./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.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/array-examples/standard_strcpy_ground-2.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 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:30:36,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:30:36,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:30:36,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:30:36,949 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:30:36,950 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:30:36,954 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:30:36,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:30:36,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:30:36,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:30:36,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:30:36,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:30:36,965 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:30:36,966 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:30:36,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:30:36,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:30:36,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:30:36,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:30:36,974 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:30:36,979 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:30:36,981 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:30:36,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:30:36,982 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:30:36,983 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:30:36,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:30:36,990 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:30:36,990 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:30:36,991 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:30:36,992 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:30:36,992 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:30:36,993 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:30:36,993 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:30:36,995 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:30:36,995 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:30:36,996 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:30:36,996 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:30:36,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:30:36,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:30:36,997 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:30:36,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:30:36,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:30:37,000 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:30:37,002 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:30:37,033 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:30:37,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:30:37,033 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:30:37,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:30:37,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:30:37,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:30:37,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:30:37,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:30:37,035 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:30:37,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:30:37,036 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:30:37,036 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:30:37,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:30:37,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:30:37,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:30:37,037 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:30:37,037 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:30:37,037 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:30:37,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:30:37,039 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:30:37,043 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:30:37,043 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:30:37,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:30:37,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:30:37,045 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:30:37,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:30:37,046 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:30:37,046 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:30:37,046 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:30:37,046 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:30:37,047 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 [2022-07-20 05:30:37,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:30:37,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:30:37,285 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:30:37,286 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:30:37,286 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:30:37,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2022-07-20 05:30:37,355 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5312de19a/5f6838ea018144c19ca0850c4a50c9d6/FLAG78844fe9d [2022-07-20 05:30:37,702 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:30:37,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2022-07-20 05:30:37,708 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5312de19a/5f6838ea018144c19ca0850c4a50c9d6/FLAG78844fe9d [2022-07-20 05:30:38,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5312de19a/5f6838ea018144c19ca0850c4a50c9d6 [2022-07-20 05:30:38,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:30:38,108 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:30:38,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:30:38,110 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:30:38,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:30:38,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:30:38" (1/1) ... [2022-07-20 05:30:38,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fc47bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:38, skipping insertion in model container [2022-07-20 05:30:38,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:30:38" (1/1) ... [2022-07-20 05:30:38,120 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:30:38,130 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:30:38,232 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/array-examples/standard_strcpy_ground-2.i[817,830] [2022-07-20 05:30:38,245 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:30:38,257 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:30:38,270 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/array-examples/standard_strcpy_ground-2.i[817,830] [2022-07-20 05:30:38,275 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:30:38,286 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:30:38,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:38 WrapperNode [2022-07-20 05:30:38,287 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:30:38,289 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:30:38,289 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:30:38,289 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:30:38,295 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:38" (1/1) ... [2022-07-20 05:30:38,309 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:38" (1/1) ... [2022-07-20 05:30:38,325 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2022-07-20 05:30:38,325 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:30:38,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:30:38,326 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:30:38,326 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:30:38,331 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:38" (1/1) ... [2022-07-20 05:30:38,331 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:38" (1/1) ... [2022-07-20 05:30:38,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:38" (1/1) ... [2022-07-20 05:30:38,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:38" (1/1) ... [2022-07-20 05:30:38,338 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:38" (1/1) ... [2022-07-20 05:30:38,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:38" (1/1) ... [2022-07-20 05:30:38,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:38" (1/1) ... [2022-07-20 05:30:38,344 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:30:38,345 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:30:38,345 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:30:38,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:30:38,346 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:38" (1/1) ... [2022-07-20 05:30:38,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:30:38,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:38,376 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 05:30:38,402 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 05:30:38,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 