./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-dietlibc/strcpy_small.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_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-dietlibc/strcpy_small.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI --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 ac582ab464abffec628fd39914d1e8ed3c994a881b722675333d088c8e0918eb --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:43:47,978 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:43:48,133 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2023-11-24 21:43:48,142 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:43:48,143 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:43:48,215 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:43:48,216 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:43:48,216 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:43:48,217 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:43:48,218 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:43:48,219 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:43:48,219 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:43:48,220 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:43:48,221 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:43:48,222 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:43:48,223 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:43:48,223 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:43:48,224 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:43:48,224 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 21:43:48,225 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 21:43:48,225 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 21:43:48,226 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:43:48,227 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-24 21:43:48,227 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 21:43:48,228 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:43:48,228 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:43:48,229 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:43:48,229 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:43:48,230 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:43:48,230 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:43:48,231 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:43:48,231 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:43:48,232 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:43:48,232 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:43:48,232 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:43:48,233 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:43:48,248 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:43:48,248 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:43:48,249 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_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac582ab464abffec628fd39914d1e8ed3c994a881b722675333d088c8e0918eb [2023-11-24 21:43:48,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:43:48,706 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:43:48,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:43:48,713 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:43:48,714 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:43:48,716 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/termination-dietlibc/strcpy_small.i [2023-11-24 21:43:52,435 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:43:52,850 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:43:52,851 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/sv-benchmarks/c/termination-dietlibc/strcpy_small.i [2023-11-24 21:43:52,872 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/data/1fe61b146/85fbde31917d441b89e3888263e0dd86/FLAG63a76fad3 [2023-11-24 21:43:52,891 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/data/1fe61b146/85fbde31917d441b89e3888263e0dd86 [2023-11-24 21:43:52,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:43:52,897 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:43:52,899 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:52,899 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:43:52,909 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:43:52,910 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:52" (1/1) ... [2023-11-24 21:43:52,912 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14c5c976 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:52, skipping insertion in model container [2023-11-24 21:43:52,912 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:43:52" (1/1) ... [2023-11-24 21:43:52,974 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:43:53,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:53,421 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:43:53,507 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:43:53,556 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:43:53,556 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:53 WrapperNode [2023-11-24 21:43:53,557 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:43:53,559 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:43:53,559 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:43:53,559 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:43:53,569 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:53" (1/1) ... [2023-11-24 21:43:53,602 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:53" (1/1) ... [2023-11-24 21:43:53,641 INFO L138 Inliner]: procedures = 113, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2023-11-24 21:43:53,642 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:43:53,642 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:43:53,643 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:43:53,643 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:43:53,655 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:53" (1/1) ... [2023-11-24 21:43:53,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:53" (1/1) ... [2023-11-24 21:43:53,660 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:53" (1/1) ... [2023-11-24 21:43:53,684 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [1, 2]. 67 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]. [2023-11-24 21:43:53,698 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:53" (1/1) ... [2023-11-24 21:43:53,699 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:53" (1/1) ... [2023-11-24 21:43:53,706 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:53" (1/1) ... [2023-11-24 21:43:53,710 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:53" (1/1) ... [2023-11-24 21:43:53,712 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:53" (1/1) ... [2023-11-24 21:43:53,714 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:53" (1/1) ... [2023-11-24 21:43:53,717 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:43:53,718 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:43:53,719 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:43:53,719 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:43:53,720 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:53" (1/1) ... [2023-11-24 21:43:53,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:43:53,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:53,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:43:53,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:43:53,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-24 21:43:53,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-24 21:43:53,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-24 21:43:53,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-24 21:43:53,834 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-24 21:43:53,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 21:43:53,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:43:53,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:43:53,943 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:43:53,946 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:43:54,161 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:43:54,201 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:43:54,201 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-24 21:43:54,202 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:54 BoogieIcfgContainer [2023-11-24 21:43:54,202 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:43:54,206 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:43:54,206 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:43:54,211 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:43:54,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:43:52" (1/3) ... [2023-11-24 21:43:54,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e81532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:54, skipping insertion in model container [2023-11-24 21:43:54,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:43:53" (2/3) ... [2023-11-24 21:43:54,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78e81532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:43:54, skipping insertion in model container [2023-11-24 21:43:54,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:54" (3/3) ... [2023-11-24 21:43:54,216 INFO L112 eAbstractionObserver]: Analyzing ICFG strcpy_small.i [2023-11-24 21:43:54,244 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:43:54,244 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-11-24 21:43:54,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:43:54,315 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;@54d4f6c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:43:54,316 