./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2c_append_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2c_append_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --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 9aabbeff87ba819b44dc608a3105d0ba81b71cd88693ecf2e6bf3860a7863e64 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 06:15:03,893 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 06:15:03,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 06:15:03,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 06:15:03,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 06:15:03,947 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 06:15:03,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 06:15:03,951 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 06:15:03,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 06:15:03,956 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 06:15:03,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 06:15:03,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 06:15:03,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 06:15:03,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 06:15:03,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 06:15:03,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 06:15:03,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 06:15:03,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 06:15:03,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 06:15:03,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 06:15:03,978 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 06:15:03,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 06:15:03,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 06:15:03,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 06:15:03,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 06:15:03,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 06:15:03,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 06:15:03,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 06:15:03,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 06:15:03,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 06:15:03,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 06:15:03,992 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 06:15:03,993 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 06:15:03,994 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 06:15:03,994 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 06:15:03,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 06:15:03,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 06:15:03,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 06:15:03,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 06:15:03,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 06:15:03,998 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 06:15:04,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 06:15:04,002 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 06:15:04,033 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 06:15:04,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 06:15:04,034 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 06:15:04,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 06:15:04,035 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 06:15:04,035 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 06:15:04,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 06:15:04,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 06:15:04,036 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 06:15:04,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 06:15:04,037 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 06:15:04,037 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 06:15:04,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 06:15:04,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 06:15:04,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 06:15:04,038 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 06:15:04,038 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 06:15:04,038 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 06:15:04,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 06:15:04,039 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 06:15:04,039 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 06:15:04,039 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 06:15:04,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 06:15:04,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 06:15:04,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 06:15:04,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:15:04,040 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 06:15:04,040 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 06:15:04,040 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 06:15:04,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 06:15:04,041 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aabbeff87ba819b44dc608a3105d0ba81b71cd88693ecf2e6bf3860a7863e64 [2022-07-20 06:15:04,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 06:15:04,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 06:15:04,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 06:15:04,346 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 06:15:04,347 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 06:15:04,348 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2022-07-20 06:15:04,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b376f50c5/99eae69e5c3648feb48cd73083ad8075/FLAG51a05deae [2022-07-20 06:15:04,800 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 06:15:04,801 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2022-07-20 06:15:04,815 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b376f50c5/99eae69e5c3648feb48cd73083ad8075/FLAG51a05deae [2022-07-20 06:15:05,187 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b376f50c5/99eae69e5c3648feb48cd73083ad8075 [2022-07-20 06:15:05,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 06:15:05,192 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 06:15:05,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 06:15:05,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 06:15:05,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 06:15:05,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:15:05" (1/1) ... [2022-07-20 06:15:05,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@231a6403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:05, skipping insertion in model container [2022-07-20 06:15:05,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:15:05" (1/1) ... [2022-07-20 06:15:05,214 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 06:15:05,262 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 06:15:05,556 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2022-07-20 06:15:05,561 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:15:05,572 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 06:15:05,628 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2022-07-20 06:15:05,629 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:15:05,658 INFO L208 MainTranslator]: Completed translation [2022-07-20 06:15:05,658 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:05 WrapperNode [2022-07-20 06:15:05,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 06:15:05,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 06:15:05,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 06:15:05,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 06:15:05,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:05" (1/1) ... [2022-07-20 06:15:05,687 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:05" (1/1) ... [2022-07-20 06:15:05,710 INFO L137 Inliner]: procedures = 127, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 152 [2022-07-20 06:15:05,714 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 06:15:05,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 06:15:05,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 06:15:05,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 06:15:05,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:05" (1/1) ... [2022-07-20 06:15:05,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:05" (1/1) ... [2022-07-20 06:15:05,743 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:05" (1/1) ... [2022-07-20 06:15:05,743 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:05" (1/1) ... [2022-07-20 06:15:05,752 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:05" (1/1) ... [2022-07-20 06:15:05,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:05" (1/1) ... [2022-07-20 06:15:05,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:05" (1/1) ... [2022-07-20 06:15:05,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 06:15:05,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 06:15:05,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 06:15:05,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 06:15:05,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:05" (1/1) ... [2022-07-20 06:15:05,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:15:05,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:15:05,824 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 06:15:05,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 06:15:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 06:15:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 06:15:05,863 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-20 06:15:05,863 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-20 06:15:05,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 06:15:05,863 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 06:15:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 06:15:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 06:15:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 06:15:05,864 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 06:15:05,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-20 06:15:05,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 06:15:05,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 06:15:05,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 06:15:05,960 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 06:15:05,962 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 06:15:06,335 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 06:15:06,341 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 06:15:06,342 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 06:15:06,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:15:06 BoogieIcfgContainer [2022-07-20 06:15:06,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 06:15:06,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 06:15:06,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 06:15:06,349 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 06:15:06,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:15:05" (1/3) ... [2022-07-20 06:15:06,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c77f7ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:15:06, skipping insertion in model container [2022-07-20 06:15:06,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:05" (2/3) ... [2022-07-20 06:15:06,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c77f7ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:15:06, skipping insertion in model container [2022-07-20 06:15:06,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:15:06" (3/3) ... [2022-07-20 06:15:06,352 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_append_unequal.i [2022-07-20 06:15:06,364 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 06:15:06,365 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2022-07-20 06:15:06,443 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 06:15:06,469 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=FINITE_AUTOMATA, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@39e8e42, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@464378ee [2022-07-20 06:15:06,470 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2022-07-20 06:15:06,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 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) [2022-07-20 06:15:06,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 06:15:06,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:06,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 06:15:06,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:06,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:06,487 INFO L85 PathProgramCache]: Analyzing trace with hash 895672562, now seen corresponding path program 1 times [2022-07-20 06:15:06,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:15:06,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286736927] [2022-07-20 06:15:06,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:06,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:15:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:15:06,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:15:06,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286736927] [2022-07-20 06:15:06,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286736927] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:15:06,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:15:06,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:15:06,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748738448] [2022-07-20 06:15:06,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:15:06,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:15:06,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:15:06,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:15:06,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:15:06,702 INFO L87 Difference]: Start difference. First operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 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) 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) [2022-07-20 06:15:06,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:06,854 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2022-07-20 06:15:06,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:15:06,857 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 [2022-07-20 06:15:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:06,867 INFO L225 Difference]: With dead ends: 135 [2022-07-20 06:15:06,868 INFO L226 Difference]: Without dead ends: 132 [2022-07-20 06:15:06,870 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 [2022-07-20 06:15:06,876 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:06,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 207 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:15:06,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-20 06:15:06,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-07-20 06:15:06,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 67 states have (on average 2.014925373134328) internal successors, (135), 127 states have internal predecessors, (135), 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) [2022-07-20 06:15:06,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2022-07-20 06:15:06,937 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 6 [2022-07-20 06:15:06,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:06,938 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2022-07-20 06:15:06,939 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) [2022-07-20 06:15:06,939 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2022-07-20 06:15:06,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 06:15:06,939 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:06,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 06:15:06,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 06:15:06,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:06,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:06,942 INFO L85 PathProgramCache]: Analyzing trace with hash 895672563, now seen corresponding path program 1 times [2022-07-20 06:15:06,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:15:06,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806082595] [2022-07-20 06:15:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:06,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:15:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:15:07,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:15:07,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806082595] [2022-07-20 06:15:07,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806082595] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:15:07,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:15:07,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:15:07,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833203500] [2022-07-20 06:15:07,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:15:07,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:15:07,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:15:07,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:15:07,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:15:07,020 INFO L87 Difference]: Start difference. First operand 132 states and 141 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) [2022-07-20 06:15:07,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:07,123 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2022-07-20 06:15:07,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:15:07,127 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 [2022-07-20 06:15:07,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:07,128 INFO L225 Difference]: With dead ends: 129 [2022-07-20 06:15:07,128 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 06:15:07,128 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 [2022-07-20 06:15:07,129 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 5 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:07,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 209 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:15:07,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 06:15:07,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-07-20 06:15:07,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 124 states have internal predecessors, (132), 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) [2022-07-20 06:15:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2022-07-20 06:15:07,136 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 6 [2022-07-20 06:15:07,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:07,137 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2022-07-20 06:15:07,137 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) [2022-07-20 06:15:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2022-07-20 06:15:07,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 06:15:07,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:07,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:07,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 06:15:07,138 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:07,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:07,139 INFO L85 PathProgramCache]: Analyzing trace with hash -753542016, now seen corresponding path program 1 times [2022-07-20 06:15:07,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:15:07,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578138043] [2022-07-20 06:15:07,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:07,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:15:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:07,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:15:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:15:07,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:15:07,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578138043] [2022-07-20 06:15:07,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578138043] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:15:07,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:15:07,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:15:07,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789692492] [2022-07-20 06:15:07,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:15:07,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:15:07,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:15:07,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:15:07,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:15:07,263 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-07-20 06:15:07,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:07,382 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2022-07-20 06:15:07,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:15:07,383 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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 14 [2022-07-20 06:15:07,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:07,385 INFO L225 Difference]: With dead ends: 140 [2022-07-20 06:15:07,385 INFO L226 Difference]: Without dead ends: 140 [2022-07-20 06:15:07,385 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:15:07,386 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 10 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:07,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 313 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:15:07,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-20 06:15:07,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2022-07-20 06:15:07,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 125 states have internal predecessors, (133), 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) [2022-07-20 06:15:07,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2022-07-20 06:15:07,396 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 14 [2022-07-20 06:15:07,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:07,397 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2022-07-20 06:15:07,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-07-20 06:15:07,397 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2022-07-20 06:15:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 06:15:07,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:07,398 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:07,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 06:15:07,399 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:07,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:07,399 INFO L85 PathProgramCache]: Analyzing trace with hash 265974304, now seen corresponding path program 1 times [2022-07-20 06:15:07,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:15:07,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363244394] [2022-07-20 06:15:07,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:07,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:15:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:07,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:15:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:07,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 06:15:07,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 06:15:07,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:15:07,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363244394] [2022-07-20 06:15:07,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363244394] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:15:07,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:15:07,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 06:15:07,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562842174] [2022-07-20 06:15:07,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:15:07,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:15:07,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:15:07,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:15:07,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:15:07,552 INFO L87 Difference]: Start difference. First operand 130 states and 139 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-07-20 06:15:07,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:07,800 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2022-07-20 06:15:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:15:07,800 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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 24 [2022-07-20 06:15:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:07,803 INFO L225 Difference]: With dead ends: 130 [2022-07-20 06:15:07,803 INFO L226 Difference]: Without dead ends: 130 [2022-07-20 06:15:07,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:15:07,805 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 21 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:07,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 426 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:15:07,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-20 06:15:07,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-07-20 06:15:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 68 states have (on average 1.9411764705882353) internal successors, (132), 124 states have internal predecessors, (132), 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) [2022-07-20 06:15:07,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2022-07-20 06:15:07,812 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 24 [2022-07-20 06:15:07,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:07,813 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2022-07-20 06:15:07,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 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) [2022-07-20 06:15:07,813 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2022-07-20 06:15:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 06:15:07,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:07,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:07,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 06:15:07,815 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:07,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:07,815 INFO L85 PathProgramCache]: Analyzing trace with hash 265974305, now seen corresponding path program 1 times [2022-07-20 06:15:07,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:15:07,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521367858] [2022-07-20 06:15:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:07,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:15:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:07,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:15:07,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:07,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 06:15:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:07,949 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:07,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:15:07,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521367858] [2022-07-20 06:15:07,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521367858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:15:07,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:15:07,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 06:15:07,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340852492] [2022-07-20 06:15:07,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:15:07,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:15:07,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:15:07,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:15:07,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:15:07,952 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-20 06:15:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:08,202 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2022-07-20 06:15:08,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:15:08,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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 24 [2022-07-20 06:15:08,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:08,205 INFO L225 Difference]: With dead ends: 129 [2022-07-20 06:15:08,205 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 06:15:08,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:15:08,206 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 19 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:08,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 450 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:15:08,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 06:15:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-07-20 06:15:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 123 states have internal predecessors, (131), 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) [2022-07-20 06:15:08,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2022-07-20 06:15:08,212 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 24 [2022-07-20 06:15:08,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:08,213 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2022-07-20 06:15:08,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-20 06:15:08,213 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2022-07-20 06:15:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 06:15:08,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:08,214 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:08,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 06:15:08,214 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:08,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:08,214 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731903, now seen corresponding path program 1 times [2022-07-20 06:15:08,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:15:08,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877055380] [2022-07-20 06:15:08,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:08,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:15:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:08,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:15:08,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:08,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 06:15:08,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:08,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:15:08,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877055380] [2022-07-20 06:15:08,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877055380] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:15:08,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978954190] [2022-07-20 06:15:08,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:08,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:15:08,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:15:08,427 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:15:08,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 06:15:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:08,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 06:15:08,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:08,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:08,730 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 06:15:08,731 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 21 [2022-07-20 06:15:08,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:15:08,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:15:08,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978954190] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:15:08,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:15:08,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2022-07-20 06:15:08,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784398099] [2022-07-20 06:15:08,819 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:15:08,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 06:15:08,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:15:08,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 06:15:08,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-07-20 06:15:08,820 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:15:09,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:09,197 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2022-07-20 06:15:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:15:09,198 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-07-20 06:15:09,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:09,199 INFO L225 Difference]: With dead ends: 153 [2022-07-20 06:15:09,199 INFO L226 Difference]: Without dead ends: 153 [2022-07-20 06:15:09,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-20 06:15:09,200 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 111 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:09,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 404 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 453 Invalid, 0 Unknown, 4 Unchecked, 0.3s Time] [2022-07-20 06:15:09,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-20 06:15:09,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 133. [2022-07-20 06:15:09,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 127 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:15:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2022-07-20 06:15:09,219 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 26 [2022-07-20 06:15:09,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:09,220 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2022-07-20 06:15:09,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:15:09,220 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2022-07-20 06:15:09,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 06:15:09,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:09,221 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:09,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:09,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-20 06:15:09,436 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:09,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:09,436 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731902, now seen corresponding path program 1 times [2022-07-20 06:15:09,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:15:09,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912290638] [2022-07-20 06:15:09,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:09,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:15:09,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:09,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:15:09,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:09,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 06:15:09,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:09,654 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:09,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:15:09,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912290638] [2022-07-20 06:15:09,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912290638] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:15:09,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858760347] [2022-07-20 06:15:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:09,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:15:09,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:15:09,660 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:15:09,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 06:15:09,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:09,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-20 06:15:09,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:09,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:10,079 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:15:10,079 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 [2022-07-20 06:15:10,094 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:15:10,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 06:15:10,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:15:10,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:15:10,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858760347] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:15:10,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:15:10,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2022-07-20 06:15:10,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40045205] [2022-07-20 06:15:10,277 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:15:10,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 06:15:10,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:15:10,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 06:15:10,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-07-20 06:15:10,279 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 06:15:10,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:10,878 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2022-07-20 06:15:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:15:10,879 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 26 [2022-07-20 06:15:10,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:10,880 INFO L225 Difference]: With dead ends: 135 [2022-07-20 06:15:10,880 INFO L226 Difference]: Without dead ends: 135 [2022-07-20 06:15:10,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-07-20 06:15:10,881 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 3 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:10,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 986 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 828 Invalid, 0 Unknown, 166 Unchecked, 0.4s Time] [2022-07-20 06:15:10,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-20 06:15:10,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-07-20 06:15:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.8888888888888888) internal successors, (136), 127 states have internal predecessors, (136), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:15:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2022-07-20 06:15:10,887 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 26 [2022-07-20 06:15:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:10,895 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2022-07-20 06:15:10,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 06:15:10,896 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2022-07-20 06:15:10,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 06:15:10,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:10,896 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:10,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:11,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-20 06:15:11,098 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:11,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:11,099 INFO L85 PathProgramCache]: Analyzing trace with hash -619542825, now seen corresponding path program 1 times [2022-07-20 06:15:11,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:15:11,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577956562] [2022-07-20 06:15:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:11,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:15:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:11,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:15:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:11,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 06:15:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:11,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:15:11,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577956562] [2022-07-20 06:15:11,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577956562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:15:11,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112947146] [2022-07-20 06:15:11,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:11,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:15:11,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:15:11,204 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:15:11,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 06:15:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:11,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 06:15:11,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:11,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:15:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:11,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112947146] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:15:11,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:15:11,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-07-20 06:15:11,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111800937] [2022-07-20 06:15:11,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:15:11,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:15:11,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:15:11,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:15:11,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:15:11,439 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:15:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:11,597 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2022-07-20 06:15:11,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:15:11,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-07-20 06:15:11,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:11,600 INFO L225 Difference]: With dead ends: 134 [2022-07-20 06:15:11,600 INFO L226 Difference]: Without dead ends: 134 [2022-07-20 06:15:11,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:15:11,602 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 4 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:11,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 660 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:15:11,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-20 06:15:11,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-07-20 06:15:11,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.875) internal successors, (135), 127 states have internal predecessors, (135), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:15:11,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2022-07-20 06:15:11,621 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 28 [2022-07-20 06:15:11,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:11,622 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2022-07-20 06:15:11,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-20 06:15:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2022-07-20 06:15:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 06:15:11,623 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:11,623 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:11,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:11,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:15:11,851 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:11,851 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739054, now seen corresponding path program 1 times [2022-07-20 06:15:11,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:15:11,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358909461] [2022-07-20 06:15:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:11,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:15:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:11,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:15:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:11,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 06:15:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:11,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 06:15:11,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:15:11,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358909461] [2022-07-20 06:15:11,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358909461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:15:11,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229363683] [2022-07-20 06:15:11,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:11,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:15:11,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:15:11,934 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:15:11,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 06:15:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:12,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 06:15:12,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:12,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 06:15:12,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:15:12,099 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 06:15:12,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 11 [2022-07-20 06:15:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 06:15:12,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229363683] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:15:12,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:15:12,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2022-07-20 06:15:12,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73697547] [2022-07-20 06:15:12,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:15:12,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:15:12,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:15:12,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:15:12,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:15:12,120 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:15:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:12,291 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2022-07-20 06:15:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:15:12,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-07-20 06:15:12,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:12,293 INFO L225 Difference]: With dead ends: 138 [2022-07-20 06:15:12,293 INFO L226 Difference]: Without dead ends: 138 [2022-07-20 06:15:12,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:15:12,294 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 13 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:12,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 311 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:15:12,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-20 06:15:12,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2022-07-20 06:15:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8666666666666667) internal successors, (140), 130 states have internal predecessors, (140), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:15:12,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2022-07-20 06:15:12,299 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 29 [2022-07-20 06:15:12,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:12,300 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2022-07-20 06:15:12,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:15:12,300 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2022-07-20 06:15:12,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 06:15:12,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:12,301 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:12,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-20 06:15:12,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:15:12,511 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:12,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:12,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739053, now seen corresponding path program 1 times [2022-07-20 06:15:12,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:15:12,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964779936] [2022-07-20 06:15:12,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:12,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:15:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:12,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:15:12,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:12,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 06:15:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:12,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:15:12,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964779936] [2022-07-20 06:15:12,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964779936] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:15:12,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262516535] [2022-07-20 06:15:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:12,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:15:12,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:15:12,697 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:15:12,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 06:15:12,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:12,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 06:15:12,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:12,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:15:12,968 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:15:12,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 24 [2022-07-20 06:15:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:13,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262516535] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:15:13,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 06:15:13,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2022-07-20 06:15:13,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943790970] [2022-07-20 06:15:13,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 06:15:13,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 06:15:13,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:15:13,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 06:15:13,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-07-20 06:15:13,065 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-20 06:15:13,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:13,365 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2022-07-20 06:15:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:15:13,365 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2022-07-20 06:15:13,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:13,366 INFO L225 Difference]: With dead ends: 143 [2022-07-20 06:15:13,366 INFO L226 Difference]: Without dead ends: 143 [2022-07-20 06:15:13,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-07-20 06:15:13,367 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 28 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:13,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1352 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:15:13,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-20 06:15:13,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2022-07-20 06:15:13,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 130 states have internal predecessors, (139), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:15:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2022-07-20 06:15:13,371 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 29 [2022-07-20 06:15:13,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:13,372 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2022-07-20 06:15:13,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-20 06:15:13,372 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2022-07-20 06:15:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 06:15:13,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:13,373 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:13,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:13,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 06:15:13,574 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:13,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:13,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598771, now seen corresponding path program 1 times [2022-07-20 06:15:13,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:15:13,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359112055] [2022-07-20 06:15:13,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:13,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:15:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:13,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:15:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:13,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 06:15:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 06:15:13,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:15:13,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359112055] [2022-07-20 06:15:13,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359112055] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:15:13,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:15:13,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 06:15:13,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501525427] [2022-07-20 06:15:13,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:15:13,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:15:13,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:15:13,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:15:13,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:15:13,662 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2022-07-20 06:15:13,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:13,930 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2022-07-20 06:15:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:15:13,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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 30 [2022-07-20 06:15:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:13,931 INFO L225 Difference]: With dead ends: 136 [2022-07-20 06:15:13,931 INFO L226 Difference]: Without dead ends: 136 [2022-07-20 06:15:13,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:15:13,932 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 23 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:13,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 475 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:15:13,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-20 06:15:13,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-07-20 06:15:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 75 states have (on average 1.84) internal successors, (138), 129 states have internal predecessors, (138), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:15:13,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2022-07-20 06:15:13,936 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 30 [2022-07-20 06:15:13,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:13,936 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2022-07-20 06:15:13,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 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) [2022-07-20 06:15:13,936 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2022-07-20 06:15:13,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 06:15:13,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:13,937 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:13,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 06:15:13,937 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:13,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598772, now seen corresponding path program 1 times [2022-07-20 06:15:13,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:15:13,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260734949] [2022-07-20 06:15:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:13,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:15:13,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:14,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:15:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:14,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 06:15:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:14,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:15:14,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260734949] [2022-07-20 06:15:14,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260734949] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:15:14,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:15:14,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 06:15:14,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654541879] [2022-07-20 06:15:14,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:15:14,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 06:15:14,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:15:14,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 06:15:14,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-20 06:15:14,061 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-07-20 06:15:14,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:14,330 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2022-07-20 06:15:14,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:15:14,330 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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 30 [2022-07-20 06:15:14,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:14,331 INFO L225 Difference]: With dead ends: 134 [2022-07-20 06:15:14,331 INFO L226 Difference]: Without dead ends: 134 [2022-07-20 06:15:14,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:15:14,332 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 20 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:14,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 505 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:15:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-20 06:15:14,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-07-20 06:15:14,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 75 states have (on average 1.8266666666666667) internal successors, (137), 128 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:15:14,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2022-07-20 06:15:14,336 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 30 [2022-07-20 06:15:14,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:14,337 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2022-07-20 06:15:14,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-07-20 06:15:14,337 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2022-07-20 06:15:14,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 06:15:14,338 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:14,338 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:14,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 06:15:14,338 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:14,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:14,339 INFO L85 PathProgramCache]: Analyzing trace with hash 939320083, now seen corresponding path program 1 times [2022-07-20 06:15:14,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:15:14,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015376995] [2022-07-20 06:15:14,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:14,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:15:14,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:14,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:15:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:14,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 06:15:14,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:14,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-20 06:15:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 06:15:14,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:15:14,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015376995] [2022-07-20 06:15:14,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015376995] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:15:14,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168101033] [2022-07-20 06:15:14,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:14,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:15:14,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:15:14,433 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:15:14,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 06:15:14,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:14,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 06:15:14,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 06:15:14,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:15:14,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168101033] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:15:14,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 06:15:14,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-07-20 06:15:14,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482790747] [2022-07-20 06:15:14,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:15:14,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:15:14,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 06:15:14,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:15:14,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:15:14,652 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:15:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:14,663 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-07-20 06:15:14,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:15:14,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2022-07-20 06:15:14,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:14,664 INFO L225 Difference]: With dead ends: 122 [2022-07-20 06:15:14,664 INFO L226 Difference]: Without dead ends: 122 [2022-07-20 06:15:14,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:15:14,666 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 107 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:14,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 153 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:15:14,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-20 06:15:14,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-07-20 06:15:14,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.8088235294117647) internal successors, (123), 117 states have internal predecessors, (123), 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) [2022-07-20 06:15:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2022-07-20 06:15:14,670 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 41 [2022-07-20 06:15:14,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:14,671 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2022-07-20 06:15:14,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:15:14,671 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2022-07-20 06:15:14,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 06:15:14,672 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:14,672 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:14,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:14,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:15:14,888 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:14,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:14,888 INFO L85 PathProgramCache]: Analyzing trace with hash -566913869, now seen corresponding path program 1 times [2022-07-20 06:15:14,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 06:15:14,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072456770] [2022-07-20 06:15:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:14,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 06:15:14,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:15,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-20 06:15:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:15,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-20 06:15:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:15,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-20 06:15:15,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:15,128 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-20 06:15:15,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 06:15:15,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072456770] [2022-07-20 06:15:15,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072456770] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:15:15,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363137934] [2022-07-20 06:15:15,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:15,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:15:15,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:15:15,131 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 06:15:15,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 06:15:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:15,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 06:15:15,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:15,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:15,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:15:15,453 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-20 06:15:15,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:15,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 06:15:15,654 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: line 91447 column 46: unknown constant v_#valid_BEFORE_CALL_6 at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:239) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:258) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript$DiffTransformer.checkOrAddAxiom(DiffWrapperScript.java:161) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript$DiffTransformer.convertApplicationTerm(DiffWrapperScript.java:171) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:352) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:285) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:109) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertTerm(ManagedScript.java:134) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:824) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:768) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:345) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:305) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:582) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-20 06:15:15,657 INFO L158 Benchmark]: Toolchain (without parser) took 10465.36ms. Allocated memory was 100.7MB in the beginning and 148.9MB in the end (delta: 48.2MB). Free memory was 62.7MB in the beginning and 57.0MB in the end (delta: 5.7MB). Peak memory consumption was 55.8MB. Max. memory is 16.1GB. [2022-07-20 06:15:15,658 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 100.7MB. Free memory was 80.2MB in the beginning and 80.1MB in the end (delta: 73.7kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-20 06:15:15,658 INFO L158 Benchmark]: CACSL2BoogieTranslator took 463.44ms. Allocated memory is still 100.7MB. Free memory was 62.4MB in the beginning and 73.3MB in the end (delta: -10.8MB). Peak memory consumption was 17.7MB. Max. memory is 16.1GB. [2022-07-20 06:15:15,658 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.83ms. Allocated memory is still 100.7MB. Free memory was 73.3MB in the beginning and 71.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-20 06:15:15,658 INFO L158 Benchmark]: Boogie Preprocessor took 68.83ms. Allocated memory is still 100.7MB. Free memory was 71.0MB in the beginning and 69.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-20 06:15:15,658 INFO L158 Benchmark]: RCFGBuilder took 558.90ms. Allocated memory is still 100.7MB. Free memory was 69.0MB in the beginning and 47.0MB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-07-20 06:15:15,659 INFO L158 Benchmark]: TraceAbstraction took 9311.53ms. Allocated memory was 100.7MB in the beginning and 148.9MB in the end (delta: 48.2MB). Free memory was 46.3MB in the beginning and 57.0MB in the end (delta: -10.6MB). Peak memory consumption was 38.2MB. Max. memory is 16.1GB. [2022-07-20 06:15:15,660 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 100.7MB. Free memory was 80.2MB in the beginning and 80.1MB in the end (delta: 73.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 463.44ms. Allocated memory is still 100.7MB. Free memory was 62.4MB in the beginning and 73.3MB in the end (delta: -10.8MB). Peak memory consumption was 17.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.83ms. Allocated memory is still 100.7MB. Free memory was 73.3MB in the beginning and 71.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 68.83ms. Allocated memory is still 100.7MB. Free memory was 71.0MB in the beginning and 69.0MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 558.90ms. Allocated memory is still 100.7MB. Free memory was 69.0MB in the beginning and 47.0MB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 9311.53ms. Allocated memory was 100.7MB in the beginning and 148.9MB in the end (delta: 48.2MB). Free memory was 46.3MB in the beginning and 57.0MB in the end (delta: -10.6MB). Peak memory consumption was 38.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: line 91447 column 46: unknown constant v_#valid_BEFORE_CALL_6 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: line 91447 column 46: unknown constant v_#valid_BEFORE_CALL_6: de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1458) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-20 06:15:15,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 1 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/dll2c_append_unequal.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --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 9aabbeff87ba819b44dc608a3105d0ba81b71cd88693ecf2e6bf3860a7863e64 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 06:15:17,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 06:15:17,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 06:15:17,759 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 06:15:17,760 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 06:15:17,761 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 06:15:17,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 06:15:17,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 06:15:17,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 06:15:17,775 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 06:15:17,776 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 06:15:17,780 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 06:15:17,781 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 06:15:17,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 06:15:17,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 06:15:17,787 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 06:15:17,788 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 06:15:17,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 06:15:17,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 06:15:17,799 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 06:15:17,800 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 06:15:17,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 06:15:17,803 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 06:15:17,804 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 06:15:17,806 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 06:15:17,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 06:15:17,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 06:15:17,814 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 06:15:17,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 06:15:17,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 06:15:17,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 06:15:17,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 06:15:17,818 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 06:15:17,819 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 06:15:17,820 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 06:15:17,821 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 06:15:17,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 06:15:17,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 06:15:17,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 06:15:17,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 06:15:17,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 06:15:17,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 06:15:17,830 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-07-20 06:15:17,864 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 06:15:17,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 06:15:17,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 06:15:17,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 06:15:17,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 06:15:17,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 06:15:17,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 06:15:17,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 06:15:17,868 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 06:15:17,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 06:15:17,869 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 06:15:17,869 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 06:15:17,869 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 06:15:17,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 06:15:17,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 06:15:17,875 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 06:15:17,875 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 06:15:17,875 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 06:15:17,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 06:15:17,875 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 06:15:17,876 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-20 06:15:17,876 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-20 06:15:17,876 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 06:15:17,876 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 06:15:17,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 06:15:17,877 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 06:15:17,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 06:15:17,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:15:17,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 06:15:17,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 06:15:17,878 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-20 06:15:17,878 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-20 06:15:17,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-20 06:15:17,878 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9aabbeff87ba819b44dc608a3105d0ba81b71cd88693ecf2e6bf3860a7863e64 [2022-07-20 06:15:18,192 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 06:15:18,220 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 06:15:18,222 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 06:15:18,223 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 06:15:18,223 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 06:15:18,224 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2022-07-20 06:15:18,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e63c0802/21b8a3acbd764d02a9805e2232a8c727/FLAGb43403a35 [2022-07-20 06:15:18,763 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 06:15:18,766 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2022-07-20 06:15:18,784 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e63c0802/21b8a3acbd764d02a9805e2232a8c727/FLAGb43403a35 [2022-07-20 06:15:19,103 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e63c0802/21b8a3acbd764d02a9805e2232a8c727 [2022-07-20 06:15:19,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 06:15:19,107 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 06:15:19,110 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 06:15:19,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 06:15:19,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 06:15:19,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:15:19" (1/1) ... [2022-07-20 06:15:19,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@482a0398 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:19, skipping insertion in model container [2022-07-20 06:15:19,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 06:15:19" (1/1) ... [2022-07-20 06:15:19,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 06:15:19,160 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 06:15:19,395 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2022-07-20 06:15:19,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:15:19,410 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 06:15:19,456 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2022-07-20 06:15:19,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 06:15:19,484 INFO L208 MainTranslator]: Completed translation [2022-07-20 06:15:19,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:19 WrapperNode [2022-07-20 06:15:19,487 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 06:15:19,488 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 06:15:19,488 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 06:15:19,489 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 06:15:19,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:19" (1/1) ... [2022-07-20 06:15:19,511 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:19" (1/1) ... [2022-07-20 06:15:19,547 INFO L137 Inliner]: procedures = 130, calls = 49, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 153 [2022-07-20 06:15:19,552 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 06:15:19,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 06:15:19,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 06:15:19,553 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 06:15:19,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:19" (1/1) ... [2022-07-20 06:15:19,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:19" (1/1) ... [2022-07-20 06:15:19,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:19" (1/1) ... [2022-07-20 06:15:19,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:19" (1/1) ... [2022-07-20 06:15:19,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:19" (1/1) ... [2022-07-20 06:15:19,596 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:19" (1/1) ... [2022-07-20 06:15:19,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:19" (1/1) ... [2022-07-20 06:15:19,610 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 06:15:19,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 06:15:19,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 06:15:19,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 06:15:19,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:19" (1/1) ... [2022-07-20 06:15:19,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 06:15:19,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 06:15:19,643 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 06:15:19,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 06:15:19,677 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-20 06:15:19,677 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2022-07-20 06:15:19,678 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2022-07-20 06:15:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 06:15:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 06:15:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 06:15:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 06:15:19,678 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 06:15:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 06:15:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-20 06:15:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-20 06:15:19,679 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-20 06:15:19,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 06:15:19,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 06:15:19,783 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 06:15:19,785 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 06:15:20,301 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 06:15:20,307 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 06:15:20,308 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 06:15:20,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:15:20 BoogieIcfgContainer [2022-07-20 06:15:20,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 06:15:20,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 06:15:20,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 06:15:20,316 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 06:15:20,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 06:15:19" (1/3) ... [2022-07-20 06:15:20,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca231be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:15:20, skipping insertion in model container [2022-07-20 06:15:20,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 06:15:19" (2/3) ... [2022-07-20 06:15:20,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ca231be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 06:15:20, skipping insertion in model container [2022-07-20 06:15:20,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 06:15:20" (3/3) ... [2022-07-20 06:15:20,320 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2c_append_unequal.i [2022-07-20 06:15:20,337 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 06:15:20,338 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 64 error locations. [2022-07-20 06:15:20,396 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 06:15:20,409 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=FINITE_AUTOMATA, 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6fee2d64, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@771eb8a4 [2022-07-20 06:15:20,409 INFO L358 AbstractCegarLoop]: Starting to check reachability of 64 error locations. [2022-07-20 06:15:20,421 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 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) [2022-07-20 06:15:20,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 06:15:20,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:20,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 06:15:20,429 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:20,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:20,435 INFO L85 PathProgramCache]: Analyzing trace with hash 895672562, now seen corresponding path program 1 times [2022-07-20 06:15:20,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:15:20,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361051004] [2022-07-20 06:15:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:20,446 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:15:20,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:15:20,451 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:15:20,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-20 06:15:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:20,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 06:15:20,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:20,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:15:20,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:15:20,636 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:15:20,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361051004] [2022-07-20 06:15:20,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361051004] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:15:20,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:15:20,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:15:20,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140922326] [2022-07-20 06:15:20,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:15:20,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:15:20,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:15:20,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:15:20,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:15:20,683 INFO L87 Difference]: Start difference. First operand has 138 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 133 states have internal predecessors, (146), 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) 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) [2022-07-20 06:15:20,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:20,948 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2022-07-20 06:15:20,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:15:20,951 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 [2022-07-20 06:15:20,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:20,960 INFO L225 Difference]: With dead ends: 135 [2022-07-20 06:15:20,960 INFO L226 Difference]: Without dead ends: 132 [2022-07-20 06:15:20,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:15:20,966 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:20,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 207 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:15:20,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-20 06:15:21,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-07-20 06:15:21,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 67 states have (on average 2.014925373134328) internal successors, (135), 127 states have internal predecessors, (135), 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) [2022-07-20 06:15:21,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 141 transitions. [2022-07-20 06:15:21,010 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 141 transitions. Word has length 6 [2022-07-20 06:15:21,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:21,011 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 141 transitions. [2022-07-20 06:15:21,011 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) [2022-07-20 06:15:21,011 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 141 transitions. [2022-07-20 06:15:21,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 06:15:21,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:21,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 06:15:21,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2022-07-20 06:15:21,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:15:21,221 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:21,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:21,222 INFO L85 PathProgramCache]: Analyzing trace with hash 895672563, now seen corresponding path program 1 times [2022-07-20 06:15:21,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:15:21,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1112318152] [2022-07-20 06:15:21,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:21,225 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:15:21,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:15:21,227 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:15:21,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-20 06:15:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:21,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 06:15:21,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:21,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:15:21,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:15:21,354 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:15:21,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1112318152] [2022-07-20 06:15:21,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1112318152] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:15:21,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:15:21,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:15:21,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968900223] [2022-07-20 06:15:21,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:15:21,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:15:21,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:15:21,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:15:21,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:15:21,362 INFO L87 Difference]: Start difference. First operand 132 states and 141 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) [2022-07-20 06:15:21,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:21,597 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2022-07-20 06:15:21,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:15:21,598 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 [2022-07-20 06:15:21,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:21,600 INFO L225 Difference]: With dead ends: 129 [2022-07-20 06:15:21,600 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 06:15:21,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:15:21,601 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 5 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:21,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 209 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:15:21,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 06:15:21,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-07-20 06:15:21,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 67 states have (on average 1.9701492537313432) internal successors, (132), 124 states have internal predecessors, (132), 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) [2022-07-20 06:15:21,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2022-07-20 06:15:21,610 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 6 [2022-07-20 06:15:21,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:21,611 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2022-07-20 06:15:21,611 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) [2022-07-20 06:15:21,611 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2022-07-20 06:15:21,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 06:15:21,612 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:21,612 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:21,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:21,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:15:21,822 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:21,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:21,822 INFO L85 PathProgramCache]: Analyzing trace with hash -753542016, now seen corresponding path program 1 times [2022-07-20 06:15:21,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:15:21,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [72976116] [2022-07-20 06:15:21,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:21,823 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:15:21,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:15:21,825 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:15:21,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-20 06:15:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:21,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 06:15:21,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:21,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:15:21,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:15:21,936 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:15:21,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [72976116] [2022-07-20 06:15:21,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [72976116] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:15:21,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:15:21,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:15:21,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405884097] [2022-07-20 06:15:21,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:15:21,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:15:21,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:15:21,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:15:21,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:15:21,939 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-07-20 06:15:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:21,951 INFO L93 Difference]: Finished difference Result 140 states and 151 transitions. [2022-07-20 06:15:21,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:15:21,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 14 [2022-07-20 06:15:21,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:21,953 INFO L225 Difference]: With dead ends: 140 [2022-07-20 06:15:21,953 INFO L226 Difference]: Without dead ends: 140 [2022-07-20 06:15:21,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:15:21,954 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 10 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:21,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 269 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:15:21,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-20 06:15:21,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2022-07-20 06:15:21,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 125 states have internal predecessors, (133), 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) [2022-07-20 06:15:21,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 139 transitions. [2022-07-20 06:15:21,966 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 139 transitions. Word has length 14 [2022-07-20 06:15:21,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:21,966 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 139 transitions. [2022-07-20 06:15:21,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2022-07-20 06:15:21,967 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 139 transitions. [2022-07-20 06:15:21,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 06:15:21,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:21,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:21,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:22,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:15:22,178 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:22,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:22,178 INFO L85 PathProgramCache]: Analyzing trace with hash 265974304, now seen corresponding path program 1 times [2022-07-20 06:15:22,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:15:22,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1371214856] [2022-07-20 06:15:22,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:22,179 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:15:22,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:15:22,180 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:15:22,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-20 06:15:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:22,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 06:15:22,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:22,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:22,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:22,335 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:15:22,335 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:15:22,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1371214856] [2022-07-20 06:15:22,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1371214856] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:15:22,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:15:22,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:15:22,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36964431] [2022-07-20 06:15:22,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:15:22,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:15:22,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:15:22,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:15:22,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:15:22,338 INFO L87 Difference]: Start difference. First operand 130 states and 139 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-20 06:15:22,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:22,857 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2022-07-20 06:15:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 06:15:22,858 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 24 [2022-07-20 06:15:22,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:22,860 INFO L225 Difference]: With dead ends: 130 [2022-07-20 06:15:22,860 INFO L226 Difference]: Without dead ends: 130 [2022-07-20 06:15:22,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:15:22,861 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 20 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:22,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 386 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 06:15:22,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-20 06:15:22,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-07-20 06:15:22,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 68 states have (on average 1.9411764705882353) internal successors, (132), 124 states have internal predecessors, (132), 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) [2022-07-20 06:15:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 138 transitions. [2022-07-20 06:15:22,876 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 138 transitions. Word has length 24 [2022-07-20 06:15:22,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:22,877 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 138 transitions. [2022-07-20 06:15:22,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-20 06:15:22,877 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 138 transitions. [2022-07-20 06:15:22,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 06:15:22,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:22,878 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:22,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:23,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:15:23,089 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:23,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:23,089 INFO L85 PathProgramCache]: Analyzing trace with hash 265974305, now seen corresponding path program 1 times [2022-07-20 06:15:23,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:15:23,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1275869585] [2022-07-20 06:15:23,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:23,090 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:15:23,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:15:23,093 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:15:23,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-20 06:15:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:23,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 06:15:23,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:23,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:23,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:15:23,328 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:15:23,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1275869585] [2022-07-20 06:15:23,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1275869585] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:15:23,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:15:23,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:15:23,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511507478] [2022-07-20 06:15:23,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:15:23,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:15:23,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:15:23,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:15:23,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:15:23,331 INFO L87 Difference]: Start difference. First operand 129 states and 138 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-20 06:15:23,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:23,868 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2022-07-20 06:15:23,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 06:15:23,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 24 [2022-07-20 06:15:23,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:23,869 INFO L225 Difference]: With dead ends: 129 [2022-07-20 06:15:23,869 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 06:15:23,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:15:23,870 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 19 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:23,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 410 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 06:15:23,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 06:15:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-07-20 06:15:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 68 states have (on average 1.9264705882352942) internal successors, (131), 123 states have internal predecessors, (131), 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) [2022-07-20 06:15:23,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2022-07-20 06:15:23,877 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 24 [2022-07-20 06:15:23,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:23,877 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2022-07-20 06:15:23,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-07-20 06:15:23,878 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2022-07-20 06:15:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 06:15:23,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:23,878 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:23,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:24,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:15:24,089 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:24,089 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731903, now seen corresponding path program 1 times [2022-07-20 06:15:24,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:15:24,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342270414] [2022-07-20 06:15:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:24,090 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:15:24,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:15:24,091 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:15:24,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-20 06:15:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:24,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 06:15:24,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:24,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:24,404 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 06:15:24,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 25 [2022-07-20 06:15:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:15:24,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:15:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:15:24,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:15:24,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342270414] [2022-07-20 06:15:24,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342270414] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:15:24,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:15:24,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2022-07-20 06:15:24,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761853691] [2022-07-20 06:15:24,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:15:24,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 06:15:24,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:15:24,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 06:15:24,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:15:24,648 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:15:25,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:25,101 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2022-07-20 06:15:25,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:15:25,102 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-07-20 06:15:25,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:25,103 INFO L225 Difference]: With dead ends: 135 [2022-07-20 06:15:25,103 INFO L226 Difference]: Without dead ends: 135 [2022-07-20 06:15:25,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-20 06:15:25,104 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 5 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:25,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 496 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 328 Invalid, 0 Unknown, 86 Unchecked, 0.4s Time] [2022-07-20 06:15:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-20 06:15:25,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-07-20 06:15:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.9027777777777777) internal successors, (137), 127 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:15:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 145 transitions. [2022-07-20 06:15:25,110 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 145 transitions. Word has length 26 [2022-07-20 06:15:25,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:25,111 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 145 transitions. [2022-07-20 06:15:25,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:15:25,111 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 145 transitions. [2022-07-20 06:15:25,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 06:15:25,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:25,112 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:25,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-07-20 06:15:25,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:15:25,327 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:25,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:25,328 INFO L85 PathProgramCache]: Analyzing trace with hash -2096731902, now seen corresponding path program 1 times [2022-07-20 06:15:25,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:15:25,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [53959] [2022-07-20 06:15:25,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:25,328 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:15:25,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:15:25,329 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:15:25,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-20 06:15:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:25,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 06:15:25,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:25,487 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:25,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:25,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:15:25,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-07-20 06:15:25,713 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:15:25,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 12 [2022-07-20 06:15:25,751 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:15:25,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:15:28,025 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:15:28,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [53959] [2022-07-20 06:15:28,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [53959] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:15:28,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1955999308] [2022-07-20 06:15:28,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:28,026 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 06:15:28,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 06:15:28,030 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 06:15:28,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2022-07-20 06:15:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:28,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 06:15:28,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:28,343 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:28,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:28,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:15:28,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-07-20 06:15:28,602 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:15:28,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 12 [2022-07-20 06:15:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:15:28,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:15:30,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1955999308] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:15:30,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:15:30,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-07-20 06:15:30,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498511465] [2022-07-20 06:15:30,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:15:30,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 06:15:30,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:15:30,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 06:15:30,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=86, Unknown=1, NotChecked=0, Total=110 [2022-07-20 06:15:30,930 INFO L87 Difference]: Start difference. First operand 133 states and 145 transitions. Second operand has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-07-20 06:15:31,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:31,998 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2022-07-20 06:15:31,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 06:15:31,998 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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 26 [2022-07-20 06:15:31,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:31,999 INFO L225 Difference]: With dead ends: 135 [2022-07-20 06:15:31,999 INFO L226 Difference]: Without dead ends: 135 [2022-07-20 06:15:32,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=31, Invalid=124, Unknown=1, NotChecked=0, Total=156 [2022-07-20 06:15:32,000 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 3 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:32,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 436 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 411 Invalid, 0 Unknown, 83 Unchecked, 1.0s Time] [2022-07-20 06:15:32,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-20 06:15:32,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2022-07-20 06:15:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.8888888888888888) internal successors, (136), 127 states have internal predecessors, (136), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:15:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 144 transitions. [2022-07-20 06:15:32,006 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 144 transitions. Word has length 26 [2022-07-20 06:15:32,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:32,006 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 144 transitions. [2022-07-20 06:15:32,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 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) [2022-07-20 06:15:32,006 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 144 transitions. [2022-07-20 06:15:32,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 06:15:32,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:32,007 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:32,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:32,221 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2022-07-20 06:15:32,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:15:32,411 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:32,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:32,412 INFO L85 PathProgramCache]: Analyzing trace with hash -619542825, now seen corresponding path program 1 times [2022-07-20 06:15:32,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:15:32,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1424443177] [2022-07-20 06:15:32,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:32,413 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:15:32,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:15:32,414 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:15:32,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-20 06:15:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:32,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 06:15:32,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:32,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:15:32,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:32,641 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:15:32,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1424443177] [2022-07-20 06:15:32,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1424443177] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:15:32,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:15:32,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2022-07-20 06:15:32,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477989578] [2022-07-20 06:15:32,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:15:32,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:15:32,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:15:32,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:15:32,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:15:32,648 INFO L87 Difference]: Start difference. First operand 133 states and 144 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-07-20 06:15:32,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:32,805 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2022-07-20 06:15:32,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 06:15:32,806 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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 28 [2022-07-20 06:15:32,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:32,807 INFO L225 Difference]: With dead ends: 134 [2022-07-20 06:15:32,807 INFO L226 Difference]: Without dead ends: 134 [2022-07-20 06:15:32,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:15:32,808 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 4 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:32,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 620 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 06:15:32,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-20 06:15:32,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-07-20 06:15:32,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 72 states have (on average 1.875) internal successors, (135), 127 states have internal predecessors, (135), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:15:32,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2022-07-20 06:15:32,813 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 28 [2022-07-20 06:15:32,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:32,813 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2022-07-20 06:15:32,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 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) [2022-07-20 06:15:32,814 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2022-07-20 06:15:32,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 06:15:32,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:32,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:32,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-07-20 06:15:33,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:15:33,024 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:33,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:33,025 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739054, now seen corresponding path program 1 times [2022-07-20 06:15:33,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:15:33,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [823761075] [2022-07-20 06:15:33,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:33,025 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:15:33,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:15:33,026 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:15:33,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-20 06:15:33,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:33,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 06:15:33,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 06:15:33,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:15:33,203 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 06:15:33,203 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 11 [2022-07-20 06:15:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 06:15:33,233 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:15:33,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [823761075] [2022-07-20 06:15:33,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [823761075] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:15:33,233 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:15:33,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2022-07-20 06:15:33,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684442021] [2022-07-20 06:15:33,233 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:15:33,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:15:33,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:15:33,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:15:33,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:15:33,234 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-20 06:15:33,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:33,475 INFO L93 Difference]: Finished difference Result 138 states and 150 transitions. [2022-07-20 06:15:33,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:15:33,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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 29 [2022-07-20 06:15:33,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:33,476 INFO L225 Difference]: With dead ends: 138 [2022-07-20 06:15:33,477 INFO L226 Difference]: Without dead ends: 138 [2022-07-20 06:15:33,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:15:33,477 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 9 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:33,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 320 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:15:33,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-20 06:15:33,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2022-07-20 06:15:33,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8666666666666667) internal successors, (140), 130 states have internal predecessors, (140), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:15:33,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2022-07-20 06:15:33,484 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 29 [2022-07-20 06:15:33,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:33,484 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2022-07-20 06:15:33,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.0) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-20 06:15:33,484 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2022-07-20 06:15:33,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-20 06:15:33,485 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:33,485 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:33,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:33,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:15:33,700 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:33,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2030739053, now seen corresponding path program 1 times [2022-07-20 06:15:33,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:15:33,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433915944] [2022-07-20 06:15:33,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:33,701 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:15:33,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:15:33,702 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:15:33,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-20 06:15:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:33,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 06:15:33,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:33,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:33,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:15:34,053 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:15:34,053 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 26 [2022-07-20 06:15:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:34,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:15:34,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433915944] [2022-07-20 06:15:34,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433915944] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:15:34,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:15:34,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2022-07-20 06:15:34,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696412020] [2022-07-20 06:15:34,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:15:34,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 06:15:34,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:15:34,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 06:15:34,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-07-20 06:15:34,539 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 06:15:35,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:35,332 INFO L93 Difference]: Finished difference Result 143 states and 156 transitions. [2022-07-20 06:15:35,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 06:15:35,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-07-20 06:15:35,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:35,334 INFO L225 Difference]: With dead ends: 143 [2022-07-20 06:15:35,334 INFO L226 Difference]: Without dead ends: 143 [2022-07-20 06:15:35,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-20 06:15:35,335 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 24 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:35,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 931 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 06:15:35,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-20 06:15:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 136. [2022-07-20 06:15:35,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 75 states have (on average 1.8533333333333333) internal successors, (139), 130 states have internal predecessors, (139), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:15:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 147 transitions. [2022-07-20 06:15:35,340 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 147 transitions. Word has length 29 [2022-07-20 06:15:35,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:35,340 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 147 transitions. [2022-07-20 06:15:35,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-20 06:15:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 147 transitions. [2022-07-20 06:15:35,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 06:15:35,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:35,343 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:35,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:35,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:15:35,544 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:35,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:35,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598771, now seen corresponding path program 1 times [2022-07-20 06:15:35,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:15:35,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830666771] [2022-07-20 06:15:35,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:35,545 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:15:35,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:15:35,546 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:15:35,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-20 06:15:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:35,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 06:15:35,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:35,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:35,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:15:35,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:15:35,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830666771] [2022-07-20 06:15:35,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830666771] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:15:35,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:15:35,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 06:15:35,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141457926] [2022-07-20 06:15:35,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:15:35,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:15:35,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:15:35,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:15:35,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:15:35,735 INFO L87 Difference]: Start difference. First operand 136 states and 147 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-07-20 06:15:36,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:36,387 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2022-07-20 06:15:36,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:15:36,388 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 30 [2022-07-20 06:15:36,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:36,389 INFO L225 Difference]: With dead ends: 136 [2022-07-20 06:15:36,389 INFO L226 Difference]: Without dead ends: 136 [2022-07-20 06:15:36,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:15:36,390 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 22 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:36,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 436 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 06:15:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-20 06:15:36,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-07-20 06:15:36,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 75 states have (on average 1.84) internal successors, (138), 129 states have internal predecessors, (138), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:15:36,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 146 transitions. [2022-07-20 06:15:36,394 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 146 transitions. Word has length 30 [2022-07-20 06:15:36,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:36,394 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 146 transitions. [2022-07-20 06:15:36,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-07-20 06:15:36,394 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 146 transitions. [2022-07-20 06:15:36,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-20 06:15:36,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:36,395 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:36,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:36,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:15:36,605 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:36,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1471598772, now seen corresponding path program 1 times [2022-07-20 06:15:36,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:15:36,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [65610790] [2022-07-20 06:15:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:36,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:15:36,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:15:36,608 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:15:36,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-20 06:15:36,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:36,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 06:15:36,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:36,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:36,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:36,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:15:36,909 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:15:36,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [65610790] [2022-07-20 06:15:36,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [65610790] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:15:36,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:15:36,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-20 06:15:36,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398334205] [2022-07-20 06:15:36,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:15:36,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 06:15:36,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:15:36,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 06:15:36,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:15:36,911 INFO L87 Difference]: Start difference. First operand 135 states and 146 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-07-20 06:15:37,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:37,626 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2022-07-20 06:15:37,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 06:15:37,626 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 30 [2022-07-20 06:15:37,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:37,628 INFO L225 Difference]: With dead ends: 134 [2022-07-20 06:15:37,628 INFO L226 Difference]: Without dead ends: 134 [2022-07-20 06:15:37,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-20 06:15:37,629 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 20 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:37,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 466 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 06:15:37,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-20 06:15:37,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-07-20 06:15:37,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 75 states have (on average 1.8266666666666667) internal successors, (137), 128 states have internal predecessors, (137), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-20 06:15:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2022-07-20 06:15:37,633 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 30 [2022-07-20 06:15:37,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:37,633 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2022-07-20 06:15:37,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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) [2022-07-20 06:15:37,633 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2022-07-20 06:15:37,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-20 06:15:37,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:37,634 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:37,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:37,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:15:37,844 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:37,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:37,844 INFO L85 PathProgramCache]: Analyzing trace with hash 939320083, now seen corresponding path program 1 times [2022-07-20 06:15:37,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:15:37,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377362325] [2022-07-20 06:15:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:37,845 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:15:37,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:15:37,846 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:15:37,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-20 06:15:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:37,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 06:15:37,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:38,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 06:15:38,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:15:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-20 06:15:38,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:15:38,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377362325] [2022-07-20 06:15:38,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377362325] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 06:15:38,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:15:38,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-07-20 06:15:38,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195920594] [2022-07-20 06:15:38,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:15:38,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:15:38,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:15:38,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:15:38,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:15:38,095 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 06:15:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:38,118 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2022-07-20 06:15:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 06:15:38,119 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2022-07-20 06:15:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:38,120 INFO L225 Difference]: With dead ends: 122 [2022-07-20 06:15:38,120 INFO L226 Difference]: Without dead ends: 122 [2022-07-20 06:15:38,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:15:38,121 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 321 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:38,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 259 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 06:15:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-20 06:15:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-07-20 06:15:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 68 states have (on average 1.8088235294117647) internal successors, (123), 117 states have internal predecessors, (123), 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) [2022-07-20 06:15:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2022-07-20 06:15:38,124 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 41 [2022-07-20 06:15:38,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:38,125 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2022-07-20 06:15:38,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 06:15:38,125 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2022-07-20 06:15:38,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 06:15:38,126 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:38,126 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:38,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:38,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:15:38,337 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:38,338 INFO L85 PathProgramCache]: Analyzing trace with hash -566913869, now seen corresponding path program 1 times [2022-07-20 06:15:38,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:15:38,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848074769] [2022-07-20 06:15:38,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:38,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:15:38,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:15:38,340 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:15:38,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-20 06:15:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:38,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 06:15:38,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:38,611 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:38,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:15:38,761 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 06:15:38,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 18 treesize of output 25 [2022-07-20 06:15:38,794 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:15:38,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:15:38,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-07-20 06:15:39,156 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-20 06:15:39,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 17 [2022-07-20 06:15:39,196 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:15:39,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:15:39,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:15:39,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848074769] [2022-07-20 06:15:39,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848074769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:15:39,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [37012479] [2022-07-20 06:15:39,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:39,521 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 06:15:39,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 06:15:39,522 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 06:15:39,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-07-20 06:15:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:39,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 06:15:39,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:39,841 INFO L356 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-07-20 06:15:39,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 17 [2022-07-20 06:15:39,894 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:15:39,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:15:39,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:15:39,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:15:40,013 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:15:40,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 31 [2022-07-20 06:15:40,122 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:15:40,122 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 18 [2022-07-20 06:15:40,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:15:40,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:15:40,408 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:15:40,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 40 [2022-07-20 06:15:40,905 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:15:40,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 18 [2022-07-20 06:15:41,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:15:41,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:15:41,074 INFO L356 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2022-07-20 06:15:41,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 40 [2022-07-20 06:15:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:15:41,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:15:41,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [37012479] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:15:41,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:15:41,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2022-07-20 06:15:41,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562953583] [2022-07-20 06:15:41,402 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:15:41,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 06:15:41,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:15:41,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 06:15:41,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-07-20 06:15:41,404 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 06:15:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:15:52,410 INFO L93 Difference]: Finished difference Result 129 states and 135 transitions. [2022-07-20 06:15:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 06:15:52,411 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-07-20 06:15:52,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:15:52,411 INFO L225 Difference]: With dead ends: 129 [2022-07-20 06:15:52,412 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 06:15:52,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-07-20 06:15:52,413 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 17 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 841 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 514 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 06:15:52,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 841 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 318 Invalid, 0 Unknown, 514 Unchecked, 0.6s Time] [2022-07-20 06:15:52,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 06:15:52,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-07-20 06:15:52,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 75 states have (on average 1.72) internal successors, (129), 123 states have internal predecessors, (129), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:15:52,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 135 transitions. [2022-07-20 06:15:52,417 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 135 transitions. Word has length 43 [2022-07-20 06:15:52,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:15:52,417 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 135 transitions. [2022-07-20 06:15:52,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 06:15:52,417 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 135 transitions. [2022-07-20 06:15:52,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-20 06:15:52,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:15:52,418 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:15:52,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2022-07-20 06:15:52,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-20 06:15:52,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:15:52,823 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:15:52,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:15:52,824 INFO L85 PathProgramCache]: Analyzing trace with hash -566913868, now seen corresponding path program 1 times [2022-07-20 06:15:52,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:15:52,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [610447218] [2022-07-20 06:15:52,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:52,824 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:15:52,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:15:52,826 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:15:52,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-20 06:15:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:15:53,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 06:15:53,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:15:53,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:53,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:15:53,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:15:53,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:15:55,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:15:55,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-07-20 06:15:55,324 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:15:55,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 12 [2022-07-20 06:15:55,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:15:57,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:15:57,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-07-20 06:15:59,327 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:15:59,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 18 [2022-07-20 06:15:59,447 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:15:59,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:15:59,914 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:15:59,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [610447218] [2022-07-20 06:15:59,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [610447218] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:15:59,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [260968663] [2022-07-20 06:15:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:15:59,915 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 06:15:59,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 06:15:59,920 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 06:15:59,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2022-07-20 06:16:00,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:00,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 06:16:00,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:00,393 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:00,406 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:16:00,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:00,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-07-20 06:16:00,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:16:03,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:03,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-07-20 06:16:03,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:16:03,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:03,701 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-07-20 06:16:03,732 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 06:16:03,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:16:04,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [260968663] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:16:04,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:16:04,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-07-20 06:16:04,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979007] [2022-07-20 06:16:04,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:16:04,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 06:16:04,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:16:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 06:16:04,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=434, Unknown=3, NotChecked=0, Total=506 [2022-07-20 06:16:04,022 INFO L87 Difference]: Start difference. First operand 129 states and 135 transitions. Second operand has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 06:16:07,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:16:07,576 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2022-07-20 06:16:07,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 06:16:07,577 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 43 [2022-07-20 06:16:07,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:16:07,578 INFO L225 Difference]: With dead ends: 128 [2022-07-20 06:16:07,578 INFO L226 Difference]: Without dead ends: 128 [2022-07-20 06:16:07,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=112, Invalid=696, Unknown=4, NotChecked=0, Total=812 [2022-07-20 06:16:07,579 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 21 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 655 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 06:16:07,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 655 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 206 Invalid, 0 Unknown, 342 Unchecked, 0.9s Time] [2022-07-20 06:16:07,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-20 06:16:07,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-07-20 06:16:07,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 75 states have (on average 1.7066666666666668) internal successors, (128), 122 states have internal predecessors, (128), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:16:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 134 transitions. [2022-07-20 06:16:07,583 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 134 transitions. Word has length 43 [2022-07-20 06:16:07,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:16:07,583 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 134 transitions. [2022-07-20 06:16:07,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 15 states have internal predecessors, (60), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 06:16:07,584 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 134 transitions. [2022-07-20 06:16:07,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 06:16:07,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:16:07,585 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:16:07,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:07,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:07,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:16:07,991 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:16:07,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:16:07,991 INFO L85 PathProgramCache]: Analyzing trace with hash 656619060, now seen corresponding path program 1 times [2022-07-20 06:16:07,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:16:07,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [638667149] [2022-07-20 06:16:07,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:07,992 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:16:07,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:16:07,994 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:16:08,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-20 06:16:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:08,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 06:16:08,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:08,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 06:16:08,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:16:08,268 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:16:08,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [638667149] [2022-07-20 06:16:08,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [638667149] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:16:08,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:16:08,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:16:08,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444662615] [2022-07-20 06:16:08,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:16:08,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:16:08,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:16:08,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:16:08,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:16:08,270 INFO L87 Difference]: Start difference. First operand 128 states and 134 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 06:16:08,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:16:08,926 INFO L93 Difference]: Finished difference Result 142 states and 149 transitions. [2022-07-20 06:16:08,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 06:16:08,926 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-20 06:16:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:16:08,927 INFO L225 Difference]: With dead ends: 142 [2022-07-20 06:16:08,927 INFO L226 Difference]: Without dead ends: 142 [2022-07-20 06:16:08,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:16:08,928 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 91 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 06:16:08,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 271 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 06:16:08,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-20 06:16:08,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 124. [2022-07-20 06:16:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 75 states have (on average 1.6533333333333333) internal successors, (124), 118 states have internal predecessors, (124), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:16:08,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 130 transitions. [2022-07-20 06:16:08,931 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 130 transitions. Word has length 45 [2022-07-20 06:16:08,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:16:08,931 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 130 transitions. [2022-07-20 06:16:08,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 06:16:08,932 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 130 transitions. [2022-07-20 06:16:08,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 06:16:08,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:16:08,933 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:16:08,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:09,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:16:09,145 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:16:09,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:16:09,146 INFO L85 PathProgramCache]: Analyzing trace with hash 656619061, now seen corresponding path program 1 times [2022-07-20 06:16:09,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:16:09,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501906108] [2022-07-20 06:16:09,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:09,147 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:16:09,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:16:09,148 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:16:09,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-20 06:16:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:09,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 06:16:09,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:09,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:09,510 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 06:16:09,510 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:16:09,510 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:16:09,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501906108] [2022-07-20 06:16:09,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501906108] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:16:09,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:16:09,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 06:16:09,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305538243] [2022-07-20 06:16:09,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:16:09,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 06:16:09,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:16:09,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 06:16:09,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:16:09,512 INFO L87 Difference]: Start difference. First operand 124 states and 130 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 06:16:10,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:16:10,249 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2022-07-20 06:16:10,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 06:16:10,250 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-20 06:16:10,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:16:10,251 INFO L225 Difference]: With dead ends: 120 [2022-07-20 06:16:10,251 INFO L226 Difference]: Without dead ends: 120 [2022-07-20 06:16:10,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:16:10,259 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 91 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 06:16:10,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 282 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 06:16:10,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-20 06:16:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-20 06:16:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 75 states have (on average 1.6) internal successors, (120), 114 states have internal predecessors, (120), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:16:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2022-07-20 06:16:10,262 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 45 [2022-07-20 06:16:10,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:16:10,262 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2022-07-20 06:16:10,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 06:16:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2022-07-20 06:16:10,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 06:16:10,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:16:10,277 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:16:10,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:10,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:16:10,486 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:16:10,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:16:10,487 INFO L85 PathProgramCache]: Analyzing trace with hash 656619412, now seen corresponding path program 1 times [2022-07-20 06:16:10,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:16:10,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213463641] [2022-07-20 06:16:10,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:10,487 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:16:10,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:16:10,500 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:16:10,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-20 06:16:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:10,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 06:16:10,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 06:16:10,773 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:16:10,773 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:16:10,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213463641] [2022-07-20 06:16:10,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213463641] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:16:10,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:16:10,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 06:16:10,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268968373] [2022-07-20 06:16:10,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:16:10,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 06:16:10,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:16:10,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 06:16:10,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:16:10,775 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 06:16:11,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:16:11,045 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2022-07-20 06:16:11,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 06:16:11,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2022-07-20 06:16:11,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:16:11,047 INFO L225 Difference]: With dead ends: 134 [2022-07-20 06:16:11,047 INFO L226 Difference]: Without dead ends: 134 [2022-07-20 06:16:11,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 06:16:11,047 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 81 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:16:11,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 103 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:16:11,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-07-20 06:16:11,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2022-07-20 06:16:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 75 states have (on average 1.5466666666666666) internal successors, (116), 110 states have internal predecessors, (116), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:16:11,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2022-07-20 06:16:11,051 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 45 [2022-07-20 06:16:11,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:16:11,051 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2022-07-20 06:16:11,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-20 06:16:11,051 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2022-07-20 06:16:11,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 06:16:11,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:16:11,052 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:16:11,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:11,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:16:11,264 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:16:11,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:16:11,264 INFO L85 PathProgramCache]: Analyzing trace with hash 656619413, now seen corresponding path program 1 times [2022-07-20 06:16:11,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:16:11,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683634903] [2022-07-20 06:16:11,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:11,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:16:11,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:16:11,267 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:16:11,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-07-20 06:16:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:11,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 06:16:11,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 06:16:11,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:16:11,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:16:11,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683634903] [2022-07-20 06:16:11,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1683634903] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:16:11,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:16:11,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:16:11,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060824205] [2022-07-20 06:16:11,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:16:11,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:16:11,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:16:11,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:16:11,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:16:11,603 INFO L87 Difference]: Start difference. First operand 116 states and 122 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:16:11,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:16:11,887 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2022-07-20 06:16:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 06:16:11,888 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2022-07-20 06:16:11,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:16:11,888 INFO L225 Difference]: With dead ends: 112 [2022-07-20 06:16:11,888 INFO L226 Difference]: Without dead ends: 112 [2022-07-20 06:16:11,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 06:16:11,889 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 166 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:16:11,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 130 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:16:11,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-20 06:16:11,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-07-20 06:16:11,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 75 states have (on average 1.4933333333333334) internal successors, (112), 106 states have internal predecessors, (112), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:16:11,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 118 transitions. [2022-07-20 06:16:11,892 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 118 transitions. Word has length 45 [2022-07-20 06:16:11,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:16:11,893 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 118 transitions. [2022-07-20 06:16:11,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:16:11,893 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 118 transitions. [2022-07-20 06:16:11,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 06:16:11,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:16:11,893 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:16:11,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:12,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:16:12,106 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:16:12,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:16:12,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1119634675, now seen corresponding path program 1 times [2022-07-20 06:16:12,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:16:12,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115888306] [2022-07-20 06:16:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:12,107 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:16:12,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:16:12,109 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:16:12,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-07-20 06:16:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:12,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 06:16:12,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:12,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:12,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:12,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 8 [2022-07-20 06:16:13,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:13,520 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 21 [2022-07-20 06:16:13,600 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-20 06:16:13,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 36 [2022-07-20 06:16:13,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-07-20 06:16:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:16:13,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:16:14,236 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:16:14,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115888306] [2022-07-20 06:16:14,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115888306] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:16:14,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1464575833] [2022-07-20 06:16:14,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:14,236 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 06:16:14,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 06:16:14,238 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 06:16:14,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2022-07-20 06:16:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:14,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 06:16:14,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:14,822 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:15,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 8 [2022-07-20 06:16:15,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:15,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 21 [2022-07-20 06:16:15,869 INFO L356 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2022-07-20 06:16:15,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 36 [2022-07-20 06:16:16,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-07-20 06:16:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:16:16,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:16:16,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1464575833] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:16:16,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:16:16,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2022-07-20 06:16:16,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237455804] [2022-07-20 06:16:16,454 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:16:16,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 06:16:16,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:16:16,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 06:16:16,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=551, Unknown=6, NotChecked=0, Total=650 [2022-07-20 06:16:16,456 INFO L87 Difference]: Start difference. First operand 112 states and 118 transitions. Second operand has 24 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 06:16:17,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:16:17,982 INFO L93 Difference]: Finished difference Result 111 states and 117 transitions. [2022-07-20 06:16:17,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 06:16:17,982 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-07-20 06:16:17,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:16:17,983 INFO L225 Difference]: With dead ends: 111 [2022-07-20 06:16:17,983 INFO L226 Difference]: Without dead ends: 111 [2022-07-20 06:16:17,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 67 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=153, Invalid=893, Unknown=10, NotChecked=0, Total=1056 [2022-07-20 06:16:17,984 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 26 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 06:16:17,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 626 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 322 Invalid, 0 Unknown, 224 Unchecked, 1.0s Time] [2022-07-20 06:16:17,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-20 06:16:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-07-20 06:16:17,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 75 states have (on average 1.48) internal successors, (111), 105 states have internal predecessors, (111), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:16:17,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 117 transitions. [2022-07-20 06:16:17,988 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 117 transitions. Word has length 46 [2022-07-20 06:16:17,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:16:17,988 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 117 transitions. [2022-07-20 06:16:17,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 06:16:17,988 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 117 transitions. [2022-07-20 06:16:17,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-20 06:16:17,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:16:17,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:16:18,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:18,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:18,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:16:18,421 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:16:18,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:16:18,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1119634674, now seen corresponding path program 1 times [2022-07-20 06:16:18,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:16:18,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1569790464] [2022-07-20 06:16:18,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:18,422 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:16:18,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:16:18,432 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:16:18,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-07-20 06:16:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:18,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-20 06:16:18,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:19,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:19,096 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:19,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:19,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 14 [2022-07-20 06:16:19,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:16:20,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:20,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:16:20,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:20,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 [2022-07-20 06:16:20,425 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-20 06:16:20,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 19 [2022-07-20 06:16:20,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:20,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 06:16:20,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-07-20 06:16:20,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:16:20,736 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:16:20,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:16:21,445 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:16:21,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1569790464] [2022-07-20 06:16:21,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1569790464] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:16:21,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1742603694] [2022-07-20 06:16:21,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:21,446 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 06:16:21,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 06:16:21,447 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 06:16:21,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2022-07-20 06:16:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:22,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-20 06:16:22,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:22,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:22,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:23,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 22 treesize of output 14 [2022-07-20 06:16:23,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:16:23,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:23,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 [2022-07-20 06:16:23,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:23,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-07-20 06:16:23,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:23,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 06:16:23,701 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-20 06:16:23,702 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 19 [2022-07-20 06:16:23,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2022-07-20 06:16:23,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:16:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:16:24,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:16:24,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1742603694] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:16:24,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:16:24,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 26 [2022-07-20 06:16:24,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613976162] [2022-07-20 06:16:24,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:16:24,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 06:16:24,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:16:24,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 06:16:24,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=803, Unknown=15, NotChecked=0, Total=930 [2022-07-20 06:16:24,693 INFO L87 Difference]: Start difference. First operand 111 states and 117 transitions. Second operand has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 06:16:27,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:16:27,770 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2022-07-20 06:16:27,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 06:16:27,771 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2022-07-20 06:16:27,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:16:27,772 INFO L225 Difference]: With dead ends: 110 [2022-07-20 06:16:27,772 INFO L226 Difference]: Without dead ends: 110 [2022-07-20 06:16:27,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=183, Invalid=1280, Unknown=19, NotChecked=0, Total=1482 [2022-07-20 06:16:27,773 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 21 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:16:27,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 839 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 637 Invalid, 0 Unknown, 204 Unchecked, 2.1s Time] [2022-07-20 06:16:27,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-20 06:16:27,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-07-20 06:16:27,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 75 states have (on average 1.4666666666666666) internal successors, (110), 104 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:16:27,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 116 transitions. [2022-07-20 06:16:27,776 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 116 transitions. Word has length 46 [2022-07-20 06:16:27,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:16:27,777 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 116 transitions. [2022-07-20 06:16:27,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 06:16:27,777 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 116 transitions. [2022-07-20 06:16:27,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 06:16:27,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:16:27,777 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:16:27,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (27)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:28,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:28,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:16:28,203 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:16:28,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:16:28,203 INFO L85 PathProgramCache]: Analyzing trace with hash 2067869774, now seen corresponding path program 1 times [2022-07-20 06:16:28,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:16:28,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1302092939] [2022-07-20 06:16:28,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:28,204 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:16:28,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:16:28,208 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:16:28,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-07-20 06:16:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:28,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-20 06:16:28,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:28,877 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:29,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-07-20 06:16:29,538 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:16:29,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 29 [2022-07-20 06:16:29,552 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 06:16:29,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 10 [2022-07-20 06:16:29,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:16:30,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:30,201 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:16:30,201 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 38 [2022-07-20 06:16:30,263 INFO L356 Elim1Store]: treesize reduction 86, result has 36.3 percent of original size [2022-07-20 06:16:30,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 67 [2022-07-20 06:16:30,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:30,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-20 06:16:30,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:16:30,830 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:16:30,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 60 treesize of output 43 [2022-07-20 06:16:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:16:31,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:16:31,920 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:16:31,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1302092939] [2022-07-20 06:16:31,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1302092939] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:16:31,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2128654014] [2022-07-20 06:16:31,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:31,921 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 06:16:31,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 06:16:31,923 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 06:16:31,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2022-07-20 06:16:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:32,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-20 06:16:32,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:32,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:33,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-07-20 06:16:34,063 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:16:34,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 17 [2022-07-20 06:16:34,074 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:16:34,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:34,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 14 treesize of output 16 [2022-07-20 06:16:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:34,566 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:16:34,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 38 [2022-07-20 06:16:34,628 INFO L356 Elim1Store]: treesize reduction 86, result has 36.3 percent of original size [2022-07-20 06:16:34,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 38 treesize of output 67 [2022-07-20 06:16:34,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:16:35,279 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:16:35,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 31 [2022-07-20 06:16:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:16:35,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:16:35,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2128654014] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:16:35,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:16:35,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 35 [2022-07-20 06:16:35,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027981682] [2022-07-20 06:16:35,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:16:35,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-20 06:16:35,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:16:35,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-20 06:16:35,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1478, Unknown=4, NotChecked=0, Total=1640 [2022-07-20 06:16:35,783 INFO L87 Difference]: Start difference. First operand 110 states and 116 transitions. Second operand has 36 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:16:38,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:16:38,456 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2022-07-20 06:16:38,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 06:16:38,459 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2022-07-20 06:16:38,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:16:38,460 INFO L225 Difference]: With dead ends: 109 [2022-07-20 06:16:38,460 INFO L226 Difference]: Without dead ends: 109 [2022-07-20 06:16:38,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 60 SyntacticMatches, 11 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=257, Invalid=2285, Unknown=8, NotChecked=0, Total=2550 [2022-07-20 06:16:38,461 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 23 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-20 06:16:38,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 1009 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 587 Invalid, 0 Unknown, 360 Unchecked, 1.7s Time] [2022-07-20 06:16:38,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-20 06:16:38,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-07-20 06:16:38,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 75 states have (on average 1.4533333333333334) internal successors, (109), 103 states have internal predecessors, (109), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:16:38,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2022-07-20 06:16:38,464 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 48 [2022-07-20 06:16:38,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:16:38,464 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2022-07-20 06:16:38,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:16:38,464 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2022-07-20 06:16:38,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 06:16:38,465 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:16:38,465 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:16:38,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:38,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:38,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:16:38,873 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:16:38,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:16:38,874 INFO L85 PathProgramCache]: Analyzing trace with hash 2067869775, now seen corresponding path program 1 times [2022-07-20 06:16:38,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:16:38,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [157561625] [2022-07-20 06:16:38,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:38,874 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:16:38,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:16:38,886 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:16:38,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-07-20 06:16:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:39,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-20 06:16:39,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:39,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:39,421 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:39,961 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 06:16:39,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 28 [2022-07-20 06:16:39,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-07-20 06:16:40,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:16:40,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-07-20 06:16:41,136 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-20 06:16:41,136 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 68 treesize of output 44 [2022-07-20 06:16:41,164 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:16:41,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:16:41,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-20 06:16:41,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:16:41,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:41,892 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:16:41,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 74 treesize of output 64 [2022-07-20 06:16:41,940 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-20 06:16:41,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2022-07-20 06:16:41,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 06:16:41,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:41,989 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:16:41,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-20 06:16:42,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:16:42,503 INFO L356 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2022-07-20 06:16:42,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 56 [2022-07-20 06:16:42,547 INFO L356 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2022-07-20 06:16:42,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-07-20 06:16:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:16:42,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:16:44,281 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:16:44,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [157561625] [2022-07-20 06:16:44,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [157561625] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:16:44,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [662818442] [2022-07-20 06:16:44,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:44,282 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 06:16:44,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 06:16:44,284 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 06:16:44,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2022-07-20 06:16:45,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:45,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-20 06:16:45,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:45,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:45,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:46,073 INFO L356 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2022-07-20 06:16:46,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 28 [2022-07-20 06:16:46,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 14 [2022-07-20 06:16:47,445 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 13 treesize of output 9 [2022-07-20 06:16:47,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:16:48,306 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:16:48,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 35 [2022-07-20 06:16:48,323 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:16:48,324 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:16:49,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:49,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 06:16:49,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:49,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:49,118 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-20 06:16:49,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2022-07-20 06:16:49,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:49,201 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:16:49,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 74 treesize of output 64 [2022-07-20 06:16:49,263 INFO L356 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2022-07-20 06:16:49,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2022-07-20 06:16:50,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:16:50,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 06:16:50,168 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:16:50,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 47 [2022-07-20 06:16:50,203 INFO L356 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-07-20 06:16:50,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 18 [2022-07-20 06:16:50,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:16:50,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:16:51,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [662818442] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:16:51,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:16:51,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2022-07-20 06:16:51,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308807338] [2022-07-20 06:16:51,136 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:16:51,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 06:16:51,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:16:51,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 06:16:51,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1702, Unknown=16, NotChecked=0, Total=1892 [2022-07-20 06:16:51,138 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 38 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 31 states have internal predecessors, (60), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:16:54,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:16:54,370 INFO L93 Difference]: Finished difference Result 164 states and 174 transitions. [2022-07-20 06:16:54,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 06:16:54,371 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 31 states have internal predecessors, (60), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 48 [2022-07-20 06:16:54,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:16:54,372 INFO L225 Difference]: With dead ends: 164 [2022-07-20 06:16:54,372 INFO L226 Difference]: Without dead ends: 164 [2022-07-20 06:16:54,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 62 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=257, Invalid=2373, Unknown=22, NotChecked=0, Total=2652 [2022-07-20 06:16:54,374 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 103 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-20 06:16:54,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 847 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 527 Invalid, 0 Unknown, 269 Unchecked, 1.6s Time] [2022-07-20 06:16:54,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-20 06:16:54,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 108. [2022-07-20 06:16:54,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 75 states have (on average 1.44) internal successors, (108), 102 states have internal predecessors, (108), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:16:54,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2022-07-20 06:16:54,388 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 48 [2022-07-20 06:16:54,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:16:54,388 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2022-07-20 06:16:54,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 31 states have internal predecessors, (60), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 06:16:54,389 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2022-07-20 06:16:54,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 06:16:54,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:16:54,395 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:16:54,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (30)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:54,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:54,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2022-07-20 06:16:54,810 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:16:54,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:16:54,811 INFO L85 PathProgramCache]: Analyzing trace with hash -645963400, now seen corresponding path program 1 times [2022-07-20 06:16:54,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:16:54,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848881999] [2022-07-20 06:16:54,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:54,811 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:16:54,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:16:54,813 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:16:54,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2022-07-20 06:16:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:55,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 06:16:55,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:55,176 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 06:16:55,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:16:55,177 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:16:55,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848881999] [2022-07-20 06:16:55,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848881999] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:16:55,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:16:55,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 06:16:55,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151681610] [2022-07-20 06:16:55,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:16:55,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 06:16:55,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:16:55,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 06:16:55,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 06:16:55,179 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:16:55,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:16:55,453 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2022-07-20 06:16:55,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 06:16:55,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-07-20 06:16:55,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:16:55,455 INFO L225 Difference]: With dead ends: 123 [2022-07-20 06:16:55,455 INFO L226 Difference]: Without dead ends: 123 [2022-07-20 06:16:55,455 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:16:55,455 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 156 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 06:16:55,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 118 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 06:16:55,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-20 06:16:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 105. [2022-07-20 06:16:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 75 states have (on average 1.4) internal successors, (105), 99 states have internal predecessors, (105), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:16:55,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 111 transitions. [2022-07-20 06:16:55,459 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 111 transitions. Word has length 49 [2022-07-20 06:16:55,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:16:55,459 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 111 transitions. [2022-07-20 06:16:55,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.666666666666666) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:16:55,459 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 111 transitions. [2022-07-20 06:16:55,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 06:16:55,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:16:55,459 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:16:55,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:55,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:16:55,660 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:16:55,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:16:55,661 INFO L85 PathProgramCache]: Analyzing trace with hash -645963399, now seen corresponding path program 1 times [2022-07-20 06:16:55,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:16:55,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [104408477] [2022-07-20 06:16:55,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:55,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:16:55,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:16:55,663 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:16:55,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2022-07-20 06:16:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:55,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 06:16:55,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:56,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 06:16:56,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:16:56,094 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:16:56,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [104408477] [2022-07-20 06:16:56,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [104408477] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:16:56,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:16:56,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 06:16:56,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596782147] [2022-07-20 06:16:56,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:16:56,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 06:16:56,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:16:56,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 06:16:56,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 06:16:56,095 INFO L87 Difference]: Start difference. First operand 105 states and 111 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:16:56,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:16:56,323 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2022-07-20 06:16:56,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 06:16:56,324 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2022-07-20 06:16:56,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:16:56,325 INFO L225 Difference]: With dead ends: 102 [2022-07-20 06:16:56,325 INFO L226 Difference]: Without dead ends: 102 [2022-07-20 06:16:56,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-20 06:16:56,325 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 209 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:16:56,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 102 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 06:16:56,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-20 06:16:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-07-20 06:16:56,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 75 states have (on average 1.36) internal successors, (102), 96 states have internal predecessors, (102), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:16:56,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2022-07-20 06:16:56,328 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 49 [2022-07-20 06:16:56,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:16:56,329 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2022-07-20 06:16:56,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:16:56,329 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2022-07-20 06:16:56,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 06:16:56,329 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:16:56,329 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:16:56,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:56,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:16:56,544 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:16:56,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:16:56,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1999432508, now seen corresponding path program 1 times [2022-07-20 06:16:56,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:16:56,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650525404] [2022-07-20 06:16:56,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:56,546 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:16:56,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:16:56,548 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:16:56,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2022-07-20 06:16:56,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:56,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 06:16:56,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:56,953 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:57,102 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:16:57,123 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 9 [2022-07-20 06:16:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 06:16:57,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:16:57,152 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:16:57,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650525404] [2022-07-20 06:16:57,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650525404] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:16:57,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:16:57,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 06:16:57,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795314639] [2022-07-20 06:16:57,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:16:57,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:16:57,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:16:57,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:16:57,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:16:57,154 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand has 10 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:16:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:16:58,475 INFO L93 Difference]: Finished difference Result 168 states and 180 transitions. [2022-07-20 06:16:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 06:16:58,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-07-20 06:16:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:16:58,477 INFO L225 Difference]: With dead ends: 168 [2022-07-20 06:16:58,477 INFO L226 Difference]: Without dead ends: 168 [2022-07-20 06:16:58,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-07-20 06:16:58,478 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 255 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 06:16:58,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 384 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-20 06:16:58,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-20 06:16:58,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 105. [2022-07-20 06:16:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 79 states have (on average 1.3417721518987342) internal successors, (106), 99 states have internal predecessors, (106), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:16:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2022-07-20 06:16:58,481 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 51 [2022-07-20 06:16:58,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:16:58,481 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2022-07-20 06:16:58,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:16:58,481 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2022-07-20 06:16:58,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-20 06:16:58,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:16:58,482 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:16:58,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2022-07-20 06:16:58,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:16:58,699 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:16:58,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:16:58,700 INFO L85 PathProgramCache]: Analyzing trace with hash 1999432509, now seen corresponding path program 1 times [2022-07-20 06:16:58,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:16:58,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1359730325] [2022-07-20 06:16:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:16:58,700 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:16:58,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:16:58,702 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:16:58,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2022-07-20 06:16:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:16:59,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 06:16:59,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:16:59,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:16:59,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:16:59,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 06:16:59,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 9 [2022-07-20 06:16:59,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:16:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-20 06:16:59,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 06:16:59,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:16:59,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1359730325] [2022-07-20 06:16:59,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1359730325] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 06:16:59,366 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 06:16:59,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 06:16:59,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101562337] [2022-07-20 06:16:59,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 06:16:59,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 06:16:59,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:16:59,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 06:16:59,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-20 06:16:59,368 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 10 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:17:00,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:17:00,628 INFO L93 Difference]: Finished difference Result 154 states and 165 transitions. [2022-07-20 06:17:00,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 06:17:00,629 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2022-07-20 06:17:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:17:00,630 INFO L225 Difference]: With dead ends: 154 [2022-07-20 06:17:00,630 INFO L226 Difference]: Without dead ends: 154 [2022-07-20 06:17:00,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-20 06:17:00,630 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 188 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:17:00,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 400 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-20 06:17:00,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-20 06:17:00,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 107. [2022-07-20 06:17:00,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 81 states have (on average 1.3333333333333333) internal successors, (108), 101 states have internal predecessors, (108), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:17:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 114 transitions. [2022-07-20 06:17:00,633 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 114 transitions. Word has length 51 [2022-07-20 06:17:00,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:17:00,634 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 114 transitions. [2022-07-20 06:17:00,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-20 06:17:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 114 transitions. [2022-07-20 06:17:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 06:17:00,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:17:00,634 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:17:00,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2022-07-20 06:17:00,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:17:00,841 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:17:00,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:17:00,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1604261226, now seen corresponding path program 1 times [2022-07-20 06:17:00,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:17:00,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57305695] [2022-07-20 06:17:00,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:17:00,842 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:17:00,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:17:00,844 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:17:00,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2022-07-20 06:17:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:17:01,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 06:17:01,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:17:01,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 06:17:01,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:17:02,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:17:02,105 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2022-07-20 06:17:02,199 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-20 06:17:02,230 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:17:02,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:17:02,410 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:17:02,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57305695] [2022-07-20 06:17:02,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57305695] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:17:02,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [395758338] [2022-07-20 06:17:02,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:17:02,410 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 06:17:02,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 06:17:02,412 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 06:17:02,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2022-07-20 06:17:03,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:17:03,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 06:17:03,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:17:04,085 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:17:04,868 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:17:04,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 21 [2022-07-20 06:17:05,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-07-20 06:17:05,117 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 06:17:05,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:17:05,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [395758338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:17:05,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 06:17:05,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 33 [2022-07-20 06:17:05,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701304830] [2022-07-20 06:17:05,353 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 06:17:05,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 06:17:05,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-20 06:17:05,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 06:17:05,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1029, Unknown=73, NotChecked=0, Total=1260 [2022-07-20 06:17:05,354 INFO L87 Difference]: Start difference. First operand 107 states and 114 transitions. Second operand has 33 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 28 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 06:17:05,803 WARN L855 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_2858 (Array (_ BitVec 32) (_ BitVec 32)))) (= (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_2858) |c_#memory_$Pointer$.base|)) (exists ((|node_create_~temp~0#1.base| (_ BitVec 32)) (v_ArrVal_2747 (Array (_ BitVec 32) (_ BitVec 32)))) (and (not (= (_ bv0 32) |node_create_~temp~0#1.base|)) (= (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| v_ArrVal_2747) |c_#memory_$Pointer$.base|) (bvult |node_create_~temp~0#1.base| |c_#StackHeapBarrier|))) (bvult (_ bv0 32) |c_#StackHeapBarrier|) (not (= |c_#StackHeapBarrier| (_ bv4294967295 32))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32))) (not (= (_ bv0 32) |c_node_create_~temp~0#1.base|))) is different from true [2022-07-20 06:17:07,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 06:17:07,109 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2022-07-20 06:17:07,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 06:17:07,110 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 28 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 53 [2022-07-20 06:17:07,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 06:17:07,110 INFO L225 Difference]: With dead ends: 114 [2022-07-20 06:17:07,111 INFO L226 Difference]: Without dead ends: 114 [2022-07-20 06:17:07,111 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=260, Invalid=1630, Unknown=94, NotChecked=86, Total=2070 [2022-07-20 06:17:07,112 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 59 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 06:17:07,112 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1270 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 353 Invalid, 0 Unknown, 199 Unchecked, 1.1s Time] [2022-07-20 06:17:07,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-20 06:17:07,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 98. [2022-07-20 06:17:07,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.3472222222222223) internal successors, (97), 92 states have internal predecessors, (97), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-20 06:17:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2022-07-20 06:17:07,124 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 53 [2022-07-20 06:17:07,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 06:17:07,124 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2022-07-20 06:17:07,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.7096774193548385) internal successors, (84), 28 states have internal predecessors, (84), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 06:17:07,125 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2022-07-20 06:17:07,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-20 06:17:07,125 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 06:17:07,125 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 06:17:07,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (37)] Forceful destruction successful, exit code 0 [2022-07-20 06:17:07,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2022-07-20 06:17:07,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-20 06:17:07,541 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 61 more)] === [2022-07-20 06:17:07,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 06:17:07,541 INFO L85 PathProgramCache]: Analyzing trace with hash -696733545, now seen corresponding path program 1 times [2022-07-20 06:17:07,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-20 06:17:07,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1520722367] [2022-07-20 06:17:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:17:07,542 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-20 06:17:07,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-20 06:17:07,544 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-20 06:17:07,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2022-07-20 06:17:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:17:08,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-20 06:17:08,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:17:08,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:17:08,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:17:08,418 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 06:17:08,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 12 treesize of output 12 [2022-07-20 06:17:08,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:17:08,933 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 06:17:09,212 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-20 06:17:09,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 25 [2022-07-20 06:17:09,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:17:09,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 8 treesize of output 6 [2022-07-20 06:17:09,886 INFO L356 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-07-20 06:17:09,887 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 41 [2022-07-20 06:17:09,902 INFO L356 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2022-07-20 06:17:09,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 17 [2022-07-20 06:17:09,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 13 [2022-07-20 06:17:09,950 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 06:17:09,951 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 [2022-07-20 06:17:09,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:17:10,298 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 06:17:10,750 INFO L356 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-07-20 06:17:10,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2022-07-20 06:17:10,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-07-20 06:17:10,937 INFO L356 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-07-20 06:17:10,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 51 [2022-07-20 06:17:10,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 23 [2022-07-20 06:17:11,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 06:17:11,265 INFO L356 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-07-20 06:17:11,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 47 [2022-07-20 06:17:11,556 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-20 06:17:11,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 46 treesize of output 34 [2022-07-20 06:17:11,722 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 06:17:11,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 06:17:12,355 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2980 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (bvneg (select |c_#valid| (select (select (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_#t~mem12#1.base| v_ArrVal_2980) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_2982) |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) (_ bv1 1)) (_ bv0 1))) is different from false [2022-07-20 06:17:12,384 INFO L356 Elim1Store]: treesize reduction 5, result has 79.2 percent of original size [2022-07-20 06:17:12,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 31 treesize of output 30 [2022-07-20 06:17:12,436 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2980 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_dll_circular_append_#t~mem11#1.base| (select (select (store (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_#t~mem11#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_append_#t~mem11#1.offset|)) v_ArrVal_2980) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_2982) |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) is different from false [2022-07-20 06:17:12,537 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2980 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) v_ArrVal_2980) |c_ULTIMATE.start_dll_circular_append_~new_last~0#1.base| v_ArrVal_2982) |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|)))) is different from false [2022-07-20 06:17:12,626 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2982 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2980 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) (= .cse0 (select (select (store (store |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| .cse0) (bvadd (_ bv4 32) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|))) v_ArrVal_2980) |c_ULTIMATE.start_dll_circular_append_#t~ret9#1.base| v_ArrVal_2982) |c_ULTIMATE.start_dll_circular_append_~head#1.base|) |c_ULTIMATE.start_dll_circular_append_~head#1.offset|)))) is different from false [2022-07-20 06:17:13,022 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-20 06:17:13,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1520722367] [2022-07-20 06:17:13,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1520722367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 06:17:13,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1542516514] [2022-07-20 06:17:13,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 06:17:13,023 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-20 06:17:13,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-20 06:17:13,024 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-20 06:17:13,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2022-07-20 06:17:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 06:17:13,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 06:17:13,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 06:17:14,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:17:15,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 6 treesize of output 5 [2022-07-20 06:17:15,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 3 [2022-07-20 06:17:16,327 INFO L356 Elim1Store]: treesize reduction 50, result has 41.2 percent of original size [2022-07-20 06:17:16,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 56 [2022-07-20 06:17:21,626 INFO L356 Elim1Store]: treesize reduction 50, result has 71.6 percent of original size [2022-07-20 06:17:21,626 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 109 treesize of output 218 [2022-07-20 06:17:26,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-07-20 06:17:34,187 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:17:34,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 97 treesize of output 85 [2022-07-20 06:17:34,903 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 06:17:34,903 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 106 treesize of output 114