./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/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_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/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-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 277634da297b7f9e262585608ed7ad62cca7d59b0122d4e61ee1b4b78256acae --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:14:51,216 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:14:51,290 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:14:51,296 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:14:51,297 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:14:51,329 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:14:51,330 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:14:51,331 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:14:51,332 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:14:51,333 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:14:51,334 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:14:51,335 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:14:51,335 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:14:51,336 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:14:51,337 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:14:51,338 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:14:51,338 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:14:51,339 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:14:51,340 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:14:51,340 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:14:51,341 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:14:51,342 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:14:51,343 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:14:51,343 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:14:51,344 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:14:51,344 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:14:51,345 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:14:51,345 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:14:51,346 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:14:51,346 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:14:51,347 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:14:51,348 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:14:51,348 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:14:51,349 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:14:51,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:14:51,350 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:14:51,350 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:14:51,351 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:14:51,351 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:14:51,352 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_4e0177b7-7194-4111-ad93-3e3bb918b362/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 277634da297b7f9e262585608ed7ad62cca7d59b0122d4e61ee1b4b78256acae [2023-11-21 22:14:51,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:14:51,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:14:51,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:14:51,742 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:14:51,742 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:14:51,744 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2023-11-21 22:14:55,052 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:14:55,343 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:14:55,343 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2023-11-21 22:14:55,364 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/data/d9e835df0/3b4c926213f84a6e9c0ff98fceecf6e0/FLAG0ba12ebf6 [2023-11-21 22:14:55,382 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/data/d9e835df0/3b4c926213f84a6e9c0ff98fceecf6e0 [2023-11-21 22:14:55,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:14:55,386 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:14:55,388 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:14:55,388 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:14:55,393 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:14:55,394 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:14:55" (1/1) ... [2023-11-21 22:14:55,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@531cd1f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:55, skipping insertion in model container [2023-11-21 22:14:55,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:14:55" (1/1) ... [2023-11-21 22:14:55,456 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:14:55,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:14:55,822 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:14:55,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:14:55,947 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:14:55,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:55 WrapperNode [2023-11-21 22:14:55,948 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:14:55,949 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:14:55,949 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:14:55,950 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:14:55,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:55" (1/1) ... [2023-11-21 22:14:55,990 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:55" (1/1) ... [2023-11-21 22:14:56,030 INFO L138 Inliner]: procedures = 127, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 120 [2023-11-21 22:14:56,030 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:14:56,031 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:14:56,032 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:14:56,032 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:14:56,043 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:55" (1/1) ... [2023-11-21 22:14:56,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:55" (1/1) ... [2023-11-21 22:14:56,068 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:55" (1/1) ... [2023-11-21 22:14:56,068 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:55" (1/1) ... [2023-11-21 22:14:56,077 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:55" (1/1) ... [2023-11-21 22:14:56,091 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:55" (1/1) ... [2023-11-21 22:14:56,093 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:55" (1/1) ... [2023-11-21 22:14:56,095 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:55" (1/1) ... [2023-11-21 22:14:56,099 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:14:56,100 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:14:56,100 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:14:56,100 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:14:56,101 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:55" (1/1) ... [2023-11-21 22:14:56,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:14:56,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:14:56,150 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:14:56,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:14:56,190 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:14:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-21 22:14:56,191 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-21 22:14:56,191 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-21 22:14:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:14:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:14:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:14:56,192 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-21 22:14:56,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 22:14:56,193 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:14:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 22:14:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:14:56,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:14:56,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:14:56,336 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:14:56,338 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:14:56,662 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:14:56,756 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:14:56,756 INFO L308 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-21 22:14:56,758 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:14:56 BoogieIcfgContainer [2023-11-21 22:14:56,758 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:14:56,761 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:14:56,762 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:14:56,765 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:14:56,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:14:55" (1/3) ... [2023-11-21 22:14:56,767 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20cf9bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:14:56, skipping insertion in model container [2023-11-21 22:14:56,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:14:55" (2/3) ... [2023-11-21 22:14:56,767 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20cf9bb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:14:56, skipping insertion in model container [2023-11-21 22:14:56,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:14:56" (3/3) ... [2023-11-21 22:14:56,769 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_unequal.i [2023-11-21 22:14:56,791 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:14:56,796 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2023-11-21 22:14:56,847 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:14:56,853 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;@4470b420, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:14:56,854 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-11-21 22:14:56,859 INFO L276 IsEmpty]: Start isEmpty. Operand has 68 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:14:56,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 22:14:56,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:56,869 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:14:56,869 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:14:56,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:56,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1129622461, now seen corresponding path