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-24 21:43:54,321 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 2.1) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:54,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 21:43:54,328 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:54,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 21:43:54,329 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 21:43:54,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:54,335 INFO L85 PathProgramCache]: Analyzing trace with hash 72270, now seen corresponding path program 1 times [2023-11-24 21:43:54,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:54,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195597512] [2023-11-24 21:43:54,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:54,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:54,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:54,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:54,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195597512] [2023-11-24 21:43:54,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195597512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:54,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:54,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-24 21:43:54,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415482206] [2023-11-24 21:43:54,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:54,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:54,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:54,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:54,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:54,680 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 2.1) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:54,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:54,775 INFO L93 Difference]: Finished difference Result 19 states and 21 transitions. [2023-11-24 21:43:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:54,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-24 21:43:54,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:54,788 INFO L225 Difference]: With dead ends: 19 [2023-11-24 21:43:54,788 INFO L226 Difference]: Without dead ends: 17 [2023-11-24 21:43:54,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:54,795 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:54,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:43:54,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-24 21:43:54,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-24 21:43:54,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.8) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-24 21:43:54,835 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 3 [2023-11-24 21:43:54,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:54,836 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-24 21:43:54,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-24 21:43:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 21:43:54,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:54,837 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 21:43:54,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:43:54,838 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 21:43:54,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:54,839 INFO L85 PathProgramCache]: Analyzing trace with hash 72301, now seen corresponding path program 1 times [2023-11-24 21:43:54,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:54,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116660110] [2023-11-24 21:43:54,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:54,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:55,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:55,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116660110] [2023-11-24 21:43:55,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116660110] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:55,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:55,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:55,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849385449] [2023-11-24 21:43:55,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:55,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:43:55,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:55,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:43:55,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:43:55,037 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:55,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:55,070 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2023-11-24 21:43:55,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:43:55,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-24 21:43:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:55,071 INFO L225 Difference]: With dead ends: 16 [2023-11-24 21:43:55,072 INFO L226 Difference]: Without dead ends: 16 [2023-11-24 21:43:55,072 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 [2023-11-24 21:43:55,074 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:55,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:43:55,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-24 21:43:55,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-24 21:43:55,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.7) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:55,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-11-24 21:43:55,080 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 3 [2023-11-24 21:43:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:55,081 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-11-24 21:43:55,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:55,081 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-11-24 21:43:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 21:43:55,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:55,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-24 21:43:55,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:43:55,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 21:43:55,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:55,084 INFO L85 PathProgramCache]: Analyzing trace with hash 72302, now seen corresponding path program 1 times [2023-11-24 21:43:55,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:55,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857515847] [2023-11-24 21:43:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:55,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:55,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:55,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857515847] [2023-11-24 21:43:55,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857515847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:55,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:55,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:55,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172498649] [2023-11-24 21:43:55,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:55,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:55,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:55,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:55,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:55,386 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:55,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:55,443 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2023-11-24 21:43:55,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:55,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-24 21:43:55,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:55,447 INFO L225 Difference]: With dead ends: 17 [2023-11-24 21:43:55,447 INFO L226 Difference]: Without dead ends: 17 [2023-11-24 21:43:55,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:55,459 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:55,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 16 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:43:55,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-24 21:43:55,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2023-11-24 21:43:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:55,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-24 21:43:55,466 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 3 [2023-11-24 21:43:55,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:55,466 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-24 21:43:55,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:55,467 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-24 21:43:55,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 21:43:55,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:55,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-24 21:43:55,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:43:55,468 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 21:43:55,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:55,469 INFO L85 PathProgramCache]: Analyzing trace with hash 69514409, now seen corresponding path program 1 times [2023-11-24 21:43:55,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:55,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253749407] [2023-11-24 21:43:55,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:55,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:55,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:55,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253749407] [2023-11-24 