05:30:38,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 05:30:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 05:30:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 05:30:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:30:38,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:30:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 05:30:38,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:30:38,486 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:30:38,487 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:30:38,629 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:30:38,634 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:30:38,634 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 05:30:38,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:30:38 BoogieIcfgContainer [2022-07-20 05:30:38,636 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:30:38,638 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:30:38,638 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:30:38,640 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:30:38,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:30:38" (1/3) ... [2022-07-20 05:30:38,641 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7754db43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:30:38, skipping insertion in model container [2022-07-20 05:30:38,641 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:30:38" (2/3) ... [2022-07-20 05:30:38,642 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7754db43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:30:38, skipping insertion in model container [2022-07-20 05:30:38,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:30:38" (3/3) ... [2022-07-20 05:30:38,643 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-2.i [2022-07-20 05:30:38,655 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:30:38,655 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2022-07-20 05:30:38,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:30:38,694 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@5664994a, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@e0a4360 [2022-07-20 05:30:38,694 INFO L358 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2022-07-20 05:30:38,697 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 24 states have (on average 1.875) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:38,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-20 05:30:38,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:38,702 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-20 05:30:38,702 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:30:38,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:38,706 INFO L85 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2022-07-20 05:30:38,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:38,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557217339] [2022-07-20 05:30:38,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:38,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:38,893 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 05:30:38,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:38,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557217339] [2022-07-20 05:30:38,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557217339] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:30:38,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:30:38,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:30:38,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149549212] [2022-07-20 05:30:38,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:30:38,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:30:38,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:38,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:30:38,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:30:38,921 INFO L87 Difference]: Start difference. First operand has 39 states, 24 states have (on average 1.875) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:38,966 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2022-07-20 05:30:38,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:30:38,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-20 05:30:38,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:38,974 INFO L225 Difference]: With dead ends: 35 [2022-07-20 05:30:38,975 INFO L226 Difference]: Without dead ends: 33 [2022-07-20 05:30:38,976 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 05:30:38,987 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:38,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 25 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:30:39,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-20 05:30:39,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-20 05:30:39,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-07-20 05:30:39,022 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 4 [2022-07-20 05:30:39,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:39,022 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-07-20 05:30:39,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:39,024 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-07-20 05:30:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-20 05:30:39,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:39,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-20 05:30:39,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 05:30:39,025 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:30:39,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:39,028 INFO L85 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2022-07-20 05:30:39,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:39,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261021834] [2022-07-20 05:30:39,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:39,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:39,112 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 05:30:39,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:39,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261021834] [2022-07-20 05:30:39,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261021834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:30:39,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:30:39,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:30:39,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488418031] [2022-07-20 05:30:39,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:30:39,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:30:39,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:39,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:30:39,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:30:39,120 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:39,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:39,171 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-07-20 05:30:39,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:30:39,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-20 05:30:39,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:39,175 INFO L225 Difference]: With dead ends: 37 [2022-07-20 05:30:39,175 INFO L226 Difference]: Without dead ends: 37 [2022-07-20 05:30:39,179 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 05:30:39,181 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:39,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:30:39,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-20 05:30:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-20 05:30:39,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.48) internal successors, (37), 34 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-07-20 05:30:39,191 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 4 [2022-07-20 05:30:39,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:39,192 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-07-20 05:30:39,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:39,193 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-07-20 05:30:39,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 05:30:39,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:39,197 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:39,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 05:30:39,198 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:30:39,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:39,200 INFO L85 PathProgramCache]: Analyzing trace with hash 264435913, now seen corresponding path program 1 times [2022-07-20 05:30:39,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:39,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684987664] [2022-07-20 05:30:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:39,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:39,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:39,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:39,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684987664] [2022-07-20 05:30:39,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684987664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:39,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192279669] [2022-07-20 05:30:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:39,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:39,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:39,328 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 05:30:39,329 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 05:30:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:39,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 05:30:39,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:39,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:30:39,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2022-07-20 05:30:39,481 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 10 treesize of output 8 [2022-07-20 05:30:39,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:39,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:30:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:39,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192279669] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:30:39,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:30:39,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-07-20 05:30:39,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137177573] [2022-07-20 05:30:39,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:30:39,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:30:39,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:30:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:30:39,682 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:39,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:39,787 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-07-20 05:30:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:30:39,787 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-20 05:30:39,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:39,792 INFO L225 Difference]: With dead ends: 48 [2022-07-20 05:30:39,793 INFO L226 Difference]: Without dead ends: 48 [2022-07-20 05:30:39,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-07-20 05:30:39,797 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:39,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:30:39,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-20 05:30:39,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2022-07-20 05:30:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-07-20 05:30:39,807 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 8 [2022-07-20 05:30:39,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:39,808 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-07-20 05:30:39,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:39,808 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-07-20 05:30:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-20 05:30:39,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:39,809 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-20 05:30:39,836 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 05:30:40,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:40,034 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:30:40,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:40,034 INFO L85 PathProgramCache]: Analyzing trace with hash -4646106, now seen corresponding path program 1 times [2022-07-20 05:30:40,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:40,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691890017] [2022-07-20 05:30:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:40,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:30:40,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:40,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691890017] [2022-07-20 05:30:40,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691890017] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:40,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106582769] [2022-07-20 05:30:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:40,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:40,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:40,152 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 05:30:40,174 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 05:30:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:40,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 05:30:40,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:40,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:40,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:30:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:40,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106582769] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:30:40,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:30:40,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2022-07-20 05:30:40,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186981237] [2022-07-20 05:30:40,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:30:40,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:30:40,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:40,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:30:40,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:30:40,334 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:40,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:40,579 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2022-07-20 05:30:40,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-20 05:30:40,579 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-20 05:30:40,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:40,581 INFO L225 Difference]: With dead ends: 197 [2022-07-20 05:30:40,581 INFO L226 Difference]: Without dead ends: 197 [2022-07-20 05:30:40,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:30:40,582 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 363 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:40,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 123 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:30:40,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-20 05:30:40,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 54. [2022-07-20 05:30:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-07-20 05:30:40,589 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 13 [2022-07-20 05:30:40,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:40,589 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-07-20 05:30:40,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:40,589 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-07-20 05:30:40,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 05:30:40,590 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:40,590 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1] [2022-07-20 05:30:40,621 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 05:30:40,817 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,SelfDestructingSolverStorable3 [2022-07-20 05:30:40,818 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:30:40,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:40,818 INFO L85 PathProgramCache]: Analyzing trace with hash -2061457070, now seen corresponding path program 2 times [2022-07-20 05:30:40,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:40,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755965575] [2022-07-20 05:30:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:40,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:40,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:40,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755965575] [2022-07-20 05:30:40,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755965575] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:40,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168135499] [2022-07-20 05:30:40,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:30:40,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:40,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:40,983 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 05:30:40,986 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 05:30:41,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:30:41,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:30:41,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 05:30:41,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:41,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:30:41,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2022-07-20 05:30:41,067 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 10 treesize of output 8 [2022-07-20 05:30:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:41,234 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:30:41,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168135499] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:30:41,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:30:41,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2022-07-20 05:30:41,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874733421] [2022-07-20 05:30:41,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:30:41,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-20 05:30:41,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:41,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-20 05:30:41,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:30:41,237 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:41,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:41,406 INFO L93 Difference]: Finished difference Result 136 states and 149 transitions. [2022-07-20 05:30:41,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:30:41,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-20 05:30:41,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:41,407 INFO L225 Difference]: With dead ends: 136 [2022-07-20 05:30:41,407 INFO L226 Difference]: Without dead ends: 136 [2022-07-20 05:30:41,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:30:41,408 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 112 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:41,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 172 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:30:41,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-07-20 05:30:41,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 53. [2022-07-20 05:30:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-07-20 05:30:41,417 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 20 [2022-07-20 05:30:41,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:41,418 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-07-20 05:30:41,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:41,418 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-07-20 05:30:41,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 05:30:41,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:41,419 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:41,440 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 05:30:41,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:41,635 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:30:41,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:41,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674516, now seen corresponding path program 1 times [2022-07-20 05:30:41,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:41,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347333747] [2022-07-20 05:30:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:41,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 05:30:41,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:41,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347333747] [2022-07-20 05:30:41,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347333747] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:30:41,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:30:41,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:30:41,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798501941] [2022-07-20 05:30:41,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:30:41,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:30:41,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:41,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:30:41,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:30:41,720 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:41,731 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-07-20 05:30:41,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:30:41,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-20 05:30:41,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:41,733 INFO L225 Difference]: With dead ends: 51 [2022-07-20 05:30:41,733 INFO L226 Difference]: Without dead ends: 51 [2022-07-20 05:30:41,733 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 05:30:41,734 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:41,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:30:41,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-20 05:30:41,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-20 05:30:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:41,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-07-20 05:30:41,742 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 32 [2022-07-20 05:30:41,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:41,743 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-07-20 05:30:41,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:41,743 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-07-20 05:30:41,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 05:30:41,744 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:41,744 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:41,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 05:30:41,744 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:30:41,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:41,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1934674515, now seen corresponding path program 1 times [2022-07-20 05:30:41,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:41,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594320035] [2022-07-20 05:30:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:41,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 05:30:41,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:41,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594320035] [2022-07-20 05:30:41,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594320035] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:30:41,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:30:41,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:30:41,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770175772] [2022-07-20 05:30:41,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:30:41,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:30:41,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:41,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:30:41,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:30:41,803 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:41,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:41,831 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2022-07-20 05:30:41,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:30:41,832 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-20 05:30:41,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:41,832 INFO L225 Difference]: With dead ends: 68 [2022-07-20 05:30:41,833 INFO L226 Difference]: Without dead ends: 68 [2022-07-20 05:30:41,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:30:41,833 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:41,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 27 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:30:41,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-20 05:30:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2022-07-20 05:30:41,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1875) internal successors, (57), 53 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-07-20 05:30:41,837 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 32 [2022-07-20 05:30:41,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:41,838 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-07-20 05:30:41,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-07-20 05:30:41,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-20 05:30:41,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:41,839 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:41,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 05:30:41,839 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:30:41,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash 154582664, now seen corresponding path program 1 times [2022-07-20 05:30:41,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:41,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76241206] [2022-07-20 05:30:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:41,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:41,878 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 05:30:41,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:41,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76241206] [2022-07-20 05:30:41,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76241206] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:30:41,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:30:41,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:30:41,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068790209] [2022-07-20 05:30:41,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:30:41,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:30:41,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:41,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:30:41,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:30:41,881 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:41,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:41,907 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2022-07-20 05:30:41,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:30:41,907 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-20 05:30:41,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:41,908 INFO L225 Difference]: With dead ends: 60 [2022-07-20 05:30:41,908 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 05:30:41,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:30:41,909 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 10 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:41,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 51 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:30:41,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 05:30:41,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-07-20 05:30:41,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.18) internal successors, (59), 55 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:41,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-07-20 05:30:41,912 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 33 [2022-07-20 05:30:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:41,913 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-07-20 05:30:41,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:41,913 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-07-20 05:30:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 05:30:41,914 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:41,914 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:41,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 05:30:41,914 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:30:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:41,915 INFO L85 PathProgramCache]: Analyzing trace with hash 498629567, now seen corresponding path program 1 times [2022-07-20 05:30:41,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:41,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518566597] [2022-07-20 05:30:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:41,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:41,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:41,977 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:30:41,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:41,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518566597] [2022-07-20 05:30:41,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518566597] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:41,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266875793] [2022-07-20 05:30:41,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:41,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:41,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:41,979 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 05:30:41,985 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 05:30:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:42,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 05:30:42,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:30:42,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:30:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:30:42,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266875793] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:30:42,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:30:42,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-20 05:30:42,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582407022] [2022-07-20 05:30:42,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:30:42,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 05:30:42,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:42,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 05:30:42,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:30:42,189 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:42,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:42,389 INFO L93 Difference]: Finished difference Result 378 states and 393 transitions. [2022-07-20 05:30:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 05:30:42,390 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-20 05:30:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:42,391 INFO L225 Difference]: With dead ends: 378 [2022-07-20 05:30:42,391 INFO L226 Difference]: Without dead ends: 378 [2022-07-20 05:30:42,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:30:42,392 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 531 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:42,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 265 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:30:42,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-07-20 05:30:42,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 88. [2022-07-20 05:30:42,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 87 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:42,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-07-20 05:30:42,399 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 34 [2022-07-20 05:30:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:42,399 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-07-20 05:30:42,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:42,399 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-07-20 05:30:42,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-20 05:30:42,400 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:42,400 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:42,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 05:30:42,615 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 05:30:42,615 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:30:42,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:42,616 INFO L85 PathProgramCache]: Analyzing trace with hash -618447913, now seen corresponding path program 2 times [2022-07-20 05:30:42,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:42,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564588080] [2022-07-20 05:30:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:42,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:30:42,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:42,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564588080] [2022-07-20 05:30:42,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564588080] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:42,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276930929] [2022-07-20 05:30:42,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:30:42,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:42,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:42,801 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 05:30:42,826 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 05:30:42,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:30:42,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:30:42,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 05:30:42,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:42,986 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:30:42,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:30:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:30:43,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276930929] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:30:43,340 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:30:43,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-07-20 05:30:43,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457018680] [2022-07-20 05:30:43,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:30:43,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 05:30:43,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:43,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 05:30:43,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 05:30:43,342 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:43,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:43,810 INFO L93 Difference]: Finished difference Result 794 states and 825 transitions. [2022-07-20 05:30:43,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 05:30:43,811 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-20 05:30:43,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:43,814 INFO L225 Difference]: With dead ends: 794 [2022-07-20 05:30:43,814 INFO L226 Difference]: Without dead ends: 794 [2022-07-20 05:30:43,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 05:30:43,815 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1944 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1944 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:43,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1944 Valid, 502 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:30:43,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2022-07-20 05:30:43,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 152. [2022-07-20 05:30:43,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.0616438356164384) internal successors, (155), 151 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:43,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2022-07-20 05:30:43,823 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 66 [2022-07-20 05:30:43,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:43,823 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2022-07-20 05:30:43,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:43,824 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2022-07-20 05:30:43,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-20 05:30:43,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:43,825 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:43,851 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 05:30:44,039 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 05:30:44,040 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:30:44,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:44,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1529191431, now seen corresponding path program 3 times [2022-07-20 05:30:44,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:44,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893851152] [2022-07-20 05:30:44,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:44,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:44,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 05:30:44,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:44,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893851152] [2022-07-20 05:30:44,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893851152] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:44,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403437416] [2022-07-20 05:30:44,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:30:44,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:44,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:44,525 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 05:30:44,525 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 05:30:44,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-20 05:30:44,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:30:44,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 05:30:44,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:44,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 88 proven. 1 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2022-07-20 05:30:44,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:30:45,099 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 25 treesize of output 21 [2022-07-20 05:30:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2022-07-20 05:30:45,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403437416] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:30:45,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:30:45,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 7, 7] total 45 [2022-07-20 05:30:45,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842922687] [2022-07-20 05:30:45,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:30:45,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-20 05:30:45,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:45,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-20 05:30:45,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=1266, Unknown=0, NotChecked=0, Total=1980 [2022-07-20 05:30:45,285 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:47,389 INFO L93 Difference]: Finished difference Result 821 states and 857 transitions. [2022-07-20 05:30:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-20 05:30:47,390 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2022-07-20 05:30:47,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:47,393 INFO L225 Difference]: With dead ends: 821 [2022-07-20 05:30:47,394 INFO L226 Difference]: Without dead ends: 821 [2022-07-20 05:30:47,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2133, Invalid=3873, Unknown=0, NotChecked=0, Total=6006 [2022-07-20 05:30:47,396 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6743 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6743 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 622 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:47,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6743 Valid, 398 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [622 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 05:30:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2022-07-20 05:30:47,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 313. [2022-07-20 05:30:47,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 307 states have (on average 1.231270358306189) internal successors, (378), 312 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 378 transitions. [2022-07-20 05:30:47,406 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 378 transitions. Word has length 130 [2022-07-20 05:30:47,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:47,407 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 378 transitions. [2022-07-20 05:30:47,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6) internal successors, (162), 45 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:47,407 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 378 transitions. [2022-07-20 05:30:47,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-07-20 05:30:47,413 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:47,414 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:47,439 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 05:30:47,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:47,640 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:30:47,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:47,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1547574073, now seen corresponding path program 1 times [2022-07-20 05:30:47,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:47,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539967129] [2022-07-20 05:30:47,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:47,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:48,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:48,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539967129] [2022-07-20 05:30:48,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539967129] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:48,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424371832] [2022-07-20 05:30:48,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:48,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:48,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:48,188 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 05:30:48,191 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 05:30:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:48,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 05:30:48,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:48,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:48,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:30:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:49,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424371832] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:30:49,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:30:49,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 67 [2022-07-20 05:30:49,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867282188] [2022-07-20 05:30:49,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:30:49,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-20 05:30:49,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:49,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-20 05:30:49,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2022-07-20 05:30:49,797 INFO L87 Difference]: Start difference. First operand 313 states and 378 transitions. Second operand has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:51,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:51,538 INFO L93 Difference]: Finished difference Result 1646 states and 1711 transitions. [2022-07-20 05:30:51,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-20 05:30:51,539 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2022-07-20 05:30:51,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:51,543 INFO L225 Difference]: With dead ends: 1646 [2022-07-20 05:30:51,543 INFO L226 Difference]: Without dead ends: 1646 [2022-07-20 05:30:51,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2022-07-20 05:30:51,545 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4964 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4964 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:51,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4964 Valid, 1062 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 05:30:51,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2022-07-20 05:30:51,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 445. [2022-07-20 05:30:51,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 439 states have (on average 1.1617312072892938) internal successors, (510), 444 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:51,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 510 transitions. [2022-07-20 05:30:51,557 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 510 transitions. Word has length 134 [2022-07-20 05:30:51,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:51,557 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 510 transitions. [2022-07-20 05:30:51,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.955223880597015) internal successors, (265), 67 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:51,557 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 510 transitions. [2022-07-20 05:30:51,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-07-20 05:30:51,560 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:51,560 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:51,583 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 05:30:51,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:51,776 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:30:51,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:51,776 INFO L85 PathProgramCache]: Analyzing trace with hash 964792156, now seen corresponding path program 2 times [2022-07-20 05:30:51,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:51,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804462210] [2022-07-20 05:30:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:51,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:30:53,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:53,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804462210] [2022-07-20 05:30:53,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804462210] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:53,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068124073] [2022-07-20 05:30:53,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:30:53,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:53,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:53,588 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:30:53,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 05:30:53,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 05:30:53,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:30:53,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 05:30:53,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8128 trivial. 0 not checked. [2022-07-20 05:30:54,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:30:54,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068124073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:30:54,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:30:54,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [67] total 69 [2022-07-20 05:30:54,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809912679] [2022-07-20 05:30:54,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:30:54,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:30:54,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:30:54,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:30:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2022-07-20 05:30:54,966 INFO L87 Difference]: Start difference. First operand 445 states and 510 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:54,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:30:54,970 INFO L93 Difference]: Finished difference Result 447 states and 511 transitions. [2022-07-20 05:30:54,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:30:54,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-07-20 05:30:54,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:30:54,972 INFO L225 Difference]: With dead ends: 447 [2022-07-20 05:30:54,972 INFO L226 Difference]: Without dead ends: 443 [2022-07-20 05:30:54,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2215, Invalid=2477, Unknown=0, NotChecked=0, Total=4692 [2022-07-20 05:30:54,974 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:30:54,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 60 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 19 Unchecked, 0.0s Time] [2022-07-20 05:30:54,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-07-20 05:30:54,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-07-20 05:30:54,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 437 states have (on average 1.160183066361556) internal successors, (507), 442 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:54,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 507 transitions. [2022-07-20 05:30:54,982 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 507 transitions. Word has length 266 [2022-07-20 05:30:54,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:30:54,983 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 507 transitions. [2022-07-20 05:30:54,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:30:54,983 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 507 transitions. [2022-07-20 05:30:54,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-07-20 05:30:54,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:30:54,986 INFO L195 NwaCegarLoop]: trace histogram [64, 64, 64, 64, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:30:55,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-20 05:30:55,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 05:30:55,208 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:30:55,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:30:55,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1298464006, now seen corresponding path program 1 times [2022-07-20 05:30:55,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:30:55,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291534936] [2022-07-20 05:30:55,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:55,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:30:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:30:56,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:30:56,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291534936] [2022-07-20 05:30:56,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291534936] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:30:56,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023613730] [2022-07-20 05:30:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:30:56,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:30:56,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:30:56,885 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:30:56,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 05:30:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:30:57,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-20 05:30:57,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:30:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:30:57,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:31:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 8132 backedges. 0 proven. 8128 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:31:01,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023613730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:31:01,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:31:01,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2022-07-20 05:31:01,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265136224] [2022-07-20 05:31:01,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:31:01,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-07-20 05:31:01,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:31:01,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-07-20 05:31:01,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2022-07-20 05:31:01,585 INFO L87 Difference]: Start difference. First operand 443 states and 507 transitions. Second operand has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:31:15,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:31:15,777 INFO L93 Difference]: Finished difference Result 3357 states and 3488 transitions. [2022-07-20 05:31:15,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-07-20 05:31:15,778 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 269 [2022-07-20 05:31:15,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:31:15,787 INFO L225 Difference]: With dead ends: 3357 [2022-07-20 05:31:15,787 INFO L226 Difference]: Without dead ends: 3357 [2022-07-20 05:31:15,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8778, Invalid=8778, Unknown=0, NotChecked=0, Total=17556 [2022-07-20 05:31:15,791 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 12670 mSDsluCounter, 2102 mSDsCounter, 0 mSdLazyCounter, 1428 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12670 SdHoareTripleChecker+Valid, 2122 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 1428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:31:15,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12670 Valid, 2122 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 1428 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-20 05:31:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2022-07-20 05:31:15,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 707. [2022-07-20 05:31:15,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 701 states have (on average 1.0998573466476462) internal successors, (771), 706 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:31:15,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 771 transitions. [2022-07-20 05:31:15,810 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 771 transitions. Word has length 269 [2022-07-20 05:31:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:31:15,811 INFO L495 AbstractCegarLoop]: Abstraction has 707 states and 771 transitions. [2022-07-20 05:31:15,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.9774436090225564) internal successors, (529), 133 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:31:15,812 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 771 transitions. [2022-07-20 05:31:15,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2022-07-20 05:31:15,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:31:15,819 INFO L195 NwaCegarLoop]: trace histogram [130, 130, 130, 130, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:31:15,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 05:31:16,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-20 05:31:16,036 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:31:16,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:31:16,036 INFO L85 PathProgramCache]: Analyzing trace with hash 470641012, now seen corresponding path program 2 times [2022-07-20 05:31:16,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:31:16,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548685428] [2022-07-20 05:31:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:31:16,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:31:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:31:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 33670 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 05:31:21,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:31:21,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548685428] [2022-07-20 05:31:21,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548685428] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:31:21,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732356211] [2022-07-20 05:31:21,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:31:21,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:21,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:31:21,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:31:21,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 05:31:21,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 05:31:21,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:31:21,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 05:31:21,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:31:21,861 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 10 treesize of output 8 [2022-07-20 05:31:21,866 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 11 [2022-07-20 05:31:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33671 trivial. 0 not checked. [2022-07-20 05:31:26,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:31:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 33674 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 33671 trivial. 0 not checked. [2022-07-20 05:31:32,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732356211] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:31:32,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:31:32,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [133, 3, 3] total 137 [2022-07-20 05:31:32,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613831664] [2022-07-20 05:31:32,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:31:32,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-07-20 05:31:32,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:31:32,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-07-20 05:31:32,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8788, Invalid=9844, Unknown=0, NotChecked=0, Total=18632 [2022-07-20 05:31:32,640 INFO L87 Difference]: Start difference. First operand 707 states and 771 transitions. Second operand has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:31:41,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:31:41,343 INFO L93 Difference]: Finished difference Result 714 states and 748 transitions. [2022-07-20 05:31:41,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-07-20 05:31:41,343 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 533 [2022-07-20 05:31:41,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:31:41,346 INFO L225 Difference]: With dead ends: 714 [2022-07-20 05:31:41,346 INFO L226 Difference]: Without dead ends: 714 [2022-07-20 05:31:41,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1331 GetRequests, 1062 SyntacticMatches, 1 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9298 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=26749, Invalid=45881, Unknown=0, NotChecked=0, Total=72630 [2022-07-20 05:31:41,352 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 416 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:31:41,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [416 Valid, 271 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 428 Invalid, 0 Unknown, 36 Unchecked, 0.3s Time] [2022-07-20 05:31:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-07-20 05:31:41,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 710. [2022-07-20 05:31:41,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 705 states have (on average 1.0539007092198582) internal successors, (743), 709 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:31:41,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 743 transitions. [2022-07-20 05:31:41,361 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 743 transitions. Word has length 533 [2022-07-20 05:31:41,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:31:41,361 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 743 transitions. [2022-07-20 05:31:41,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 4.102189781021898) internal successors, (562), 137 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:31:41,362 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 743 transitions. [2022-07-20 05:31:41,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2022-07-20 05:31:41,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:31:41,370 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 131, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:31:41,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 05:31:41,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-20 05:31:41,587 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2022-07-20 05:31:41,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:31:41,587 INFO L85 PathProgramCache]: Analyzing trace with hash 25239908, now seen corresponding path program 1 times [2022-07-20 05:31:41,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:31:41,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141860429] [2022-07-20 05:31:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:31:41,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:31:41,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:31:41,863 INFO L134 CoverageAnalysis]: Checked inductivity of 34193 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 34191 trivial. 0 not checked. [2022-07-20 05:31:41,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:31:41,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141860429] [2022-07-20 05:31:41,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141860429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:31:41,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231864488] [2022-07-20 05:31:41,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:31:41,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:31:41,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:31:41,868 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:31:41,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 05:31:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:31:42,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 1920 conjuncts, 133 conjunts are in the unsatisfiable core [2022-07-20 05:31:42,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:31:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 34193 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:31:48,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:32:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 34193 backedges. 0 proven. 34191 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 05:32:04,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231864488] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:32:04,436 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:32:04,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 134, 134] total 271 [2022-07-20 05:32:04,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924018839] [2022-07-20 05:32:04,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:32:04,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 271 states [2022-07-20 05:32:04,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:32:04,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 271 interpolants. [2022-07-20 05:32:04,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35790, Invalid=37380, Unknown=0, NotChecked=0, Total=73170 [2022-07-20 05:32:04,454 INFO L87 Difference]: Start difference. First operand 710 states and 743 transitions. Second operand has 271 states, 271 states have (on average 3.985239852398524) internal successors, (1080), 271 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)