program 1 times [2023-11-21 22:14:56,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:56,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907212893] [2023-11-21 22:14:56,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:56,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:57,329 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 22:14:57,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:57,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907212893] [2023-11-21 22:14:57,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907212893] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:57,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:57,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:14:57,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640776264] [2023-11-21 22:14:57,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:57,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:14:57,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:57,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:14:57,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:14:57,379 INFO L87 Difference]: Start difference. First operand has 68 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 64 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 22:14:57,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:57,491 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2023-11-21 22:14:57,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:14:57,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 6 [2023-11-21 22:14:57,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:57,504 INFO L225 Difference]: With dead ends: 73 [2023-11-21 22:14:57,504 INFO L226 Difference]: Without dead ends: 71 [2023-11-21 22:14:57,506 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 22:14:57,511 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 4 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:57,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 116 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:14:57,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-21 22:14:57,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2023-11-21 22:14:57,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 32 states have (on average 2.09375) internal successors, (67), 62 states have internal predecessors, (67), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:14:57,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2023-11-21 22:14:57,566 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 6 [2023-11-21 22:14:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:57,567 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2023-11-21 22:14:57,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 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 22:14:57,567 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2023-11-21 22:14:57,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 22:14:57,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:57,568 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:14:57,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:14:57,569 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:14:57,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash 986417124, now seen corresponding path program 1 times [2023-11-21 22:14:57,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:57,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073698023] [2023-11-21 22:14:57,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:57,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:57,712 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 22:14:57,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:57,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073698023] [2023-11-21 22:14:57,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073698023] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:57,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:57,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:14:57,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527944873] [2023-11-21 22:14:57,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:57,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:14:57,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:57,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:14:57,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:14:57,717 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 22:14:57,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:57,839 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2023-11-21 22:14:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:14:57,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2023-11-21 22:14:57,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:57,842 INFO L225 Difference]: With dead ends: 64 [2023-11-21 22:14:57,842 INFO L226 Difference]: Without dead ends: 64 [2023-11-21 22:14:57,842 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 22:14:57,844 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 4 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:57,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 82 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:14:57,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-21 22:14:57,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-21 22:14:57,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 32 states have (on average 2.03125) internal successors, (65), 60 states have internal predecessors, (65), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:14:57,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2023-11-21 22:14:57,858 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 6 [2023-11-21 22:14:57,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:57,860 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2023-11-21 22:14:57,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 22:14:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2023-11-21 22:14:57,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 22:14:57,861 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:57,861 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:14:57,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:14:57,862 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:14:57,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:57,863 INFO L85 PathProgramCache]: Analyzing trace with hash 986417125, now seen corresponding path program 1 times [2023-11-21 22:14:57,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:57,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530018112] [2023-11-21 22:14:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:57,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:58,016 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 22:14:58,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:58,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530018112] [2023-11-21 22:14:58,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530018112] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:58,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:58,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:14:58,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752138637] [2023-11-21 22:14:58,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:58,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:14:58,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:58,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:14:58,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:14:58,020 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 22:14:58,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:58,108 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2023-11-21 22:14:58,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:14:58,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 6 [2023-11-21 22:14:58,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:58,111 INFO L225 Difference]: With dead ends: 62 [2023-11-21 22:14:58,111 INFO L226 Difference]: Without dead ends: 62 [2023-11-21 22:14:58,112 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 22:14:58,114 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 2 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:58,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 85 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:14:58,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-21 22:14:58,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-21 22:14:58,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 32 states have (on average 1.96875) internal successors, (63), 58 states have internal predecessors, (63), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:14:58,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 67 transitions. [2023-11-21 22:14:58,125 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 67 transitions. Word has length 6 [2023-11-21 22:14:58,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:58,126 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 67 transitions. [2023-11-21 22:14:58,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 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 22:14:58,127 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 67 transitions. [2023-11-21 22:14:58,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 22:14:58,128 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:58,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:58,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:14:58,129 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:14:58,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:58,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1484371925, now seen corresponding path program 1 times [2023-11-21 22:14:58,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:58,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055611944] [2023-11-21 22:14:58,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:58,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:58,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:14:58,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:58,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055611944] [2023-11-21 22:14:58,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055611944] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:58,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:58,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:14:58,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961170618] [2023-11-21 22:14:58,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:58,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:14:58,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:58,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:14:58,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:14:58,333 INFO L87 Difference]: Start difference. First operand 62 states and 67 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:14:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:58,545 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2023-11-21 22:14:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:14:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-21 22:14:58,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:58,550 INFO L225 Difference]: With dead ends: 62 [2023-11-21 22:14:58,550 INFO L226 Difference]: Without dead ends: 62 [2023-11-21 22:14:58,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:14:58,553 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 5 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:58,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 187 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:14:58,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-21 22:14:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2023-11-21 22:14:58,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 32 states have (on average 1.9375) internal successors, (62), 57 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:14:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2023-11-21 22:14:58,563 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 10 [2023-11-21 22:14:58,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:58,564 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2023-11-21 22:14:58,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:14:58,564 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2023-11-21 22:14:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-21 22:14:58,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:58,565 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:58,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:14:58,566 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:14:58,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:58,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1484371926, now seen corresponding path program 1 times [2023-11-21 22:14:58,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:58,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145764034] [2023-11-21 22:14:58,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:58,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:58,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:58,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:58,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:59,022 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 22:14:59,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:59,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145764034] [2023-11-21 22:14:59,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145764034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:14:59,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:14:59,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:14:59,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109330673] [2023-11-21 22:14:59,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:14:59,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:14:59,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:59,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:14:59,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:14:59,034 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:14:59,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:59,264 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2023-11-21 22:14:59,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:14:59,265 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-21 22:14:59,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:59,267 INFO L225 Difference]: With dead ends: 61 [2023-11-21 22:14:59,268 INFO L226 Difference]: Without dead ends: 61 [2023-11-21 22:14:59,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:14:59,280 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 3 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:59,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 199 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:14:59,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-21 22:14:59,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2023-11-21 22:14:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 32 states have (on average 1.90625) internal successors, (61), 56 states have internal predecessors, (61), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:14:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2023-11-21 22:14:59,299 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 10 [2023-11-21 22:14:59,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:59,300 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2023-11-21 22:14:59,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:14:59,301 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2023-11-21 22:14:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-21 22:14:59,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:59,303 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:14:59,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:14:59,303 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:14:59,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:14:59,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1563366557, now seen corresponding path program 1 times [2023-11-21 22:14:59,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:14:59,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000465335] [2023-11-21 22:14:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:59,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:14:59,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:59,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:14:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:59,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:14:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:14:59,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:14:59,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000465335] [2023-11-21 22:14:59,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000465335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:14:59,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253435548] [2023-11-21 22:14:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:14:59,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:14:59,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:14:59,524 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:14:59,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:14:59,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:14:59,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:14:59,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:14:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:14:59,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:14:59,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:14:59,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253435548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:14:59,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:14:59,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-11-21 22:14:59,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526863425] [2023-11-21 22:14:59,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:14:59,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:14:59,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:14:59,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:14:59,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:14:59,819 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 22:14:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:14:59,961 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2023-11-21 22:14:59,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:14:59,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 19 [2023-11-21 22:14:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:14:59,963 INFO L225 Difference]: With dead ends: 64 [2023-11-21 22:14:59,963 INFO L226 Difference]: Without dead ends: 64 [2023-11-21 22:14:59,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:14:59,965 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:14:59,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 117 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:14:59,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-11-21 22:14:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2023-11-21 22:14:59,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 59 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:14:59,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2023-11-21 22:14:59,973 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 19 [2023-11-21 22:14:59,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:14:59,973 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2023-11-21 22:14:59,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 22:14:59,974 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2023-11-21 22:14:59,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 22:14:59,975 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:14:59,975 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:00,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:00,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:00,189 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:15:00,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:00,190 INFO L85 PathProgramCache]: Analyzing trace with hash -150015536, now seen corresponding path program 2 times [2023-11-21 22:15:00,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:00,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076083355] [2023-11-21 22:15:00,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:00,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:00,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:00,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:15:00,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:00,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:15:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 22:15:01,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:01,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076083355] [2023-11-21 22:15:01,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076083355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:01,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:01,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:15:01,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225234966] [2023-11-21 22:15:01,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:01,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:15:01,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:01,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:15:01,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:15:01,012 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:01,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:01,161 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2023-11-21 22:15:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:15:01,162 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-11-21 22:15:01,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:01,164 INFO L225 Difference]: With dead ends: 70 [2023-11-21 22:15:01,164 INFO L226 Difference]: Without dead ends: 70 [2023-11-21 22:15:01,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:15:01,166 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 52 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:01,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 79 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:15:01,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-21 22:15:01,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2023-11-21 22:15:01,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 55 states have internal predecessors, (60), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:15:01,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2023-11-21 22:15:01,191 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 28 [2023-11-21 22:15:01,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:01,192 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2023-11-21 22:15:01,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:01,193 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2023-11-21 22:15:01,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-21 22:15:01,194 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:01,194 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:01,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-21 22:15:01,195 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:15:01,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash -150015535, now seen corresponding path program 1 times [2023-11-21 22:15:01,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:01,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493681375] [2023-11-21 22:15:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:01,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:01,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:02,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:15:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:02,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:15:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 22:15:02,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:02,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493681375] [2023-11-21 22:15:02,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493681375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:02,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127272026] [2023-11-21 22:15:02,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:02,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:02,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:02,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:02,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:15:02,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:02,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-21 22:15:02,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:02,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 22:15:02,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 22:15:02,560 WARN L876 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2023-11-21 22:15:02,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:02,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:15:02,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 22:15:02,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:02,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:15:02,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 22:15:02,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:02,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:15:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 22:15:02,880 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:15:02,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127272026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:02,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:15:02,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2023-11-21 22:15:02,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807220816] [2023-11-21 22:15:02,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:02,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:15:02,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:02,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:15:02,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=167, Unknown=1, NotChecked=26, Total=240 [2023-11-21 22:15:02,883 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:03,011 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2023-11-21 22:15:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:15:03,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-11-21 22:15:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:03,013 INFO L225 Difference]: With dead ends: 58 [2023-11-21 22:15:03,013 INFO L226 Difference]: Without dead ends: 58 [2023-11-21 22:15:03,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=192, Unknown=1, NotChecked=28, Total=272 [2023-11-21 22:15:03,015 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:03,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 116 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 89 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2023-11-21 22:15:03,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-21 22:15:03,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-11-21 22:15:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 53 states have internal predecessors, (58), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:15:03,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 64 transitions. [2023-11-21 22:15:03,021 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 64 transitions. Word has length 28 [2023-11-21 22:15:03,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:03,022 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 64 transitions. [2023-11-21 22:15:03,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:03,022 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 64 transitions. [2023-11-21 22:15:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 22:15:03,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:03,024 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:03,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:03,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:03,247 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:15:03,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:03,248 INFO L85 PathProgramCache]: Analyzing trace with hash -355514319, now seen corresponding path program 1 times [2023-11-21 22:15:03,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:03,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855264492] [2023-11-21 22:15:03,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:03,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:15:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:15:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 22:15:03,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:03,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855264492] [2023-11-21 22:15:03,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855264492] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:03,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:03,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:15:03,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417504888] [2023-11-21 22:15:03,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:03,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:15:03,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:03,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:15:03,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:15:03,605 INFO L87 Difference]: Start difference. First operand 58 states and 64 transitions. Second operand has 7 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 22:15:03,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:03,785 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2023-11-21 22:15:03,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:15:03,786 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-11-21 22:15:03,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:03,787 INFO L225 Difference]: With dead ends: 57 [2023-11-21 22:15:03,787 INFO L226 Difference]: Without dead ends: 57 [2023-11-21 22:15:03,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:15:03,788 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:03,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 163 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:15:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-21 22:15:03,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-21 22:15:03,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 52 states have internal predecessors, (57), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:15:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2023-11-21 22:15:03,793 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 29 [2023-11-21 22:15:03,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:03,794 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2023-11-21 22:15:03,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 22:15:03,795 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2023-11-21 22:15:03,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 22:15:03,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:03,796 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:03,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-21 22:15:03,797 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:15:03,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:03,797 INFO L85 PathProgramCache]: Analyzing trace with hash -355514320, now seen corresponding path program 1 times [2023-11-21 22:15:03,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:03,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389210804] [2023-11-21 22:15:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:03,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:15:03,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:03,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:15:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-21 22:15:04,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:04,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389210804] [2023-11-21 22:15:04,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389210804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:04,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:04,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-21 22:15:04,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330907466] [2023-11-21 22:15:04,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:04,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-21 22:15:04,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:04,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-21 22:15:04,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:15:04,047 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 7 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 22:15:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:04,242 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2023-11-21 22:15:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:15:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-11-21 22:15:04,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:04,243 INFO L225 Difference]: With dead ends: 56 [2023-11-21 22:15:04,243 INFO L226 Difference]: Without dead ends: 56 [2023-11-21 22:15:04,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:15:04,245 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 3 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:04,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 159 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:15:04,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-21 22:15:04,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-21 22:15:04,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 35 states have (on average 1.6) internal successors, (56), 51 states have internal predecessors, (56), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:15:04,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2023-11-21 22:15:04,249 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 29 [2023-11-21 22:15:04,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:04,250 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2023-11-21 22:15:04,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 22:15:04,251 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2023-11-21 22:15:04,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-21 22:15:04,252 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:04,252 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:04,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:15:04,253 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:15:04,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:04,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1948241334, now seen corresponding path program 1 times [2023-11-21 22:15:04,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:04,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743968619] [2023-11-21 22:15:04,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:04,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:04,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:04,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:04,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:15:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:04,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:15:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-21 22:15:04,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:04,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743968619] [2023-11-21 22:15:04,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743968619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:04,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:04,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-21 22:15:04,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469405434] [2023-11-21 22:15:04,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:04,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-21 22:15:04,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:04,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-21 22:15:04,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-21 22:15:04,616 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:04,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:04,749 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2023-11-21 22:15:04,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:15:04,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2023-11-21 22:15:04,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:04,750 INFO L225 Difference]: With dead ends: 54 [2023-11-21 22:15:04,751 INFO L226 Difference]: Without dead ends: 54 [2023-11-21 22:15:04,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:15:04,752 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 39 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:04,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 117 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:15:04,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-21 22:15:04,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-21 22:15:04,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 35 states have (on average 1.542857142857143) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:15:04,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2023-11-21 22:15:04,756 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 31 [2023-11-21 22:15:04,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:04,757 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2023-11-21 22:15:04,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:04,757 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2023-11-21 22:15:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-21 22:15:04,758 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:04,759 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:04,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:15:04,759 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:15:04,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:04,760 INFO L85 PathProgramCache]: Analyzing trace with hash 265942695, now seen corresponding path program 1 times [2023-11-21 22:15:04,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:04,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323953964] [2023-11-21 22:15:04,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:04,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:15:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:15:05,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-21 22:15:05,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:05,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323953964] [2023-11-21 22:15:05,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323953964] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:05,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:05,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 22:15:05,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42053541] [2023-11-21 22:15:05,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:05,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:15:05,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:05,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:15:05,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:15:05,209 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand has 10 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:05,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:05,414 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2023-11-21 22:15:05,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:15:05,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-21 22:15:05,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:05,416 INFO L225 Difference]: With dead ends: 65 [2023-11-21 22:15:05,416 INFO L226 Difference]: Without dead ends: 65 [2023-11-21 22:15:05,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:15:05,418 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 47 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:05,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 152 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:15:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-21 22:15:05,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2023-11-21 22:15:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.457142857142857) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:15:05,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2023-11-21 22:15:05,422 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 32 [2023-11-21 22:15:05,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:05,423 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2023-11-21 22:15:05,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:05,423 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2023-11-21 22:15:05,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-21 22:15:05,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:05,424 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:05,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:15:05,425 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:15:05,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:05,425 INFO L85 PathProgramCache]: Analyzing trace with hash 265942696, now seen corresponding path program 1 times [2023-11-21 22:15:05,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:05,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662482742] [2023-11-21 22:15:05,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:05,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:05,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:15:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:05,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:15:06,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:06,081 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 22:15:06,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:06,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662482742] [2023-11-21 22:15:06,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662482742] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:06,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:06,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-21 22:15:06,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993937046] [2023-11-21 22:15:06,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:06,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:15:06,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:06,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:15:06,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:15:06,084 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 10 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:06,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:06,263 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2023-11-21 22:15:06,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-21 22:15:06,264 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2023-11-21 22:15:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:06,265 INFO L225 Difference]: With dead ends: 53 [2023-11-21 22:15:06,265 INFO L226 Difference]: Without dead ends: 53 [2023-11-21 22:15:06,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:15:06,267 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 40 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:06,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 140 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:15:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-21 22:15:06,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2023-11-21 22:15:06,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.4) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:15:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2023-11-21 22:15:06,271 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 32 [2023-11-21 22:15:06,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:06,271 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2023-11-21 22:15:06,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:06,272 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2023-11-21 22:15:06,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-21 22:15:06,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:06,273 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:06,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-21 22:15:06,274 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:15:06,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:06,274 INFO L85 PathProgramCache]: Analyzing trace with hash 254392455, now seen corresponding path program 1 times [2023-11-21 22:15:06,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:06,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724883274] [2023-11-21 22:15:06,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:06,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:06,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:06,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:06,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:15:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:06,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:15:07,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-21 22:15:07,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:07,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724883274] [2023-11-21 22:15:07,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724883274] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:07,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:15:07,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-11-21 22:15:07,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117284650] [2023-11-21 22:15:07,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:07,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 22:15:07,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:07,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 22:15:07,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:15:07,163 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:07,471 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2023-11-21 22:15:07,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:15:07,472 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2023-11-21 22:15:07,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:07,472 INFO L225 Difference]: With dead ends: 49 [2023-11-21 22:15:07,472 INFO L226 Difference]: Without dead ends: 49 [2023-11-21 22:15:07,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-21 22:15:07,473 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 68 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:07,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 191 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:15:07,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-21 22:15:07,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-21 22:15:07,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 44 states have internal predecessors, (48), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:15:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2023-11-21 22:15:07,476 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 36 [2023-11-21 22:15:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:07,477 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2023-11-21 22:15:07,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2023-11-21 22:15:07,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-21 22:15:07,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:07,478 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:07,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-21 22:15:07,478 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:15:07,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:07,479 INFO L85 PathProgramCache]: Analyzing trace with hash 254483945, now seen corresponding path program 1 times [2023-11-21 22:15:07,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:07,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907503134] [2023-11-21 22:15:07,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:07,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:08,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:08,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:15:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:08,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:15:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:08,902 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 22:15:08,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:08,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907503134] [2023-11-21 22:15:08,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907503134] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:08,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378024764] [2023-11-21 22:15:08,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:08,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:08,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:08,908 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:08,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:15:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:09,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-21 22:15:09,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:09,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 5 [2023-11-21 22:15:09,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-21 22:15:09,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:09,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-21 22:15:09,702 INFO L349 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-21 22:15:09,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 24 [2023-11-21 22:15:10,082 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:10,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:10,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2023-11-21 22:15:10,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:10,210 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:10,213 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:10,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 28 [2023-11-21 22:15:10,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:10,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:10,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:10,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:10,785 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:10,797 INFO L349 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2023-11-21 22:15:10,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 42 [2023-11-21 22:15:10,814 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 22:15:10,817 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-21 22:15:10,818 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:15:10,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378024764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:10,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:15:10,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [19] total 33 [2023-11-21 22:15:10,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373673715] [2023-11-21 22:15:10,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:10,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:15:10,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:10,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:15:10,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122 [2023-11-21 22:15:10,822 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 17 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:12,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:12,181 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2023-11-21 22:15:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 22:15:12,182 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2023-11-21 22:15:12,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:12,183 INFO L225 Difference]: With dead ends: 78 [2023-11-21 22:15:12,183 INFO L226 Difference]: Without dead ends: 78 [2023-11-21 22:15:12,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=156, Invalid=1650, Unknown=0, NotChecked=0, Total=1806 [2023-11-21 22:15:12,185 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 136 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:12,186 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 207 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:15:12,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-11-21 22:15:12,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 51. [2023-11-21 22:15:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 46 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:15:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2023-11-21 22:15:12,189 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 36 [2023-11-21 22:15:12,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:12,195 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2023-11-21 22:15:12,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:15:12,197 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2023-11-21 22:15:12,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-21 22:15:12,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:12,201 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:12,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-21 22:15:12,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-21 22:15:12,416 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:15:12,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:12,417 INFO L85 PathProgramCache]: Analyzing trace with hash 254483946, now seen corresponding path program 1 times [2023-11-21 22:15:12,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:12,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028548998] [2023-11-21 22:15:12,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:12,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:14,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:14,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:15:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:14,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:15:14,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:15:14,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:14,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028548998] [2023-11-21 22:15:14,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028548998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:14,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320032165] [2023-11-21 22:15:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:14,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:14,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:14,844 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:14,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:15:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:15,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-21 22:15:15,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:15,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-21 22:15:15,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-11-21 22:15:15,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:15,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-21 22:15:15,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:15,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-21 22:15:15,984 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-21 22:15:15,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-11-21 22:15:15,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-21 22:15:16,404 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:16,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:16,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 24 [2023-11-21 22:15:16,433 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:16,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:16,436 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 18 [2023-11-21 22:15:16,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:16,597 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:16,600 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:16,601 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 28 [2023-11-21 22:15:16,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:16,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 20 [2023-11-21 22:15:16,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-21 22:15:17,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:17,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:17,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:17,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:17,232 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:17,246 INFO L349 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2023-11-21 22:15:17,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 96 treesize of output 58 [2023-11-21 22:15:17,259 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:17,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-11-21 22:15:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:15:17,371 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:15:17,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320032165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:15:17,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:15:17,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [21] total 40 [2023-11-21 22:15:17,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906161477] [2023-11-21 22:15:17,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:15:17,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-21 22:15:17,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:17,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-21 22:15:17,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2023-11-21 22:15:17,375 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 22:15:19,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:19,233 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2023-11-21 22:15:19,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-21 22:15:19,234 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2023-11-21 22:15:19,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:19,235 INFO L225 Difference]: With dead ends: 71 [2023-11-21 22:15:19,235 INFO L226 Difference]: Without dead ends: 71 [2023-11-21 22:15:19,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=194, Invalid=2458, Unknown=0, NotChecked=0, Total=2652 [2023-11-21 22:15:19,238 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 131 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:19,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 281 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-21 22:15:19,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-11-21 22:15:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 52. [2023-11-21 22:15:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 38 states have (on average 1.368421052631579) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:15:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2023-11-21 22:15:19,243 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 36 [2023-11-21 22:15:19,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:19,244 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2023-11-21 22:15:19,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-21 22:15:19,244 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2023-11-21 22:15:19,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-21 22:15:19,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:19,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:19,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:19,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-21 22:15:19,468 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:15:19,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:19,469 INFO L85 PathProgramCache]: Analyzing trace with hash 806868188, now seen corresponding path program 1 times [2023-11-21 22:15:19,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:19,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205065706] [2023-11-21 22:15:19,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:19,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:19,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:20,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:20,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:20,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:15:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:20,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:15:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:15:20,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:20,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205065706] [2023-11-21 22:15:20,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205065706] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:20,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852894434] [2023-11-21 22:15:20,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:20,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:20,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:20,744 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:20,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:15:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:20,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-21 22:15:20,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:21,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-21 22:15:21,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:21,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-11-21 22:15:21,645 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:21,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:21,647 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-11-21 22:15:21,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:21,751 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:21,752 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:21,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 21 [2023-11-21 22:15:21,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-21 22:15:21,878 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:21,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-21 22:15:22,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:22,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:22,185 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:22,186 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:22,195 INFO L349 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2023-11-21 22:15:22,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 37 treesize of output 25 [2023-11-21 22:15:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:15:22,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:15:22,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-11-21 22:15:24,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852894434] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:24,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:15:24,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 36 [2023-11-21 22:15:24,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772324852] [2023-11-21 22:15:24,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:15:24,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-21 22:15:24,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:24,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-21 22:15:24,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1676, Unknown=2, NotChecked=0, Total=1806 [2023-11-21 22:15:24,062 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 36 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 22:15:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:15:25,871 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2023-11-21 22:15:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-21 22:15:25,872 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2023-11-21 22:15:25,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:15:25,873 INFO L225 Difference]: With dead ends: 57 [2023-11-21 22:15:25,873 INFO L226 Difference]: Without dead ends: 57 [2023-11-21 22:15:25,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=257, Invalid=2821, Unknown=2, NotChecked=0, Total=3080 [2023-11-21 22:15:25,875 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 174 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-21 22:15:25,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 503 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-21 22:15:25,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-21 22:15:25,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2023-11-21 22:15:25,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 47 states have internal predecessors, (51), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:15:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 57 transitions. [2023-11-21 22:15:25,879 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 57 transitions. Word has length 39 [2023-11-21 22:15:25,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:15:25,879 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 57 transitions. [2023-11-21 22:15:25,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 30 states have internal predecessors, (53), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-21 22:15:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 57 transitions. [2023-11-21 22:15:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-21 22:15:25,881 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:15:25,881 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:15:25,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:15:26,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-21 22:15:26,104 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-11-21 22:15:26,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:15:26,105 INFO L85 PathProgramCache]: Analyzing trace with hash 736608870, now seen corresponding path program 1 times [2023-11-21 22:15:26,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:15:26,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387796068] [2023-11-21 22:15:26,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:26,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:15:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:28,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-21 22:15:28,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:28,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-21 22:15:28,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:29,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-21 22:15:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-21 22:15:30,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:15:30,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387796068] [2023-11-21 22:15:30,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387796068] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:30,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990506270] [2023-11-21 22:15:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:15:30,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:15:30,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:15:30,082 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:15:30,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e0177b7-7194-4111-ad93-3e3bb918b362/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:15:30,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:15:30,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 102 conjunts are in the unsatisfiable core [2023-11-21 22:15:30,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:15:30,628 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:15:30,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-21 22:15:30,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-21 22:15:31,067 INFO L349 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-11-21 22:15:31,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 19 [2023-11-21 22:15:31,077 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-21 22:15:31,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:15:31,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:31,504 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-21 22:15:31,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 43 [2023-11-21 22:15:31,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:31,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2023-11-21 22:15:31,566 INFO L349 Elim1Store]: treesize reduction 116, result has 32.2 percent of original size [2023-11-21 22:15:31,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 69 [2023-11-21 22:15:32,119 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:32,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:32,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 46 [2023-11-21 22:15:32,135 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:32,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:32,156 INFO L349 Elim1Store]: treesize reduction 57, result has 18.6 percent of original size [2023-11-21 22:15:32,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 56 [2023-11-21 22:15:32,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:32,397 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:32,401 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:32,427 INFO L349 Elim1Store]: treesize reduction 89, result has 12.7 percent of original size [2023-11-21 22:15:32,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 68 [2023-11-21 22:15:32,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:32,441 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:32,444 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:32,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 74 [2023-11-21 22:15:33,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:33,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:15:33,090 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:33,091 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:33,098 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-21 22:15:33,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 123 [2023-11-21 22:15:33,460 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-21 22:15:33,514 INFO L349 Elim1Store]: treesize reduction 170, result has 5.6 percent of original size [2023-11-21 22:15:33,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 132 treesize of output 63 [2023-11-21 22:15:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:15:33,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:15:38,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990506270] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:15:38,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:15:38,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23] total 51 [2023-11-21 22:15:38,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490585037] [2023-11-21 22:15:38,778 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:15:38,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-21 22:15:38,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:15:38,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-21 22:15:38,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3352, Unknown=1, NotChecked=0, Total=3540 [2023-11-21 22:15:38,781 INFO L87 Difference]: Start difference. First operand 52 states and 57 transitions. Second operand has 52 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6)