./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/verifythis/prefixsum_iter.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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/verifythis/prefixsum_iter.c -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 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:47:51,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:47:51,916 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:47:51,960 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:47:51,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:47:51,962 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:47:51,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:47:51,966 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:47:51,968 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:47:51,969 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:47:51,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:47:51,972 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:47:51,973 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:47:51,977 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:47:51,978 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:47:51,981 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:47:51,982 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:47:51,983 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:47:51,984 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:47:51,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:47:51,992 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:47:51,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:47:51,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:47:51,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:47:51,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:47:52,002 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:47:52,002 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:47:52,003 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:47:52,004 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:47:52,004 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:47:52,005 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:47:52,005 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:47:52,007 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:47:52,007 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:47:52,008 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:47:52,009 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:47:52,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:47:52,009 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:47:52,010 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:47:52,010 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:47:52,011 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:47:52,012 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:47:52,013 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 05:47:52,041 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:47:52,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:47:52,042 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:47:52,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:47:52,043 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:47:52,043 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:47:52,044 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:47:52,044 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:47:52,044 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:47:52,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:47:52,045 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:47:52,045 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:47:52,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:47:52,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:47:52,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:47:52,046 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:47:52,046 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:47:52,047 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 05:47:52,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:47:52,047 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:47:52,047 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:47:52,047 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:47:52,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:47:52,048 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:47:52,048 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:47:52,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:47:52,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:47:52,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:47:52,049 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 05:47:52,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 05:47:52,049 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cd641fa41c29ed0240eed782d3555502472fe8bb63d504547076d8eeefa2c0d [2022-07-23 05:47:52,293 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:47:52,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:47:52,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:47:52,322 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:47:52,322 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:47:52,323 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-07-23 05:47:52,390 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d110a84b0/76cce74b80e64836988e609dc9a314d3/FLAG918e7a3f9 [2022-07-23 05:47:52,740 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:47:52,741 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/prefixsum_iter.c [2022-07-23 05:47:52,746 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d110a84b0/76cce74b80e64836988e609dc9a314d3/FLAG918e7a3f9 [2022-07-23 05:47:52,755 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d110a84b0/76cce74b80e64836988e609dc9a314d3 [2022-07-23 05:47:52,757 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:47:52,758 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:47:52,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:47:52,760 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:47:52,768 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:47:52,769 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:47:52" (1/1) ... [2022-07-23 05:47:52,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bd7185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:47:52, skipping insertion in model container [2022-07-23 05:47:52,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:47:52" (1/1) ... [2022-07-23 05:47:52,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:47:52,791 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:47:52,937 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/verifythis/prefixsum_iter.c[526,539] [2022-07-23 05:47:52,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:47:52,970 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:47:52,980 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/verifythis/prefixsum_iter.c[526,539] [2022-07-23 05:47:53,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:47:53,018 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:47:53,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:47:53 WrapperNode [2022-07-23 05:47:53,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:47:53,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:47:53,019 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:47:53,019 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:47:53,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:47:53" (1/1) ... [2022-07-23 05:47:53,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:47:53" (1/1) ... [2022-07-23 05:47:53,054 INFO L137 Inliner]: procedures = 22, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 131 [2022-07-23 05:47:53,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:47:53,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:47:53,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:47:53,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:47:53,063 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:47:53" (1/1) ... [2022-07-23 05:47:53,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:47:53" (1/1) ... [2022-07-23 05:47:53,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:47:53" (1/1) ... [2022-07-23 05:47:53,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:47:53" (1/1) ... [2022-07-23 05:47:53,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:47:53" (1/1) ... [2022-07-23 05:47:53,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:47:53" (1/1) ... [2022-07-23 05:47:53,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:47:53" (1/1) ... [2022-07-23 05:47:53,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:47:53,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:47:53,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:47:53,087 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:47:53,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:47:53" (1/1) ... [2022-07-23 05:47:53,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:47:53,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:47:53,115 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) [2022-07-23 05:47:53,139 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 [2022-07-23 05:47:53,161 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 05:47:53,161 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-23 05:47:53,161 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-23 05:47:53,161 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-23 05:47:53,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-23 05:47:53,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 05:47:53,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:47:53,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:47:53,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-23 05:47:53,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2022-07-23 05:47:53,166 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2022-07-23 05:47:53,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 05:47:53,230 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:47:53,232 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:47:53,593 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:47:53,601 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:47:53,601 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2022-07-23 05:47:53,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:47:53 BoogieIcfgContainer [2022-07-23 05:47:53,603 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:47:53,604 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:47:53,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:47:53,607 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:47:53,607 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:47:52" (1/3) ... [2022-07-23 05:47:53,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1477cf1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:47:53, skipping insertion in model container [2022-07-23 05:47:53,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:47:53" (2/3) ... [2022-07-23 05:47:53,608 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1477cf1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:47:53, skipping insertion in model container [2022-07-23 05:47:53,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:47:53" (3/3) ... [2022-07-23 05:47:53,609 INFO L111 eAbstractionObserver]: Analyzing ICFG prefixsum_iter.c [2022-07-23 05:47:53,622 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:47:53,622 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-07-23 05:47:53,660 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:47:53,666 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@a55d5ee, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@d694ccd [2022-07-23 05:47:53,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2022-07-23 05:47:53,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 102 states, 61 states have (on average 1.819672131147541) internal successors, (111), 95 states have internal predecessors, (111), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:47:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 05:47:53,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:53,682 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:53,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-23 05:47:53,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:53,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1116940539, now seen corresponding path program 1 times [2022-07-23 05:47:53,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:47:53,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103030326] [2022-07-23 05:47:53,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:47:53,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:47:53,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:53,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:47:53,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:53,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-23 05:47:53,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:53,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-23 05:47:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:53,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-23 05:47:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 05:47:53,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:47:53,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103030326] [2022-07-23 05:47:53,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103030326] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:47:53,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:47:53,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:47:53,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210086579] [2022-07-23 05:47:53,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:47:53,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:47:53,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:47:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:47:53,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:47:53,938 INFO L87 Difference]: Start difference. First operand has 102 states, 61 states have (on average 1.819672131147541) internal successors, (111), 95 states have internal predecessors, (111), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 05:47:54,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:54,015 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2022-07-23 05:47:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:47:54,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-07-23 05:47:54,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:54,026 INFO L225 Difference]: With dead ends: 102 [2022-07-23 05:47:54,026 INFO L226 Difference]: Without dead ends: 100 [2022-07-23 05:47:54,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:47:54,033 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 3 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:54,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 195 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:47:54,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-23 05:47:54,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-07-23 05:47:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 93 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:47:54,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2022-07-23 05:47:54,069 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 29 [2022-07-23 05:47:54,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:54,070 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2022-07-23 05:47:54,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 05:47:54,070 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2022-07-23 05:47:54,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 05:47:54,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:54,072 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:54,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 05:47:54,072 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-23 05:47:54,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:54,073 INFO L85 PathProgramCache]: Analyzing trace with hash 236420795, now seen corresponding path program 1 times [2022-07-23 05:47:54,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:47:54,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866121396] [2022-07-23 05:47:54,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:47:54,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:47:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:54,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:47:54,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:54,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-23 05:47:54,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:54,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-23 05:47:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:54,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-23 05:47:54,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 05:47:54,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:47:54,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866121396] [2022-07-23 05:47:54,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866121396] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:47:54,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:47:54,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:47:54,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500336372] [2022-07-23 05:47:54,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:47:54,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:47:54,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:47:54,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:47:54,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:47:54,230 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 05:47:54,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:54,342 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2022-07-23 05:47:54,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:47:54,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-07-23 05:47:54,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:54,345 INFO L225 Difference]: With dead ends: 98 [2022-07-23 05:47:54,345 INFO L226 Difference]: Without dead ends: 98 [2022-07-23 05:47:54,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:47:54,346 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 153 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:54,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 158 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:47:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-23 05:47:54,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-07-23 05:47:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 60 states have (on average 1.6333333333333333) internal successors, (98), 91 states have internal predecessors, (98), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:47:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2022-07-23 05:47:54,355 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 29 [2022-07-23 05:47:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:54,356 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2022-07-23 05:47:54,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 05:47:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2022-07-23 05:47:54,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-23 05:47:54,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:54,358 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:54,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 05:47:54,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-23 05:47:54,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:54,359 INFO L85 PathProgramCache]: Analyzing trace with hash 236420796, now seen corresponding path program 1 times [2022-07-23 05:47:54,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:47:54,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003454233] [2022-07-23 