./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx/config/svcomp-MemCleanup-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 15d1d7d49ed223522c6431664b8ff836ebc81296f5e11773e2197361bd8b13cf --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:26:03,775 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:26:03,908 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2023-11-21 22:26:03,918 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:26:03,919 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:26:03,964 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:26:03,965 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:26:03,966 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:26:03,967 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:26:03,973 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:26:03,974 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:26:03,975 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:26:03,976 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:26:03,978 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:26:03,979 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:26:03,979 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:26:03,980 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:26:03,980 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:26:03,981 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:26:03,981 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:26:03,982 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:26:03,983 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:26:03,983 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:26:03,984 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:26:03,984 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:26:03,984 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:26:03,985 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:26:03,985 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:26:03,986 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:26:03,986 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:26:03,987 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:26:03,987 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:26:03,988 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:26:03,988 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:26:03,989 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:26:03,989 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:26:03,989 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:26:03,989 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:26:03,990 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:26:03,990 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:26:03,990 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:26:03,991 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:26:03,991 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_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15d1d7d49ed223522c6431664b8ff836ebc81296f5e11773e2197361bd8b13cf [2023-11-21 22:26:04,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:26:04,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:26:04,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:26:04,300 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:26:04,301 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:26:04,302 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2023-11-21 22:26:07,515 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:26:07,845 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:26:07,845 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/sv-benchmarks/c/heap-manipulation/merge_sort-1.i [2023-11-21 22:26:07,866 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx/data/2fa75a48e/7ba22ed92bbb45edaba447775ae6a6f3/FLAG0ea70b488 [2023-11-21 22:26:07,883 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx/data/2fa75a48e/7ba22ed92bbb45edaba447775ae6a6f3 [2023-11-21 22:26:07,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:26:07,888 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:26:07,890 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:26:07,890 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:26:07,903 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:26:07,904 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:26:07" (1/1) ... [2023-11-21 22:26:07,906 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b59fb17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:07, skipping insertion in model container [2023-11-21 22:26:07,906 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:26:07" (1/1) ... [2023-11-21 22:26:07,980 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:26:08,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:26:08,355 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:26:08,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:26:08,446 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:26:08,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:08 WrapperNode [2023-11-21 22:26:08,447 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:26:08,449 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:26:08,449 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:26:08,449 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:26:08,457 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:08" (1/1) ... [2023-11-21 22:26:08,473 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:08" (1/1) ... [2023-11-21 22:26:08,508 INFO L138 Inliner]: procedures = 125, calls = 84, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 295 [2023-11-21 22:26:08,509 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:26:08,509 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:26:08,510 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:26:08,510 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:26:08,520 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:08" (1/1) ... [2023-11-21 22:26:08,521 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:08" (1/1) ... [2023-11-21 22:26:08,527 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:08" (1/1) ... [2023-11-21 22:26:08,527 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:08" (1/1) ... [2023-11-21 22:26:08,541 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:08" (1/1) ... [2023-11-21 22:26:08,557 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:08" (1/1) ... [2023-11-21 22:26:08,560 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:08" (1/1) ... [2023-11-21 22:26:08,563 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:08" (1/1) ... [2023-11-21 22:26:08,569 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:26:08,570 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:26:08,570 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:26:08,570 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:26:08,571 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:08" (1/1) ... [2023-11-21 22:26:08,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:26:08,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:26:08,633 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:26:08,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:26:08,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:26:08,674 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2023-11-21 22:26:08,674 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2023-11-21 22:26:08,674 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2023-11-21 22:26:08,674 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2023-11-21 22:26:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:26:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:26:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:26:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:26:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 22:26:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 22:26:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:26:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:26:08,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:26:08,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:26:08,880 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:26:08,882 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:26:09,378 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:26:09,605 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:26:09,605 INFO L308 CfgBuilder]: Removed 33 assume(true) statements. [2023-11-21 22:26:09,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:26:09 BoogieIcfgContainer [2023-11-21 22:26:09,608 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:26:09,612 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:26:09,613 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:26:09,617 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:26:09,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:26:07" (1/3) ... [2023-11-21 22:26:09,618 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee49dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:26:09, skipping insertion in model container [2023-11-21 22:26:09,619 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:26:08" (2/3) ... [2023-11-21 22:26:09,620 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ee49dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:26:09, skipping insertion in model container [2023-11-21 22:26:09,622 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:26:09" (3/3) ... [2023-11-21 22:26:09,624 INFO L112 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2023-11-21 22:26:09,650 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:26:09,651 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-21 22:26:09,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:26:09,724 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;@1768932f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:26:09,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-21 22:26:09,728 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 64 states have (on average 1.890625) internal successors, (121), 81 states have internal predecessors, (121), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-21 22:26:09,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-21 22:26:09,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:09,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-21 22:26:09,736 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:26:09,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:09,741 INFO L85 PathProgramCache]: Analyzing trace with hash 13655671, now seen corresponding path program 1 times [2023-11-21 22:26:09,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:09,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177138316] [2023-11-21 22:26:09,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:09,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:09,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:09,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:09,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177138316] [2023-11-21 22:26:09,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177138316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:09,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:09,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:26:09,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336527579] [2023-11-21 22:26:09,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:09,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-21 22:26:09,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:10,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-21 22:26:10,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 22:26:10,041 INFO L87 Difference]: Start difference. First operand has 84 states, 64 states have (on average 1.890625) internal successors, (121), 81 states have internal predecessors, (121), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:10,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:10,165 INFO L93 Difference]: Finished difference Result 82 states and 104 transitions. [2023-11-21 22:26:10,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-21 22:26:10,171 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-11-21 22:26:10,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:10,185 INFO L225 Difference]: With dead ends: 82 [2023-11-21 22:26:10,185 INFO L226 Difference]: Without dead ends: 81 [2023-11-21 22:26:10,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 22:26:10,197 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:10,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 93 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:26:10,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-21 22:26:10,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-11-21 22:26:10,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.3650793650793651) internal successors, (86), 78 states have internal predecessors, (86), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:10,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 103 transitions. [2023-11-21 22:26:10,258 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 103 transitions. Word has length 4 [2023-11-21 22:26:10,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:10,258 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 103 transitions. [2023-11-21 22:26:10,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:10,259 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 103 transitions. [2023-11-21 22:26:10,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-21 22:26:10,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:10,260 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:26:10,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:26:10,261 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:26:10,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:10,264 INFO L85 PathProgramCache]: Analyzing trace with hash 422668803, now seen corresponding path program 1 times [2023-11-21 22:26:10,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:10,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999578502] [2023-11-21 22:26:10,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:10,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:10,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:10,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:10,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999578502] [2023-11-21 22:26:10,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999578502] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:10,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:10,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:26:10,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089265289] [2023-11-21 22:26:10,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:10,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:26:10,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:10,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:26:10,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:26:10,362 INFO L87 Difference]: Start difference. First operand 81 states and 103 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2023-11-21 22:26:10,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:10,529 INFO L93 Difference]: Finished difference Result 147 states and 188 transitions. [2023-11-21 22:26:10,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:26:10,530 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 [2023-11-21 22:26:10,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:10,533 INFO L225 Difference]: With dead ends: 147 [2023-11-21 22:26:10,533 INFO L226 Difference]: Without dead ends: 146 [2023-11-21 22:26:10,533 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 [2023-11-21 22:26:10,535 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 66 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:10,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 167 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:26:10,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-21 22:26:10,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 84. [2023-11-21 22:26:10,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.3636363636363635) internal successors, (90), 81 states have internal predecessors, (90), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2023-11-21 22:26:10,550 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 5 [2023-11-21 22:26:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:10,551 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2023-11-21 22:26:10,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2023-11-21 22:26:10,551 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2023-11-21 22:26:10,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 22:26:10,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:10,552 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-21 22:26:10,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:26:10,552 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:26:10,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:10,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1459623584, now seen corresponding path program 1 times [2023-11-21 22:26:10,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:10,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779989817] [2023-11-21 22:26:10,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:10,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:10,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:10,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:10,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779989817] [2023-11-21 22:26:10,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779989817] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:10,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:10,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:26:10,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799965949] [2023-11-21 22:26:10,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:10,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:26:10,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:10,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:26:10,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:26:10,693 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2023-11-21 22:26:10,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:10,787 INFO L93 Difference]: Finished difference Result 155 states and 199 transitions. [2023-11-21 22:26:10,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:26:10,788 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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 [2023-11-21 22:26:10,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:10,790 INFO L225 Difference]: With dead ends: 155 [2023-11-21 22:26:10,790 INFO L226 Difference]: Without dead ends: 155 [2023-11-21 22:26:10,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:26:10,792 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 76 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:10,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 278 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:26:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2023-11-21 22:26:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 81. [2023-11-21 22:26:10,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 78 states have internal predecessors, (85), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 102 transitions. [2023-11-21 22:26:10,806 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 102 transitions. Word has length 7 [2023-11-21 22:26:10,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:10,807 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 102 transitions. [2023-11-21 22:26:10,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 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) [2023-11-21 22:26:10,807 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 102 transitions. [2023-11-21 22:26:10,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 22:26:10,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:10,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:10,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:26:10,809 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:26:10,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:10,809 INFO L85 PathProgramCache]: Analyzing trace with hash -532587092, now seen corresponding path program 1 times [2023-11-21 22:26:10,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:10,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131266919] [2023-11-21 22:26:10,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:10,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:10,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:10,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:10,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131266919] [2023-11-21 22:26:10,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131266919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:10,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:10,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:26:10,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54160680] [2023-11-21 22:26:10,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:10,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:26:10,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:10,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:26:10,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:26:10,876 INFO L87 Difference]: Start difference. First operand 81 states and 102 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:10,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:10,947 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2023-11-21 22:26:10,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:26:10,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-21 22:26:10,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:10,950 INFO L225 Difference]: With dead ends: 84 [2023-11-21 22:26:10,950 INFO L226 Difference]: Without dead ends: 83 [2023-11-21 22:26:10,950 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 [2023-11-21 22:26:10,959 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 0 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 179 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 [2023-11-21 22:26:10,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 179 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:26:10,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-21 22:26:10,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-11-21 22:26:10,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 80 states have internal predecessors, (87), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 104 transitions. [2023-11-21 22:26:10,975 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 104 transitions. Word has length 9 [2023-11-21 22:26:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:10,976 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 104 transitions. [2023-11-21 22:26:10,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:10,976 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 104 transitions. [2023-11-21 22:26:10,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 22:26:10,977 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:10,977 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:10,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:26:10,977 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:26:10,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:10,978 INFO L85 PathProgramCache]: Analyzing trace with hash -606673271, now seen corresponding path program 1 times [2023-11-21 22:26:10,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:10,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910423735] [2023-11-21 22:26:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:10,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:11,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:11,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:11,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910423735] [2023-11-21 22:26:11,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910423735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:11,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:11,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:26:11,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594805024] [2023-11-21 22:26:11,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:11,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:26:11,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:11,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:26:11,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:26:11,175 INFO L87 Difference]: Start difference. First operand 83 states and 104 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:11,341 INFO L93 Difference]: Finished difference Result 148 states and 187 transitions. [2023-11-21 22:26:11,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:26:11,343 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-21 22:26:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:11,345 INFO L225 Difference]: With dead ends: 148 [2023-11-21 22:26:11,345 INFO L226 Difference]: Without dead ends: 148 [2023-11-21 22:26:11,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:26:11,346 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 141 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:11,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 193 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:26:11,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-11-21 22:26:11,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 86. [2023-11-21 22:26:11,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 69 states have (on average 1.318840579710145) internal successors, (91), 83 states have internal predecessors, (91), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:11,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 107 transitions. [2023-11-21 22:26:11,366 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 107 transitions. Word has length 11 [2023-11-21 22:26:11,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:11,366 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 107 transitions. [2023-11-21 22:26:11,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 107 transitions. [2023-11-21 22:26:11,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 22:26:11,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:11,368 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:11,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:26:11,369 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:26:11,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:11,370 INFO L85 PathProgramCache]: Analyzing trace with hash -269613022, now seen corresponding path program 1 times [2023-11-21 22:26:11,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:11,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765971512] [2023-11-21 22:26:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:11,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:11,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:26:11,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:11,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765971512] [2023-11-21 22:26:11,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765971512] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:11,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:11,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:26:11,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558593935] [2023-11-21 22:26:11,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:11,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:26:11,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:11,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:26:11,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:26:11,564 INFO L87 Difference]: Start difference. First operand 86 states and 107 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:11,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:11,767 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2023-11-21 22:26:11,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:26:11,768 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-21 22:26:11,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:11,769 INFO L225 Difference]: With dead ends: 85 [2023-11-21 22:26:11,769 INFO L226 Difference]: Without dead ends: 85 [2023-11-21 22:26:11,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:26:11,771 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 12 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:11,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 262 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:26:11,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-21 22:26:11,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-11-21 22:26:11,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 82 states have internal predecessors, (90), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:11,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2023-11-21 22:26:11,779 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 18 [2023-11-21 22:26:11,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:11,785 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2023-11-21 22:26:11,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:11,786 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2023-11-21 22:26:11,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-21 22:26:11,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:11,787 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:11,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:26:11,787 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:26:11,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:11,788 INFO L85 PathProgramCache]: Analyzing trace with hash 538233196, now seen corresponding path program 1 times [2023-11-21 22:26:11,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:11,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147115664] [2023-11-21 22:26:11,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:11,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:26:11,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:11,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147115664] [2023-11-21 22:26:11,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147115664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:11,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:11,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:26:11,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496774694] [2023-11-21 22:26:11,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:11,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:26:11,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:11,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:26:11,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:26:11,964 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:12,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:12,156 INFO L93 Difference]: Finished difference Result 84 states and 103 transitions. [2023-11-21 22:26:12,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:26:12,157 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-21 22:26:12,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:12,158 INFO L225 Difference]: With dead ends: 84 [2023-11-21 22:26:12,158 INFO L226 Difference]: Without dead ends: 84 [2023-11-21 22:26:12,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:26:12,159 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 12 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:12,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 252 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:26:12,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-11-21 22:26:12,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-11-21 22:26:12,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 69 states have (on average 1.289855072463768) internal successors, (89), 81 states have internal predecessors, (89), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:12,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2023-11-21 22:26:12,166 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 18 [2023-11-21 22:26:12,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:12,167 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2023-11-21 22:26:12,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2023-11-21 22:26:12,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 22:26:12,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:12,169 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:12,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:26:12,169 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:26:12,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:12,170 INFO L85 PathProgramCache]: Analyzing trace with hash -747061499, now seen corresponding path program 1 times [2023-11-21 22:26:12,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:12,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639210221] [2023-11-21 22:26:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:12,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:12,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:12,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:12,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639210221] [2023-11-21 22:26:12,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639210221] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:12,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:12,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:26:12,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101378714] [2023-11-21 22:26:12,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:12,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:26:12,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:12,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:26:12,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:26:12,367 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:12,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:12,629 INFO L93 Difference]: Finished difference Result 137 states and 167 transitions. [2023-11-21 22:26:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:26:12,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-21 22:26:12,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:12,631 INFO L225 Difference]: With dead ends: 137 [2023-11-21 22:26:12,631 INFO L226 Difference]: Without dead ends: 137 [2023-11-21 22:26:12,632 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 [2023-11-21 22:26:12,633 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 116 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:12,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 194 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:26:12,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-21 22:26:12,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 90. [2023-11-21 22:26:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 87 states have internal predecessors, (95), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 109 transitions. [2023-11-21 22:26:12,640 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 109 transitions. Word has length 21 [2023-11-21 22:26:12,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:12,641 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 109 transitions. [2023-11-21 22:26:12,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 109 transitions. [2023-11-21 22:26:12,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 22:26:12,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:12,642 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:12,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-21 22:26:12,643 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:26:12,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:12,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1078775644, now seen corresponding path program 1 times [2023-11-21 22:26:12,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:12,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321825289] [2023-11-21 22:26:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:12,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:12,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:26:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:26:12,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:26:12,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321825289] [2023-11-21 22:26:12,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321825289] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:26:12,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:26:12,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:26:12,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81799913] [2023-11-21 22:26:12,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:26:12,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:26:12,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:26:12,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:26:12,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:26:12,783 INFO L87 Difference]: Start difference. First operand 90 states and 109 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:13,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:26:13,026 INFO L93 Difference]: Finished difference Result 136 states and 165 transitions. [2023-11-21 22:26:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:26:13,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-21 22:26:13,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:26:13,028 INFO L225 Difference]: With dead ends: 136 [2023-11-21 22:26:13,028 INFO L226 Difference]: Without dead ends: 136 [2023-11-21 22:26:13,029 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 [2023-11-21 22:26:13,029 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 114 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:26:13,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 194 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:26:13,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-11-21 22:26:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 96. [2023-11-21 22:26:13,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 81 states have (on average 1.2469135802469136) internal successors, (101), 93 states have internal predecessors, (101), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:26:13,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2023-11-21 22:26:13,037 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 21 [2023-11-21 22:26:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:26:13,038 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2023-11-21 22:26:13,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:26:13,038 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2023-11-21 22:26:13,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 22:26:13,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:26:13,039 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:13,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:26:13,040 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK] === [2023-11-21 22:26:13,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:26:13,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1447152879, now seen corresponding path program 1 times [2023-11-21 22:26:13,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:26:13,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780772046] [2023-11-21 22:26:13,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:26:13,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:26:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:26:13,068 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 22:26:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:26:13,112 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 22:26:13,112 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 22:26:13,113 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 2 remaining) [2023-11-21 22:26:13,116 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 2 remaining) [2023-11-21 22:26:13,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:26:13,120 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:26:13,125 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 22:26:13,140 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem26 [2023-11-21 22:26:13,141 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem27 [2023-11-21 22:26:13,142 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem28 [2023-11-21 22:26:13,142 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem29 [2023-11-21 22:26:13,142 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem30 [2023-11-21 22:26:13,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 10:26:13 BoogieIcfgContainer [2023-11-21 22:26:13,150 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 22:26:13,150 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 22:26:13,151 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 22:26:13,151 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 22:26:13,151 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:26:09" (3/4) ... [2023-11-21 22:26:13,152 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-21 22:26:13,158 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem26 [2023-11-21 22:26:13,159 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem27 [2023-11-21 22:26:13,159 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem28 [2023-11-21 22:26:13,160 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem29 [2023-11-21 22:26:13,160 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem30 [2023-11-21 22:26:13,193 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx/witness.graphml [2023-11-21 22:26:13,194 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 22:26:13,194 INFO L158 Benchmark]: Toolchain (without parser) took 5306.56ms. Allocated memory was 151.0MB in the beginning and 195.0MB in the end (delta: 44.0MB). Free memory was 105.3MB in the beginning and 101.9MB in the end (delta: 3.4MB). Peak memory consumption was 49.3MB. Max. memory is 16.1GB. [2023-11-21 22:26:13,195 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 115.3MB. Free memory is still 64.5MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:26:13,195 INFO L158 Benchmark]: CACSL2BoogieTranslator took 557.87ms. Allocated memory is still 151.0MB. Free memory was 105.1MB in the beginning and 86.8MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-21 22:26:13,196 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.26ms. Allocated memory is still 151.0MB. Free memory was 86.5MB in the beginning and 83.9MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-21 22:26:13,196 INFO L158 Benchmark]: Boogie Preprocessor took 59.34ms. Allocated memory is still 151.0MB. Free memory was 83.9MB in the beginning and 81.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 22:26:13,196 INFO L158 Benchmark]: RCFGBuilder took 1039.18ms. Allocated memory is still 151.0MB. Free memory was 81.1MB in the beginning and 85.4MB in the end (delta: -4.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2023-11-21 22:26:13,197 INFO L158 Benchmark]: TraceAbstraction took 3537.52ms. Allocated memory was 151.0MB in the beginning and 195.0MB in the end (delta: 44.0MB). Free memory was 84.5MB in the beginning and 104.0MB in the end (delta: -19.5MB). Peak memory consumption was 26.5MB. Max. memory is 16.1GB. [2023-11-21 22:26:13,197 INFO L158 Benchmark]: Witness Printer took 43.33ms. Allocated memory is still 195.0MB. Free memory was 104.0MB in the beginning and 101.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 22:26:13,199 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 115.3MB. Free memory is still 64.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 557.87ms. Allocated memory is still 151.0MB. Free memory was 105.1MB in the beginning and 86.8MB in the end (delta: 18.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.26ms. Allocated memory is still 151.0MB. Free memory was 86.5MB in the beginning and 83.9MB in the end (delta: 2.6MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.34ms. Allocated memory is still 151.0MB. Free memory was 83.9MB in the beginning and 81.3MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1039.18ms. Allocated memory is still 151.0MB. Free memory was 81.1MB in the beginning and 85.4MB in the end (delta: -4.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 3537.52ms. Allocated memory was 151.0MB in the beginning and 195.0MB in the end (delta: 44.0MB). Free memory was 84.5MB in the beginning and 104.0MB in the end (delta: -19.5MB). Peak memory consumption was 26.5MB. Max. memory is 16.1GB. * Witness Printer took 43.33ms. Allocated memory is still 195.0MB. Free memory was 104.0MB in the beginning and 101.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem26 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem27 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem28 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem29 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem30 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem26 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem27 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem28 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem29 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem30 - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * 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 - CounterExampleResult [Line: 12]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L638] struct list *data = ((void *)0); VAL [data={0:0}] [L639] COND TRUE __VERIFIER_nondet_int() [L640] struct node *node = malloc(sizeof *node); [L641] COND FALSE, EXPR !(!node) [L643] EXPR node->next = node [L644] EXPR node->value = __VERIFIER_nondet_int() [L645] struct list *item = malloc(sizeof *item); [L646] COND FALSE, EXPR !(!item) [L648] EXPR item->slist = node [L649] EXPR item->next = data [L650] EXPR data = item [L639-L651] { struct node *node = malloc(sizeof *node); if (!node) abort(); node->next = node; node->value = __VERIFIER_nondet_int(); struct list *item = malloc(sizeof *item); if (!item) abort(); item->slist = node; item->next = data; data = item; } VAL [data={-3:0}] [L639] COND FALSE !(__VERIFIER_nondet_int()) [L652] COND FALSE !(!data) [L654] CALL inspect_before(data) [L615] COND FALSE !(!(shape)) VAL [shape={-3:0}, shape={-3:0}] [L616] shape->next VAL [shape={-3:0}, shape={-3:0}] [L616] COND FALSE !(shape->next) [L622] COND FALSE !(!(shape)) VAL [shape={-3:0}, shape={-3:0}] [L623] EXPR shape->next VAL [shape={-3:0}, shape={-3:0}] [L623] COND FALSE !(!(shape->next == ((void *)0))) [L624] EXPR shape->slist VAL [shape={-3:0}, shape={-3:0}] [L624] COND FALSE !(!(shape->slist)) [L625] EXPR shape->slist [L625] EXPR shape->slist->next VAL [shape={-3:0}, shape={-3:0}] [L625] COND TRUE !(shape->slist->next == ((void *)0)) [L625] CALL fail() [L565] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "merge_sort-1.c", 3, __extension__ __PRETTY_FUNCTION__) - UnprovableResult [Line: 636]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 84 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 3.4s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 541 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 537 mSDsluCounter, 1812 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1006 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 717 IncrementalHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 806 mSDtfsCounter, 717 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=9, InterpolantAutomatonStates: 35, 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, 9 MinimizatonAttempts, 285 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 504 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 12/12 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 RESULT: Ultimate proved your program to be incorrect! [2023-11-21 22:26:13,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd23ec0c-647f-48e2-8596-004c8b1de548/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup)