:52:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:03,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 00:52:03,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:03,267 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 [2023-11-29 00:52:03,449 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 [2023-11-29 00:52:03,514 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:52:03,515 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 [2023-11-29 00:52:03,589 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:03,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:52:03,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-29 00:52:03,769 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 20 treesize of output 12 [2023-11-29 00:52:03,821 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 [2023-11-29 00:52:03,828 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 [2023-11-29 00:52:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:03,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945290268] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:52:03,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:52:03,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-29 00:52:03,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118864549] [2023-11-29 00:52:03,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:52:03,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 00:52:03,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:03,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 00:52:03,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-11-29 00:52:03,863 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 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) [2023-11-29 00:52:04,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:04,210 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2023-11-29 00:52:04,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:52:04,211 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 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 [2023-11-29 00:52:04,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:52:04,212 INFO L225 Difference]: With dead ends: 30 [2023-11-29 00:52:04,212 INFO L226 Difference]: Without dead ends: 27 [2023-11-29 00:52:04,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2023-11-29 00:52:04,213 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:52:04,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 42 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:52:04,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-29 00:52:04,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-29 00:52:04,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 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) [2023-11-29 00:52:04,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2023-11-29 00:52:04,215 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 15 [2023-11-29 00:52:04,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:04,216 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2023-11-29 00:52:04,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 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) [2023-11-29 00:52:04,216 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2023-11-29 00:52:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 00:52:04,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:52:04,216 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:04,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:52:04,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:52:04,417 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)] === [2023-11-29 00:52:04,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:04,417 INFO L85 PathProgramCache]: Analyzing trace with hash -743861308, now seen corresponding path program 2 times [2023-11-29 00:52:04,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:04,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983889117] [2023-11-29 00:52:04,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:04,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:04,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:04,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:04,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983889117] [2023-11-29 00:52:04,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983889117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:04,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480560226] [2023-11-29 00:52:04,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:52:04,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:04,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:04,894 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:04,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:52:04,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:52:04,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:52:04,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 00:52:04,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:05,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-29 00:52:05,398 INFO L349 Elim1Store]: treesize reduction 4, result has 82.6 percent of original size [2023-11-29 00:52:05,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2023-11-29 00:52:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:05,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:52:05,866 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 29 treesize of output 25 [2023-11-29 00:52:05,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 39 [2023-11-29 00:52:05,886 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 [2023-11-29 00:52:05,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:05,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480560226] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:52:05,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:52:05,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2023-11-29 00:52:05,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200271326] [2023-11-29 00:52:05,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:52:05,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 00:52:05,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:05,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 00:52:05,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2023-11-29 00:52:05,914 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 25 states, 24 states have (on average 1.75) internal successors, (42), 25 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) [2023-11-29 00:52:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:07,704 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2023-11-29 00:52:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 00:52:07,705 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 25 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) Word has length 17 [2023-11-29 00:52:07,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:52:07,705 INFO L225 Difference]: With dead ends: 26 [2023-11-29 00:52:07,705 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 00:52:07,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=366, Invalid=1116, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 00:52:07,707 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 120 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:52:07,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 27 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:52:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 00:52:07,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-11-29 00:52:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 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) [2023-11-29 00:52:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2023-11-29 00:52:07,709 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 17 [2023-11-29 00:52:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:07,710 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2023-11-29 00:52:07,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.75) internal successors, (42), 25 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) [2023-11-29 00:52:07,710 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2023-11-29 00:52:07,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-29 00:52:07,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:52:07,711 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:07,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:52:07,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:52:07,917 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-11-29 00:52:07,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:07,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1660304760, now seen corresponding path program 2 times [2023-11-29 00:52:07,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:07,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859212918] [2023-11-29 00:52:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:07,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:08,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:08,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859212918] [2023-11-29 00:52:08,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859212918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:08,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107928884] [2023-11-29 00:52:08,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:52:08,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:08,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:08,290 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:08,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:52:08,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:52:08,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:52:08,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 00:52:08,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:08,387 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 [2023-11-29 00:52:08,503 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 [2023-11-29 00:52:08,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:52:08,544 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 [2023-11-29 00:52:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:08,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:52:08,773 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 20 treesize of output 12 [2023-11-29 00:52:08,868 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 43 treesize of output 39 [2023-11-29 00:52:08,886 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 [2023-11-29 00:52:08,888 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 [2023-11-29 00:52:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:08,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107928884] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:52:08,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:52:08,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-11-29 00:52:08,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281545157] [2023-11-29 00:52:08,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:52:08,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 00:52:08,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:08,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 00:52:08,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:52:08,895 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 23 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) [2023-11-29 00:52:09,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:09,207 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2023-11-29 00:52:09,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:52:09,207 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 23 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 20 [2023-11-29 00:52:09,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:52:09,208 INFO L225 Difference]: With dead ends: 24 [2023-11-29 00:52:09,208 INFO L226 Difference]: Without dead ends: 0 [2023-11-29 00:52:09,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:52:09,209 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:52:09,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 36 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:52:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-29 00:52:09,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-29 00:52:09,210 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) [2023-11-29 00:52:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-29 00:52:09,210 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2023-11-29 00:52:09,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:09,210 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-29 00:52:09,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 23 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) [2023-11-29 00:52:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-29 00:52:09,210 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-29 00:52:09,212 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 15 remaining) [2023-11-29 00:52:09,213 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 15 remaining) [2023-11-29 00:52:09,213 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2023-11-29 00:52:09,213 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2023-11-29 00:52:09,213 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2023-11-29 00:52:09,213 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2023-11-29 00:52:09,213 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 15 remaining) [2023-11-29 00:52:09,213 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2023-11-29 00:52:09,214 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2023-11-29 00:52:09,214 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2023-11-29 00:52:09,214 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2023-11-29 00:52:09,214 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 15 remaining) [2023-11-29 00:52:09,214 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 15 remaining) [2023-11-29 00:52:09,214 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 15 remaining) [2023-11-29 00:52:09,214 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2023-11-29 00:52:09,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:52:09,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:09,417 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:09,420 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 00:52:09,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 12:52:09 BoogieIcfgContainer [2023-11-29 00:52:09,423 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 00:52:09,423 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 00:52:09,423 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 00:52:09,423 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 00:52:09,424 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:51:57" (3/4) ... [2023-11-29 00:52:09,425 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-29 00:52:09,432 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-11-29 00:52:09,432 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-29 00:52:09,432 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-29 00:52:09,433 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-29 00:52:09,514 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 00:52:09,515 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-29 00:52:09,515 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 00:52:09,515 INFO L158 Benchmark]: Toolchain (without parser) took 13279.77ms. Allocated memory was 155.2MB in the beginning and 270.5MB in the end (delta: 115.3MB). Free memory was 125.7MB in the beginning and 132.7MB in the end (delta: -7.0MB). Peak memory consumption was 110.1MB. Max. memory is 16.1GB. [2023-11-29 00:52:09,516 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 155.2MB. Free memory is still 116.9MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 00:52:09,516 INFO L158 Benchmark]: CACSL2BoogieTranslator took 361.79ms. Allocated memory is still 155.2MB. Free memory was 125.7MB in the beginning and 107.6MB in the end (delta: 18.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-29 00:52:09,516 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.16ms. Allocated memory is still 155.2MB. Free memory was 107.6MB in the beginning and 105.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 00:52:09,517 INFO L158 Benchmark]: Boogie Preprocessor took 37.76ms. Allocated memory is still 155.2MB. Free memory was 105.8MB in the beginning and 103.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 00:52:09,517 INFO L158 Benchmark]: RCFGBuilder took 394.80ms. Allocated memory is still 155.2MB. Free memory was 103.3MB in the beginning and 87.3MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-29 00:52:09,517 INFO L158 Benchmark]: TraceAbstraction took 12347.77ms. Allocated memory was 155.2MB in the beginning and 270.5MB in the end (delta: 115.3MB). Free memory was 86.6MB in the beginning and 138.5MB in the end (delta: -51.9MB). Peak memory consumption was 66.0MB. Max. memory is 16.1GB. [2023-11-29 00:52:09,518 INFO L158 Benchmark]: Witness Printer took 91.79ms. Allocated memory is still 270.5MB. Free memory was 138.0MB in the beginning and 132.7MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-29 00:52:09,520 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 155.2MB. Free memory is still 116.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 361.79ms. Allocated memory is still 155.2MB. Free memory was 125.7MB in the beginning and 107.6MB in the end (delta: 18.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.16ms. Allocated memory is still 155.2MB. Free memory was 107.6MB in the beginning and 105.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.76ms. Allocated memory is still 155.2MB. Free memory was 105.8MB in the beginning and 103.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 394.80ms. Allocated memory is still 155.2MB. Free memory was 103.3MB in the beginning and 87.3MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 12347.77ms. Allocated memory was 155.2MB in the beginning and 270.5MB in the end (delta: 115.3MB). Free memory was 86.6MB in the beginning and 138.5MB in the end (delta: -51.9MB). Peak memory consumption was 66.0MB. Max. memory is 16.1GB. * Witness Printer took 91.79ms. Allocated memory is still 270.5MB. Free memory was 138.0MB in the beginning and 132.7MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. 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: 375]: 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, 30 locations, 15 error locations. Started 1 CEGAR loops. OverallTime: 12.3s, OverallIterations: 19, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 819 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 819 mSDsluCounter, 625 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 400 mSDsCounter, 42 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1105 IncrementalHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 42 mSolverCounterUnsat, 225 mSDtfsCounter, 1105 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 279 GetRequests, 88 SyntacticMatches, 8 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=11, InterpolantAutomatonStates: 131, 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, 19 MinimizatonAttempts, 100 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 263 NumberOfCodeBlocks, 263 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 299 ConstructedInterpolants, 16 QuantifiedInterpolants, 3065 SizeOfPredicates, 80 NumberOfNonLiveVariables, 635 ConjunctsInSsa, 145 ConjunctsInUnsatCore, 28 InterpolantComputations, 15 PerfectInterpolantSequences, 8/79 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! [2023-11-29 00:52:09,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_89508988-33be-4479-bd23-9876fbcf9020/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