05:47:54,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:47:54,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:47:54,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:54,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:47:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:54,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-23 05:47:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:54,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-23 05:47:54,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:54,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-23 05:47:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 05:47:54,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:47:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003454233] [2022-07-23 05:47:54,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003454233] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:47:54,482 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:47:54,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:47:54,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407844661] [2022-07-23 05:47:54,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:47:54,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:47:54,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:47:54,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:47:54,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:47:54,484 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 05:47:54,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:54,776 INFO L93 Difference]: Finished difference Result 173 states and 186 transitions. [2022-07-23 05:47:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:47:54,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-07-23 05:47:54,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:54,783 INFO L225 Difference]: With dead ends: 173 [2022-07-23 05:47:54,783 INFO L226 Difference]: Without dead ends: 173 [2022-07-23 05:47:54,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:47:54,787 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 395 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:54,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 192 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:47:54,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-23 05:47:54,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 99. [2022-07-23 05:47:54,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 62 states have (on average 1.6129032258064515) internal successors, (100), 92 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:47:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 108 transitions. [2022-07-23 05:47:54,811 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 108 transitions. Word has length 29 [2022-07-23 05:47:54,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:54,812 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 108 transitions. [2022-07-23 05:47:54,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 05:47:54,813 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 108 transitions. [2022-07-23 05:47:54,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 05:47:54,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:54,815 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:54,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 05:47:54,816 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-23 05:47:54,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:54,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1260889940, now seen corresponding path program 1 times [2022-07-23 05:47:54,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:47:54,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341414796] [2022-07-23 05:47:54,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:47:54,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:47:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:54,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:47:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:54,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-23 05:47:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:54,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-23 05:47:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:54,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-23 05:47:54,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:54,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 05:47:54,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:47:54,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341414796] [2022-07-23 05:47:54,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341414796] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:47:54,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:47:54,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:47:54,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568970505] [2022-07-23 05:47:54,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:47:54,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:47:54,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:47:54,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:47:54,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:47:54,878 INFO L87 Difference]: Start difference. First operand 99 states and 108 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 05:47:54,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:54,949 INFO L93 Difference]: Finished difference Result 98 states and 107 transitions. [2022-07-23 05:47:54,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:47:54,950 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-07-23 05:47:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:54,951 INFO L225 Difference]: With dead ends: 98 [2022-07-23 05:47:54,951 INFO L226 Difference]: Without dead ends: 98 [2022-07-23 05:47:54,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:47:54,959 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 148 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:54,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 166 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:47:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-23 05:47:54,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-07-23 05:47:54,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 62 states have (on average 1.596774193548387) internal successors, (99), 91 states have internal predecessors, (99), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:47:54,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 107 transitions. [2022-07-23 05:47:54,975 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 107 transitions. Word has length 30 [2022-07-23 05:47:54,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:54,976 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 107 transitions. [2022-07-23 05:47:54,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 05:47:54,976 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 107 transitions. [2022-07-23 05:47:54,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 05:47:54,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:54,979 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:54,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-23 05:47:54,980 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-23 05:47:54,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:54,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1260889939, now seen corresponding path program 1 times [2022-07-23 05:47:54,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:47:54,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616811643] [2022-07-23 05:47:54,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:47:54,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:47:55,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:55,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:47:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:55,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-23 05:47:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:55,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-23 05:47:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:55,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-23 05:47:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:55,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 05:47:55,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:47:55,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616811643] [2022-07-23 05:47:55,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616811643] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:47:55,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:47:55,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:47:55,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372684228] [2022-07-23 05:47:55,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:47:55,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:47:55,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:47:55,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:47:55,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:47:55,101 INFO L87 Difference]: Start difference. First operand 98 states and 107 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 05:47:55,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:55,286 INFO L93 Difference]: Finished difference Result 169 states and 182 transitions. [2022-07-23 05:47:55,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:47:55,286 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-07-23 05:47:55,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:55,287 INFO L225 Difference]: With dead ends: 169 [2022-07-23 05:47:55,288 INFO L226 Difference]: Without dead ends: 169 [2022-07-23 05:47:55,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:47:55,288 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 241 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:55,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 230 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:47:55,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-23 05:47:55,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 136. [2022-07-23 05:47:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 100 states have (on average 1.66) internal successors, (166), 129 states have internal predecessors, (166), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:47:55,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 174 transitions. [2022-07-23 05:47:55,294 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 174 transitions. Word has length 30 [2022-07-23 05:47:55,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:55,294 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 174 transitions. [2022-07-23 05:47:55,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-23 05:47:55,295 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 174 transitions. [2022-07-23 05:47:55,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 05:47:55,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:55,296 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:55,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-23 05:47:55,296 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-23 05:47:55,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:55,297 INFO L85 PathProgramCache]: Analyzing trace with hash -535927024, now seen corresponding path program 1 times [2022-07-23 05:47:55,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:47:55,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980596607] [2022-07-23 05:47:55,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:47:55,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:47:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:55,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:47:55,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:55,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-23 05:47:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:55,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-23 05:47:55,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:55,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-23 05:47:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 05:47:55,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:47:55,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980596607] [2022-07-23 05:47:55,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980596607] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:47:55,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:47:55,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 05:47:55,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762071317] [2022-07-23 05:47:55,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:47:55,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:47:55,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:47:55,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:47:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:47:55,363 INFO L87 Difference]: Start difference. First operand 136 states and 174 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-23 05:47:57,385 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-23 05:47:57,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:57,804 INFO L93 Difference]: Finished difference Result 303 states and 326 transitions. [2022-07-23 05:47:57,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:47:57,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2022-07-23 05:47:57,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:57,806 INFO L225 Difference]: With dead ends: 303 [2022-07-23 05:47:57,806 INFO L226 Difference]: Without dead ends: 303 [2022-07-23 05:47:57,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:47:57,814 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 508 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:57,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 477 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-07-23 05:47:57,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-23 05:47:57,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 130. [2022-07-23 05:47:57,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 94 states have (on average 1.6170212765957446) internal successors, (152), 123 states have internal predecessors, (152), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:47:57,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 160 transitions. [2022-07-23 05:47:57,825 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 160 transitions. Word has length 32 [2022-07-23 05:47:57,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:57,825 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 160 transitions. [2022-07-23 05:47:57,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-23 05:47:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 160 transitions. [2022-07-23 05:47:57,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 05:47:57,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:57,828 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:57,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-23 05:47:57,829 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-23 05:47:57,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:57,829 INFO L85 PathProgramCache]: Analyzing trace with hash 566089799, now seen corresponding path program 1 times [2022-07-23 05:47:57,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:47:57,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2831350] [2022-07-23 05:47:57,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:47:57,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:47:57,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:57,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:47:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:57,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-23 05:47:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:57,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-23 05:47:57,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:57,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-23 05:47:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 05:47:57,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:47:57,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2831350] [2022-07-23 05:47:57,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2831350] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:47:57,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:47:57,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:47:57,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350805888] [2022-07-23 05:47:57,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:47:57,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:47:57,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:47:57,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:47:57,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:47:57,920 INFO L87 Difference]: Start difference. First operand 130 states and 160 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 05:47:58,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:47:58,054 INFO L93 Difference]: Finished difference Result 124 states and 148 transitions. [2022-07-23 05:47:58,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:47:58,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2022-07-23 05:47:58,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:47:58,055 INFO L225 Difference]: With dead ends: 124 [2022-07-23 05:47:58,055 INFO L226 Difference]: Without dead ends: 124 [2022-07-23 05:47:58,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:47:58,056 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 175 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:47:58,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 172 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:47:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-23 05:47:58,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-07-23 05:47:58,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 94 states have (on average 1.4893617021276595) internal successors, (140), 117 states have internal predecessors, (140), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-23 05:47:58,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 148 transitions. [2022-07-23 05:47:58,060 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 148 transitions. Word has length 33 [2022-07-23 05:47:58,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:47:58,061 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 148 transitions. [2022-07-23 05:47:58,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 05:47:58,061 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 148 transitions. [2022-07-23 05:47:58,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 05:47:58,061 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:47:58,062 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:47:58,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-23 05:47:58,062 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-23 05:47:58,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:47:58,063 INFO L85 PathProgramCache]: Analyzing trace with hash 566089800, now seen corresponding path program 1 times [2022-07-23 05:47:58,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:47:58,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261023776] [2022-07-23 05:47:58,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:47:58,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:47:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:58,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:47:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:58,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-23 05:47:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:58,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-23 05:47:58,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:58,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-23 05:47:58,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:47:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:47:58,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:47:58,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261023776] [2022-07-23 05:47:58,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261023776] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:47:58,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:47:58,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-23 05:47:58,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62038801] [2022-07-23 05:47:58,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:47:58,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:47:58,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:47:58,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:47:58,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:47:58,212 INFO L87 Difference]: Start difference. First operand 124 states and 148 transitions. Second operand has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 05:48:00,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-23 05:48:00,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:00,686 INFO L93 Difference]: Finished difference Result 208 states and 241 transitions. [2022-07-23 05:48:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:48:00,687 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2022-07-23 05:48:00,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:00,688 INFO L225 Difference]: With dead ends: 208 [2022-07-23 05:48:00,688 INFO L226 Difference]: Without dead ends: 208 [2022-07-23 05:48:00,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:48:00,689 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 340 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 961 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:00,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 961 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 207 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-23 05:48:00,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-07-23 05:48:00,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 134. [2022-07-23 05:48:00,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 101 states have (on average 1.4653465346534653) internal successors, (148), 124 states have internal predecessors, (148), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-23 05:48:00,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 162 transitions. [2022-07-23 05:48:00,693 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 162 transitions. Word has length 33 [2022-07-23 05:48:00,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:00,694 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 162 transitions. [2022-07-23 05:48:00,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-23 05:48:00,694 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 162 transitions. [2022-07-23 05:48:00,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-23 05:48:00,694 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:00,694 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:00,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-23 05:48:00,695 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-23 05:48:00,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:00,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1785256912, now seen corresponding path program 1 times [2022-07-23 05:48:00,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:00,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560906480] [2022-07-23 05:48:00,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:00,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:00,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:48:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:00,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-23 05:48:00,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:00,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-07-23 05:48:00,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:00,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-23 05:48:00,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 05:48:00,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:00,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560906480] [2022-07-23 05:48:00,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560906480] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:00,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285398684] [2022-07-23 05:48:00,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:00,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:00,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:00,855 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) [2022-07-23 05:48:00,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 05:48:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:00,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 05:48:00,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:01,010 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 05:48:01,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-23 05:48:01,113 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:48:01,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2022-07-23 05:48:01,142 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:48:01,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-23 05:48:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:48:01,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:01,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285398684] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:01,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:48:01,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-07-23 05:48:01,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418021313] [2022-07-23 05:48:01,681 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:01,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:48:01,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:01,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:48:01,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-07-23 05:48:01,682 INFO L87 Difference]: Start difference. First operand 134 states and 162 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 05:48:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:02,024 INFO L93 Difference]: Finished difference Result 157 states and 171 transitions. [2022-07-23 05:48:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:48:02,025 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 34 [2022-07-23 05:48:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:02,026 INFO L225 Difference]: With dead ends: 157 [2022-07-23 05:48:02,026 INFO L226 Difference]: Without dead ends: 157 [2022-07-23 05:48:02,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:48:02,027 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 386 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:02,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 395 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 308 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-07-23 05:48:02,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-23 05:48:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 136. [2022-07-23 05:48:02,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 103 states have (on average 1.4466019417475728) internal successors, (149), 125 states have internal predecessors, (149), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-23 05:48:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 163 transitions. [2022-07-23 05:48:02,031 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 163 transitions. Word has length 34 [2022-07-23 05:48:02,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:02,031 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 163 transitions. [2022-07-23 05:48:02,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 10 states have internal predecessors, (31), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 05:48:02,031 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 163 transitions. [2022-07-23 05:48:02,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-23 05:48:02,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:02,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:02,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-23 05:48:02,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:02,244 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 31 more)] === [2022-07-23 05:48:02,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:02,244 INFO L85 PathProgramCache]: Analyzing trace with hash 661582495, now seen corresponding path program 1 times [2022-07-23 05:48:02,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:02,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085472670] [2022-07-23 05:48:02,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:02,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:02,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-23 05:48:02,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:02,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-23 05:48:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:02,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-23 05:48:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:02,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-23 05:48:02,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:48:02,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:02,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085472670] [2022-07-23 05:48:02,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085472670] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:02,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656704031] [2022-07-23 05:48:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:02,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:02,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:02,412 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) [2022-07-23 05:48:02,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process