21:43:55,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253749407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:55,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:55,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-24 21:43:55,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918377086] [2023-11-24 21:43:55,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:55,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:55,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:55,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:55,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:55,734 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) 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) [2023-11-24 21:43:55,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:55,793 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2023-11-24 21:43:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:55,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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 [2023-11-24 21:43:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:55,796 INFO L225 Difference]: With dead ends: 16 [2023-11-24 21:43:55,796 INFO L226 Difference]: Without dead ends: 15 [2023-11-24 21:43:55,799 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 [2023-11-24 21:43:55,802 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:55,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:43:55,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-24 21:43:55,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-24 21:43:55,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.5) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:55,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-11-24 21:43:55,806 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2023-11-24 21:43:55,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:55,807 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-11-24 21:43:55,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) 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) [2023-11-24 21:43:55,807 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-11-24 21:43:55,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:43:55,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:55,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:43:55,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:43:55,809 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 21:43:55,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:55,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2140019261, now seen corresponding path program 1 times [2023-11-24 21:43:55,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:55,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866795601] [2023-11-24 21:43:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:55,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:56,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:56,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866795601] [2023-11-24 21:43:56,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866795601] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:56,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:56,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-24 21:43:56,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470077235] [2023-11-24 21:43:56,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:56,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:43:56,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:56,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:43:56,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:43:56,140 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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) [2023-11-24 21:43:56,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:56,205 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2023-11-24 21:43:56,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:43:56,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 [2023-11-24 21:43:56,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:56,207 INFO L225 Difference]: With dead ends: 14 [2023-11-24 21:43:56,207 INFO L226 Difference]: Without dead ends: 14 [2023-11-24 21:43:56,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:43:56,209 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:56,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 5 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:43:56,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-24 21:43:56,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-24 21:43:56,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.4) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:56,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2023-11-24 21:43:56,214 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 6 [2023-11-24 21:43:56,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:56,215 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2023-11-24 21:43:56,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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) [2023-11-24 21:43:56,215 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2023-11-24 21:43:56,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-24 21:43:56,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:56,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-24 21:43:56,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:43:56,217 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 21:43:56,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:56,218 INFO L85 PathProgramCache]: Analyzing trace with hash -2140019260, now seen corresponding path program 1 times [2023-11-24 21:43:56,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:56,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84239313] [2023-11-24 21:43:56,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:56,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:56,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:56,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84239313] [2023-11-24 21:43:56,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84239313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:56,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:56,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:43:56,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778665314] [2023-11-24 21:43:56,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:56,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:56,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:56,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:56,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:56,462 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 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) [2023-11-24 21:43:56,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:56,596 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2023-11-24 21:43:56,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:43:56,596 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 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 [2023-11-24 21:43:56,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:56,597 INFO L225 Difference]: With dead ends: 20 [2023-11-24 21:43:56,598 INFO L226 Difference]: Without dead ends: 20 [2023-11-24 21:43:56,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:43:56,600 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 35 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:56,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 8 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:43:56,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-24 21:43:56,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 16. [2023-11-24 21:43:56,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:56,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2023-11-24 21:43:56,606 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 6 [2023-11-24 21:43:56,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:56,606 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2023-11-24 21:43:56,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 6 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) [2023-11-24 21:43:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2023-11-24 21:43:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 21:43:56,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:56,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:56,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:43:56,609 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 21:43:56,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:56,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1916087656, now seen corresponding path program 1 times [2023-11-24 21:43:56,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:56,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369682300] [2023-11-24 21:43:56,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:56,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:56,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:56,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:56,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369682300] [2023-11-24 21:43:56,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369682300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:56,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:56,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:43:56,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046957452] [2023-11-24 21:43:56,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:56,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:43:56,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:56,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:43:56,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-24 21:43:56,693 INFO L87 Difference]: Start difference. First operand 16 states and 16 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) [2023-11-24 21:43:56,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:56,732 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2023-11-24 21:43:56,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:43:56,741 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 [2023-11-24 21:43:56,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:56,741 INFO L225 Difference]: With dead ends: 15 [2023-11-24 21:43:56,742 INFO L226 Difference]: Without dead ends: 15 [2023-11-24 21:43:56,742 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 [2023-11-24 21:43:56,743 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:56,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 6 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:43:56,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-24 21:43:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-24 21:43:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-11-24 21:43:56,748 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2023-11-24 21:43:56,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:56,749 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-11-24 21:43:56,749 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) [2023-11-24 21:43:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-11-24 21:43:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-24 21:43:56,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:56,750 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:56,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-24 21:43:56,751 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 21:43:56,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:56,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1916087655, now seen corresponding path program 1 times [2023-11-24 21:43:56,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:56,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903467865] [2023-11-24 21:43:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:56,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:56,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:56,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903467865] [2023-11-24 21:43:56,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903467865] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:43:56,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:43:56,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:43:56,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273501666] [2023-11-24 21:43:56,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:43:56,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:43:56,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:56,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:43:56,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:43:56,944 INFO L87 Difference]: Start difference. First operand 15 states and 15 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) [2023-11-24 21:43:57,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:43:57,040 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2023-11-24 21:43:57,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:43:57,041 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 [2023-11-24 21:43:57,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:43:57,042 INFO L225 Difference]: With dead ends: 17 [2023-11-24 21:43:57,042 INFO L226 Difference]: Without dead ends: 17 [2023-11-24 21:43:57,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:43:57,044 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:43:57,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 10 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:43:57,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-24 21:43:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2023-11-24 21:43:57,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:43:57,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2023-11-24 21:43:57,049 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 7 [2023-11-24 21:43:57,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:43:57,049 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2023-11-24 21:43:57,050 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) [2023-11-24 21:43:57,050 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2023-11-24 21:43:57,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:43:57,051 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:43:57,051 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:43:57,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-24 21:43:57,052 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 21:43:57,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:43:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash -2051994420, now seen corresponding path program 1 times [2023-11-24 21:43:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:43:57,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682602892] [2023-11-24 21:43:57,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:57,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:43:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:57,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:57,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:43:57,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682602892] [2023-11-24 21:43:57,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682602892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:43:57,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013104689] [2023-11-24 21:43:57,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:43:57,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:43:57,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:43:57,709 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:43:57,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:43:57,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:43:57,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-24 21:43:57,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:43:57,948 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 [2023-11-24 21:43:58,079 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-24 21:43:58,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2023-11-24 21:43:58,176 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:43:58,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 21:43:58,394 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:43:58,394 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 20 treesize of output 17 [2023-11-24 21:43:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:58,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:43:59,027 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-24 21:43:59,032 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 13 treesize of output 9 [2023-11-24 21:43:59,044 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:43:59,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-24 21:43:59,063 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 15 treesize of output 13 [2023-11-24 21:43:59,073 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 20 treesize of output 16 [2023-11-24 21:43:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:43:59,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013104689] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:43:59,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:43:59,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-24 21:43:59,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324480947] [2023-11-24 21:43:59,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:43:59,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-24 21:43:59,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:43:59,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-24 21:43:59,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-11-24 21:43:59,101 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 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) [2023-11-24 21:44:00,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:00,142 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2023-11-24 21:44:00,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-24 21:44:00,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-24 21:44:00,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:00,144 INFO L225 Difference]: With dead ends: 22 [2023-11-24 21:44:00,144 INFO L226 Difference]: Without dead ends: 22 [2023-11-24 21:44:00,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2023-11-24 21:44:00,146 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 106 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:00,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 21 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:44:00,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-24 21:44:00,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2023-11-24 21:44:00,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:00,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-11-24 21:44:00,150 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 10 [2023-11-24 21:44:00,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:00,150 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-11-24 21:44:00,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 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) [2023-11-24 21:44:00,151 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-11-24 21:44:00,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 21:44:00,156 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:00,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:00,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:00,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:00,364 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 21:44:00,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:00,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2051995551, now seen corresponding path program 1 times [2023-11-24 21:44:00,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:00,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450466523] [2023-11-24 21:44:00,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:00,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:00,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:00,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:00,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:00,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450466523] [2023-11-24 21:44:00,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450466523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:44:00,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:44:00,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:44:00,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919068052] [2023-11-24 21:44:00,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:44:00,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:44:00,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:00,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:44:00,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:44:00,599 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:00,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:00,627 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2023-11-24 21:44:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:44:00,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-24 21:44:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:00,630 INFO L225 Difference]: With dead ends: 18 [2023-11-24 21:44:00,630 INFO L226 Difference]: Without dead ends: 16 [2023-11-24 21:44:00,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:44:00,631 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:00,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 15 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:44:00,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-24 21:44:00,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-24 21:44:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:00,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2023-11-24 21:44:00,639 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 10 [2023-11-24 21:44:00,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:00,640 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2023-11-24 21:44:00,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:00,641 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2023-11-24 21:44:00,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 21:44:00,641 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:00,641 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:00,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-24 21:44:00,642 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 21:44:00,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:00,643 INFO L85 PathProgramCache]: Analyzing trace with hash 812682385, now seen corresponding path program 1 times [2023-11-24 21:44:00,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:00,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148554342] [2023-11-24 21:44:00,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:00,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:00,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:01,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:01,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148554342] [2023-11-24 21:44:01,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148554342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:01,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338983656] [2023-11-24 21:44:01,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:01,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:01,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:01,515 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:01,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:44:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:01,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-24 21:44:01,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:01,664 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 [2023-11-24 21:44:01,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:44:02,119 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-24 21:44:02,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-24 21:44:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:02,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:03,165 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 [2023-11-24 21:44:03,172 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 [2023-11-24 21:44:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:03,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338983656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:03,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:03,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-24 21:44:03,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931210090] [2023-11-24 21:44:03,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:03,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-24 21:44:03,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:03,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-24 21:44:03,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2023-11-24 21:44:03,245 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 26 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) [2023-11-24 21:44:04,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:04,534 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2023-11-24 21:44:04,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-24 21:44:04,535 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.24) internal successors, (31), 26 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) Word has length 11 [2023-11-24 21:44:04,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:04,536 INFO L225 Difference]: With dead ends: 17 [2023-11-24 21:44:04,536 INFO L226 Difference]: Without dead ends: 17 [2023-11-24 21:44:04,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=225, Invalid=1035, Unknown=0, NotChecked=0, Total=1260 [2023-11-24 21:44:04,538 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 90 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:04,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 4 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:44:04,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-24 21:44:04,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2023-11-24 21:44:04,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-11-24 21:44:04,541 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2023-11-24 21:44:04,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:04,541 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-11-24 21:44:04,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.24) internal successors, (31), 26 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) [2023-11-24 21:44:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-11-24 21:44:04,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 21:44:04,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:44:04,548 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-24 21:44:04,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-24 21:44:04,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:04,756 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-24 21:44:04,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:44:04,756 INFO L85 PathProgramCache]: Analyzing trace with hash -109744172, now seen corresponding path program 2 times [2023-11-24 21:44:04,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:44:04,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739085732] [2023-11-24 21:44:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:44:04,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:44:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:44:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:05,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:44:05,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739085732] [2023-11-24 21:44:05,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739085732] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:44:05,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948957463] [2023-11-24 21:44:05,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:44:05,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:05,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:44:05,765 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:44:05,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:44:05,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:44:05,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:44:05,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 47 conjunts are in the unsatisfiable core [2023-11-24 21:44:05,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:44:05,887 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-24 21:44:05,919 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 [2023-11-24 21:44:05,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-24 21:44:05,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-24 21:44:06,015 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-24 21:44:06,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-24 21:44:06,559 INFO L349 Elim1Store]: treesize reduction 4, result has 81.8 percent of original size [2023-11-24 21:44:06,560 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 30 treesize of output 28 [2023-11-24 21:44:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:06,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:44:07,487 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 [2023-11-24 21:44:07,506 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-24 21:44:07,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2023-11-24 21:44:07,519 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 [2023-11-24 21:44:07,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:44:07,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948957463] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:44:07,608 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:44:07,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2023-11-24 21:44:07,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168799612] [2023-11-24 21:44:07,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:44:07,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-24 21:44:07,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:44:07,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-24 21:44:07,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2023-11-24 21:44:07,616 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:14,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:44:14,032 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2023-11-24 21:44:14,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:44:14,033 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-24 21:44:14,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:44:14,033 INFO L225 Difference]: With dead ends: 16 [2023-11-24 21:44:14,033 INFO L226 Difference]: Without dead ends: 0 [2023-11-24 21:44:14,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=275, Invalid=1285, Unknown=0, NotChecked=0, Total=1560 [2023-11-24 21:44:14,036 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 83 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-24 21:44:14,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-24 21:44:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-24 21:44:14,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-24 21:44:14,037 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) [2023-11-24 21:44:14,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-24 21:44:14,038 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2023-11-24 21:44:14,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:44:14,038 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-24 21:44:14,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:44:14,038 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-24 21:44:14,039 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-24 21:44:14,041 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-11-24 21:44:14,042 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-24 21:44:14,043 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-24 21:44:14,043 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-24 21:44:14,043 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-24 21:44:14,043 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2023-11-24 21:44:14,044 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-24 21:44:14,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:44:14,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:44:14,254 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:44:14,257 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-24 21:44:14,260 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.11 09:44:14 BoogieIcfgContainer [2023-11-24 21:44:14,260 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-24 21:44:14,261 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-24 21:44:14,261 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-24 21:44:14,262 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-24 21:44:14,262 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:43:54" (3/4) ... [2023-11-24 21:44:14,265 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-24 21:44:14,275 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 16 nodes and edges [2023-11-24 21:44:14,275 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-24 21:44:14,275 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-24 21:44:14,276 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-24 21:44:14,380 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/witness.graphml [2023-11-24 21:44:14,381 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/witness.yml [2023-11-24 21:44:14,381 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-24 21:44:14,382 INFO L158 Benchmark]: Toolchain (without parser) took 21485.04ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 144.9MB in the beginning and 173.9MB in the end (delta: -29.0MB). Peak memory consumption was 9.0MB. Max. memory is 16.1GB. [2023-11-24 21:44:14,382 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 130.0MB. Free memory is still 102.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:44:14,383 INFO L158 Benchmark]: CACSL2BoogieTranslator took 658.63ms. Allocated memory is still 178.3MB. Free memory was 144.3MB in the beginning and 128.3MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-24 21:44:14,383 INFO L158 Benchmark]: Boogie Procedure Inliner took 83.21ms. Allocated memory is still 178.3MB. Free memory was 128.3MB in the beginning and 126.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 21:44:14,384 INFO L158 Benchmark]: Boogie Preprocessor took 75.03ms. Allocated memory is still 178.3MB. Free memory was 126.8MB in the beginning and 124.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-24 21:44:14,385 INFO L158 Benchmark]: RCFGBuilder took 484.25ms. Allocated memory is still 178.3MB. Free memory was 124.2MB in the beginning and 111.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-24 21:44:14,385 INFO L158 Benchmark]: TraceAbstraction took 20054.57ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 111.0MB in the beginning and 178.9MB in the end (delta: -67.9MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-24 21:44:14,386 INFO L158 Benchmark]: Witness Printer took 119.95ms. Allocated memory is still 213.9MB. Free memory was 178.9MB in the beginning and 173.9MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-24 21:44:14,388 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 130.0MB. Free memory is still 102.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 658.63ms. Allocated memory is still 178.3MB. Free memory was 144.3MB in the beginning and 128.3MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 83.21ms. Allocated memory is still 178.3MB. Free memory was 128.3MB in the beginning and 126.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 75.03ms. Allocated memory is still 178.3MB. Free memory was 126.8MB in the beginning and 124.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 484.25ms. Allocated memory is still 178.3MB. Free memory was 124.2MB in the beginning and 111.6MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 20054.57ms. Allocated memory was 178.3MB in the beginning and 213.9MB in the end (delta: 35.7MB). Free memory was 111.0MB in the beginning and 178.9MB in the end (delta: -67.9MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 119.95ms. Allocated memory is still 213.9MB. Free memory was 178.9MB in the beginning and 173.9MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 511]: 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, 18 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 20.0s, OverallIterations: 12, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 9.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 404 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 404 mSDsluCounter, 134 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 59 mSDsCounter, 25 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 641 IncrementalHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 25 mSolverCounterUnsat, 75 mSDtfsCounter, 641 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 157 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 11.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=9, InterpolantAutomatonStates: 76, 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, 12 MinimizatonAttempts, 12 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 8.6s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 137 ConstructedInterpolants, 18 QuantifiedInterpolants, 2337 SizeOfPredicates, 52 NumberOfNonLiveVariables, 397 ConjunctsInSsa, 144 ConjunctsInUnsatCore, 18 InterpolantComputations, 9 PerfectInterpolantSequences, 2/39 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 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-24 21:44:14,433 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_000a70d1-7261-4c39-acc1-ee36b861f3b6/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE